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ARM: tegra: DT-related fixes needed by the MMC tree

Browse Source 
In order to convert the Tegra MMC driver to using mmc_of_parse(), some
 bugs in the Tegra device-tree content need to be fixed first; it's
 currently wrong but unused, and mmc_of_parse() causes that data to be
 used for the first time.
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Merge tag 'tegra-for-3.10-fixes-for-mmc' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into mmc-next

ARM: tegra: DT-related fixes needed by the MMC tree

In order to convert the Tegra MMC driver to using mmc_of_parse(), some
bugs in the Tegra device-tree content need to be fixed first; it's
currently wrong but unused, and mmc_of_parse() causes that data to be
used for the first time.
This commit is contained in:
Chris Ball 2013-03-19 13:07:13 -04:00
commit 2c06aeb25c
2430 changed files with 112413 additions and 34686 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/00-INDEX
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@ -299,6 +299,8 @@ memory-hotplug.txt
- Hotpluggable memory support, how to use and current status.
memory.txt
- info on typical Linux memory problems.
metag/
- directory with info about Linux on Meta architecture.
mips/
- directory with info about Linux on MIPS architecture.
misc-devices/

45
Documentation/ABI/testing/sysfs-bus-fcoe
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@ -1,14 +1,53 @@
What: /sys/bus/fcoe/ctlr_X
What: /sys/bus/fcoe/
Date: August 2012
KernelVersion: TBD
Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org
Description: The FCoE bus. Attributes in this directory are control interfaces.
Attributes:
ctlr_create: 'FCoE Controller' instance creation interface. Writing an
<ifname> to this file will allocate and populate sysfs with a
fcoe_ctlr_device (ctlr_X). The user can then configure any
per-port settings and finally write to the fcoe_ctlr_device's
'start' attribute to begin the kernel's discovery and login
process.
ctlr_destroy: 'FCoE Controller' instance removal interface. Writing a
fcoe_ctlr_device's sysfs name to this file will log the
fcoe_ctlr_device out of the fabric or otherwise connected
FCoE devices. It will also free all kernel memory allocated
for this fcoe_ctlr_device and any structures associated
with it, this includes the scsi_host.
What: /sys/bus/fcoe/devices/ctlr_X
Date: March 2012
KernelVersion: TBD
Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org
Description: 'FCoE Controller' instances on the fcoe bus
Description: 'FCoE Controller' instances on the fcoe bus.
The FCoE Controller now has a three stage creation process.
1) Write interface name to ctlr_create 2) Configure the FCoE
Controller (ctlr_X) 3) Enable the FCoE Controller to begin
discovery and login. The FCoE Controller is destroyed by
writing it's name, i.e. ctlr_X to the ctlr_delete file.
Attributes:
fcf_dev_loss_tmo: Device loss timeout peroid (see below). Changing
this value will change the dev_loss_tmo for all
FCFs discovered by this controller.
mode: Display or change the FCoE Controller's mode. Possible
modes are 'Fabric' and 'VN2VN'. If a FCoE Controller
is started in 'Fabric' mode then FIP FCF discovery is
initiated and ultimately a fabric login is attempted.
If a FCoE Controller is started in 'VN2VN' mode then
FIP VN2VN discovery and login is performed. A FCoE
Controller only supports one mode at a time.
enabled: Whether an FCoE controller is enabled or disabled.
0 if disabled, 1 if enabled. Writing either 0 or 1
to this file will enable or disable the FCoE controller.
lesb/link_fail: Link Error Status Block (LESB) link failure count.
lesb/vlink_fail: Link Error Status Block (LESB) virtual link
@ -26,7 +65,7 @@ Attributes:
Notes: ctlr_X (global increment starting at 0)
What: /sys/bus/fcoe/fcf_X
What: /sys/bus/fcoe/devices/fcf_X
Date: March 2012
KernelVersion: TBD
Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org

83
Documentation/ABI/testing/sysfs-platform-msi-laptop Normal file
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@ -0,0 +1,83 @@
What: /sys/devices/platform/msi-laptop-pf/lcd_level
Date: Oct 2006
KernelVersion: 2.6.19
Contact: "Lennart Poettering <mzxreary@0pointer.de>"
Description:
Screen brightness: contains a single integer in the range 0..8.
What: /sys/devices/platform/msi-laptop-pf/auto_brightness
Date: Oct 2006
KernelVersion: 2.6.19
Contact: "Lennart Poettering <mzxreary@0pointer.de>"
Description:
Enable automatic brightness control: contains either 0 or 1. If
set to 1 the hardware adjusts the screen brightness
automatically when the power cord is plugged/unplugged.
What: /sys/devices/platform/msi-laptop-pf/wlan
Date: Oct 2006
KernelVersion: 2.6.19
Contact: "Lennart Poettering <mzxreary@0pointer.de>"
Description:
WLAN subsystem enabled: contains either 0 or 1.
What: /sys/devices/platform/msi-laptop-pf/bluetooth
Date: Oct 2006
KernelVersion: 2.6.19
Contact: "Lennart Poettering <mzxreary@0pointer.de>"
Description:
Bluetooth subsystem enabled: contains either 0 or 1. Please
note that this file is constantly 0 if no Bluetooth hardware is
available.
What: /sys/devices/platform/msi-laptop-pf/touchpad
Date: Nov 2012
KernelVersion: 3.8
Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>"
Description:
Contains either 0 or 1 and indicates if touchpad is turned on.
Touchpad state can only be toggled by pressing Fn+F3.
What: /sys/devices/platform/msi-laptop-pf/turbo_mode
Date: Nov 2012
KernelVersion: 3.8
Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>"
Description:
Contains either 0 or 1 and indicates if turbo mode is turned
on. In turbo mode power LED is orange and processor is
overclocked. Turbo mode is available only if charging. It is
only possible to toggle turbo mode state by pressing Fn+F10,
and there is a few seconds cooldown between subsequent toggles.
If user presses Fn+F10 too frequent, turbo mode state is not
changed.
What: /sys/devices/platform/msi-laptop-pf/eco_mode
Date: Nov 2012
KernelVersion: 3.8
Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>"
Description:
Contains either 0 or 1 and indicates if ECO mode is turned on.
In ECO mode power LED is green and userspace should do some
powersaving actions. ECO mode is available only on battery
power. ECO mode can only be toggled by pressing Fn+F10.
What: /sys/devices/platform/msi-laptop-pf/turbo_cooldown
Date: Nov 2012
KernelVersion: 3.8
Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>"
Description:
Contains value in range 0..3:
* 0 -> Turbo mode is off
* 1 -> Turbo mode is on, cannot be turned off yet
* 2 -> Turbo mode is off, cannot be turned on yet
* 3 -> Turbo mode is on
What: /sys/devices/platform/msi-laptop-pf/auto_fan
Date: Nov 2012
KernelVersion: 3.8
Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>"
Description:
Contains either 0 or 1 and indicates if fan speed is controlled
automatically (1) or fan runs at maximal speed (0). Can be
toggled in software.

9
Documentation/DMA-API-HOWTO.txt
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@ -488,9 +488,10 @@ will invoke the generic mapping error check interface. Doing so will ensure
that the mapping code will work correctly on all dma implementations without
any dependency on the specifics of the underlying implementation. Using the
returned address without checking for errors could result in failures ranging
from panics to silent data corruption. Couple of example of incorrect ways to
check for errors that make assumptions about the underlying dma implementation
are as follows and these are applicable to dma_map_page() as well.
from panics to silent data corruption. A couple of examples of incorrect ways
to check for errors that make assumptions about the underlying dma
implementation are as follows and these are applicable to dma_map_page() as
well.
Incorrect example 1:
dma_addr_t dma_handle;
@ -751,7 +752,7 @@ Example 1:
dma_unmap_single(dma_handle1);
map_error_handling1:
Example 2: (if buffers are allocated a loop, unmap all mapped buffers when
Example 2: (if buffers are allocated in a loop, unmap all mapped buffers when
mapping error is detected in the middle)
dma_addr_t dma_addr;

18
Documentation/IPMI.txt
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@ -348,34 +348,40 @@ You can change this at module load time (for a module) with:
modprobe ipmi_si.o type=<type1>,<type2>....
ports=<port1>,<port2>... addrs=<addr1>,<addr2>...
irqs=<irq1>,<irq2>... trydefaults=[0|1]
irqs=<irq1>,<irq2>...
regspacings=<sp1>,<sp2>,... regsizes=<size1>,<size2>,...
regshifts=<shift1>,<shift2>,...
slave_addrs=<addr1>,<addr2>,...
force_kipmid=<enable1>,<enable2>,...
kipmid_max_busy_us=<ustime1>,<ustime2>,...
unload_when_empty=[0|1]
trydefaults=[0|1] trydmi=[0|1] tryacpi=[0|1]
tryplatform=[0|1] trypci=[0|1]
Each of these except si_trydefaults is a list, the first item for the
Each of these except try... items is a list, the first item for the
first interface, second item for the second interface, etc.
The si_type may be either "kcs", "smic", or "bt". If you leave it blank, it
defaults to "kcs".
If you specify si_addrs as non-zero for an interface, the driver will
If you specify addrs as non-zero for an interface, the driver will
use the memory address given as the address of the device. This
overrides si_ports.
If you specify si_ports as non-zero for an interface, the driver will
If you specify ports as non-zero for an interface, the driver will
use the I/O port given as the device address.
If you specify si_irqs as non-zero for an interface, the driver will
If you specify irqs as non-zero for an interface, the driver will
attempt to use the given interrupt for the device.
si_trydefaults sets whether the standard IPMI interface at 0xca2 and
trydefaults sets whether the standard IPMI interface at 0xca2 and
any interfaces specified by ACPE are tried. By default, the driver
tries it, set this value to zero to turn this off.
The other try... items disable discovery by their corresponding
names. These are all enabled by default, set them to zero to disable
them. The tryplatform disables openfirmware.
The next three parameters have to do with register layout. The
registers used by the interfaces may not appear at successive
locations and they may not be in 8-bit registers. These parameters

58
Documentation/block/cfq-iosched.txt
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@ -102,6 +102,64 @@ processing of request. Therefore, increasing the value can imporve the
performace although this can cause the latency of some I/O to increase due
to more number of requests.
CFQ Group scheduling
====================
CFQ supports blkio cgroup and has "blkio." prefixed files in each
blkio cgroup directory. It is weight-based and there are four knobs
for configuration - weight[_device] and leaf_weight[_device].
Internal cgroup nodes (the ones with children) can also have tasks in
them, so the former two configure how much proportion the cgroup as a
whole is entitled to at its parent's level while the latter two
configure how much proportion the tasks in the cgroup have compared to
its direct children.
Another way to think about it is assuming that each internal node has
an implicit leaf child node which hosts all the tasks whose weight is
configured by leaf_weight[_device]. Let's assume a blkio hierarchy
composed of five cgroups - root, A, B, AA and AB - with the following
weights where the names represent the hierarchy.
weight leaf_weight
root : 125 125
A : 500 750
B : 250 500
AA : 500 500
AB : 1000 500
root never has a parent making its weight is meaningless. For backward
compatibility, weight is always kept in sync with leaf_weight. B, AA
and AB have no child and thus its tasks have no children cgroup to
compete with. They always get 100% of what the cgroup won at the
parent level. Considering only the weights which matter, the hierarchy
looks like the following.
root
/ | \
A B leaf
500 250 125
/ | \
AA AB leaf
500 1000 750
If all cgroups have active IOs and competing with each other, disk
time will be distributed like the following.
Distribution below root. The total active weight at this level is
A:500 + B:250 + C:125 = 875.
root-leaf : 125 / 875 =~ 14%
A : 500 / 875 =~ 57%
B(-leaf) : 250 / 875 =~ 28%
A has children and further distributes its 57% among the children and
the implicit leaf node. The total active weight at this level is
AA:500 + AB:1000 + A-leaf:750 = 2250.
A-leaf : ( 750 / 2250) * A =~ 19%
AA(-leaf) : ( 500 / 2250) * A =~ 12%
AB(-leaf) : (1000 / 2250) * A =~ 25%
CFQ IOPS Mode for group scheduling
===================================
Basic CFQ design is to provide priority based time slices. Higher priority

38
Documentation/blockdev/nbd.txt
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@ -4,43 +4,13 @@
can use a remote server as one of its block devices. So every time
the client computer wants to read, e.g., /dev/nb0, it sends a
request over TCP to the server, which will reply with the data read.
This can be used for stations with low disk space (or even diskless -
if you boot from floppy) to borrow disk space from another computer.
Unlike NFS, it is possible to put any filesystem on it, etc. It should
even be possible to use NBD as a root filesystem (I've never tried),
but it requires a user-level program to be in the initrd to start.
It also allows you to run block-device in user land (making server
and client physically the same computer, communicating using loopback).
Current state: It currently works. Network block device is stable.
I originally thought that it was impossible to swap over TCP. It
turned out not to be true - swapping over TCP now works and seems
to be deadlock-free, but it requires heavy patches into Linux's
network layer.
This can be used for stations with low disk space (or even diskless)
to borrow disk space from another computer.
Unlike NFS, it is possible to put any filesystem on it, etc.
For more information, or to download the nbd-client and nbd-server
tools, go to http://nbd.sf.net/.
Howto: To setup nbd, you can simply do the following:
First, serve a device or file from a remote server:
nbd-server <port-number> <device-or-file-to-serve-to-client>
e.g.,
root@server1 # nbd-server 1234 /dev/sdb1
(serves sdb1 partition on TCP port 1234)
Then, on the local (client) system:
nbd-client <server-name-or-IP> <server-port-number> /dev/nb[0-n]
e.g.,
root@client1 # nbd-client server1 1234 /dev/nb0
(creates the nb0 device on client1)
The nbd kernel module need only be installed on the client
system, as the nbd-server is completely in userspace. In fact,
the nbd-server has been successfully ported to other operating

37
Documentation/cgroups/blkio-controller.txt
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@ -75,7 +75,7 @@ Throttling/Upper Limit policy
mount -t cgroup -o blkio none /sys/fs/cgroup/blkio
- Specify a bandwidth rate on particular device for root group. The format
for policy is "<major>:<minor> <byes_per_second>".
for policy is "<major>:<minor> <bytes_per_second>".
echo "8:16 1048576" > /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device
@ -94,13 +94,11 @@ Throttling/Upper Limit policy
Hierarchical Cgroups
====================
- Currently none of the IO control policy supports hierarchical groups. But
cgroup interface does allow creation of hierarchical cgroups and internally
IO policies treat them as flat hierarchy.
- Currently only CFQ supports hierarchical groups. For throttling,
cgroup interface does allow creation of hierarchical cgroups and
internally it treats them as flat hierarchy.
So this patch will allow creation of cgroup hierarchcy but at the backend
everything will be treated as flat. So if somebody created a hierarchy like
as follows.
If somebody created a hierarchy like as follows.
root
/ \
@ -108,16 +106,20 @@ Hierarchical Cgroups
|
test3
CFQ and throttling will practically treat all groups at same level.
CFQ will handle the hierarchy correctly but and throttling will
practically treat all groups at same level. For details on CFQ
hierarchy support, refer to Documentation/block/cfq-iosched.txt.
Throttling will treat the hierarchy as if it looks like the
following.
pivot
/ / \ \
root test1 test2 test3
Down the line we can implement hierarchical accounting/control support
and also introduce a new cgroup file "use_hierarchy" which will control
whether cgroup hierarchy is viewed as flat or hierarchical by the policy..
This is how memory controller also has implemented the things.
Nesting cgroups, while allowed, isn't officially supported and blkio
genereates warning when cgroups nest. Once throttling implements
hierarchy support, hierarchy will be supported and the warning will
be removed.
Various user visible config options
===================================
@ -172,6 +174,12 @@ Proportional weight policy files
dev weight
8:16 300
- blkio.leaf_weight[_device]
- Equivalents of blkio.weight[_device] for the purpose of
deciding how much weight tasks in the given cgroup has while
competing with the cgroup's child cgroups. For details,
please refer to Documentation/block/cfq-iosched.txt.
- blkio.time
- disk time allocated to cgroup per device in milliseconds. First
two fields specify the major and minor number of the device and
@ -279,6 +287,11 @@ Proportional weight policy files
and minor number of the device and third field specifies the number
of times a group was dequeued from a particular device.
- blkio.*_recursive
- Recursive version of various stats. These files show the
same information as their non-recursive counterparts but
include stats from all the descendant cgroups.
Throttling/Upper limit policy files
-----------------------------------
- blkio.throttle.read_bps_device

4
Documentation/coccinelle.txt
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@ -87,6 +87,10 @@ As any static code analyzer, Coccinelle produces false
positives. Thus, reports must be carefully checked, and patches
reviewed.
To enable verbose messages set the V= variable, for example:
make coccicheck MODE=report V=1
Using Coccinelle with a single semantic patch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

77
Documentation/device-mapper/cache-policies.txt Normal file
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@ -0,0 +1,77 @@
Guidance for writing policies
=============================
Try to keep transactionality out of it. The core is careful to
avoid asking about anything that is migrating. This is a pain, but
makes it easier to write the policies.
Mappings are loaded into the policy at construction time.
Every bio that is mapped by the target is referred to the policy.
The policy can return a simple HIT or MISS or issue a migration.
Currently there's no way for the policy to issue background work,
e.g. to start writing back dirty blocks that are going to be evicte
soon.
Because we map bios, rather than requests it's easy for the policy
to get fooled by many small bios. For this reason the core target
issues periodic ticks to the policy. It's suggested that the policy
doesn't update states (eg, hit counts) for a block more than once
for each tick. The core ticks by watching bios complete, and so
trying to see when the io scheduler has let the ios run.
Overview of supplied cache replacement policies
===============================================
multiqueue
----------
This policy is the default.
The multiqueue policy has two sets of 16 queues: one set for entries
waiting for the cache and another one for those in the cache.
Cache entries in the queues are aged based on logical time. Entry into
the cache is based on variable thresholds and queue selection is based
on hit count on entry. The policy aims to take different cache miss
costs into account and to adjust to varying load patterns automatically.
Message and constructor argument pairs are:
'sequential_threshold <#nr_sequential_ios>' and
'random_threshold <#nr_random_ios>'.
The sequential threshold indicates the number of contiguous I/Os
required before a stream is treated as sequential. The random threshold
is the number of intervening non-contiguous I/Os that must be seen
before the stream is treated as random again.
The sequential and random thresholds default to 512 and 4 respectively.
Large, sequential ios are probably better left on the origin device
since spindles tend to have good bandwidth. The io_tracker counts
contiguous I/Os to try to spot when the io is in one of these sequential
modes.
cleaner
-------
The cleaner writes back all dirty blocks in a cache to decommission it.
Examples
========
The syntax for a table is:
cache <metadata dev> <cache dev> <origin dev> <block size>
<#feature_args> [<feature arg>]*
<policy> <#policy_args> [<policy arg>]*
The syntax to send a message using the dmsetup command is:
dmsetup message <mapped device> 0 sequential_threshold 1024
dmsetup message <mapped device> 0 random_threshold 8
Using dmsetup:
dmsetup create blah --table "0 268435456 cache /dev/sdb /dev/sdc \
/dev/sdd 512 0 mq 4 sequential_threshold 1024 random_threshold 8"
creates a 128GB large mapped device named 'blah' with the
sequential threshold set to 1024 and the random_threshold set to 8.

243
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@ -0,0 +1,243 @@
Introduction
============
dm-cache is a device mapper target written by Joe Thornber, Heinz
Mauelshagen, and Mike Snitzer.
It aims to improve performance of a block device (eg, a spindle) by
dynamically migrating some of its data to a faster, smaller device
(eg, an SSD).
This device-mapper solution allows us to insert this caching at
different levels of the dm stack, for instance above the data device for
a thin-provisioning pool. Caching solutions that are integrated more
closely with the virtual memory system should give better performance.
The target reuses the metadata library used in the thin-provisioning
library.
The decision as to what data to migrate and when is left to a plug-in
policy module. Several of these have been written as we experiment,
and we hope other people will contribute others for specific io
scenarios (eg. a vm image server).
Glossary
========
Migration - Movement of the primary copy of a logical block from one
device to the other.
Promotion - Migration from slow device to fast device.
Demotion - Migration from fast device to slow device.
The origin device always contains a copy of the logical block, which
may be out of date or kept in sync with the copy on the cache device
(depending on policy).
Design
======
Sub-devices
-----------
The target is constructed by passing three devices to it (along with
other parameters detailed later):
1. An origin device - the big, slow one.
2. A cache device - the small, fast one.
3. A small metadata device - records which blocks are in the cache,
which are dirty, and extra hints for use by the policy object.
This information could be put on the cache device, but having it
separate allows the volume manager to configure it differently,
e.g. as a mirror for extra robustness.
Fixed block size
----------------
The origin is divided up into blocks of a fixed size. This block size
is configurable when you first create the cache. Typically we've been
using block sizes of 256k - 1024k.
Having a fixed block size simplifies the target a lot. But it is
something of a compromise. For instance, a small part of a block may be
getting hit a lot, yet the whole block will be promoted to the cache.
So large block sizes are bad because they waste cache space. And small
block sizes are bad because they increase the amount of metadata (both
in core and on disk).
Writeback/writethrough
----------------------
The cache has two modes, writeback and writethrough.
If writeback, the default, is selected then a write to a block that is
cached will go only to the cache and the block will be marked dirty in
the metadata.
If writethrough is selected then a write to a cached block will not
complete until it has hit both the origin and cache devices. Clean
blocks should remain clean.
A simple cleaner policy is provided, which will clean (write back) all
dirty blocks in a cache. Useful for decommissioning a cache.
Migration throttling
--------------------
Migrating data between the origin and cache device uses bandwidth.
The user can set a throttle to prevent more than a certain amount of
migration occuring at any one time. Currently we're not taking any
account of normal io traffic going to the devices. More work needs
doing here to avoid migrating during those peak io moments.
For the time being, a message "migration_threshold <#sectors>"
can be used to set the maximum number of sectors being migrated,
the default being 204800 sectors (or 100MB).
Updating on-disk metadata
-------------------------
On-disk metadata is committed every time a REQ_SYNC or REQ_FUA bio is
written. If no such requests are made then commits will occur every
second. This means the cache behaves like a physical disk that has a
write cache (the same is true of the thin-provisioning target). If
power is lost you may lose some recent writes. The metadata should
always be consistent in spite of any crash.
The 'dirty' state for a cache block changes far too frequently for us
to keep updating it on the fly. So we treat it as a hint. In normal
operation it will be written when the dm device is suspended. If the
system crashes all cache blocks will be assumed dirty when restarted.
Per-block policy hints
----------------------
Policy plug-ins can store a chunk of data per cache block. It's up to
the policy how big this chunk is, but it should be kept small. Like the
dirty flags this data is lost if there's a crash so a safe fallback
value should always be possible.
For instance, the 'mq' policy, which is currently the default policy,
uses this facility to store the hit count of the cache blocks. If
there's a crash this information will be lost, which means the cache
may be less efficient until those hit counts are regenerated.
Policy hints affect performance, not correctness.
Policy messaging
----------------
Policies will have different tunables, specific to each one, so we
need a generic way of getting and setting these. Device-mapper
messages are used. Refer to cache-policies.txt.
Discard bitset resolution
-------------------------
We can avoid copying data during migration if we know the block has
been discarded. A prime example of this is when mkfs discards the
whole block device. We store a bitset tracking the discard state of
blocks. However, we allow this bitset to have a different block size
from the cache blocks. This is because we need to track the discard
state for all of the origin device (compare with the dirty bitset
which is just for the smaller cache device).
Target interface
================
Constructor
-----------
cache <metadata dev> <cache dev> <origin dev> <block size>
<#feature args> [<feature arg>]*
<policy> <#policy args> [policy args]*
metadata dev : fast device holding the persistent metadata
cache dev : fast device holding cached data blocks
origin dev : slow device holding original data blocks
block size : cache unit size in sectors
#feature args : number of feature arguments passed
feature args : writethrough. (The default is writeback.)
policy : the replacement policy to use
#policy args : an even number of arguments corresponding to
key/value pairs passed to the policy
policy args : key/value pairs passed to the policy
E.g. 'sequential_threshold 1024'
See cache-policies.txt for details.
Optional feature arguments are:
writethrough : write through caching that prohibits cache block
content from being different from origin block content.
Without this argument, the default behaviour is to write
back cache block contents later for performance reasons,
so they may differ from the corresponding origin blocks.
A policy called 'default' is always registered. This is an alias for
the policy we currently think is giving best all round performance.
As the default policy could vary between kernels, if you are relying on
the characteristics of a specific policy, always request it by name.
Status
------
<#used metadata blocks>/<#total metadata blocks> <#read hits> <#read misses>
<#write hits> <#write misses> <#demotions> <#promotions> <#blocks in cache>
<#dirty> <#features> <features>* <#core args> <core args>* <#policy args>
<policy args>*
#used metadata blocks : Number of metadata blocks used
#total metadata blocks : Total number of metadata blocks
#read hits : Number of times a READ bio has been mapped
to the cache
#read misses : Number of times a READ bio has been mapped
to the origin
#write hits : Number of times a WRITE bio has been mapped
to the cache
#write misses : Number of times a WRITE bio has been
mapped to the origin
#demotions : Number of times a block has been removed
from the cache
#promotions : Number of times a block has been moved to
the cache
#blocks in cache : Number of blocks resident in the cache
#dirty : Number of blocks in the cache that differ
from the origin
#feature args : Number of feature args to follow
feature args : 'writethrough' (optional)
#core args : Number of core arguments (must be even)
core args : Key/value pairs for tuning the core
e.g. migration_threshold
#policy args : Number of policy arguments to follow (must be even)
policy args : Key/value pairs
e.g. 'sequential_threshold 1024
Messages
--------
Policies will have different tunables, specific to each one, so we
need a generic way of getting and setting these. Device-mapper
messages are used. (A sysfs interface would also be possible.)
The message format is:
<key> <value>
E.g.
dmsetup message my_cache 0 sequential_threshold 1024
Examples
========
The test suite can be found here:
https://github.com/jthornber/thinp-test-suite
dmsetup create my_cache --table '0 41943040 cache /dev/mapper/metadata \
/dev/mapper/ssd /dev/mapper/origin 512 1 writeback default 0'
dmsetup create my_cache --table '0 41943040 cache /dev/mapper/metadata \
/dev/mapper/ssd /dev/mapper/origin 1024 1 writeback \
mq 4 sequential_threshold 1024 random_threshold 8'

24
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@ -0,0 +1,24 @@
* ARC700 incore Interrupt Controller
The core interrupt controller provides 32 prioritised interrupts (2 levels)
to ARC700 core.
Properties:
- compatible: "snps,arc700-intc"
- interrupt-controller: This is an interrupt controller.
- #interrupt-cells: Must be <1>.
Single Cell "interrupts" property of a device specifies the IRQ number
between 0 to 31
intc accessed via the special ARC AUX register interface, hence "reg" property
is not specified.
Example:
intc: interrupt-controller {
compatible = "snps,arc700-intc";
interrupt-controller;
#interrupt-cells = <1>;
};

6
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@ -0,0 +1,6 @@
Armadeus i.MX Platforms Device Tree Bindings
-----------------------------------------------
APF51: i.MX51 based module.
Required root node properties:
- compatible = "armadeus,imx51-apf51", "fsl,imx51";

8
Documentation/devicetree/bindings/arm/fsl.txt
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@ -5,6 +5,14 @@ i.MX23 Evaluation Kit
Required root node properties:
- compatible = "fsl,imx23-evk", "fsl,imx23";
i.MX25 Product Development Kit
Required root node properties:
- compatible = "fsl,imx25-pdk", "fsl,imx25";
i.MX27 Product Development Kit
Required root node properties:
- compatible = "fsl,imx27-pdk", "fsl,imx27";
i.MX28 Evaluation Kit
Required root node properties:
- compatible = "fsl,imx28-evk", "fsl,imx28";

1
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@ -171,6 +171,7 @@ clocks and IDs.
can_sel 156
can1_serial_gate 157
can1_ipg_gate 158
owire_gate 159
Examples (for mx53):

2
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@ -203,6 +203,8 @@ clocks and IDs.
pcie_ref 188
pcie_ref_125m 189
enet_ref 190
usbphy1_gate 191
usbphy2_gate 192
Examples:

72
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@ -3,59 +3,61 @@
Required properties:
- compatible: "snps,dma-spear1340"
- reg: Address range of the DMAC registers
- interrupt-parent: Should be the phandle for the interrupt controller
that services interrupts for this device
- interrupt: Should contain the DMAC interrupt number
- nr_channels: Number of channels supported by hardware
- is_private: The device channels should be marked as private and not for by the
general purpose DMA channel allocator. False if not passed.
- dma-channels: Number of channels supported by hardware
- dma-requests: Number of DMA request lines supported, up to 16
- dma-masters: Number of AHB masters supported by the controller
- #dma-cells: must be <3>
- chan_allocation_order: order of allocation of channel, 0 (default): ascending,
1: descending
- chan_priority: priority of channels. 0 (default): increase from chan 0->n, 1:
increase from chan n->0
- block_size: Maximum block size supported by the controller
- nr_masters: Number of AHB masters supported by the controller
- data_width: Maximum data width supported by hardware per AHB master
(0 - 8bits, 1 - 16bits, ..., 5 - 256bits)
- slave_info:
- bus_id: name of this device channel, not just a device name since
devices may have more than one channel e.g. "foo_tx". For using the
dw_generic_filter(), slave drivers must pass exactly this string as
param to filter function.
- cfg_hi: Platform-specific initializer for the CFG_HI register
- cfg_lo: Platform-specific initializer for the CFG_LO register
- src_master: src master for transfers on allocated channel.
- dst_master: dest master for transfers on allocated channel.
Optional properties:
- interrupt-parent: Should be the phandle for the interrupt controller
that services interrupts for this device
- is_private: The device channels should be marked as private and not for by the
general purpose DMA channel allocator. False if not passed.
Example:
dma@fc000000 {
dmahost: dma@fc000000 {
compatible = "snps,dma-spear1340";
reg = <0xfc000000 0x1000>;
interrupt-parent = <&vic1>;
interrupts = <12>;
nr_channels = <8>;
dma-channels = <8>;
dma-requests = <16>;
dma-masters = <2>;
#dma-cells = <3>;
chan_allocation_order = <1>;
chan_priority = <1>;
block_size = <0xfff>;
nr_masters = <2>;
data_width = <3 3 0 0>;
slave_info {
uart0-tx {
bus_id = "uart0-tx";
cfg_hi = <0x4000>; /* 0x8 << 11 */
cfg_lo = <0>;
src_master = <0>;
dst_master = <1>;
};
spi0-tx {
bus_id = "spi0-tx";
cfg_hi = <0x2000>; /* 0x4 << 11 */
cfg_lo = <0>;
src_master = <0>;
dst_master = <0>;
};
};
};
DMA clients connected to the Designware DMA controller must use the format
described in the dma.txt file, using a four-cell specifier for each channel.
The four cells in order are:
1. A phandle pointing to the DMA controller
2. The DMA request line number
3. Source master for transfers on allocated channel
4. Destination master for transfers on allocated channel
Example:
serial@e0000000 {
compatible = "arm,pl011", "arm,primecell";
reg = <0xe0000000 0x1000>;
interrupts = <0 35 0x4>;
status = "disabled";
dmas = <&dmahost 12 0 1>,
<&dmahost 13 0 1 0>;
dma-names = "rx", "rx";
};

82
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@ -0,0 +1,82 @@
* Meta External Trigger Controller Binding
This binding specifies what properties must be available in the device tree
representation of a Meta external trigger controller.
Required properties:
- compatible: Specifies the compatibility list for the interrupt controller.
The type shall be <string> and the value shall include "img,meta-intc".
- num-banks: Specifies the number of interrupt banks (each of which can
handle 32 interrupt sources).
- interrupt-controller: The presence of this property identifies the node
as an interupt controller. No property value shall be defined.
- #interrupt-cells: Specifies the number of cells needed to encode an
interrupt source. The type shall be a <u32> and the value shall be 2.
- #address-cells: Specifies the number of cells needed to encode an
address. The type shall be <u32> and the value shall be 0. As such,
'interrupt-map' nodes do not have to specify a parent unit address.
Optional properties:
- no-mask: The controller doesn't have any mask registers.
* Interrupt Specifier Definition
Interrupt specifiers consists of 2 cells encoded as follows:
- <1st-cell>: The interrupt-number that identifies the interrupt source.
- <2nd-cell>: The Linux interrupt flags containing level-sense information,
encoded as follows:
1 = edge triggered
4 = level-sensitive
* Examples
Example 1:
/*
* Meta external trigger block
*/
intc: intc {
// This is an interrupt controller node.
interrupt-controller;
// No address cells so that 'interrupt-map' nodes which
// reference this interrupt controller node do not need a parent
// address specifier.
#address-cells = <0>;
// Two cells to encode interrupt sources.
#interrupt-cells = <2>;
// Number of interrupt banks
num-banks = <2>;
// No HWMASKEXT is available (specify on Chorus2 and Comet ES1)
no-mask;
// Compatible with Meta hardware trigger block.
compatible = "img,meta-intc";
};
Example 2:
/*
* An interrupt generating device that is wired to a Meta external
* trigger block.
*/
uart1: uart@0x02004c00 {
// Interrupt source '5' that is level-sensitive.
// Note that there are only two cells as specified in the
// interrupt parent's '#interrupt-cells' property.
interrupts = <5 4 /* level */>;
// The interrupt controller that this device is wired to.
interrupt-parent = <&intc>;
};

47
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@ -0,0 +1,47 @@
MIPS CPU interrupt controller
On MIPS the mips_cpu_intc_init() helper can be used to initialize the 8 CPU
IRQs from a devicetree file and create a irq_domain for IRQ controller.
With the irq_domain in place we can describe how the 8 IRQs are wired to the
platforms internal interrupt controller cascade.
Below is an example of a platform describing the cascade inside the devicetree
and the code used to load it inside arch_init_irq().
Required properties:
- compatible : Should be "mti,cpu-interrupt-controller"
Example devicetree:
cpu-irq: cpu-irq@0 {
#address-cells = <0>;
interrupt-controller;
#interrupt-cells = <1>;
compatible = "mti,cpu-interrupt-controller";
};
intc: intc@200 {
compatible = "ralink,rt2880-intc";
reg = <0x200 0x100>;
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&cpu-irq>;
interrupts = <2>;
};
Example platform irq.c:
static struct of_device_id __initdata of_irq_ids[] = {
{ .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_intc_init },
{ .compatible = "ralink,rt2880-intc", .data = intc_of_init },
{},
};
void __init arch_init_irq(void)
{
of_irq_init(of_irq_ids);
}

16
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@ -0,0 +1,16 @@
Error location module
Required properties:
- compatible: Must be "ti,am33xx-elm"
- reg: physical base address and size of the registers map.
- interrupts: Interrupt number for the elm.
Optional properties:
- ti,hwmods: Name of the hwmod associated to the elm
Example:
elm: elm@0 {
compatible = "ti,am3352-elm";
reg = <0x48080000 0x2000>;
interrupts = <4>;
};

3
Documentation/devicetree/bindings/mtd/mtd-physmap.txt
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@ -26,6 +26,9 @@ file systems on embedded devices.
- linux,mtd-name: allow to specify the mtd name for retro capability with
physmap-flash drivers as boot loader pass the mtd partition via the old
device name physmap-flash.
- use-advanced-sector-protection: boolean to enable support for the
advanced sector protection (Spansion: PPB - Persistent Protection
Bits) locking.
For JEDEC compatible devices, the following additional properties
are defined:

16
Documentation/devicetree/bindings/serial/lantiq_asc.txt Normal file
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@ -0,0 +1,16 @@
Lantiq SoC ASC serial controller
Required properties:
- compatible : Should be "lantiq,asc"
- reg : Address and length of the register set for the device
- interrupts: the 3 (tx rx err) interrupt numbers. The interrupt specifier
depends on the interrupt-parent interrupt controller.
Example:
asc1: serial@E100C00 {
compatible = "lantiq,asc";
reg = <0xE100C00 0x400>;
interrupt-parent = <&icu0>;
interrupts = <112 113 114>;
};

18
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@ -0,0 +1,18 @@
* Dove Thermal
This driver is for Dove SoCs which contain a thermal sensor.
Required properties:
- compatible : "marvell,dove-thermal"
- reg : Address range of the thermal registers
The reg properties should contain two ranges. The first is for the
three Thermal Manager registers, while the second range contains the
Thermal Diode Control Registers.
Example:
thermal@10078 {
compatible = "marvell,dove-thermal";
reg = <0xd001c 0x0c>, <0xd005c 0x08>;
};

15
Documentation/devicetree/bindings/thermal/kirkwood-thermal.txt Normal file
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@ -0,0 +1,15 @@
* Kirkwood Thermal
This version is for Kirkwood 88F8262 & 88F6283 SoCs. Other kirkwoods
don't contain a thermal sensor.
Required properties:
- compatible : "marvell,kirkwood-thermal"
- reg : Address range of the thermal registers
Example:
thermal@10078 {
compatible = "marvell,kirkwood-thermal";
reg = <0x10078 0x4>;
};

29
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@ -0,0 +1,29 @@
* Renesas R-Car Thermal
Required properties:
- compatible : "renesas,rcar-thermal"
- reg : Address range of the thermal registers.
The 1st reg will be recognized as common register
if it has "interrupts".
Option properties:
- interrupts : use interrupt
Example (non interrupt support):
thermal@e61f0100 {
compatible = "renesas,rcar-thermal";
reg = <0xe61f0100 0x38>;
};
Example (interrupt support):
thermal@e61f0000 {
compatible = "renesas,rcar-thermal";
reg = <0xe61f0000 0x14
0xe61f0100 0x38
0xe61f0200 0x38
0xe61f0300 0x38>;
interrupts = <0 69 4>;
};

11
Documentation/devicetree/bindings/arm/armada-370-xp-timer.txt → Documentation/devicetree/bindings/timer/marvell,armada-370-xp-timer.txt
View File

@ -1,10 +1,13 @@
Marvell Armada 370 and Armada XP Global Timers
----------------------------------------------
Marvell Armada 370 and Armada XP Timers
---------------------------------------
Required properties:
- compatible: Should be "marvell,armada-370-xp-timer"
- interrupts: Should contain the list of Global Timer interrupts
- reg: Should contain the base address of the Global Timer registers
- interrupts: Should contain the list of Global Timer interrupts and
then local timer interrupts
- reg: Should contain location and length for timers register. First
pair for the Global Timer registers, second pair for the
local/private timers.
- clocks: clock driving the timer hardware
Optional properties:

19
Documentation/devicetree/bindings/w1/fsl-imx-owire.txt Normal file
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@ -0,0 +1,19 @@
* Freescale i.MX One wire bus master controller
Required properties:
- compatible : should be "fsl,imx21-owire"
- reg : Address and length of the register set for the device
Optional properties:
- clocks : phandle of clock that supplies the module (required if platform
clock bindings use device tree)
Example:
- From imx53.dtsi:
owire: owire@63fa4000 {
compatible = "fsl,imx53-owire", "fsl,imx21-owire";
reg = <0x63fa4000 0x4000>;
clocks = <&clks 159>;
status = "disabled";
};

9
Documentation/devicetree/bindings/watchdog/atmel-at91rm9200-wdt.txt Normal file
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@ -0,0 +1,9 @@
Atmel AT91RM9200 System Timer Watchdog
Required properties:
- compatible: must be "atmel,at91sam9260-wdt".
Example:
watchdog@fffffd00 {
compatible = "atmel,at91rm9200-wdt";
};

4
Documentation/devicetree/bindings/watchdog/atmel-wdt.txt
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@ -7,9 +7,13 @@ Required properties:
- reg: physical base address of the controller and length of memory mapped
region.
Optional properties:
- timeout-sec: contains the watchdog timeout in seconds.
Example:
watchdog@fffffd40 {
compatible = "atmel,at91sam9260-wdt";
reg = <0xfffffd40 0x10>;
timeout-sec = <10>;
};

5
Documentation/devicetree/bindings/watchdog/marvel.txt
View File

@ -5,10 +5,15 @@ Required Properties:
- Compatibility : "marvell,orion-wdt"
- reg : Address of the timer registers
Optional properties:
- timeout-sec : Contains the watchdog timeout in seconds
Example:
wdt@20300 {
compatible = "marvell,orion-wdt";
reg = <0x20300 0x28>;
timeout-sec = <10>;
status = "okay";
};

4
Documentation/devicetree/bindings/watchdog/pnx4008-wdt.txt
View File

@ -5,9 +5,13 @@ Required properties:
- reg: physical base address of the controller and length of memory mapped
region.
Optional properties:
- timeout-sec: contains the watchdog timeout in seconds.
Example:
watchdog@4003C000 {
compatible = "nxp,pnx4008-wdt";
reg = <0x4003C000 0x1000>;
timeout-sec = <10>;
};

13
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@ -0,0 +1,13 @@
* Qualcomm Atheros AR7130 Watchdog Timer (WDT) Controller
Required properties:
- compatible: must be "qca,ar7130-wdt"
- reg: physical base address of the controller and length of memory mapped
region.
Example:
wdt@18060008 {
compatible = "qca,ar9330-wdt", "qca,ar7130-wdt";
reg = <0x18060008 0x8>;
};

3
Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
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@ -9,3 +9,6 @@ Required properties:
- reg : base physical address of the controller and length of memory mapped
region.
- interrupts : interrupt number to the cpu.
Optional properties:
- timeout-sec : contains the watchdog timeout in seconds.

6
Documentation/dma-buf-sharing.txt
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@ -302,7 +302,11 @@ Access to a dma_buf from the kernel context involves three steps:
void dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr)
The vmap call can fail if there is no vmap support in the exporter, or if it
runs out of vmalloc space. Fallback to kmap should be implemented.
runs out of vmalloc space. Fallback to kmap should be implemented. Note that
the dma-buf layer keeps a reference count for all vmap access and calls down
into the exporter's vmap function only when no vmapping exists, and only
unmaps it once. Protection against concurrent vmap/vunmap calls is provided
by taking the dma_buf->lock mutex.
3. Finish access

23
Documentation/kbuild/kconfig-language.txt
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@ -388,26 +388,3 @@ config FOO
depends on BAR && m
limits FOO to module (=m) or disabled (=n).
Kconfig symbol existence
~~~~~~~~~~~~~~~~~~~~~~~~
The following two methods produce the same kconfig symbol dependencies
but differ greatly in kconfig symbol existence (production) in the
generated config file.
case 1:
config FOO
tristate "about foo"
depends on BAR
vs. case 2:
if BAR
config FOO
tristate "about foo"
endif
In case 1, the symbol FOO will always exist in the config file (given
no other dependencies). In case 2, the symbol FOO will only exist in
the config file if BAR is enabled.

6
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@ -46,6 +46,12 @@ KCONFIG_OVERWRITECONFIG
If you set KCONFIG_OVERWRITECONFIG in the environment, Kconfig will not
break symlinks when .config is a symlink to somewhere else.
CONFIG_
--------------------------------------------------
If you set CONFIG_ in the environment, Kconfig will prefix all symbols
with its value when saving the configuration, instead of using the default,
"CONFIG_".
______________________________________________________________________
Environment variables for '{allyes/allmod/allno/rand}config'

45
Documentation/kernel-parameters.txt
View File

@ -564,6 +564,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
UART at the specified I/O port or MMIO address,
switching to the matching ttyS device later. The
options are the same as for ttyS, above.
hvc<n> Use the hypervisor console device <n>. This is for
both Xen and PowerPC hypervisors.
If the device connected to the port is not a TTY but a braille
device, prepend "brl," before the device type, for instance
@ -757,6 +759,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
earlyprintk= [X86,SH,BLACKFIN]
earlyprintk=vga
earlyprintk=xen
earlyprintk=serial[,ttySn[,baudrate]]
earlyprintk=ttySn[,baudrate]
earlyprintk=dbgp[debugController#]
@ -774,6 +777,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
The VGA output is eventually overwritten by the real
console.
The xen output can only be used by Xen PV guests.
ekgdboc= [X86,KGDB] Allow early kernel console debugging
ekgdboc=kbd
@ -973,6 +978,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
If specified, z/VM IUCV HVC accepts connections
from listed z/VM user IDs only.
hwthread_map= [METAG] Comma-separated list of Linux cpu id to
hardware thread id mappings.
Format: <cpu>:<hwthread>
keep_bootcon [KNL]
Do not unregister boot console at start. This is only
useful for debugging when something happens in the window
@ -1640,42 +1649,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
that the amount of memory usable for all allocations
is not too small.
movablemem_map=acpi
[KNL,X86,IA-64,PPC] This parameter is similar to
memmap except it specifies the memory map of
ZONE_MOVABLE.
This option inform the kernel to use Hot Pluggable bit
in flags from SRAT from ACPI BIOS to determine which
memory devices could be hotplugged. The corresponding
memory ranges will be set as ZONE_MOVABLE.
NOTE: Whatever node the kernel resides in will always
be un-hotpluggable.
movablemem_map=nn[KMG]@ss[KMG]
[KNL,X86,IA-64,PPC] This parameter is similar to
memmap except it specifies the memory map of
ZONE_MOVABLE.
If user specifies memory ranges, the info in SRAT will
be ingored. And it works like the following:
- If more ranges are all within one node, then from
lowest ss to the end of the node will be ZONE_MOVABLE.
- If a range is within a node, then from ss to the end
of the node will be ZONE_MOVABLE.
- If a range covers two or more nodes, then from ss to
the end of the 1st node will be ZONE_MOVABLE, and all
the rest nodes will only have ZONE_MOVABLE.
If memmap is specified at the same time, the
movablemem_map will be limited within the memmap
areas. If kernelcore or movablecore is also specified,
movablemem_map will have higher priority to be
satisfied. So the administrator should be careful that
the amount of movablemem_map areas are not too large.
Otherwise kernel won't have enough memory to start.
NOTE: We don't stop users specifying the node the
kernel resides in as hotpluggable so that this
option can be used as a workaround of firmware
bugs.
MTD_Partition= [MTD]
Format: <name>,<region-number>,<size>,<offset>

4
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@ -0,0 +1,4 @@
00-INDEX
- this file
kernel-ABI.txt
- Documents metag ABI details

256
Documentation/metag/kernel-ABI.txt Normal file
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@ -0,0 +1,256 @@
==========================
KERNEL ABIS FOR METAG ARCH
==========================
This document describes the Linux ABIs for the metag architecture, and has the
following sections:
(*) Outline of registers
(*) Userland registers
(*) Kernel registers
(*) System call ABI
(*) Calling conventions
====================
OUTLINE OF REGISTERS
====================
The main Meta core registers are arranged in units:
UNIT Type DESCRIPTION GP EXT PRIV GLOBAL
======= ======= =============== ======= ======= ======= =======
CT Special Control unit
D0 General Data unit 0 0-7 8-15 16-31 16-31
D1 General Data unit 1 0-7 8-15 16-31 16-31
A0 General Address unit 0 0-3 4-7 8-15 8-15
A1 General Address unit 1 0-3 4-7 8-15 8-15
PC Special PC unit 0 1
PORT Special Ports
TR Special Trigger unit 0-7
TT Special Trace unit 0-5
FX General FP unit 0-15
GP registers form part of the main context.
Extended context registers (EXT) may not be present on all hardware threads and
can be context switched if support is enabled and the appropriate bits are set
in e.g. the D0.8 register to indicate what extended state to preserve.
Global registers are shared between threads and are privilege protected.
See arch/metag/include/asm/metag_regs.h for definitions relating to core
registers and the fields and bits they contain. See the TRMs for further details
about special registers.
Several special registers are preserved in the main context, these are the
interesting ones:
REG (ALIAS) PURPOSE
======================= ===============================================
CT.1 (TXMODE) Processor mode bits (particularly for DSP)
CT.2 (TXSTATUS) Condition flags and LSM_STEP (MGET/MSET step)
CT.3 (TXRPT) Branch repeat counter
PC.0 (PC) Program counter
Some of the general registers have special purposes in the ABI and therefore
have aliases:
D0 REG (ALIAS) PURPOSE D1 REG (ALIAS) PURPOSE
=============== =============== =============== =======================
D0.0 (D0Re0) 32bit result D1.0 (D1Re0) Top half of 64bit result
D0.1 (D0Ar6) Argument 6 D1.1 (D1Ar5) Argument 5
D0.2 (D0Ar4) Argument 4 D1.2 (D1Ar3) Argument 3
D0.3 (D0Ar2) Argument 2 D1.3 (D1Ar1) Argument 1
D0.4 (D0FrT) Frame temp D1.4 (D1RtP) Return pointer
D0.5 Call preserved D1.5 Call preserved
D0.6 Call preserved D1.6 Call preserved
D0.7 Call preserved D1.7 Call preserved
A0 REG (ALIAS) PURPOSE A1 REG (ALIAS) PURPOSE
=============== =============== =============== =======================
A0.0 (A0StP) Stack pointer A1.0 (A1GbP) Global base pointer
A0.1 (A0FrP) Frame pointer A1.1 (A1LbP) Local base pointer
A0.2 A1.2
A0.3 A1.3
==================
USERLAND REGISTERS
==================
All the general purpose D0, D1, A0, A1 registers are preserved when entering the
kernel (including asynchronous events such as interrupts and timer ticks) except
the following which have special purposes in the ABI:
REGISTERS WHEN STATUS PURPOSE
=============== ======= =============== ===============================
D0.8 DSP Preserved ECH, determines what extended
DSP state to preserve.
A0.0 (A0StP) ALWAYS Preserved Stack >= A0StP may be clobbered
at any time by the creation of a
signal frame.
A1.0 (A1GbP) SMP Clobbered Used as temporary for loading
kernel stack pointer and saving
core context.
A0.15 !SMP Protected Stores kernel stack pointer.
A1.15 ALWAYS Protected Stores kernel base pointer.
On UP A0.15 is used to store the kernel stack pointer for storing the userland
context. A0.15 is global between hardware threads though which means it cannot
be used on SMP for this purpose. Since no protected local registers are
available A1GbP is reserved for use as a temporary to allow a percpu stack
pointer to be loaded for storing the rest of the context.
================
KERNEL REGISTERS
================
When in the kernel the following registers have special purposes in the ABI:
REGISTERS WHEN STATUS PURPOSE
=============== ======= =============== ===============================
A0.0 (A0StP) ALWAYS Preserved Stack >= A0StP may be clobbered
at any time by the creation of
an irq signal frame.
A1.0 (A1GbP) ALWAYS Preserved Reserved (kernel base pointer).
===============
SYSTEM CALL ABI
===============
When a system call is made, the following registers are effective:
REGISTERS CALL RETURN
=============== ======================= ===============================
D0.0 (D0Re0) Return value (or -errno)
D1.0 (D1Re0) System call number Clobbered
D0.1 (D0Ar6) Syscall arg #6 Preserved
D1.1 (D1Ar5) Syscall arg #5 Preserved
D0.2 (D0Ar4) Syscall arg #4 Preserved
D1.2 (D1Ar3) Syscall arg #3 Preserved
D0.3 (D0Ar2) Syscall arg #2 Preserved
D1.3 (D1Ar1) Syscall arg #1 Preserved
Due to the limited number of argument registers and some system calls with badly
aligned 64-bit arguments, 64-bit values are always packed in consecutive
arguments, even if this is contrary to the normal calling conventions (where the
two halves would go in a matching pair of data registers).
For example fadvise64_64 usually has the signature:
long sys_fadvise64_64(i32 fd, i64 offs, i64 len, i32 advice);
But for metag fadvise64_64 is wrapped so that the 64-bit arguments are packed:
long sys_fadvise64_64_metag(i32 fd, i32 offs_lo,
i32 offs_hi, i32 len_lo,
i32 len_hi, i32 advice)
So the arguments are packed in the registers like this:
D0 REG (ALIAS) VALUE D1 REG (ALIAS) VALUE
=============== =============== =============== =======================
D0.1 (D0Ar6) advice D1.1 (D1Ar5) hi(len)
D0.2 (D0Ar4) lo(len) D1.2 (D1Ar3) hi(offs)
D0.3 (D0Ar2) lo(offs) D1.3 (D1Ar1) fd
===================
CALLING CONVENTIONS
===================
These calling conventions apply to both user and kernel code. The stack grows
from low addresses to high addresses in the metag ABI. The stack pointer (A0StP)
should always point to the next free address on the stack and should at all
times be 64-bit aligned. The following registers are effective at the point of a
call:
REGISTERS CALL RETURN
=============== ======================= ===============================
D0.0 (D0Re0) 32bit return value
D1.0 (D1Re0) Upper half of 64bit return value
D0.1 (D0Ar6) 32bit argument #6 Clobbered
D1.1 (D1Ar5) 32bit argument #5 Clobbered
D0.2 (D0Ar4) 32bit argument #4 Clobbered
D1.2 (D1Ar3) 32bit argument #3 Clobbered
D0.3 (D0Ar2) 32bit argument #2 Clobbered
D1.3 (D1Ar1) 32bit argument #1 Clobbered
D0.4 (D0FrT) Clobbered
D1.4 (D1RtP) Return pointer Clobbered
D{0-1}.{5-7} Preserved
A0.0 (A0StP) Stack pointer Preserved
A1.0 (A0GbP) Preserved
A0.1 (A0FrP) Frame pointer Preserved
A1.1 (A0LbP) Preserved
A{0-1},{2-3} Clobbered
64-bit arguments are placed in matching pairs of registers (i.e. the same
register number in both D0 and D1 units), with the least significant half in D0
and the most significant half in D1, leaving a gap where necessary. Futher
arguments are stored on the stack in reverse order (earlier arguments at higher
addresses):
ADDRESS 0 1 2 3 4 5 6 7
=============== ===== ===== ===== ===== ===== ===== ===== =====
A0StP -->
A0StP-0x08 32bit argument #8 32bit argument #7
A0StP-0x10 32bit argument #10 32bit argument #9
Function prologues tend to look a bit like this:
/* If frame pointer in use, move it to frame temp register so it can be
easily pushed onto stack */
MOV D0FrT,A0FrP
/* If frame pointer in use, set it to stack pointer */
ADD A0FrP,A0StP,#0
/* Preserve D0FrT, D1RtP, D{0-1}.{5-7} on stack, incrementing A0StP */
MSETL [A0StP++],D0FrT,D0.5,D0.6,D0.7
/* Allocate some stack space for local variables */
ADD A0StP,A0StP,#0x10
At this point the stack would look like this:
ADDRESS 0 1 2 3 4 5 6 7
=============== ===== ===== ===== ===== ===== ===== ===== =====
A0StP -->
A0StP-0x08
A0StP-0x10
A0StP-0x18 Old D0.7 Old D1.7
A0StP-0x20 Old D0.6 Old D1.6
A0StP-0x28 Old D0.5 Old D1.5
A0FrP --> Old A0FrP (frame ptr) Old D1RtP (return ptr)
A0FrP-0x08 32bit argument #8 32bit argument #7
A0FrP-0x10 32bit argument #10 32bit argument #9
Function epilogues tend to differ depending on the use of a frame pointer. An
example of a frame pointer epilogue:
/* Restore D0FrT, D1RtP, D{0-1}.{5-7} from stack, incrementing A0FrP */
MGETL D0FrT,D0.5,D0.6,D0.7,[A0FrP++]
/* Restore stack pointer to where frame pointer was before increment */
SUB A0StP,A0FrP,#0x20
/* Restore frame pointer from frame temp */
MOV A0FrP,D0FrT
/* Return to caller via restored return pointer */
MOV PC,D1RtP
If the function hasn't touched the frame pointer, MGETL cannot be safely used
with A0StP as it always increments and that would expose the stack to clobbering
by interrupts (kernel) or signals (user). Therefore it's common to see the MGETL
split into separate GETL instructions:
/* Restore D0FrT, D1RtP, D{0-1}.{5-7} from stack */
GETL D0FrT,D1RtP,[A0StP+#-0x30]
GETL D0.5,D1.5,[A0StP+#-0x28]
GETL D0.6,D1.6,[A0StP+#-0x20]
GETL D0.7,D1.7,[A0StP+#-0x18]
/* Restore stack pointer */
SUB A0StP,A0StP,#0x30
/* Return to caller via restored return pointer */
MOV PC,D1RtP

9
Documentation/scsi/ChangeLog.megaraid_sas
View File

@ -1,3 +1,12 @@
Release Date : Sat. Feb 9, 2013 17:00:00 PST 2013 -
(emaild-id:megaraidlinux@lsi.com)
Adam Radford
Current Version : 06.506.00.00-rc1
Old Version : 06.504.01.00-rc1
1. Add 4k FastPath DIF support.
2. Dont load DevHandle unless FastPath enabled.
3. Version and Changelog update.
-------------------------------------------------------------------------------
Release Date : Mon. Oct 1, 2012 17:00:00 PST 2012 -
(emaild-id:megaraidlinux@lsi.com)
Adam Radford

53
Documentation/thermal/exynos_thermal_emulation Normal file
View File

@ -0,0 +1,53 @@
EXYNOS EMULATION MODE
========================
Copyright (C) 2012 Samsung Electronics
Written by Jonghwa Lee <jonghwa3.lee@samsung.com>
Description
-----------
Exynos 4x12 (4212, 4412) and 5 series provide emulation mode for thermal management unit.
Thermal emulation mode supports software debug for TMU's operation. User can set temperature
manually with software code and TMU will read current temperature from user value not from
sensor's value.
Enabling CONFIG_EXYNOS_THERMAL_EMUL option will make this support in available.
When it's enabled, sysfs node will be created under
/sys/bus/platform/devices/'exynos device name'/ with name of 'emulation'.
The sysfs node, 'emulation', will contain value 0 for the initial state. When you input any
temperature you want to update to sysfs node, it automatically enable emulation mode and
current temperature will be changed into it.
(Exynos also supports user changable delay time which would be used to delay of
changing temperature. However, this node only uses same delay of real sensing time, 938us.)
Exynos emulation mode requires synchronous of value changing and enabling. It means when you
want to update the any value of delay or next temperature, then you have to enable emulation
mode at the same time. (Or you have to keep the mode enabling.) If you don't, it fails to
change the value to updated one and just use last succeessful value repeatedly. That's why
this node gives users the right to change termerpature only. Just one interface makes it more
simply to use.
Disabling emulation mode only requires writing value 0 to sysfs node.
TEMP 120 |
|
100 |
|
80 |
| +-----------
60 | | |
| +-------------| |
40 | | | |
| | | |
20 | | | +----------
| | | | |
0 |______________|_____________|__________|__________|_________
A A A A TIME
|<----->| |<----->| |<----->| |
| 938us | | | | | |
emulation : 0 50 | 70 | 20 | 0
current temp : sensor 50 70 20 sensor

307
Documentation/thermal/intel_powerclamp.txt Normal file
View File

@ -0,0 +1,307 @@
=======================
INTEL POWERCLAMP DRIVER
=======================
By: Arjan van de Ven <arjan@linux.intel.com>
Jacob Pan <jacob.jun.pan@linux.intel.com>
Contents:
(*) Introduction
- Goals and Objectives
(*) Theory of Operation
- Idle Injection
- Calibration
(*) Performance Analysis
- Effectiveness and Limitations
- Power vs Performance
- Scalability
- Calibration
- Comparison with Alternative Techniques
(*) Usage and Interfaces
- Generic Thermal Layer (sysfs)
- Kernel APIs (TBD)
============
INTRODUCTION
============
Consider the situation where a system’s power consumption must be
reduced at runtime, due to power budget, thermal constraint, or noise
level, and where active cooling is not preferred. Software managed
passive power reduction must be performed to prevent the hardware
actions that are designed for catastrophic scenarios.
Currently, P-states, T-states (clock modulation), and CPU offlining
are used for CPU throttling.
On Intel CPUs, C-states provide effective power reduction, but so far
they’re only used opportunistically, based on workload. With the
development of intel_powerclamp driver, the method of synchronizing
idle injection across all online CPU threads was introduced. The goal
is to achieve forced and controllable C-state residency.
Test/Analysis has been made in the areas of power, performance,
scalability, and user experience. In many cases, clear advantage is
shown over taking the CPU offline or modulating the CPU clock.
===================
THEORY OF OPERATION
===================
Idle Injection
--------------
On modern Intel processors (Nehalem or later), package level C-state
residency is available in MSRs, thus also available to the kernel.
These MSRs are:
#define MSR_PKG_C2_RESIDENCY 0x60D
#define MSR_PKG_C3_RESIDENCY 0x3F8
#define MSR_PKG_C6_RESIDENCY 0x3F9
#define MSR_PKG_C7_RESIDENCY 0x3FA
If the kernel can also inject idle time to the system, then a
closed-loop control system can be established that manages package
level C-state. The intel_powerclamp driver is conceived as such a
control system, where the target set point is a user-selected idle
ratio (based on power reduction), and the error is the difference
between the actual package level C-state residency ratio and the target idle
ratio.
Injection is controlled by high priority kernel threads, spawned for
each online CPU.
These kernel threads, with SCHED_FIFO class, are created to perform
clamping actions of controlled duty ratio and duration. Each per-CPU
thread synchronizes its idle time and duration, based on the rounding
of jiffies, so accumulated errors can be prevented to avoid a jittery
effect. Threads are also bound to the CPU such that they cannot be
migrated, unless the CPU is taken offline. In this case, threads
belong to the offlined CPUs will be terminated immediately.
Running as SCHED_FIFO and relatively high priority, also allows such
scheme to work for both preemptable and non-preemptable kernels.
Alignment of idle time around jiffies ensures scalability for HZ
values. This effect can be better visualized using a Perf timechart.
The following diagram shows the behavior of kernel thread
kidle_inject/cpu. During idle injection, it runs monitor/mwait idle
for a given "duration", then relinquishes the CPU to other tasks,
until the next time interval.
The NOHZ schedule tick is disabled during idle time, but interrupts
are not masked. Tests show that the extra wakeups from scheduler tick
have a dramatic impact on the effectiveness of the powerclamp driver
on large scale systems (Westmere system with 80 processors).
CPU0
____________ ____________
kidle_inject/0 | sleep | mwait | sleep |
_________| |________| |_______
duration
CPU1
____________ ____________
kidle_inject/1 | sleep | mwait | sleep |
_________| |________| |_______
^
|
|
roundup(jiffies, interval)
Only one CPU is allowed to collect statistics and update global
control parameters. This CPU is referred to as the controlling CPU in
this document. The controlling CPU is elected at runtime, with a
policy that favors BSP, taking into account the possibility of a CPU
hot-plug.
In terms of dynamics of the idle control system, package level idle
time is considered largely as a non-causal system where its behavior
cannot be based on the past or current input. Therefore, the
intel_powerclamp driver attempts to enforce the desired idle time
instantly as given input (target idle ratio). After injection,
powerclamp moniors the actual idle for a given time window and adjust
the next injection accordingly to avoid over/under correction.
When used in a causal control system, such as a temperature control,
it is up to the user of this driver to implement algorithms where
past samples and outputs are included in the feedback. For example, a
PID-based thermal controller can use the powerclamp driver to
maintain a desired target temperature, based on integral and
derivative gains of the past samples.
Calibration
-----------
During scalability testing, it is observed that synchronized actions
among CPUs become challenging as the number of cores grows. This is
also true for the ability of a system to enter package level C-states.
To make sure the intel_powerclamp driver scales well, online
calibration is implemented. The goals for doing such a calibration
are:
a) determine the effective range of idle injection ratio
b) determine the amount of compensation needed at each target ratio
Compensation to each target ratio consists of two parts:
a) steady state error compensation
This is to offset the error occurring when the system can
enter idle without extra wakeups (such as external interrupts).
b) dynamic error compensation
When an excessive amount of wakeups occurs during idle, an
additional idle ratio can be added to quiet interrupts, by
slowing down CPU activities.
A debugfs file is provided for the user to examine compensation
progress and results, such as on a Westmere system.
[jacob@nex01 ~]$ cat
/sys/kernel/debug/intel_powerclamp/powerclamp_calib
controlling cpu: 0
pct confidence steady dynamic (compensation)
0 0 0 0
1 1 0 0
2 1 1 0
3 3 1 0
4 3 1 0
5 3 1 0
6 3 1 0
7 3 1 0
8 3 1 0
...
30 3 2 0
31 3 2 0
32 3 1 0
33 3 2 0
34 3 1 0
35 3 2 0
36 3 1 0
37 3 2 0
38 3 1 0
39 3 2 0
40 3 3 0
41 3 1 0
42 3 2 0
43 3 1 0
44 3 1 0
45 3 2 0
46 3 3 0
47 3 0 0
48 3 2 0
49 3 3 0
Calibration occurs during runtime. No offline method is available.
Steady state compensation is used only when confidence levels of all
adjacent ratios have reached satisfactory level. A confidence level
is accumulated based on clean data collected at runtime. Data
collected during a period without extra interrupts is considered
clean.
To compensate for excessive amounts of wakeup during idle, additional
idle time is injected when such a condition is detected. Currently,
we have a simple algorithm to double the injection ratio. A possible
enhancement might be to throttle the offending IRQ, such as delaying
EOI for level triggered interrupts. But it is a challenge to be
non-intrusive to the scheduler or the IRQ core code.
CPU Online/Offline
------------------
Per-CPU kernel threads are started/stopped upon receiving
notifications of CPU hotplug activities. The intel_powerclamp driver
keeps track of clamping kernel threads, even after they are migrated
to other CPUs, after a CPU offline event.
=====================
Performance Analysis
=====================
This section describes the general performance data collected on
multiple systems, including Westmere (80P) and Ivy Bridge (4P, 8P).
Effectiveness and Limitations
-----------------------------
The maximum range that idle injection is allowed is capped at 50
percent. As mentioned earlier, since interrupts are allowed during
forced idle time, excessive interrupts could result in less
effectiveness. The extreme case would be doing a ping -f to generated
flooded network interrupts without much CPU acknowledgement. In this
case, little can be done from the idle injection threads. In most
normal cases, such as scp a large file, applications can be throttled
by the powerclamp driver, since slowing down the CPU also slows down
network protocol processing, which in turn reduces interrupts.
When control parameters change at runtime by the controlling CPU, it
may take an additional period for the rest of the CPUs to catch up
with the changes. During this time, idle injection is out of sync,
thus not able to enter package C- states at the expected ratio. But
this effect is minor, in that in most cases change to the target
ratio is updated much less frequently than the idle injection
frequency.
Scalability
-----------
Tests also show a minor, but measurable, difference between the 4P/8P
Ivy Bridge system and the 80P Westmere server under 50% idle ratio.
More compensation is needed on Westmere for the same amount of
target idle ratio. The compensation also increases as the idle ratio
gets larger. The above reason constitutes the need for the
calibration code.
On the IVB 8P system, compared to an offline CPU, powerclamp can
achieve up to 40% better performance per watt. (measured by a spin
counter summed over per CPU counting threads spawned for all running
CPUs).
====================
Usage and Interfaces
====================
The powerclamp driver is registered to the generic thermal layer as a
cooling device. Currently, it’s not bound to any thermal zones.
jacob@chromoly:/sys/class/thermal/cooling_device14$ grep . *
cur_state:0
max_state:50
type:intel_powerclamp
Example usage:
- To inject 25% idle time
$ sudo sh -c "echo 25 > /sys/class/thermal/cooling_device80/cur_state
"
If the system is not busy and has more than 25% idle time already,
then the powerclamp driver will not start idle injection. Using Top
will not show idle injection kernel threads.
If the system is busy (spin test below) and has less than 25% natural
idle time, powerclamp kernel threads will do idle injection, which
appear running to the scheduler. But the overall system idle is still
reflected. In this example, 24.1% idle is shown. This helps the
system admin or user determine the cause of slowdown, when a
powerclamp driver is in action.
Tasks: 197 total, 1 running, 196 sleeping, 0 stopped, 0 zombie
Cpu(s): 71.2%us, 4.7%sy, 0.0%ni, 24.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3943228k total, 1689632k used, 2253596k free, 74960k buffers
Swap: 4087804k total, 0k used, 4087804k free, 945336k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3352 jacob 20 0 262m 644 428 S 286 0.0 0:17.16 spin
3341 root -51 0 0 0 0 D 25 0.0 0:01.62 kidle_inject/0
3344 root -51 0 0 0 0 D 25 0.0 0:01.60 kidle_inject/3
3342 root -51 0 0 0 0 D 25 0.0 0:01.61 kidle_inject/1
3343 root -51 0 0 0 0 D 25 0.0 0:01.60 kidle_inject/2
2935 jacob 20 0 696m 125m 35m S 5 3.3 0:31.11 firefox
1546 root 20 0 158m 20m 6640 S 3 0.5 0:26.97 Xorg
2100 jacob 20 0 1223m 88m 30m S 3 2.3 0:23.68 compiz
Tests have shown that by using the powerclamp driver as a cooling
device, a PID based userspace thermal controller can manage to
control CPU temperature effectively, when no other thermal influence
is added. For example, a UltraBook user can compile the kernel under
certain temperature (below most active trip points).

18
Documentation/thermal/sysfs-api.txt
View File

@ -55,6 +55,8 @@ temperature) and throttle appropriate devices.
.get_trip_type: get the type of certain trip point.
.get_trip_temp: get the temperature above which the certain trip point
will be fired.
.set_emul_temp: set the emulation temperature which helps in debugging
different threshold temperature points.
1.1.2 void thermal_zone_device_unregister(struct thermal_zone_device *tz)
@ -153,6 +155,7 @@ Thermal zone device sys I/F, created once it's registered:
|---trip_point_[0-*]_temp: Trip point temperature
|---trip_point_[0-*]_type: Trip point type
|---trip_point_[0-*]_hyst: Hysteresis value for this trip point
|---emul_temp: Emulated temperature set node
Thermal cooling device sys I/F, created once it's registered:
/sys/class/thermal/cooling_device[0-*]:
@ -252,6 +255,16 @@ passive
Valid values: 0 (disabled) or greater than 1000
RW, Optional
emul_temp
Interface to set the emulated temperature method in thermal zone
(sensor). After setting this temperature, the thermal zone may pass
this temperature to platform emulation function if registered or
cache it locally. This is useful in debugging different temperature
threshold and its associated cooling action. This is write only node
and writing 0 on this node should disable emulation.
Unit: millidegree Celsius
WO, Optional
*****************************
* Cooling device attributes *
*****************************
@ -329,8 +342,9 @@ The framework includes a simple notification mechanism, in the form of a
netlink event. Netlink socket initialization is done during the _init_
of the framework. Drivers which intend to use the notification mechanism
just need to call thermal_generate_netlink_event() with two arguments viz
(originator, event). Typically the originator will be an integer assigned
to a thermal_zone_device when it registers itself with the framework. The
(originator, event). The originator is a pointer to struct thermal_zone_device
from where the event has been originated. An integer which represents the
thermal zone device will be used in the message to identify the zone. The
event will be one of:{THERMAL_AUX0, THERMAL_AUX1, THERMAL_CRITICAL,
THERMAL_DEV_FAULT}. Notification can be sent when the current temperature
crosses any of the configured thresholds.

14
Documentation/watchdog/watchdog-kernel-api.txt
View File

@ -1,6 +1,6 @@
The Linux WatchDog Timer Driver Core kernel API.
===============================================
Last reviewed: 22-May-2012
Last reviewed: 12-Feb-2013
Wim Van Sebroeck <wim@iguana.be>
@ -212,3 +212,15 @@ driver specific data to and a pointer to the data itself.
The watchdog_get_drvdata function allows you to retrieve driver specific data.
The argument of this function is the watchdog device where you want to retrieve
data from. The function returns the pointer to the driver specific data.
To initialize the timeout field, the following function can be used:
extern int watchdog_init_timeout(struct watchdog_device *wdd,
unsigned int timeout_parm, struct device *dev);
The watchdog_init_timeout function allows you to initialize the timeout field
using the module timeout parameter or by retrieving the timeout-sec property from
the device tree (if the module timeout parameter is invalid). Best practice is
to set the default timeout value as timeout value in the watchdog_device and
then use this function to set the user "preferred" timeout value.
This routine returns zero on success and a negative errno code for failure.

53
MAINTAINERS
View File

@ -97,12 +97,13 @@ Descriptions of section entries:
X: net/ipv6/
matches all files in and below net excluding net/ipv6/
K: Keyword perl extended regex pattern to match content in a
patch or file. For instance:
patch or file, or an affected filename. For instance:
K: of_get_profile
matches patches or files that contain "of_get_profile"
matches patch or file content, or filenames, that contain
"of_get_profile"
K: \b(printk|pr_(info|err))\b
matches patches or files that contain one or more of the words
printk, pr_info or pr_err
matches patch or file content, or filenames, that contain one or
more of the words printk, pr_info or pr_err
One regex pattern per line. Multiple K: lines acceptable.
Note: For the hard of thinking, this list is meant to remain in alphabetical
@ -1799,7 +1800,8 @@ F: drivers/bcma/
F: include/linux/bcma/
BROCADE BFA FC SCSI DRIVER
M: Krishna C Gudipati <kgudipat@brocade.com>
M: Anil Gurumurthy <agurumur@brocade.com>
M: Vijaya Mohan Guvva <vmohan@brocade.com>
L: linux-scsi@vger.kernel.org
S: Supported
F: drivers/scsi/bfa/
@ -2073,8 +2075,8 @@ S: Maintained
F: include/linux/clk.h
CISCO FCOE HBA DRIVER
M: Abhijeet Joglekar <abjoglek@cisco.com>
M: Venkata Siva Vijayendra Bhamidipati <vbhamidi@cisco.com>
M: Hiral Patel <hiralpat@cisco.com>
M: Suma Ramars <sramars@cisco.com>
M: Brian Uchino <buchino@cisco.com>
L: linux-scsi@vger.kernel.org
S: Supported
@ -2902,6 +2904,13 @@ W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/e7xxx_edac.c
EDAC-GHES
M: Mauro Carvalho Chehab <mchehab@redhat.com>
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/ghes-edac.c
EDAC-I82443BXGX
M: Tim Small <tim@buttersideup.com>
L: linux-edac@vger.kernel.org
@ -5195,6 +5204,18 @@ F: drivers/mtd/
F: include/linux/mtd/
F: include/uapi/mtd/
METAG ARCHITECTURE
M: James Hogan <james.hogan@imgtec.com>
S: Supported
F: arch/metag/
F: Documentation/metag/
F: Documentation/devicetree/bindings/metag/
F: drivers/clocksource/metag_generic.c
F: drivers/irqchip/irq-metag.c
F: drivers/irqchip/irq-metag-ext.c
F: drivers/tty/metag_da.c
F: fs/imgdafs/
MICROBLAZE ARCHITECTURE
M: Michal Simek <monstr@monstr.eu>
L: microblaze-uclinux@itee.uq.edu.au (moderated for non-subscribers)
@ -5437,6 +5458,7 @@ F: net/netrom/
NETWORK BLOCK DEVICE (NBD)
M: Paul Clements <Paul.Clements@steeleye.com>
S: Maintained
L: nbd-general@lists.sourceforge.net
F: Documentation/blockdev/nbd.txt
F: drivers/block/nbd.c
F: include/linux/nbd.h
@ -6512,6 +6534,12 @@ S: Maintained
F: Documentation/blockdev/ramdisk.txt
F: drivers/block/brd.c
RAMSAM DRIVER (IBM RamSan 70/80 PCI SSD Flash Card)
M: Joshua Morris <josh.h.morris@us.ibm.com>
M: Philip Kelleher <pjk1939@linux.vnet.ibm.com>
S: Maintained
F: drivers/block/rsxx/
RANDOM NUMBER DRIVER
M: Theodore Ts'o" <tytso@mit.edu>
S: Maintained
@ -7539,6 +7567,7 @@ STAGING - NVIDIA COMPLIANT EMBEDDED CONTROLLER INTERFACE (nvec)
M: Julian Andres Klode <jak@jak-linux.org>
M: Marc Dietrich <marvin24@gmx.de>
L: ac100@lists.launchpad.net (moderated for non-subscribers)
L: linux-tegra@vger.kernel.org
S: Maintained
F: drivers/staging/nvec/
@ -7665,6 +7694,12 @@ F: lib/swiotlb.c
F: arch/*/kernel/pci-swiotlb.c
F: include/linux/swiotlb.h
SYNOPSYS ARC ARCHITECTURE
M: Vineet Gupta <vgupta@synopsys.com>
L: linux-snps-arc@vger.kernel.org
S: Supported
F: arch/arc/
SYSV FILESYSTEM
M: Christoph Hellwig <hch@infradead.org>
S: Maintained
@ -7831,9 +7866,7 @@ L: linux-tegra@vger.kernel.org
Q: http://patchwork.ozlabs.org/project/linux-tegra/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra.git
S: Supported
F: arch/arm/mach-tegra
F: arch/arm/boot/dts/tegra*
F: arch/arm/configs/tegra_defconfig
K: (?i)[^a-z]tegra
TEHUTI ETHERNET DRIVER
M: Andy Gospodarek <andy@greyhouse.net>

10
Makefile
View File

@ -1,7 +1,7 @@
VERSION = 3
PATCHLEVEL = 8
PATCHLEVEL = 9
SUBLEVEL = 0
EXTRAVERSION =
EXTRAVERSION = -rc1
NAME = Unicycling Gorilla
# *DOCUMENTATION*
@ -192,7 +192,6 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
# "make" in the configured kernel build directory always uses that.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
export KBUILD_BUILDHOST := $(SUBARCH)
ARCH ?= $(SUBARCH)
CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
@ -620,7 +619,8 @@ KBUILD_AFLAGS += -gdwarf-2
endif
ifdef CONFIG_DEBUG_INFO_REDUCED
KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
$(call cc-option,-fno-var-tracking)
endif
ifdef CONFIG_FUNCTION_TRACER
@ -1398,7 +1398,7 @@ quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))
# Run depmod only if we have System.map and depmod is executable
quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
$(KERNELRELEASE)
$(KERNELRELEASE) "$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))"
# Create temporary dir for module support files
# clean it up only when building all modules

23
arch/Kconfig
View File

@ -103,6 +103,22 @@ config UPROBES
If in doubt, say "N".
config HAVE_64BIT_ALIGNED_ACCESS
def_bool 64BIT && !HAVE_EFFICIENT_UNALIGNED_ACCESS
help
Some architectures require 64 bit accesses to be 64 bit
aligned, which also requires structs containing 64 bit values
to be 64 bit aligned too. This includes some 32 bit
architectures which can do 64 bit accesses, as well as 64 bit
architectures without unaligned access.
This symbol should be selected by an architecture if 64 bit
accesses are required to be 64 bit aligned in this way even
though it is not a 64 bit architecture.
See Documentation/unaligned-memory-access.txt for more
information on the topic of unaligned memory accesses.
config HAVE_EFFICIENT_UNALIGNED_ACCESS
bool
help
@ -303,6 +319,13 @@ config ARCH_WANT_OLD_COMPAT_IPC
select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
bool
config HAVE_VIRT_TO_BUS
bool
help
An architecture should select this if it implements the
deprecated interface virt_to_bus(). All new architectures
should probably not select this.
config HAVE_ARCH_SECCOMP_FILTER
bool
help

1
arch/alpha/Kconfig
View File

@ -9,6 +9,7 @@ config ALPHA
select HAVE_PERF_EVENTS
select HAVE_DMA_ATTRS
select HAVE_GENERIC_HARDIRQS
select HAVE_VIRT_TO_BUS
select GENERIC_IRQ_PROBE
select AUTO_IRQ_AFFINITY if SMP
select GENERIC_IRQ_SHOW

2
arch/arc/Kbuild Normal file
View File

@ -0,0 +1,2 @@
obj-y += kernel/
obj-y += mm/

453
arch/arc/Kconfig Normal file
View File

@ -0,0 +1,453 @@
#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
config ARC
def_bool y
select CLONE_BACKWARDS
# ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev
select DEVTMPFS if !INITRAMFS_SOURCE=""
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select GENERIC_FIND_FIRST_BIT
# for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
select GENERIC_IRQ_SHOW
select GENERIC_KERNEL_EXECVE
select GENERIC_KERNEL_THREAD
select GENERIC_PENDING_IRQ if SMP
select GENERIC_SMP_IDLE_THREAD
select HAVE_ARCH_KGDB
select HAVE_ARCH_TRACEHOOK
select HAVE_GENERIC_HARDIRQS
select HAVE_IOREMAP_PROT
select HAVE_KPROBES
select HAVE_KRETPROBES
select HAVE_MEMBLOCK
select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
select HAVE_OPROFILE
select HAVE_PERF_EVENTS
select IRQ_DOMAIN
select MODULES_USE_ELF_RELA
select NO_BOOTMEM
select OF
select OF_EARLY_FLATTREE
select PERF_USE_VMALLOC
config SCHED_OMIT_FRAME_POINTER
def_bool y
config GENERIC_CSUM
def_bool y
config RWSEM_GENERIC_SPINLOCK
def_bool y
config ARCH_FLATMEM_ENABLE
def_bool y
config MMU
def_bool y
config NO_IOPORT
def_bool y
config GENERIC_CALIBRATE_DELAY
def_bool y
config GENERIC_HWEIGHT
def_bool y
config BINFMT_ELF
def_bool y
config STACKTRACE_SUPPORT
def_bool y
select STACKTRACE
config HAVE_LATENCYTOP_SUPPORT
def_bool y
config NO_DMA
def_bool n
source "init/Kconfig"
source "kernel/Kconfig.freezer"
menu "ARC Architecture Configuration"
menu "ARC Platform/SoC/Board"
source "arch/arc/plat-arcfpga/Kconfig"
#New platform adds here
endmenu
menu "ARC CPU Configuration"
choice
prompt "ARC Core"
default ARC_CPU_770
config ARC_CPU_750D
bool "ARC750D"
help
Support for ARC750 core
config ARC_CPU_770
bool "ARC770"
select ARC_CPU_REL_4_10
help
Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
This core has a bunch of cool new features:
-MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
Shared Address Spaces (for sharing TLB entires in MMU)
-Caches: New Prog Model, Region Flush
-Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
endchoice
config CPU_BIG_ENDIAN
bool "Enable Big Endian Mode"
default n
help
Build kernel for Big Endian Mode of ARC CPU
# If a platform can't work with 0x8000_0000 based dma_addr_t
config ARC_PLAT_NEEDS_CPU_TO_DMA
bool
config SMP
bool "Symmetric Multi-Processing (Incomplete)"
default n
select USE_GENERIC_SMP_HELPERS
help
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If
you have a system with more than one CPU, say Y.
if SMP
config ARC_HAS_COH_CACHES
def_bool n
config ARC_HAS_COH_LLSC
def_bool n
config ARC_HAS_COH_RTSC
def_bool n
config ARC_HAS_REENTRANT_IRQ_LV2
def_bool n
endif
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
depends on SMP
default "2"
menuconfig ARC_CACHE
bool "Enable Cache Support"
default y
# if SMP, cache enabled ONLY if ARC implementation has cache coherency
depends on !SMP || ARC_HAS_COH_CACHES
if ARC_CACHE
config ARC_CACHE_LINE_SHIFT
int "Cache Line Length (as power of 2)"
range 5 7
default "6"
help
Starting with ARC700 4.9, Cache line length is configurable,
This option specifies "N", with Line-len = 2 power N
So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
Linux only supports same line lengths for I and D caches.
config ARC_HAS_ICACHE
bool "Use Instruction Cache"
default y
config ARC_HAS_DCACHE
bool "Use Data Cache"
default y
config ARC_CACHE_PAGES
bool "Per Page Cache Control"
default y
depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
help
This can be used to over-ride the global I/D Cache Enable on a
per-page basis (but only for pages accessed via MMU such as
Kernel Virtual address or User Virtual Address)
TLB entries have a per-page Cache Enable Bit.
Note that Global I/D ENABLE + Per Page DISABLE works but corollary
Global DISABLE + Per Page ENABLE won't work
endif #ARC_CACHE
config ARC_HAS_ICCM
bool "Use ICCM"
help
Single Cycle RAMS to store Fast Path Code
default n
config ARC_ICCM_SZ
int "ICCM Size in KB"
default "64"
depends on ARC_HAS_ICCM
config ARC_HAS_DCCM
bool "Use DCCM"
help
Single Cycle RAMS to store Fast Path Data
default n
config ARC_DCCM_SZ
int "DCCM Size in KB"
default "64"
depends on ARC_HAS_DCCM
config ARC_DCCM_BASE
hex "DCCM map address"
default "0xA0000000"
depends on ARC_HAS_DCCM
config ARC_HAS_HW_MPY
bool "Use Hardware Multiplier (Normal or Faster XMAC)"
default y
help
Influences how gcc generates code for MPY operations.
If enabled, MPYxx insns are generated, provided by Standard/XMAC
Multipler. Otherwise software multipy lib is used
choice
prompt "ARC700 MMU Version"
default ARC_MMU_V3 if ARC_CPU_770
default ARC_MMU_V2 if ARC_CPU_750D
config ARC_MMU_V1
bool "MMU v1"
help
Orig ARC700 MMU
config ARC_MMU_V2
bool "MMU v2"
help
Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
when 2 D-TLB and 1 I-TLB entries index into same 2way set.
config ARC_MMU_V3
bool "MMU v3"
depends on ARC_CPU_770
help
Introduced with ARC700 4.10: New Features
Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
Shared Address Spaces (SASID)
endchoice
choice
prompt "MMU Page Size"
default ARC_PAGE_SIZE_8K
config ARC_PAGE_SIZE_8K
bool "8KB"
help
Choose between 8k vs 16k
config ARC_PAGE_SIZE_16K
bool "16KB"
depends on ARC_MMU_V3
config ARC_PAGE_SIZE_4K
bool "4KB"
depends on ARC_MMU_V3
endchoice
config ARC_COMPACT_IRQ_LEVELS
bool "ARCompact IRQ Priorities: High(2)/Low(1)"
default n
# Timer HAS to be high priority, for any other high priority config
select ARC_IRQ3_LV2
# if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
if ARC_COMPACT_IRQ_LEVELS
config ARC_IRQ3_LV2
bool
config ARC_IRQ5_LV2
bool
config ARC_IRQ6_LV2
bool
endif
config ARC_FPU_SAVE_RESTORE
bool "Enable FPU state persistence across context switch"
default n
help
Double Precision Floating Point unit had dedictaed regs which
need to be saved/restored across context-switch.
Note that ARC FPU is overly simplistic, unlike say x86, which has
hardware pieces to allow software to conditionally save/restore,
based on actual usage of FPU by a task. Thus our implemn does
this for all tasks in system.
menuconfig ARC_CPU_REL_4_10
bool "Enable support for Rel 4.10 features"
default n
help
-ARC770 (and dependent features) enabled
-ARC750 also shares some of the new features with 770
config ARC_HAS_LLSC
bool "Insn: LLOCK/SCOND (efficient atomic ops)"
default y
depends on ARC_CPU_770
# if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
depends on !SMP || ARC_HAS_COH_LLSC
config ARC_HAS_SWAPE
bool "Insn: SWAPE (endian-swap)"
default y
depends on ARC_CPU_REL_4_10
config ARC_HAS_RTSC
bool "Insn: RTSC (64-bit r/o cycle counter)"
default y
depends on ARC_CPU_REL_4_10
# if SMP, enable RTSC only if counter is coherent across cores
depends on !SMP || ARC_HAS_COH_RTSC
endmenu # "ARC CPU Configuration"
config LINUX_LINK_BASE
hex "Linux Link Address"
default "0x80000000"
help
ARC700 divides the 32 bit phy address space into two equal halves
-Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
-Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
Typically Linux kernel is linked at the start of untransalted addr,
hence the default value of 0x8zs.
However some customers have peripherals mapped at this addr, so
Linux needs to be scooted a bit.
If you don't know what the above means, leave this setting alone.
config ARC_CURR_IN_REG
bool "Dedicate Register r25 for current_task pointer"
default y
help
This reserved Register R25 to point to Current Task in
kernel mode. This saves memory access for each such access
config ARC_MISALIGN_ACCESS
bool "Emulate unaligned memory access (userspace only)"
default N
select SYSCTL_ARCH_UNALIGN_NO_WARN
select SYSCTL_ARCH_UNALIGN_ALLOW
help
This enables misaligned 16 & 32 bit memory access from user space.
Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
potential bugs in code
config ARC_STACK_NONEXEC
bool "Make stack non-executable"
default n
help
To disable the execute permissions of stack/heap of processes
which are enabled by default.
config HZ
int "Timer Frequency"
default 100
config ARC_METAWARE_HLINK
bool "Support for Metaware debugger assisted Host access"
default n
help
This options allows a Linux userland apps to directly access
host file system (open/creat/read/write etc) with help from
Metaware Debugger. This can come in handy for Linux-host communication
when there is no real usable peripheral such as EMAC.
menuconfig ARC_DBG
bool "ARC debugging"
default y
config ARC_DW2_UNWIND
bool "Enable DWARF specific kernel stack unwind"
depends on ARC_DBG
default y
select KALLSYMS
help
Compiles the kernel with DWARF unwind information and can be used
to get stack backtraces.
If you say Y here the resulting kernel image will be slightly larger
but not slower, and it will give very useful debugging information.
If you don't debug the kernel, you can say N, but we may not be able
to solve problems without frame unwind information
config ARC_DBG_TLB_PARANOIA
bool "Paranoia Checks in Low Level TLB Handlers"
depends on ARC_DBG
default n
config ARC_DBG_TLB_MISS_COUNT
bool "Profile TLB Misses"
default n
select DEBUG_FS
depends on ARC_DBG
help
Counts number of I and D TLB Misses and exports them via Debugfs
The counters can be cleared via Debugfs as well
config CMDLINE
string "Kernel command line to built-in"
default "print-fatal-signals=1"
help
The default command line which will be appended to the optional
u-boot provided command line (see below)
config CMDLINE_UBOOT
bool "Support U-boot kernel command line passing"
default n
help
If you are using U-boot (www.denx.de) and wish to pass the kernel
command line from the U-boot environment to the Linux kernel then
switch this option on.
ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
to it. kernel startup code will copy the string into cmdline buffer
and also append CONFIG_CMDLINE.
config ARC_BUILTIN_DTB_NAME
string "Built in DTB"
help
Set the name of the DTB to embed in the vmlinux binary
Leaving it blank selects the minimal "skeleton" dtb
source "kernel/Kconfig.preempt"
endmenu # "ARC Architecture Configuration"
source "mm/Kconfig"
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "arch/arc/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"

34
arch/arc/Kconfig.debug Normal file
View File

@ -0,0 +1,34 @@
menu "Kernel hacking"
source "lib/Kconfig.debug"
config EARLY_PRINTK
bool "Early printk" if EMBEDDED
default y
help
Write kernel log output directly into the VGA buffer or to a serial
port.
This is useful for kernel debugging when your machine crashes very
early before the console code is initialized. For normal operation
it is not recommended because it looks ugly and doesn't cooperate
with klogd/syslogd or the X server. You should normally N here,
unless you want to debug such a crash.
config DEBUG_STACKOVERFLOW
bool "Check for stack overflows"
depends on DEBUG_KERNEL
help
This option will cause messages to be printed if free stack space
drops below a certain limit.
config 16KSTACKS
bool "Use 16Kb for kernel stacks instead of 8Kb"
help
If you say Y here the kernel will use a 16Kb stacksize for the
kernel stack attached to each process/thread. The default is 8K.
This increases the resident kernel footprint and will cause less
threads to run on the system and also increase the pressure
on the VM subsystem for higher order allocations.
endmenu

126
arch/arc/Makefile Normal file
View File

@ -0,0 +1,126 @@
#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
UTS_MACHINE := arc
KBUILD_DEFCONFIG := fpga_defconfig
cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__
LINUXINCLUDE += -include ${src}/arch/arc/include/asm/defines.h
ifdef CONFIG_ARC_CURR_IN_REG
# For a global register defintion, make sure it gets passed to every file
# We had a customer reported bug where some code built in kernel was NOT using
# any kernel headers, and missing the r25 global register
# Can't do unconditionally (like above) because of recursive include issues
# due to <linux/thread_info.h>
LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
endif
atleast_gcc44 := $(call cc-ifversion, -gt, 0402, y)
cflags-$(atleast_gcc44) += -fsection-anchors
cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc
cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
# Generic build system uses -O2, we want -O3
cflags-y += -O3
endif
# small data is default for elf32 tool-chain. If not usable, disable it
# This also allows repurposing GP as scratch reg to gcc reg allocator
disable_small_data := y
cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
# STAR 9000518362:
# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
# --build-id w/o "-marclinux".
# Default arc-elf32-ld is OK
ldflags-y += -marclinux
ARC_LIBGCC := -mA7
cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16
ifndef CONFIG_ARC_HAS_HW_MPY
cflags-y += -mno-mpy
# newlib for ARC700 assumes MPY to be always present, which is generally true
# However, if someone really doesn't want MPY, we need to use the 600 ver
# which coupled with -mno-mpy will use mpy emulation
# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted
ARC_LIBGCC := -marc600
ifneq ($(atleast_gcc44),y)
cflags-y += -multcost=30
endif
endif
LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name)
# Modules with short calls might break for calls into builtin-kernel
KBUILD_CFLAGS_MODULE += -mlong-calls
# Finally dump eveything into kernel build system
KBUILD_CFLAGS += $(cflags-y)
KBUILD_AFLAGS += $(KBUILD_CFLAGS)
LDFLAGS += $(ldflags-y)
head-y := arch/arc/kernel/head.o
# See arch/arc/Kbuild for content of core part of the kernel
core-y += arch/arc/
# w/o this dtb won't embed into kernel binary
core-y += arch/arc/boot/dts/
core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/
drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
libs-y += arch/arc/lib/ $(LIBGCC)
#default target for make without any arguements.
KBUILD_IMAGE := bootpImage
all: $(KBUILD_IMAGE)
boot := arch/arc/boot
bootpImage: vmlinux
uImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
%.dtb %.dtb.S %.dtb.o: scripts
$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
dtbs: scripts
$(Q)$(MAKE) $(build)=$(boot)/dts dtbs
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
# Hacks to enable final link due to absence of link-time branch relexation
# and gcc choosing optimal(shorter) branches at -O3
#
# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
# However lib/decompress_inflate.o (.init.text) calls
# zlib_inflate_workspacesize (.text) causing relocation errors.
# Thus forcing all exten calls in this file to be long calls
export CFLAGS_decompress_inflate.o = -mmedium-calls
export CFLAGS_initramfs.o = -mmedium-calls
ifdef CONFIG_SMP
export CFLAGS_core.o = -mmedium-calls
endif

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targets := vmlinux.bin vmlinux.bin.gz uImage
# uImage build relies on mkimage being availble on your host for ARC target
# You will need to build u-boot for ARC, rename mkimage to arc-elf32-mkimage
# and make sure it's reacable from your PATH
MKIMAGE := $(srctree)/scripts/mkuboot.sh
OBJCOPYFLAGS= -O binary -R .note -R .note.gnu.build-id -R .comment -S
LINUX_START_TEXT = $$(readelf -h vmlinux | \
grep "Entry point address" | grep -o 0x.*)
UIMAGE_LOADADDR = $(CONFIG_LINUX_LINK_BASE)
UIMAGE_ENTRYADDR = $(LINUX_START_TEXT)
UIMAGE_COMPRESSION = gzip
$(obj)/vmlinux.bin: vmlinux FORCE
$(call if_changed,objcopy)
$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
$(call if_changed,gzip)
$(obj)/uImage: $(obj)/vmlinux.bin.gz FORCE
$(call if_changed,uimage)
PHONY += FORCE

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# Built-in dtb
builtindtb-y := angel4
ifneq ($(CONFIG_ARC_BUILTIN_DTB_NAME),"")
builtindtb-y := $(patsubst "%",%,$(CONFIG_ARC_BUILTIN_DTB_NAME))
endif
obj-y += $(builtindtb-y).dtb.o
targets += $(builtindtb-y).dtb
dtbs: $(addprefix $(obj)/, $(builtindtb-y).dtb)
clean-files := *.dtb

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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "skeleton.dtsi"
/ {
compatible = "snps,arc-angel4";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&intc>;
chosen {
bootargs = "console=ttyARC0,115200n8";
};
aliases {
serial0 = &arcuart0;
};
memory {
device_type = "memory";
reg = <0x00000000 0x10000000>; /* 256M */
};
fpga {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
/* child and parent address space 1:1 mapped */
ranges;
intc: interrupt-controller {
compatible = "snps,arc700-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
arcuart0: serial@c0fc1000 {
compatible = "snps,arc-uart";
reg = <0xc0fc1000 0x100>;
interrupts = <5>;
clock-frequency = <80000000>;
current-speed = <115200>;
status = "okay";
};
};
};

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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "skeleton.dtsi"

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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Skeleton device tree; the bare minimum needed to boot; just include and
* add a compatible value.
*/
/ {
compatible = "snps,arc";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;
chosen { };
aliases { };
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu@0 {
device_type = "cpu";
compatible = "snps,arc770d";
reg = <0>;
};
};
memory {
device_type = "memory";
reg = <0x00000000 0x10000000>; /* 256M */
};
};

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CONFIG_CROSS_COMPILE="arc-elf32-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../arc_initramfs"
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_KPROBES=y
CONFIG_MODULES=y
# CONFIG_LBDAF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_FPGA_LEGACY=y
CONFIG_ARC_BOARD_ML509=y
# CONFIG_ARC_HAS_RTSC is not set
CONFIG_ARC_BUILTIN_DTB_NAME="angel4"
# CONFIG_COMPACTION is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
CONFIG_NET_KEY=y
CONFIG_INET=y
# CONFIG_IPV6 is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_ARC=y
CONFIG_SERIAL_ARC_CONSOLE=y
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
# CONFIG_VGA_CONSOLE is not set
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_XZ_DEC=y

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generic-y += auxvec.h
generic-y += bugs.h
generic-y += bitsperlong.h
generic-y += clkdev.h
generic-y += cputime.h
generic-y += device.h
generic-y += div64.h
generic-y += emergency-restart.h
generic-y += errno.h
generic-y += fcntl.h
generic-y += fb.h
generic-y += ftrace.h
generic-y += hardirq.h
generic-y += hw_irq.h
generic-y += ioctl.h
generic-y += ioctls.h
generic-y += ipcbuf.h
generic-y += irq_regs.h
generic-y += kmap_types.h
generic-y += kvm_para.h
generic-y += local.h
generic-y += local64.h
generic-y += mman.h
generic-y += msgbuf.h
generic-y += param.h
generic-y += parport.h
generic-y += pci.h
generic-y += percpu.h
generic-y += poll.h
generic-y += posix_types.h
generic-y += resource.h
generic-y += scatterlist.h
generic-y += sembuf.h
generic-y += shmbuf.h
generic-y += shmparam.h
generic-y += siginfo.h
generic-y += socket.h
generic-y += sockios.h
generic-y += stat.h
generic-y += statfs.h
generic-y += termbits.h
generic-y += termios.h
generic-y += topology.h
generic-y += trace_clock.h
generic-y += types.h
generic-y += ucontext.h
generic-y += user.h
generic-y += vga.h
generic-y += xor.h

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_ARCREGS_H
#define _ASM_ARC_ARCREGS_H
#ifdef __KERNEL__
/* Build Configuration Registers */
#define ARC_REG_DCCMBASE_BCR 0x61 /* DCCM Base Addr */
#define ARC_REG_CRC_BCR 0x62
#define ARC_REG_DVFB_BCR 0x64
#define ARC_REG_EXTARITH_BCR 0x65
#define ARC_REG_VECBASE_BCR 0x68
#define ARC_REG_PERIBASE_BCR 0x69
#define ARC_REG_FP_BCR 0x6B /* Single-Precision FPU */
#define ARC_REG_DPFP_BCR 0x6C /* Dbl Precision FPU */
#define ARC_REG_MMU_BCR 0x6f
#define ARC_REG_DCCM_BCR 0x74 /* DCCM Present + SZ */
#define ARC_REG_TIMERS_BCR 0x75
#define ARC_REG_ICCM_BCR 0x78
#define ARC_REG_XY_MEM_BCR 0x79
#define ARC_REG_MAC_BCR 0x7a
#define ARC_REG_MUL_BCR 0x7b
#define ARC_REG_SWAP_BCR 0x7c
#define ARC_REG_NORM_BCR 0x7d
#define ARC_REG_MIXMAX_BCR 0x7e
#define ARC_REG_BARREL_BCR 0x7f
#define ARC_REG_D_UNCACH_BCR 0x6A
/* status32 Bits Positions */
#define STATUS_H_BIT 0 /* CPU Halted */
#define STATUS_E1_BIT 1 /* Int 1 enable */
#define STATUS_E2_BIT 2 /* Int 2 enable */
#define STATUS_A1_BIT 3 /* Int 1 active */
#define STATUS_A2_BIT 4 /* Int 2 active */
#define STATUS_AE_BIT 5 /* Exception active */
#define STATUS_DE_BIT 6 /* PC is in delay slot */
#define STATUS_U_BIT 7 /* User/Kernel mode */
#define STATUS_L_BIT 12 /* Loop inhibit */
/* These masks correspond to the status word(STATUS_32) bits */
#define STATUS_H_MASK (1<<STATUS_H_BIT)
#define STATUS_E1_MASK (1<<STATUS_E1_BIT)
#define STATUS_E2_MASK (1<<STATUS_E2_BIT)
#define STATUS_A1_MASK (1<<STATUS_A1_BIT)
#define STATUS_A2_MASK (1<<STATUS_A2_BIT)
#define STATUS_AE_MASK (1<<STATUS_AE_BIT)
#define STATUS_DE_MASK (1<<STATUS_DE_BIT)
#define STATUS_U_MASK (1<<STATUS_U_BIT)
#define STATUS_L_MASK (1<<STATUS_L_BIT)
/*
* ECR: Exception Cause Reg bits-n-pieces
* [23:16] = Exception Vector
* [15: 8] = Exception Cause Code
* [ 7: 0] = Exception Parameters (for certain types only)
*/
#define ECR_VEC_MASK 0xff0000
#define ECR_CODE_MASK 0x00ff00
#define ECR_PARAM_MASK 0x0000ff
/* Exception Cause Vector Values */
#define ECR_V_INSN_ERR 0x02
#define ECR_V_MACH_CHK 0x20
#define ECR_V_ITLB_MISS 0x21
#define ECR_V_DTLB_MISS 0x22
#define ECR_V_PROTV 0x23
/* Protection Violation Exception Cause Code Values */
#define ECR_C_PROTV_INST_FETCH 0x00
#define ECR_C_PROTV_LOAD 0x01
#define ECR_C_PROTV_STORE 0x02
#define ECR_C_PROTV_XCHG 0x03
#define ECR_C_PROTV_MISALIG_DATA 0x04
/* DTLB Miss Exception Cause Code Values */
#define ECR_C_BIT_DTLB_LD_MISS 8
#define ECR_C_BIT_DTLB_ST_MISS 9
/* Auxiliary registers */
#define AUX_IDENTITY 4
#define AUX_INTR_VEC_BASE 0x25
#define AUX_IRQ_LEV 0x200 /* IRQ Priority: L1 or L2 */
#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
#define AUX_IRQ_LV12 0x43 /* interrupt level register */
#define AUX_IENABLE 0x40c
#define AUX_ITRIGGER 0x40d
#define AUX_IPULSE 0x415
/* Timer related Aux registers */
#define ARC_REG_TIMER0_LIMIT 0x23 /* timer 0 limit */
#define ARC_REG_TIMER0_CTRL 0x22 /* timer 0 control */
#define ARC_REG_TIMER0_CNT 0x21 /* timer 0 count */
#define ARC_REG_TIMER1_LIMIT 0x102 /* timer 1 limit */
#define ARC_REG_TIMER1_CTRL 0x101 /* timer 1 control */
#define ARC_REG_TIMER1_CNT 0x100 /* timer 1 count */
#define TIMER_CTRL_IE (1 << 0) /* Interupt when Count reachs limit */
#define TIMER_CTRL_NH (1 << 1) /* Count only when CPU NOT halted */
/* MMU Management regs */
#define ARC_REG_TLBPD0 0x405
#define ARC_REG_TLBPD1 0x406
#define ARC_REG_TLBINDEX 0x407
#define ARC_REG_TLBCOMMAND 0x408
#define ARC_REG_PID 0x409
#define ARC_REG_SCRATCH_DATA0 0x418
/* Bits in MMU PID register */
#define MMU_ENABLE (1 << 31) /* Enable MMU for process */
/* Error code if probe fails */
#define TLB_LKUP_ERR 0x80000000
/* TLB Commands */
#define TLBWrite 0x1
#define TLBRead 0x2
#define TLBGetIndex 0x3
#define TLBProbe 0x4
#if (CONFIG_ARC_MMU_VER >= 2)
#define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */
#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
#else
#undef TLBWriteNI /* These cmds don't exist on older MMU */
#undef TLBIVUTLB
#endif
/* Instruction cache related Auxiliary registers */
#define ARC_REG_IC_BCR 0x77 /* Build Config reg */
#define ARC_REG_IC_IVIC 0x10
#define ARC_REG_IC_CTRL 0x11
#define ARC_REG_IC_IVIL 0x19
#if (CONFIG_ARC_MMU_VER > 2)
#define ARC_REG_IC_PTAG 0x1E
#endif
/* Bit val in IC_CTRL */
#define IC_CTRL_CACHE_DISABLE 0x1
/* Data cache related Auxiliary registers */
#define ARC_REG_DC_BCR 0x72
#define ARC_REG_DC_IVDC 0x47
#define ARC_REG_DC_CTRL 0x48
#define ARC_REG_DC_IVDL 0x4A
#define ARC_REG_DC_FLSH 0x4B
#define ARC_REG_DC_FLDL 0x4C
#if (CONFIG_ARC_MMU_VER > 2)
#define ARC_REG_DC_PTAG 0x5C
#endif
/* Bit val in DC_CTRL */
#define DC_CTRL_INV_MODE_FLUSH 0x40
#define DC_CTRL_FLUSH_STATUS 0x100
/* MMU Management regs */
#define ARC_REG_PID 0x409
#define ARC_REG_SCRATCH_DATA0 0x418
/* Bits in MMU PID register */
#define MMU_ENABLE (1 << 31) /* Enable MMU for process */
/*
* Floating Pt Registers
* Status regs are read-only (build-time) so need not be saved/restored
*/
#define ARC_AUX_FP_STAT 0x300
#define ARC_AUX_DPFP_1L 0x301
#define ARC_AUX_DPFP_1H 0x302
#define ARC_AUX_DPFP_2L 0x303
#define ARC_AUX_DPFP_2H 0x304
#define ARC_AUX_DPFP_STAT 0x305
#ifndef __ASSEMBLY__
/*
******************************************************************
* Inline ASM macros to read/write AUX Regs
* Essentially invocation of lr/sr insns from "C"
*/
#if 1
#define read_aux_reg(reg) __builtin_arc_lr(reg)
/* gcc builtin sr needs reg param to be long immediate */
#define write_aux_reg(reg_immed, val) \
__builtin_arc_sr((unsigned int)val, reg_immed)
#else
#define read_aux_reg(reg) \
({ \
unsigned int __ret; \
__asm__ __volatile__( \
" lr %0, [%1]" \
: "=r"(__ret) \
: "i"(reg)); \
__ret; \
})
/*
* Aux Reg address is specified as long immediate by caller
* e.g.
* write_aux_reg(0x69, some_val);
* This generates tightest code.
*/
#define write_aux_reg(reg_imm, val) \
({ \
__asm__ __volatile__( \
" sr %0, [%1] \n" \
: \
: "ir"(val), "i"(reg_imm)); \
})
/*
* Aux Reg address is specified in a variable
* * e.g.
* reg_num = 0x69
* write_aux_reg2(reg_num, some_val);
* This has to generate glue code to load the reg num from
* memory to a reg hence not recommended.
*/
#define write_aux_reg2(reg_in_var, val) \
({ \
unsigned int tmp; \
\
__asm__ __volatile__( \
" ld %0, [%2] \n\t" \
" sr %1, [%0] \n\t" \
: "=&r"(tmp) \
: "r"(val), "memory"(&reg_in_var)); \
})
#endif
#define READ_BCR(reg, into) \
{ \
unsigned int tmp; \
tmp = read_aux_reg(reg); \
if (sizeof(tmp) == sizeof(into)) { \
into = *((typeof(into) *)&tmp); \
} else { \
extern void bogus_undefined(void); \
bogus_undefined(); \
} \
}
#define WRITE_BCR(reg, into) \
{ \
unsigned int tmp; \
if (sizeof(tmp) == sizeof(into)) { \
tmp = (*(unsigned int *)(into)); \
write_aux_reg(reg, tmp); \
} else { \
extern void bogus_undefined(void); \
bogus_undefined(); \
} \
}
/* Helpers */
#define TO_KB(bytes) ((bytes) >> 10)
#define TO_MB(bytes) (TO_KB(bytes) >> 10)
#define PAGES_TO_KB(n_pages) ((n_pages) << (PAGE_SHIFT - 10))
#define PAGES_TO_MB(n_pages) (PAGES_TO_KB(n_pages) >> 10)
#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
/* These DPFP regs need to be saved/restored across ctx-sw */
struct arc_fpu {
struct {
unsigned int l, h;
} aux_dpfp[2];
};
#endif
/*
***************************************************************
* Build Configuration Registers, with encoded hardware config
*/
struct bcr_identity {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int chip_id:16, cpu_id:8, family:8;
#else
unsigned int family:8, cpu_id:8, chip_id:16;
#endif
};
struct bcr_mmu_1_2 {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int ver:8, ways:4, sets:4, u_itlb:8, u_dtlb:8;
#else
unsigned int u_dtlb:8, u_itlb:8, sets:4, ways:4, ver:8;
#endif
};
struct bcr_mmu_3 {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int ver:8, ways:4, sets:4, osm:1, reserv:3, pg_sz:4,
u_itlb:4, u_dtlb:4;
#else
unsigned int u_dtlb:4, u_itlb:4, pg_sz:4, reserv:3, osm:1, sets:4,
ways:4, ver:8;
#endif
};
#define EXTN_SWAP_VALID 0x1
#define EXTN_NORM_VALID 0x2
#define EXTN_MINMAX_VALID 0x2
#define EXTN_BARREL_VALID 0x2
struct bcr_extn {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:20, crc:1, ext_arith:2, mul:2, barrel:2, minmax:2,
norm:2, swap:1;
#else
unsigned int swap:1, norm:2, minmax:2, barrel:2, mul:2, ext_arith:2,
crc:1, pad:20;
#endif
};
/* DSP Options Ref Manual */
struct bcr_extn_mac_mul {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:16, type:8, ver:8;
#else
unsigned int ver:8, type:8, pad:16;
#endif
};
struct bcr_extn_xymem {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int ram_org:2, num_banks:4, bank_sz:4, ver:8;
#else
unsigned int ver:8, bank_sz:4, num_banks:4, ram_org:2;
#endif
};
struct bcr_cache {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:12, line_len:4, sz:4, config:4, ver:8;
#else
unsigned int ver:8, config:4, sz:4, line_len:4, pad:12;
#endif
};
struct bcr_perip {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int start:8, pad2:8, sz:8, pad:8;
#else
unsigned int pad:8, sz:8, pad2:8, start:8;
#endif
};
struct bcr_iccm {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int base:16, pad:5, sz:3, ver:8;
#else
unsigned int ver:8, sz:3, pad:5, base:16;
#endif
};
/* DCCM Base Address Register: ARC_REG_DCCMBASE_BCR */
struct bcr_dccm_base {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int addr:24, ver:8;
#else
unsigned int ver:8, addr:24;
#endif
};
/* DCCM RAM Configuration Register: ARC_REG_DCCM_BCR */
struct bcr_dccm {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int res:21, sz:3, ver:8;
#else
unsigned int ver:8, sz:3, res:21;
#endif
};
/* Both SP and DP FPU BCRs have same format */
struct bcr_fp {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int fast:1, ver:8;
#else
unsigned int ver:8, fast:1;
#endif
};
/*
*******************************************************************
* Generic structures to hold build configuration used at runtime
*/
struct cpuinfo_arc_mmu {
unsigned int ver, pg_sz, sets, ways, u_dtlb, u_itlb, num_tlb;
};
struct cpuinfo_arc_cache {
unsigned int has_aliasing, sz, line_len, assoc, ver;
};
struct cpuinfo_arc_ccm {
unsigned int base_addr, sz;
};
struct cpuinfo_arc {
struct cpuinfo_arc_cache icache, dcache;
struct cpuinfo_arc_mmu mmu;
struct bcr_identity core;
unsigned int timers;
unsigned int vec_base;
unsigned int uncached_base;
struct cpuinfo_arc_ccm iccm, dccm;
struct bcr_extn extn;
struct bcr_extn_xymem extn_xymem;
struct bcr_extn_mac_mul extn_mac_mul;
struct bcr_fp fp, dpfp;
};
extern struct cpuinfo_arc cpuinfo_arc700[];
#endif /* __ASEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_ARC_ARCREGS_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <generated/asm-offsets.h>

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_ATOMIC_H
#define _ASM_ARC_ATOMIC_H
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <linux/compiler.h>
#include <asm/cmpxchg.h>
#include <asm/barrier.h>
#include <asm/smp.h>
#define atomic_read(v) ((v)->counter)
#ifdef CONFIG_ARC_HAS_LLSC
#define atomic_set(v, i) (((v)->counter) = (i))
static inline void atomic_add(int i, atomic_t *v)
{
unsigned int temp;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" add %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp) /* Early clobber, to prevent reg reuse */
: "r"(&v->counter), "ir"(i)
: "cc");
}
static inline void atomic_sub(int i, atomic_t *v)
{
unsigned int temp;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" sub %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(&v->counter), "ir"(i)
: "cc");
}
/* add and also return the new value */
static inline int atomic_add_return(int i, atomic_t *v)
{
unsigned int temp;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" add %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(&v->counter), "ir"(i)
: "cc");
return temp;
}
static inline int atomic_sub_return(int i, atomic_t *v)
{
unsigned int temp;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" sub %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(&v->counter), "ir"(i)
: "cc");
return temp;
}
static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
{
unsigned int temp;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" bic %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(addr), "ir"(mask)
: "cc");
}
#else /* !CONFIG_ARC_HAS_LLSC */
#ifndef CONFIG_SMP
/* violating atomic_xxx API locking protocol in UP for optimization sake */
#define atomic_set(v, i) (((v)->counter) = (i))
#else
static inline void atomic_set(atomic_t *v, int i)
{
/*
* Independent of hardware support, all of the atomic_xxx() APIs need
* to follow the same locking rules to make sure that a "hardware"
* atomic insn (e.g. LD) doesn't clobber an "emulated" atomic insn
* sequence
*
* Thus atomic_set() despite being 1 insn (and seemingly atomic)
* requires the locking.
*/
unsigned long flags;
atomic_ops_lock(flags);
v->counter = i;
atomic_ops_unlock(flags);
}
#endif
/*
* Non hardware assisted Atomic-R-M-W
* Locking would change to irq-disabling only (UP) and spinlocks (SMP)
*/
static inline void atomic_add(int i, atomic_t *v)
{
unsigned long flags;
atomic_ops_lock(flags);
v->counter += i;
atomic_ops_unlock(flags);
}
static inline void atomic_sub(int i, atomic_t *v)
{
unsigned long flags;
atomic_ops_lock(flags);
v->counter -= i;
atomic_ops_unlock(flags);
}
static inline int atomic_add_return(int i, atomic_t *v)
{
unsigned long flags;
unsigned long temp;
atomic_ops_lock(flags);
temp = v->counter;
temp += i;
v->counter = temp;
atomic_ops_unlock(flags);
return temp;
}
static inline int atomic_sub_return(int i, atomic_t *v)
{
unsigned long flags;
unsigned long temp;
atomic_ops_lock(flags);
temp = v->counter;
temp -= i;
v->counter = temp;
atomic_ops_unlock(flags);
return temp;
}
static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
{
unsigned long flags;
atomic_ops_lock(flags);
*addr &= ~mask;
atomic_ops_unlock(flags);
}
#endif /* !CONFIG_ARC_HAS_LLSC */
/**
* __atomic_add_unless - add unless the number is a given value
* @v: pointer of type atomic_t
* @a: the amount to add to v...
* @u: ...unless v is equal to u.
*
* Atomically adds @a to @v, so long as it was not @u.
* Returns the old value of @v
*/
#define __atomic_add_unless(v, a, u) \
({ \
int c, old; \
c = atomic_read(v); \
while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c)\
c = old; \
c; \
})
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
#define atomic_inc(v) atomic_add(1, v)
#define atomic_dec(v) atomic_sub(1, v)
#define atomic_inc_and_test(v) (atomic_add_return(1, v) == 0)
#define atomic_dec_and_test(v) (atomic_sub_return(1, v) == 0)
#define atomic_inc_return(v) atomic_add_return(1, (v))
#define atomic_dec_return(v) atomic_sub_return(1, (v))
#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
#define atomic_add_negative(i, v) (atomic_add_return(i, v) < 0)
#define ATOMIC_INIT(i) { (i) }
#include <asm-generic/atomic64.h>
#endif
#endif
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_BARRIER_H
#define __ASM_BARRIER_H
#ifndef __ASSEMBLY__
/* TODO-vineetg: Need to see what this does, don't we need sync anywhere */
#define mb() __asm__ __volatile__ ("" : : : "memory")
#define rmb() mb()
#define wmb() mb()
#define set_mb(var, value) do { var = value; mb(); } while (0)
#define set_wmb(var, value) do { var = value; wmb(); } while (0)
#define read_barrier_depends() mb()
/* TODO-vineetg verify the correctness of macros here */
#ifdef CONFIG_SMP
#define smp_mb() mb()
#define smp_rmb() rmb()
#define smp_wmb() wmb()
#else
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#endif
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
#define smp_read_barrier_depends() do { } while (0)
#endif
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_BITOPS_H
#define _ASM_BITOPS_H
#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <linux/compiler.h>
/*
* Hardware assisted read-modify-write using ARC700 LLOCK/SCOND insns.
* The Kconfig glue ensures that in SMP, this is only set if the container
* SoC/platform has cross-core coherent LLOCK/SCOND
*/
#if defined(CONFIG_ARC_HAS_LLSC)
static inline void set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" bset %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
}
static inline void clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" bclr %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
}
static inline void change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" bxor %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
}
/*
* Semantically:
* Test the bit
* if clear
* set it and return 0 (old value)
* else
* return 1 (old value).
*
* Since ARC lacks a equivalent h/w primitive, the bit is set unconditionally
* and the old value of bit is returned
*/
static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%2] \n"
" bset %1, %0, %3 \n"
" scond %1, [%2] \n"
" bnz 1b \n"
: "=&r"(old), "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
return (old & (1 << nr)) != 0;
}
static inline int
test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int old, temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%2] \n"
" bclr %1, %0, %3 \n"
" scond %1, [%2] \n"
" bnz 1b \n"
: "=&r"(old), "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
return (old & (1 << nr)) != 0;
}
static inline int
test_and_change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int old, temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%2] \n"
" bxor %1, %0, %3 \n"
" scond %1, [%2] \n"
" bnz 1b \n"
: "=&r"(old), "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
return (old & (1 << nr)) != 0;
}
#else /* !CONFIG_ARC_HAS_LLSC */
#include <asm/smp.h>
/*
* Non hardware assisted Atomic-R-M-W
* Locking would change to irq-disabling only (UP) and spinlocks (SMP)
*
* There's "significant" micro-optimization in writing our own variants of
* bitops (over generic variants)
*
* (1) The generic APIs have "signed" @nr while we have it "unsigned"
* This avoids extra code to be generated for pointer arithmatic, since
* is "not sure" that index is NOT -ve
* (2) Utilize the fact that ARCompact bit fidding insn (BSET/BCLR/ASL) etc
* only consider bottom 5 bits of @nr, so NO need to mask them off.
* (GCC Quirk: however for constant @nr we still need to do the masking
* at compile time)
*/
static inline void set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
temp = *m;
*m = temp | (1UL << nr);
bitops_unlock(flags);
}
static inline void clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
temp = *m;
*m = temp & ~(1UL << nr);
bitops_unlock(flags);
}
static inline void change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
temp = *m;
*m = temp ^ (1UL << nr);
bitops_unlock(flags);
}
static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
old = *m;
*m = old | (1 << nr);
bitops_unlock(flags);
return (old & (1 << nr)) != 0;
}
static inline int
test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
old = *m;
*m = old & ~(1 << nr);
bitops_unlock(flags);
return (old & (1 << nr)) != 0;
}
static inline int
test_and_change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
old = *m;
*m = old ^ (1 << nr);
bitops_unlock(flags);
return (old & (1 << nr)) != 0;
}
#endif /* CONFIG_ARC_HAS_LLSC */
/***************************************
* Non atomic variants
**************************************/
static inline void __set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
temp = *m;
*m = temp | (1UL << nr);
}
static inline void __clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
temp = *m;
*m = temp & ~(1UL << nr);
}
static inline void __change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
temp = *m;
*m = temp ^ (1UL << nr);
}
static inline int
__test_and_set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
old = *m;
*m = old | (1 << nr);
return (old & (1 << nr)) != 0;
}
static inline int
__test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
old = *m;
*m = old & ~(1 << nr);
return (old & (1 << nr)) != 0;
}
static inline int
__test_and_change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
old = *m;
*m = old ^ (1 << nr);
return (old & (1 << nr)) != 0;
}
/*
* This routine doesn't need to be atomic.
*/
static inline int
__constant_test_bit(unsigned int nr, const volatile unsigned long *addr)
{
return ((1UL << (nr & 31)) &
(((const volatile unsigned int *)addr)[nr >> 5])) != 0;
}
static inline int
__test_bit(unsigned int nr, const volatile unsigned long *addr)
{
unsigned long mask;
addr += nr >> 5;
/* ARC700 only considers 5 bits in bit-fiddling insn */
mask = 1 << nr;
return ((mask & *addr) != 0);
}
#define test_bit(nr, addr) (__builtin_constant_p(nr) ? \
__constant_test_bit((nr), (addr)) : \
__test_bit((nr), (addr)))
/*
* Count the number of zeros, starting from MSB
* Helper for fls( ) friends
* This is a pure count, so (1-32) or (0-31) doesn't apply
* It could be 0 to 32, based on num of 0's in there
* clz(0x8000_0000) = 0, clz(0xFFFF_FFFF)=0, clz(0) = 32, clz(1) = 31
*/
static inline __attribute__ ((const)) int clz(unsigned int x)
{
unsigned int res;
__asm__ __volatile__(
" norm.f %0, %1 \n"
" mov.n %0, 0 \n"
" add.p %0, %0, 1 \n"
: "=r"(res)
: "r"(x)
: "cc");
return res;
}
static inline int constant_fls(int x)
{
int r = 32;
if (!x)
return 0;
if (!(x & 0xffff0000u)) {
x <<= 16;
r -= 16;
}
if (!(x & 0xff000000u)) {
x <<= 8;
r -= 8;
}
if (!(x & 0xf0000000u)) {
x <<= 4;
r -= 4;
}
if (!(x & 0xc0000000u)) {
x <<= 2;
r -= 2;
}
if (!(x & 0x80000000u)) {
x <<= 1;
r -= 1;
}
return r;
}
/*
* fls = Find Last Set in word
* @result: [1-32]
* fls(1) = 1, fls(0x80000000) = 32, fls(0) = 0
*/
static inline __attribute__ ((const)) int fls(unsigned long x)
{
if (__builtin_constant_p(x))
return constant_fls(x);
return 32 - clz(x);
}
/*
* __fls: Similar to fls, but zero based (0-31)
*/
static inline __attribute__ ((const)) int __fls(unsigned long x)
{
if (!x)
return 0;
else
return fls(x) - 1;
}
/*
* ffs = Find First Set in word (LSB to MSB)
* @result: [1-32], 0 if all 0's
*/
#define ffs(x) ({ unsigned long __t = (x); fls(__t & -__t); })
/*
* __ffs: Similar to ffs, but zero based (0-31)
*/
static inline __attribute__ ((const)) int __ffs(unsigned long word)
{
if (!word)
return word;
return ffs(word) - 1;
}
/*
* ffz = Find First Zero in word.
* @return:[0-31], 32 if all 1's
*/
#define ffz(x) __ffs(~(x))
/* TODO does this affect uni-processor code */
#define smp_mb__before_clear_bit() barrier()
#define smp_mb__after_clear_bit() barrier()
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/le.h>
#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_BUG_H
#define _ASM_ARC_BUG_H
#ifndef __ASSEMBLY__
#include <asm/ptrace.h>
struct task_struct;
void show_regs(struct pt_regs *regs);
void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs);
void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
unsigned long address, unsigned long cause_reg);
void die(const char *str, struct pt_regs *regs, unsigned long address,
unsigned long cause_reg);
#define BUG() do { \
dump_stack(); \
pr_warn("Kernel BUG in %s: %s: %d!\n", \
__FILE__, __func__, __LINE__); \
} while (0)
#define HAVE_ARCH_BUG
#include <asm-generic/bug.h>
#endif /* !__ASSEMBLY__ */
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ARC_ASM_CACHE_H
#define __ARC_ASM_CACHE_H
/* In case $$ not config, setup a dummy number for rest of kernel */
#ifndef CONFIG_ARC_CACHE_LINE_SHIFT
#define L1_CACHE_SHIFT 6
#else
#define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT
#endif
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
#define ARC_ICACHE_WAYS 2
#define ARC_DCACHE_WAYS 4
/* Helpers */
#define ARC_ICACHE_LINE_LEN L1_CACHE_BYTES
#define ARC_DCACHE_LINE_LEN L1_CACHE_BYTES
#define ICACHE_LINE_MASK (~(ARC_ICACHE_LINE_LEN - 1))
#define DCACHE_LINE_MASK (~(ARC_DCACHE_LINE_LEN - 1))
#if ARC_ICACHE_LINE_LEN != ARC_DCACHE_LINE_LEN
#error "Need to fix some code as I/D cache lines not same"
#else
#define is_not_cache_aligned(p) ((unsigned long)p & (~DCACHE_LINE_MASK))
#endif
#ifndef __ASSEMBLY__
/* Uncached access macros */
#define arc_read_uncached_32(ptr) \
({ \
unsigned int __ret; \
__asm__ __volatile__( \
" ld.di %0, [%1] \n" \
: "=r"(__ret) \
: "r"(ptr)); \
__ret; \
})
#define arc_write_uncached_32(ptr, data)\
({ \
__asm__ __volatile__( \
" st.di %0, [%1] \n" \
: \
: "r"(data), "r"(ptr)); \
})
/* used to give SHMLBA a value to avoid Cache Aliasing */
extern unsigned int ARC_shmlba;
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
/*
* ARC700 doesn't cache any access in top 256M.
* Ideal for wiring memory mapped peripherals as we don't need to do
* explicit uncached accesses (LD.di/ST.di) hence more portable drivers
*/
#define ARC_UNCACHED_ADDR_SPACE 0xc0000000
extern void arc_cache_init(void);
extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len);
extern void __init read_decode_cache_bcr(void);
#endif
#endif /* _ASM_CACHE_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
* -flush_cache_dup_mm (fork)
* -likewise for flush_cache_mm (exit/execve)
* -likewise for flush_cache_{range,page} (munmap, exit, COW-break)
*
* vineetg: April 2008
* -Added a critical CacheLine flush to copy_to_user_page( ) which
* was causing gdbserver to not setup breakpoints consistently
*/
#ifndef _ASM_CACHEFLUSH_H
#define _ASM_CACHEFLUSH_H
#include <linux/mm.h>
void flush_cache_all(void);
void flush_icache_range(unsigned long start, unsigned long end);
void flush_icache_page(struct vm_area_struct *vma, struct page *page);
void flush_icache_range_vaddr(unsigned long paddr, unsigned long u_vaddr,
int len);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
void flush_dcache_page(struct page *page);
void dma_cache_wback_inv(unsigned long start, unsigned long sz);
void dma_cache_inv(unsigned long start, unsigned long sz);
void dma_cache_wback(unsigned long start, unsigned long sz);
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
/* TBD: optimize this */
#define flush_cache_vmap(start, end) flush_cache_all()
#define flush_cache_vunmap(start, end) flush_cache_all()
/*
* VM callbacks when entire/range of user-space V-P mappings are
* torn-down/get-invalidated
*
* Currently we don't support D$ aliasing configs for our VIPT caches
* NOPS for VIPT Cache with non-aliasing D$ configurations only
*/
#define flush_cache_dup_mm(mm) /* called on fork */
#define flush_cache_mm(mm) /* called on munmap/exit */
#define flush_cache_range(mm, u_vstart, u_vend)
#define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy(dst, src, len); \
if (vma->vm_flags & VM_EXEC) \
flush_icache_range_vaddr((unsigned long)(dst), vaddr, len);\
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len); \
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Joern Rennecke <joern.rennecke@embecosm.com>: Jan 2012
* -Insn Scheduling improvements to csum core routines.
* = csum_fold( ) largely derived from ARM version.
* = ip_fast_cum( ) to have module scheduling
* -gcc 4.4.x broke networking. Alias analysis needed to be primed.
* worked around by adding memory clobber to ip_fast_csum( )
*
* vineetg: May 2010
* -Rewrote ip_fast_cscum( ) and csum_fold( ) with fast inline asm
*/
#ifndef _ASM_ARC_CHECKSUM_H
#define _ASM_ARC_CHECKSUM_H
/*
* Fold a partial checksum
*
* The 2 swords comprising the 32bit sum are added, any carry to 16th bit
* added back and final sword result inverted.
*/
static inline __sum16 csum_fold(__wsum s)
{
unsigned r = s << 16 | s >> 16; /* ror */
s = ~s;
s -= r;
return s >> 16;
}
/*
* This is a version of ip_compute_csum() optimized for IP headers,
* which always checksum on 4 octet boundaries.
*/
static inline __sum16
ip_fast_csum(const void *iph, unsigned int ihl)
{
const void *ptr = iph;
unsigned int tmp, tmp2, sum;
__asm__(
" ld.ab %0, [%3, 4] \n"
" ld.ab %2, [%3, 4] \n"
" sub %1, %4, 2 \n"
" lsr.f lp_count, %1, 1 \n"
" bcc 0f \n"
" add.f %0, %0, %2 \n"
" ld.ab %2, [%3, 4] \n"
"0: lp 1f \n"
" ld.ab %1, [%3, 4] \n"
" adc.f %0, %0, %2 \n"
" ld.ab %2, [%3, 4] \n"
" adc.f %0, %0, %1 \n"
"1: adc.f %0, %0, %2 \n"
" add.cs %0,%0,1 \n"
: "=&r"(sum), "=r"(tmp), "=&r"(tmp2), "+&r" (ptr)
: "r"(ihl)
: "cc", "lp_count", "memory");
return csum_fold(sum);
}
/*
* TCP pseudo Header is 12 bytes:
* SA [4], DA [4], zeroes [1], Proto[1], TCP Seg(hdr+data) Len [2]
*/
static inline __wsum
csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
unsigned short proto, __wsum sum)
{
__asm__ __volatile__(
" add.f %0, %0, %1 \n"
" adc.f %0, %0, %2 \n"
" adc.f %0, %0, %3 \n"
" adc.f %0, %0, %4 \n"
" adc %0, %0, 0 \n"
: "+&r"(sum)
: "r"(saddr), "r"(daddr),
#ifdef CONFIG_CPU_BIG_ENDIAN
"r"(len),
#else
"r"(len << 8),
#endif
"r"(htons(proto))
: "cc");
return sum;
}
#define csum_fold csum_fold
#define ip_fast_csum ip_fast_csum
#define csum_tcpudp_nofold csum_tcpudp_nofold
#include <asm-generic/checksum.h>
#endif /* _ASM_ARC_CHECKSUM_H */

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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_CLK_H
#define _ASM_ARC_CLK_H
/* Although we can't really hide core_freq, the accessor is still better way */
extern unsigned long core_freq;
static inline unsigned long arc_get_core_freq(void)
{
return core_freq;
}
extern int arc_set_core_freq(unsigned long);
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_CMPXCHG_H
#define __ASM_ARC_CMPXCHG_H
#include <linux/types.h>
#include <asm/smp.h>
#ifdef CONFIG_ARC_HAS_LLSC
static inline unsigned long
__cmpxchg(volatile void *ptr, unsigned long expected, unsigned long new)
{
unsigned long prev;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" brne %0, %2, 2f \n"
" scond %3, [%1] \n"
" bnz 1b \n"
"2: \n"
: "=&r"(prev)
: "r"(ptr), "ir"(expected),
"r"(new) /* can't be "ir". scond can't take limm for "b" */
: "cc");
return prev;
}
#else
static inline unsigned long
__cmpxchg(volatile void *ptr, unsigned long expected, unsigned long new)
{
unsigned long flags;
int prev;
volatile unsigned long *p = ptr;
atomic_ops_lock(flags);
prev = *p;
if (prev == expected)
*p = new;
atomic_ops_unlock(flags);
return prev;
}
#endif /* CONFIG_ARC_HAS_LLSC */
#define cmpxchg(ptr, o, n) ((typeof(*(ptr)))__cmpxchg((ptr), \
(unsigned long)(o), (unsigned long)(n)))
/*
* Since not supported natively, ARC cmpxchg() uses atomic_ops_lock (UP/SMP)
* just to gaurantee semantics.
* atomic_cmpxchg() needs to use the same locks as it's other atomic siblings
* which also happens to be atomic_ops_lock.
*
* Thus despite semantically being different, implementation of atomic_cmpxchg()
* is same as cmpxchg().
*/
#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
/*
* xchg (reg with memory) based on "Native atomic" EX insn
*/
static inline unsigned long __xchg(unsigned long val, volatile void *ptr,
int size)
{
extern unsigned long __xchg_bad_pointer(void);
switch (size) {
case 4:
__asm__ __volatile__(
" ex %0, [%1] \n"
: "+r"(val)
: "r"(ptr)
: "memory");
return val;
}
return __xchg_bad_pointer();
}
#define _xchg(ptr, with) ((typeof(*(ptr)))__xchg((unsigned long)(with), (ptr), \
sizeof(*(ptr))))
/*
* On ARC700, EX insn is inherently atomic, so by default "vanilla" xchg() need
* not require any locking. However there's a quirk.
* ARC lacks native CMPXCHG, thus emulated (see above), using external locking -
* incidently it "reuses" the same atomic_ops_lock used by atomic APIs.
* Now, llist code uses cmpxchg() and xchg() on same data, so xchg() needs to
* abide by same serializing rules, thus ends up using atomic_ops_lock as well.
*
* This however is only relevant if SMP and/or ARC lacks LLSC
* if (UP or LLSC)
* xchg doesn't need serialization
* else <==> !(UP or LLSC) <==> (!UP and !LLSC) <==> (SMP and !LLSC)
* xchg needs serialization
*/
#if !defined(CONFIG_ARC_HAS_LLSC) && defined(CONFIG_SMP)
#define xchg(ptr, with) \
({ \
unsigned long flags; \
typeof(*(ptr)) old_val; \
\
atomic_ops_lock(flags); \
old_val = _xchg(ptr, with); \
atomic_ops_unlock(flags); \
old_val; \
})
#else
#define xchg(ptr, with) _xchg(ptr, with)
#endif
/*
* "atomic" variant of xchg()
* REQ: It needs to follow the same serialization rules as other atomic_xxx()
* Since xchg() doesn't always do that, it would seem that following defintion
* is incorrect. But here's the rationale:
* SMP : Even xchg() takes the atomic_ops_lock, so OK.
* LLSC: atomic_ops_lock are not relevent at all (even if SMP, since LLSC
* is natively "SMP safe", no serialization required).
* UP : other atomics disable IRQ, so no way a difft ctxt atomic_xchg()
* could clobber them. atomic_xchg() itself would be 1 insn, so it
* can't be clobbered by others. Thus no serialization required when
* atomic_xchg is involved.
*/
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Vineetg: May 16th, 2008
* - Current macro is now implemented as "global register" r25
*/
#ifndef _ASM_ARC_CURRENT_H
#define _ASM_ARC_CURRENT_H
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#ifdef CONFIG_ARC_CURR_IN_REG
register struct task_struct *curr_arc asm("r25");
#define current (curr_arc)
#else
#include <asm-generic/current.h>
#endif /* ! CONFIG_ARC_CURR_IN_REG */
#endif /* ! __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_ARC_CURRENT_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ARC_ASM_DEFINES_H__
#define __ARC_ASM_DEFINES_H__
#if defined(CONFIG_ARC_MMU_V1)
#define CONFIG_ARC_MMU_VER 1
#elif defined(CONFIG_ARC_MMU_V2)
#define CONFIG_ARC_MMU_VER 2
#elif defined(CONFIG_ARC_MMU_V3)
#define CONFIG_ARC_MMU_VER 3
#endif
#ifdef CONFIG_ARC_HAS_LLSC
#define __CONFIG_ARC_HAS_LLSC_VAL 1
#else
#define __CONFIG_ARC_HAS_LLSC_VAL 0
#endif
#ifdef CONFIG_ARC_HAS_SWAPE
#define __CONFIG_ARC_HAS_SWAPE_VAL 1
#else
#define __CONFIG_ARC_HAS_SWAPE_VAL 0
#endif
#ifdef CONFIG_ARC_HAS_RTSC
#define __CONFIG_ARC_HAS_RTSC_VAL 1
#else
#define __CONFIG_ARC_HAS_RTSC_VAL 0
#endif
#ifdef CONFIG_ARC_MMU_SASID
#define __CONFIG_ARC_MMU_SASID_VAL 1
#else
#define __CONFIG_ARC_MMU_SASID_VAL 0
#endif
#ifdef CONFIG_ARC_HAS_ICACHE
#define __CONFIG_ARC_HAS_ICACHE 1
#else
#define __CONFIG_ARC_HAS_ICACHE 0
#endif
#ifdef CONFIG_ARC_HAS_DCACHE
#define __CONFIG_ARC_HAS_DCACHE 1
#else
#define __CONFIG_ARC_HAS_DCACHE 0
#endif
#endif /* __ARC_ASM_DEFINES_H__ */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Delay routines using pre computed loops_per_jiffy value.
*
* vineetg: Feb 2012
* -Rewrote in "C" to avoid dealing with availability of H/w MPY
* -Also reduced the num of MPY operations from 3 to 2
*
* Amit Bhor: Codito Technologies 2004
*/
#ifndef __ASM_ARC_UDELAY_H
#define __ASM_ARC_UDELAY_H
#include <asm/param.h> /* HZ */
static inline void __delay(unsigned long loops)
{
__asm__ __volatile__(
"1: sub.f %0, %0, 1 \n"
" jpnz 1b \n"
: "+r"(loops)
:
: "cc");
}
extern void __bad_udelay(void);
/*
* Normal Math for computing loops in "N" usecs
* -we have precomputed @loops_per_jiffy
* -1 sec has HZ jiffies
* loops per "N" usecs = ((loops_per_jiffy * HZ / 1000000) * N)
*
* Approximate Division by multiplication:
* -Mathematically if we multiply and divide a number by same value the
* result remains unchanged: In this case, we use 2^32
* -> (loops_per_N_usec * 2^32 ) / 2^32
* -> (((loops_per_jiffy * HZ / 1000000) * N) * 2^32) / 2^32
* -> (loops_per_jiffy * HZ * N * 4295) / 2^32
*
* -Divide by 2^32 is very simply right shift by 32
* -We simply need to ensure that the multiply per above eqn happens in
* 64-bit precision (if CPU doesn't support it - gcc can emaulate it)
*/
static inline void __udelay(unsigned long usecs)
{
unsigned long loops;
/* (long long) cast ensures 64 bit MPY - real or emulated
* HZ * 4295 is pre-evaluated by gcc - hence only 2 mpy ops
*/
loops = ((long long)(usecs * 4295 * HZ) *
(long long)(loops_per_jiffy)) >> 32;
__delay(loops);
}
#define udelay(n) (__builtin_constant_p(n) ? ((n) > 20000 ? __bad_udelay() \
: __udelay(n)) : __udelay(n))
#endif /* __ASM_ARC_UDELAY_H */

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/*
* several functions that help interpret ARC instructions
* used for unaligned accesses, kprobes and kgdb
*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ARC_DISASM_H__
#define __ARC_DISASM_H__
enum {
op_Bcc = 0, op_BLcc = 1, op_LD = 2, op_ST = 3, op_MAJOR_4 = 4,
op_MAJOR_5 = 5, op_LD_ADD = 12, op_ADD_SUB_SHIFT = 13,
op_ADD_MOV_CMP = 14, op_S = 15, op_LD_S = 16, op_LDB_S = 17,
op_LDW_S = 18, op_LDWX_S = 19, op_ST_S = 20, op_STB_S = 21,
op_STW_S = 22, op_Su5 = 23, op_SP = 24, op_GP = 25,
op_Pcl = 26, op_MOV_S = 27, op_ADD_CMP = 28, op_BR_S = 29,
op_B_S = 30, op_BL_S = 31
};
enum flow {
noflow,
direct_jump,
direct_call,
indirect_jump,
indirect_call,
invalid_instr
};
#define IS_BIT(word, n) ((word) & (1<<n))
#define BITS(word, s, e) (((word) >> (s)) & (~((-2) << ((e) - (s)))))
#define MAJOR_OPCODE(word) (BITS((word), 27, 31))
#define MINOR_OPCODE(word) (BITS((word), 16, 21))
#define FIELD_A(word) (BITS((word), 0, 5))
#define FIELD_B(word) ((BITS((word), 12, 14)<<3) | \
(BITS((word), 24, 26)))
#define FIELD_C(word) (BITS((word), 6, 11))
#define FIELD_u6(word) FIELDC(word)
#define FIELD_s12(word) sign_extend(((BITS((word), 0, 5) << 6) | \
BITS((word), 6, 11)), 12)
/* note that for BL/BRcc these two macro's need another AND statement to mask
* out bit 1 (make the result a multiple of 4) */
#define FIELD_s9(word) sign_extend(((BITS(word, 15, 15) << 8) | \
BITS(word, 16, 23)), 9)
#define FIELD_s21(word) sign_extend(((BITS(word, 6, 15) << 11) | \
(BITS(word, 17, 26) << 1)), 12)
#define FIELD_s25(word) sign_extend(((BITS(word, 0, 3) << 21) | \
(BITS(word, 6, 15) << 11) | \
(BITS(word, 17, 26) << 1)), 12)
/* note: these operate on 16 bits! */
#define FIELD_S_A(word) ((BITS((word), 2, 2)<<3) | BITS((word), 0, 2))
#define FIELD_S_B(word) ((BITS((word), 10, 10)<<3) | \
BITS((word), 8, 10))
#define FIELD_S_C(word) ((BITS((word), 7, 7)<<3) | BITS((word), 5, 7))
#define FIELD_S_H(word) ((BITS((word), 0, 2)<<3) | BITS((word), 5, 8))
#define FIELD_S_u5(word) (BITS((word), 0, 4))
#define FIELD_S_u6(word) (BITS((word), 0, 4) << 1)
#define FIELD_S_u7(word) (BITS((word), 0, 4) << 2)
#define FIELD_S_u10(word) (BITS((word), 0, 7) << 2)
#define FIELD_S_s7(word) sign_extend(BITS((word), 0, 5) << 1, 9)
#define FIELD_S_s8(word) sign_extend(BITS((word), 0, 7) << 1, 9)
#define FIELD_S_s9(word) sign_extend(BITS((word), 0, 8), 9)
#define FIELD_S_s10(word) sign_extend(BITS((word), 0, 8) << 1, 10)
#define FIELD_S_s11(word) sign_extend(BITS((word), 0, 8) << 2, 11)
#define FIELD_S_s13(word) sign_extend(BITS((word), 0, 10) << 2, 13)
#define STATUS32_L 0x00000100
#define REG_LIMM 62
struct disasm_state {
/* generic info */
unsigned long words[2];
int instr_len;
int major_opcode;
/* info for branch/jump */
int is_branch;
int target;
int delay_slot;
enum flow flow;
/* info for load/store */
int src1, src2, src3, dest, wb_reg;
int zz, aa, x, pref, di;
int fault, write;
};
static inline int sign_extend(int value, int bits)
{
if (IS_BIT(value, (bits - 1)))
value |= (0xffffffff << bits);
return value;
}
static inline int is_short_instr(unsigned long addr)
{
uint16_t word = *((uint16_t *)addr);
int opcode = (word >> 11) & 0x1F;
return (opcode >= 0x0B);
}
void disasm_instr(unsigned long addr, struct disasm_state *state,
int userspace, struct pt_regs *regs, struct callee_regs *cregs);
int disasm_next_pc(unsigned long pc, struct pt_regs *regs, struct callee_regs
*cregs, unsigned long *fall_thru, unsigned long *target);
long get_reg(int reg, struct pt_regs *regs, struct callee_regs *cregs);
void set_reg(int reg, long val, struct pt_regs *regs,
struct callee_regs *cregs);
#endif /* __ARC_DISASM_H__ */

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/*
* DMA Mapping glue for ARC
*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef ASM_ARC_DMA_MAPPING_H
#define ASM_ARC_DMA_MAPPING_H
#include <asm-generic/dma-coherent.h>
#include <asm/cacheflush.h>
#ifndef CONFIG_ARC_PLAT_NEEDS_CPU_TO_DMA
/*
* dma_map_* API take cpu addresses, which is kernel logical address in the
* untranslated address space (0x8000_0000) based. The dma address (bus addr)
* ideally needs to be 0x0000_0000 based hence these glue routines.
* However given that intermediate bus bridges can ignore the high bit, we can
* do with these routines being no-ops.
* If a platform/device comes up which sriclty requires 0 based bus addr
* (e.g. AHB-PCI bridge on Angel4 board), then it can provide it's own versions
*/
#define plat_dma_addr_to_kernel(dev, addr) ((unsigned long)(addr))
#define plat_kernel_addr_to_dma(dev, ptr) ((dma_addr_t)(ptr))
#else
#include <plat/dma_addr.h>
#endif
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle);
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
void dma_free_coherent(struct device *dev, size_t size, void *kvaddr,
dma_addr_t dma_handle);
/* drivers/base/dma-mapping.c */
extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size);
extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t dma_addr,
size_t size);
#define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s)
#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
/*
* streaming DMA Mapping API...
* CPU accesses page via normal paddr, thus needs to explicitly made
* consistent before each use
*/
static inline void __inline_dma_cache_sync(unsigned long paddr, size_t size,
enum dma_data_direction dir)
{
switch (dir) {
case DMA_FROM_DEVICE:
dma_cache_inv(paddr, size);
break;
case DMA_TO_DEVICE:
dma_cache_wback(paddr, size);
break;
case DMA_BIDIRECTIONAL:
dma_cache_wback_inv(paddr, size);
break;
default:
pr_err("Invalid DMA dir [%d] for OP @ %lx\n", dir, paddr);
}
}
void __arc_dma_cache_sync(unsigned long paddr, size_t size,
enum dma_data_direction dir);
#define _dma_cache_sync(addr, sz, dir) \
do { \
if (__builtin_constant_p(dir)) \
__inline_dma_cache_sync(addr, sz, dir); \
else \
__arc_dma_cache_sync(addr, sz, dir); \
} \
while (0);
static inline dma_addr_t
dma_map_single(struct device *dev, void *cpu_addr, size_t size,
enum dma_data_direction dir)
{
_dma_cache_sync((unsigned long)cpu_addr, size, dir);
return plat_kernel_addr_to_dma(dev, cpu_addr);
}
static inline void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir)
{
}
static inline dma_addr_t
dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
unsigned long paddr = page_to_phys(page) + offset;
return dma_map_single(dev, (void *)paddr, size, dir);
}
static inline void
dma_unmap_page(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
}
static inline int
dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir)
{
struct scatterlist *s;
int i;
for_each_sg(sg, s, nents, i)
sg->dma_address = dma_map_page(dev, sg_page(s), s->offset,
s->length, dir);
return nents;
}
static inline void
dma_unmap_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir)
{
struct scatterlist *s;
int i;
for_each_sg(sg, s, nents, i)
dma_unmap_page(dev, sg_dma_address(s), sg_dma_len(s), dir);
}
static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size,
DMA_FROM_DEVICE);
}
static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size,
DMA_TO_DEVICE);
}
static inline void
dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset,
size, DMA_FROM_DEVICE);
}
static inline void
dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset,
size, DMA_TO_DEVICE);
}
static inline void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction dir)
{
int i;
for (i = 0; i < nelems; i++, sg++)
_dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir);
}
static inline void
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction dir)
{
int i;
for (i = 0; i < nelems; i++, sg++)
_dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir);
}
static inline int dma_supported(struct device *dev, u64 dma_mask)
{
/* Support 32 bit DMA mask exclusively */
return dma_mask == DMA_BIT_MASK(32);
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
static inline int dma_set_mask(struct device *dev, u64 dma_mask)
{
if (!dev->dma_mask || !dma_supported(dev, dma_mask))
return -EIO;
*dev->dma_mask = dma_mask;
return 0;
}
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef ASM_ARC_DMA_H
#define ASM_ARC_DMA_H
#define MAX_DMA_ADDRESS 0xC0000000
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_ELF_H
#define __ASM_ARC_ELF_H
#include <linux/types.h>
#include <uapi/asm/elf.h>
/* These ELF defines belong to uapi but libc elf.h already defines them */
#define EM_ARCOMPACT 93
/* ARC Relocations (kernel Modules only) */
#define R_ARC_32 0x4
#define R_ARC_32_ME 0x1B
#define R_ARC_S25H_PCREL 0x10
#define R_ARC_S25W_PCREL 0x11
/*to set parameters in the core dumps */
#define ELF_ARCH EM_ARCOMPACT
#define ELF_CLASS ELFCLASS32
#ifdef CONFIG_CPU_BIG_ENDIAN
#define ELF_DATA ELFDATA2MSB
#else
#define ELF_DATA ELFDATA2LSB
#endif
/*
* To ensure that
* -we don't load something for the wrong architecture.
* -The userspace is using the correct syscall ABI
*/
struct elf32_hdr;
extern int elf_check_arch(const struct elf32_hdr *);
#define elf_check_arch elf_check_arch
#define CORE_DUMP_USE_REGSET
#define ELF_EXEC_PAGESIZE PAGE_SIZE
/*
* This is the location that an ET_DYN program is loaded if exec'ed. Typical
* use of this is to invoke "./ld.so someprog" to test out a new version of
* the loader. We need to make sure that it is out of the way of the program
* that it will "exec", and that there is sufficient room for the brk.
*/
#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
/*
* When the program starts, a1 contains a pointer to a function to be
* registered with atexit, as per the SVR4 ABI. A value of 0 means we
* have no such handler.
*/
#define ELF_PLAT_INIT(_r, load_addr) ((_r)->r0 = 0)
/*
* This yields a mask that user programs can use to figure out what
* instruction set this cpu supports.
*/
#define ELF_HWCAP (0)
/*
* This yields a string that ld.so will use to load implementation
* specific libraries for optimization. This is more specific in
* intent than poking at uname or /proc/cpuinfo.
*/
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Vineetg: March 2009 (Supporting 2 levels of Interrupts)
* Stack switching code can no longer reliably rely on the fact that
* if we are NOT in user mode, stack is switched to kernel mode.
* e.g. L2 IRQ interrupted a L1 ISR which had not yet completed
* it's prologue including stack switching from user mode
*
* Vineetg: Aug 28th 2008: Bug #94984
* -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
* Normally CPU does this automatically, however when doing FAKE rtie,
* we also need to explicitly do this. The problem in macros
* FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
* was being "CLEARED" rather then "SET". Actually "SET" clears ZOL context
*
* Vineetg: May 5th 2008
* -Modified CALLEE_REG save/restore macros to handle the fact that
* r25 contains the kernel current task ptr
* - Defined Stack Switching Macro to be reused in all intr/excp hdlrs
* - Shaved off 11 instructions from RESTORE_ALL_INT1 by using the
* address Write back load ld.ab instead of seperate ld/add instn
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef __ASM_ARC_ENTRY_H
#define __ASM_ARC_ENTRY_H
#ifdef __ASSEMBLY__
#include <asm/unistd.h> /* For NR_syscalls defination */
#include <asm/asm-offsets.h>
#include <asm/arcregs.h>
#include <asm/ptrace.h>
#include <asm/processor.h> /* For VMALLOC_START */
#include <asm/thread_info.h> /* For THREAD_SIZE */
/* Note on the LD/ST addr modes with addr reg wback
*
* LD.a same as LD.aw
*
* LD.a reg1, [reg2, x] => Pre Incr
* Eff Addr for load = [reg2 + x]
*
* LD.ab reg1, [reg2, x] => Post Incr
* Eff Addr for load = [reg2]
*/
/*--------------------------------------------------------------
* Save caller saved registers (scratch registers) ( r0 - r12 )
* Registers are pushed / popped in the order defined in struct ptregs
* in asm/ptrace.h
*-------------------------------------------------------------*/
.macro SAVE_CALLER_SAVED
st.a r0, [sp, -4]
st.a r1, [sp, -4]
st.a r2, [sp, -4]
st.a r3, [sp, -4]
st.a r4, [sp, -4]
st.a r5, [sp, -4]
st.a r6, [sp, -4]
st.a r7, [sp, -4]
st.a r8, [sp, -4]
st.a r9, [sp, -4]
st.a r10, [sp, -4]
st.a r11, [sp, -4]
st.a r12, [sp, -4]
.endm
/*--------------------------------------------------------------
* Restore caller saved registers (scratch registers)
*-------------------------------------------------------------*/
.macro RESTORE_CALLER_SAVED
ld.ab r12, [sp, 4]
ld.ab r11, [sp, 4]
ld.ab r10, [sp, 4]
ld.ab r9, [sp, 4]
ld.ab r8, [sp, 4]
ld.ab r7, [sp, 4]
ld.ab r6, [sp, 4]
ld.ab r5, [sp, 4]
ld.ab r4, [sp, 4]
ld.ab r3, [sp, 4]
ld.ab r2, [sp, 4]
ld.ab r1, [sp, 4]
ld.ab r0, [sp, 4]
.endm
/*--------------------------------------------------------------
* Save callee saved registers (non scratch registers) ( r13 - r25 )
* on kernel stack.
* User mode callee regs need to be saved in case of
* -fork and friends for replicating from parent to child
* -before going into do_signal( ) for ptrace/core-dump
* Special case handling is required for r25 in case it is used by kernel
* for caching task ptr. Low level exception/ISR save user mode r25
* into task->thread.user_r25. So it needs to be retrieved from there and
* saved into kernel stack with rest of callee reg-file
*-------------------------------------------------------------*/
.macro SAVE_CALLEE_SAVED_USER
st.a r13, [sp, -4]
st.a r14, [sp, -4]
st.a r15, [sp, -4]
st.a r16, [sp, -4]
st.a r17, [sp, -4]
st.a r18, [sp, -4]
st.a r19, [sp, -4]
st.a r20, [sp, -4]
st.a r21, [sp, -4]
st.a r22, [sp, -4]
st.a r23, [sp, -4]
st.a r24, [sp, -4]
#ifdef CONFIG_ARC_CURR_IN_REG
; Retrieve orig r25 and save it on stack
ld r12, [r25, TASK_THREAD + THREAD_USER_R25]
st.a r12, [sp, -4]
#else
st.a r25, [sp, -4]
#endif
/* move up by 1 word to "create" callee_regs->"stack_place_holder" */
sub sp, sp, 4
.endm
/*--------------------------------------------------------------
* Save callee saved registers (non scratch registers) ( r13 - r25 )
* kernel mode callee regs needed to be saved in case of context switch
* If r25 is used for caching task pointer then that need not be saved
* as it can be re-created from current task global
*-------------------------------------------------------------*/
.macro SAVE_CALLEE_SAVED_KERNEL
st.a r13, [sp, -4]
st.a r14, [sp, -4]
st.a r15, [sp, -4]
st.a r16, [sp, -4]
st.a r17, [sp, -4]
st.a r18, [sp, -4]
st.a r19, [sp, -4]
st.a r20, [sp, -4]
st.a r21, [sp, -4]
st.a r22, [sp, -4]
st.a r23, [sp, -4]
st.a r24, [sp, -4]
#ifdef CONFIG_ARC_CURR_IN_REG
sub sp, sp, 8
#else
st.a r25, [sp, -4]
sub sp, sp, 4
#endif
.endm
/*--------------------------------------------------------------
* RESTORE_CALLEE_SAVED_KERNEL:
* Loads callee (non scratch) Reg File by popping from Kernel mode stack.
* This is reverse of SAVE_CALLEE_SAVED,
*
* NOTE:
* Ideally this shd only be called in switch_to for loading
* switched-IN task's CALLEE Reg File.
* For all other cases RESTORE_CALLEE_SAVED_FAST must be used
* which simply pops the stack w/o touching regs.
*-------------------------------------------------------------*/
.macro RESTORE_CALLEE_SAVED_KERNEL
#ifdef CONFIG_ARC_CURR_IN_REG
add sp, sp, 8 /* skip callee_reg gutter and user r25 placeholder */
#else
add sp, sp, 4 /* skip "callee_regs->stack_place_holder" */
ld.ab r25, [sp, 4]
#endif
ld.ab r24, [sp, 4]
ld.ab r23, [sp, 4]
ld.ab r22, [sp, 4]
ld.ab r21, [sp, 4]
ld.ab r20, [sp, 4]
ld.ab r19, [sp, 4]
ld.ab r18, [sp, 4]
ld.ab r17, [sp, 4]
ld.ab r16, [sp, 4]
ld.ab r15, [sp, 4]
ld.ab r14, [sp, 4]
ld.ab r13, [sp, 4]
.endm
/*--------------------------------------------------------------
* RESTORE_CALLEE_SAVED_USER:
* This is called after do_signal where tracer might have changed callee regs
* thus we need to restore the reg file.
* Special case handling is required for r25 in case it is used by kernel
* for caching task ptr. Ptrace would have modified on-kernel-stack value of
* r25, which needs to be shoved back into task->thread.user_r25 where from
* Low level exception/ISR return code will retrieve to populate with rest of
* callee reg-file.
*-------------------------------------------------------------*/
.macro RESTORE_CALLEE_SAVED_USER
add sp, sp, 4 /* skip "callee_regs->stack_place_holder" */
#ifdef CONFIG_ARC_CURR_IN_REG
ld.ab r12, [sp, 4]
st r12, [r25, TASK_THREAD + THREAD_USER_R25]
#else
ld.ab r25, [sp, 4]
#endif
ld.ab r24, [sp, 4]
ld.ab r23, [sp, 4]
ld.ab r22, [sp, 4]
ld.ab r21, [sp, 4]
ld.ab r20, [sp, 4]
ld.ab r19, [sp, 4]
ld.ab r18, [sp, 4]
ld.ab r17, [sp, 4]
ld.ab r16, [sp, 4]
ld.ab r15, [sp, 4]
ld.ab r14, [sp, 4]
ld.ab r13, [sp, 4]
.endm
/*--------------------------------------------------------------
* Super FAST Restore callee saved regs by simply re-adjusting SP
*-------------------------------------------------------------*/
.macro DISCARD_CALLEE_SAVED_USER
add sp, sp, 14 * 4
.endm
/*--------------------------------------------------------------
* Restore User mode r25 saved in task_struct->thread.user_r25
*-------------------------------------------------------------*/
.macro RESTORE_USER_R25
ld r25, [r25, TASK_THREAD + THREAD_USER_R25]
.endm
/*-------------------------------------------------------------
* given a tsk struct, get to the base of it's kernel mode stack
* tsk->thread_info is really a PAGE, whose bottom hoists stack
* which grows upwards towards thread_info
*------------------------------------------------------------*/
.macro GET_TSK_STACK_BASE tsk, out
/* Get task->thread_info (this is essentially start of a PAGE) */
ld \out, [\tsk, TASK_THREAD_INFO]
/* Go to end of page where stack begins (grows upwards) */
add2 \out, \out, (THREAD_SIZE - 4)/4 /* one word GUTTER */
.endm
/*--------------------------------------------------------------
* Switch to Kernel Mode stack if SP points to User Mode stack
*
* Entry : r9 contains pre-IRQ/exception/trap status32
* Exit : SP is set to kernel mode stack pointer
* If CURR_IN_REG, r25 set to "current" task pointer
* Clobbers: r9
*-------------------------------------------------------------*/
.macro SWITCH_TO_KERNEL_STK
/* User Mode when this happened ? Yes: Proceed to switch stack */
bbit1 r9, STATUS_U_BIT, 88f
/* OK we were already in kernel mode when this event happened, thus can
* assume SP is kernel mode SP. _NO_ need to do any stack switching
*/
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
/* However....
* If Level 2 Interrupts enabled, we may end up with a corner case:
* 1. User Task executing
* 2. L1 IRQ taken, ISR starts (CPU auto-switched to KERNEL mode)
* 3. But before it could switch SP from USER to KERNEL stack
* a L2 IRQ "Interrupts" L1
* Thay way although L2 IRQ happened in Kernel mode, stack is still
* not switched.
* To handle this, we may need to switch stack even if in kernel mode
* provided SP has values in range of USER mode stack ( < 0x7000_0000 )
*/
brlo sp, VMALLOC_START, 88f
/* TODO: vineetg:
* We need to be a bit more cautious here. What if a kernel bug in
* L1 ISR, caused SP to go whaco (some small value which looks like
* USER stk) and then we take L2 ISR.
* Above brlo alone would treat it as a valid L1-L2 sceanrio
* instead of shouting alound
* The only feasible way is to make sure this L2 happened in
* L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in
* L1 ISR before it switches stack
*/
#endif
/* Save Pre Intr/Exception KERNEL MODE SP on kernel stack
* safe-keeping not really needed, but it keeps the epilogue code
* (SP restore) simpler/uniform.
*/
b.d 77f
st.a sp, [sp, -12] ; Make room for orig_r0 and orig_r8
88: /*------Intr/Ecxp happened in user mode, "switch" stack ------ */
GET_CURR_TASK_ON_CPU r9
#ifdef CONFIG_ARC_CURR_IN_REG
/* If current task pointer cached in r25, time to
* -safekeep USER r25 in task->thread_struct->user_r25
* -load r25 with current task ptr
*/
st.as r25, [r9, (TASK_THREAD + THREAD_USER_R25)/4]
mov r25, r9
#endif
/* With current tsk in r9, get it's kernel mode stack base */
GET_TSK_STACK_BASE r9, r9
#ifdef PT_REGS_CANARY
st 0xabcdabcd, [r9, 0]
#endif
/* Save Pre Intr/Exception User SP on kernel stack */
st.a sp, [r9, -12] ; Make room for orig_r0 and orig_r8
/* CAUTION:
* SP should be set at the very end when we are done with everything
* In case of 2 levels of interrupt we depend on value of SP to assume
* that everything else is done (loading r25 etc)
*/
/* set SP to point to kernel mode stack */
mov sp, r9
77: /* ----- Stack Switched to kernel Mode, Now save REG FILE ----- */
.endm
/*------------------------------------------------------------
* "FAKE" a rtie to return from CPU Exception context
* This is to re-enable Exceptions within exception
* Look at EV_ProtV to see how this is actually used
*-------------------------------------------------------------*/
.macro FAKE_RET_FROM_EXCPN reg
ld \reg, [sp, PT_status32]
bic \reg, \reg, (STATUS_U_MASK|STATUS_DE_MASK)
bset \reg, \reg, STATUS_L_BIT
sr \reg, [erstatus]
mov \reg, 55f
sr \reg, [eret]
rtie
55:
.endm
/*
* @reg [OUT] &thread_info of "current"
*/
.macro GET_CURR_THR_INFO_FROM_SP reg
and \reg, sp, ~(THREAD_SIZE - 1)
.endm
/*
* @reg [OUT] thread_info->flags of "current"
*/
.macro GET_CURR_THR_INFO_FLAGS reg
GET_CURR_THR_INFO_FROM_SP \reg
ld \reg, [\reg, THREAD_INFO_FLAGS]
.endm
/*--------------------------------------------------------------
* For early Exception Prologue, a core reg is temporarily needed to
* code the rest of prolog (stack switching). This is done by stashing
* it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP).
*
* Before saving the full regfile - this reg is restored back, only
* to be saved again on kernel mode stack, as part of ptregs.
*-------------------------------------------------------------*/
.macro EXCPN_PROLOG_FREEUP_REG reg
#ifdef CONFIG_SMP
sr \reg, [ARC_REG_SCRATCH_DATA0]
#else
st \reg, [@ex_saved_reg1]
#endif
.endm
.macro EXCPN_PROLOG_RESTORE_REG reg
#ifdef CONFIG_SMP
lr \reg, [ARC_REG_SCRATCH_DATA0]
#else
ld \reg, [@ex_saved_reg1]
#endif
.endm
/*--------------------------------------------------------------
* Save all registers used by Exceptions (TLB Miss, Prot-V, Mem err etc)
* Requires SP to be already switched to kernel mode Stack
* sp points to the next free element on the stack at exit of this macro.
* Registers are pushed / popped in the order defined in struct ptregs
* in asm/ptrace.h
* Note that syscalls are implemented via TRAP which is also a exception
* from CPU's point of view
*-------------------------------------------------------------*/
.macro SAVE_ALL_EXCEPTION marker
st \marker, [sp, 8]
st r0, [sp, 4] /* orig_r0, needed only for sys calls */
/* Restore r9 used to code the early prologue */
EXCPN_PROLOG_RESTORE_REG r9
SAVE_CALLER_SAVED
st.a r26, [sp, -4] /* gp */
st.a fp, [sp, -4]
st.a blink, [sp, -4]
lr r9, [eret]
st.a r9, [sp, -4]
lr r9, [erstatus]
st.a r9, [sp, -4]
st.a lp_count, [sp, -4]
lr r9, [lp_end]
st.a r9, [sp, -4]
lr r9, [lp_start]
st.a r9, [sp, -4]
lr r9, [erbta]
st.a r9, [sp, -4]
#ifdef PT_REGS_CANARY
mov r9, 0xdeadbeef
st r9, [sp, -4]
#endif
/* move up by 1 word to "create" pt_regs->"stack_place_holder" */
sub sp, sp, 4
.endm
/*--------------------------------------------------------------
* Save scratch regs for exceptions
*-------------------------------------------------------------*/
.macro SAVE_ALL_SYS
SAVE_ALL_EXCEPTION orig_r8_IS_EXCPN
.endm
/*--------------------------------------------------------------
* Save scratch regs for sys calls
*-------------------------------------------------------------*/
.macro SAVE_ALL_TRAP
/*
* Setup pt_regs->orig_r8.
* Encode syscall number (r8) in upper short word of event type (r9)
* N.B. #1: This is already endian safe (see ptrace.h)
* #2: Only r9 can be used as scratch as it is already clobbered
* and it's contents are no longer needed by the latter part
* of exception prologue
*/
lsl r9, r8, 16
or r9, r9, orig_r8_IS_SCALL
SAVE_ALL_EXCEPTION r9
.endm
/*--------------------------------------------------------------
* Restore all registers used by system call or Exceptions
* SP should always be pointing to the next free stack element
* when entering this macro.
*
* NOTE:
*
* It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
* for memory load operations. If used in that way interrupts are deffered
* by hardware and that is not good.
*-------------------------------------------------------------*/
.macro RESTORE_ALL_SYS
add sp, sp, 4 /* hop over unused "pt_regs->stack_place_holder" */
ld.ab r9, [sp, 4]
sr r9, [erbta]
ld.ab r9, [sp, 4]
sr r9, [lp_start]
ld.ab r9, [sp, 4]
sr r9, [lp_end]
ld.ab r9, [sp, 4]
mov lp_count, r9
ld.ab r9, [sp, 4]
sr r9, [erstatus]
ld.ab r9, [sp, 4]
sr r9, [eret]
ld.ab blink, [sp, 4]
ld.ab fp, [sp, 4]
ld.ab r26, [sp, 4] /* gp */
RESTORE_CALLER_SAVED
ld sp, [sp] /* restore original sp */
/* orig_r0 and orig_r8 skipped automatically */
.endm
/*--------------------------------------------------------------
* Save all registers used by interrupt handlers.
*-------------------------------------------------------------*/
.macro SAVE_ALL_INT1
/* restore original r9 , saved in int1_saved_reg
* It will be saved on stack in macro: SAVE_CALLER_SAVED
*/
#ifdef CONFIG_SMP
lr r9, [ARC_REG_SCRATCH_DATA0]
#else
ld r9, [@int1_saved_reg]
#endif
/* now we are ready to save the remaining context :) */
st orig_r8_IS_IRQ1, [sp, 8] /* Event Type */
st 0, [sp, 4] /* orig_r0 , N/A for IRQ */
SAVE_CALLER_SAVED
st.a r26, [sp, -4] /* gp */
st.a fp, [sp, -4]
st.a blink, [sp, -4]
st.a ilink1, [sp, -4]
lr r9, [status32_l1]
st.a r9, [sp, -4]
st.a lp_count, [sp, -4]
lr r9, [lp_end]
st.a r9, [sp, -4]
lr r9, [lp_start]
st.a r9, [sp, -4]
lr r9, [bta_l1]
st.a r9, [sp, -4]
#ifdef PT_REGS_CANARY
mov r9, 0xdeadbee1
st r9, [sp, -4]
#endif
/* move up by 1 word to "create" pt_regs->"stack_place_holder" */
sub sp, sp, 4
.endm
.macro SAVE_ALL_INT2
/* TODO-vineetg: SMP we can't use global nor can we use
* SCRATCH0 as we do for int1 because while int1 is using
* it, int2 can come
*/
/* retsore original r9 , saved in sys_saved_r9 */
ld r9, [@int2_saved_reg]
/* now we are ready to save the remaining context :) */
st orig_r8_IS_IRQ2, [sp, 8] /* Event Type */
st 0, [sp, 4] /* orig_r0 , N/A for IRQ */
SAVE_CALLER_SAVED
st.a r26, [sp, -4] /* gp */
st.a fp, [sp, -4]
st.a blink, [sp, -4]
st.a ilink2, [sp, -4]
lr r9, [status32_l2]
st.a r9, [sp, -4]
st.a lp_count, [sp, -4]
lr r9, [lp_end]
st.a r9, [sp, -4]
lr r9, [lp_start]
st.a r9, [sp, -4]
lr r9, [bta_l2]
st.a r9, [sp, -4]
#ifdef PT_REGS_CANARY
mov r9, 0xdeadbee2
st r9, [sp, -4]
#endif
/* move up by 1 word to "create" pt_regs->"stack_place_holder" */
sub sp, sp, 4
.endm
/*--------------------------------------------------------------
* Restore all registers used by interrupt handlers.
*
* NOTE:
*
* It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
* for memory load operations. If used in that way interrupts are deffered
* by hardware and that is not good.
*-------------------------------------------------------------*/
.macro RESTORE_ALL_INT1
add sp, sp, 4 /* hop over unused "pt_regs->stack_place_holder" */
ld.ab r9, [sp, 4] /* Actual reg file */
sr r9, [bta_l1]
ld.ab r9, [sp, 4]
sr r9, [lp_start]
ld.ab r9, [sp, 4]
sr r9, [lp_end]
ld.ab r9, [sp, 4]
mov lp_count, r9
ld.ab r9, [sp, 4]
sr r9, [status32_l1]
ld.ab r9, [sp, 4]
mov ilink1, r9
ld.ab blink, [sp, 4]
ld.ab fp, [sp, 4]
ld.ab r26, [sp, 4] /* gp */
RESTORE_CALLER_SAVED
ld sp, [sp] /* restore original sp */
/* orig_r0 and orig_r8 skipped automatically */
.endm
.macro RESTORE_ALL_INT2
add sp, sp, 4 /* hop over unused "pt_regs->stack_place_holder" */
ld.ab r9, [sp, 4]
sr r9, [bta_l2]
ld.ab r9, [sp, 4]
sr r9, [lp_start]
ld.ab r9, [sp, 4]
sr r9, [lp_end]
ld.ab r9, [sp, 4]
mov lp_count, r9
ld.ab r9, [sp, 4]
sr r9, [status32_l2]
ld.ab r9, [sp, 4]
mov ilink2, r9
ld.ab blink, [sp, 4]
ld.ab fp, [sp, 4]
ld.ab r26, [sp, 4] /* gp */
RESTORE_CALLER_SAVED
ld sp, [sp] /* restore original sp */
/* orig_r0 and orig_r8 skipped automatically */
.endm
/* Get CPU-ID of this core */
.macro GET_CPU_ID reg
lr \reg, [identity]
lsr \reg, \reg, 8
bmsk \reg, \reg, 7
.endm
#ifdef CONFIG_SMP
/*-------------------------------------------------
* Retrieve the current running task on this CPU
* 1. Determine curr CPU id.
* 2. Use it to index into _current_task[ ]
*/
.macro GET_CURR_TASK_ON_CPU reg
GET_CPU_ID \reg
ld.as \reg, [@_current_task, \reg]
.endm
/*-------------------------------------------------
* Save a new task as the "current" task on this CPU
* 1. Determine curr CPU id.
* 2. Use it to index into _current_task[ ]
*
* Coded differently than GET_CURR_TASK_ON_CPU (which uses LD.AS)
* because ST r0, [r1, offset] can ONLY have s9 @offset
* while LD can take s9 (4 byte insn) or LIMM (8 byte insn)
*/
.macro SET_CURR_TASK_ON_CPU tsk, tmp
GET_CPU_ID \tmp
add2 \tmp, @_current_task, \tmp
st \tsk, [\tmp]
#ifdef CONFIG_ARC_CURR_IN_REG
mov r25, \tsk
#endif
.endm
#else /* Uniprocessor implementation of macros */
.macro GET_CURR_TASK_ON_CPU reg
ld \reg, [@_current_task]
.endm
.macro SET_CURR_TASK_ON_CPU tsk, tmp
st \tsk, [@_current_task]
#ifdef CONFIG_ARC_CURR_IN_REG
mov r25, \tsk
#endif
.endm
#endif /* SMP / UNI */
/* ------------------------------------------------------------------
* Get the ptr to some field of Current Task at @off in task struct
* -Uses r25 for Current task ptr if that is enabled
*/
#ifdef CONFIG_ARC_CURR_IN_REG
.macro GET_CURR_TASK_FIELD_PTR off, reg
add \reg, r25, \off
.endm
#else
.macro GET_CURR_TASK_FIELD_PTR off, reg
GET_CURR_TASK_ON_CPU \reg
add \reg, \reg, \off
.endm
#endif /* CONFIG_ARC_CURR_IN_REG */
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARC_ENTRY_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_EXEC_H
#define __ASM_ARC_EXEC_H
/* Align to 16b */
#define arch_align_stack(p) ((unsigned long)(p) & ~0xf)
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Vineetg: August 2010: From Android kernel work
*/
#ifndef _ASM_FUTEX_H
#define _ASM_FUTEX_H
#include <linux/futex.h>
#include <linux/preempt.h>
#include <linux/uaccess.h>
#include <asm/errno.h>
#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg)\
\
__asm__ __volatile__( \
"1: ld %1, [%2] \n" \
insn "\n" \
"2: st %0, [%2] \n" \
" mov %0, 0 \n" \
"3: \n" \
" .section .fixup,\"ax\" \n" \
" .align 4 \n" \
"4: mov %0, %4 \n" \
" b 3b \n" \
" .previous \n" \
" .section __ex_table,\"a\" \n" \
" .align 4 \n" \
" .word 1b, 4b \n" \
" .word 2b, 4b \n" \
" .previous \n" \
\
: "=&r" (ret), "=&r" (oldval) \
: "r" (uaddr), "r" (oparg), "ir" (-EFAULT) \
: "cc", "memory")
static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
pagefault_disable(); /* implies preempt_disable() */
switch (op) {
case FUTEX_OP_SET:
__futex_atomic_op("mov %0, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ADD:
__futex_atomic_op("add %0, %1, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_OR:
__futex_atomic_op("or %0, %1, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ANDN:
__futex_atomic_op("bic %0, %1, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_XOR:
__futex_atomic_op("xor %0, %1, %3", ret, oldval, uaddr, oparg);
break;
default:
ret = -ENOSYS;
}
pagefault_enable(); /* subsumes preempt_enable() */
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ:
ret = (oldval == cmparg);
break;
case FUTEX_OP_CMP_NE:
ret = (oldval != cmparg);
break;
case FUTEX_OP_CMP_LT:
ret = (oldval < cmparg);
break;
case FUTEX_OP_CMP_GE:
ret = (oldval >= cmparg);
break;
case FUTEX_OP_CMP_LE:
ret = (oldval <= cmparg);
break;
case FUTEX_OP_CMP_GT:
ret = (oldval > cmparg);
break;
default:
ret = -ENOSYS;
}
}
return ret;
}
/* Compare-xchg with preemption disabled.
* Notes:
* -Best-Effort: Exchg happens only if compare succeeds.
* If compare fails, returns; leaving retry/looping to upper layers
* -successful cmp-xchg: return orig value in @addr (same as cmp val)
* -Compare fails: return orig value in @addr
* -user access r/w fails: return -EFAULT
*/
static inline int
futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval,
u32 newval)
{
u32 val;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
pagefault_disable(); /* implies preempt_disable() */
/* TBD : can use llock/scond */
__asm__ __volatile__(
"1: ld %0, [%3] \n"
" brne %0, %1, 3f \n"
"2: st %2, [%3] \n"
"3: \n"
" .section .fixup,\"ax\" \n"
"4: mov %0, %4 \n"
" b 3b \n"
" .previous \n"
" .section __ex_table,\"a\" \n"
" .align 4 \n"
" .word 1b, 4b \n"
" .word 2b, 4b \n"
" .previous\n"
: "=&r"(val)
: "r"(oldval), "r"(newval), "r"(uaddr), "ir"(-EFAULT)
: "cc", "memory");
pagefault_enable(); /* subsumes preempt_enable() */
*uval = val;
return val;
}
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_IO_H
#define _ASM_ARC_IO_H
#include <linux/types.h>
#include <asm/byteorder.h>
#include <asm/page.h>
#define PCI_IOBASE ((void __iomem *)0)
extern void __iomem *ioremap(unsigned long physaddr, unsigned long size);
extern void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
unsigned long flags);
extern void iounmap(const void __iomem *addr);
#define ioremap_nocache(phy, sz) ioremap(phy, sz)
#define ioremap_wc(phy, sz) ioremap(phy, sz)
/* Change struct page to physical address */
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define __raw_readb __raw_readb
static inline u8 __raw_readb(const volatile void __iomem *addr)
{
u8 b;
__asm__ __volatile__(
" ldb%U1 %0, %1 \n"
: "=r" (b)
: "m" (*(volatile u8 __force *)addr)
: "memory");
return b;
}
#define __raw_readw __raw_readw
static inline u16 __raw_readw(const volatile void __iomem *addr)
{
u16 s;
__asm__ __volatile__(
" ldw%U1 %0, %1 \n"
: "=r" (s)
: "m" (*(volatile u16 __force *)addr)
: "memory");
return s;
}
#define __raw_readl __raw_readl
static inline u32 __raw_readl(const volatile void __iomem *addr)
{
u32 w;
__asm__ __volatile__(
" ld%U1 %0, %1 \n"
: "=r" (w)
: "m" (*(volatile u32 __force *)addr)
: "memory");
return w;
}
#define __raw_writeb __raw_writeb
static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
{
__asm__ __volatile__(
" stb%U1 %0, %1 \n"
:
: "r" (b), "m" (*(volatile u8 __force *)addr)
: "memory");
}
#define __raw_writew __raw_writew
static inline void __raw_writew(u16 s, volatile void __iomem *addr)
{
__asm__ __volatile__(
" stw%U1 %0, %1 \n"
:
: "r" (s), "m" (*(volatile u16 __force *)addr)
: "memory");
}
#define __raw_writel __raw_writel
static inline void __raw_writel(u32 w, volatile void __iomem *addr)
{
__asm__ __volatile__(
" st%U1 %0, %1 \n"
:
: "r" (w), "m" (*(volatile u32 __force *)addr)
: "memory");
}
#include <asm-generic/io.h>
#endif /* _ASM_ARC_IO_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_IRQ_H
#define __ASM_ARC_IRQ_H
#define NR_IRQS 32
/* Platform Independent IRQs */
#define TIMER0_IRQ 3
#define TIMER1_IRQ 4
#include <asm-generic/irq.h>
extern void __init arc_init_IRQ(void);
extern int __init get_hw_config_num_irq(void);
void __cpuinit arc_local_timer_setup(unsigned int cpu);
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_IRQFLAGS_H
#define __ASM_ARC_IRQFLAGS_H
/* vineetg: March 2010 : local_irq_save( ) optimisation
* -Remove explicit mov of current status32 into reg, that is not needed
* -Use BIC insn instead of INVERTED + AND
* -Conditionally disable interrupts (if they are not enabled, don't disable)
*/
#ifdef __KERNEL__
#include <asm/arcregs.h>
#ifndef __ASSEMBLY__
/******************************************************************
* IRQ Control Macros
******************************************************************/
/*
* Save IRQ state and disable IRQs
*/
static inline long arch_local_irq_save(void)
{
unsigned long temp, flags;
__asm__ __volatile__(
" lr %1, [status32] \n"
" bic %0, %1, %2 \n"
" and.f 0, %1, %2 \n"
" flag.nz %0 \n"
: "=r"(temp), "=r"(flags)
: "n"((STATUS_E1_MASK | STATUS_E2_MASK))
: "cc");
return flags;
}
/*
* restore saved IRQ state
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(
" flag %0 \n"
:
: "r"(flags));
}
/*
* Unconditionally Enable IRQs
*/
extern void arch_local_irq_enable(void);
/*
* Unconditionally Disable IRQs
*/
static inline void arch_local_irq_disable(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
" and %0, %0, %1 \n"
" flag %0 \n"
: "=&r"(temp)
: "n"(~(STATUS_E1_MASK | STATUS_E2_MASK)));
}
/*
* save IRQ state
*/
static inline long arch_local_save_flags(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
: "=&r"(temp));
return temp;
}
/*
* Query IRQ state
*/
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & (STATUS_E1_MASK
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
| STATUS_E2_MASK
#endif
));
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
static inline void arch_mask_irq(unsigned int irq)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb &= ~(1 << irq);
write_aux_reg(AUX_IENABLE, ienb);
}
static inline void arch_unmask_irq(unsigned int irq)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb |= (1 << irq);
write_aux_reg(AUX_IENABLE, ienb);
}
#else
.macro IRQ_DISABLE scratch
lr \scratch, [status32]
bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
.endm
.macro IRQ_DISABLE_SAVE scratch, save
lr \scratch, [status32]
mov \save, \scratch /* Make a copy */
bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
.endm
.macro IRQ_ENABLE scratch
lr \scratch, [status32]
or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
.endm
#endif /* __ASSEMBLY__ */
#endif /* KERNEL */
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_KDEBUG_H
#define _ASM_ARC_KDEBUG_H
enum die_val {
DIE_UNUSED,
DIE_TRAP,
DIE_IERR,
DIE_OOPS
};
#endif

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/*
* kgdb support for ARC
*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ARC_KGDB_H__
#define __ARC_KGDB_H__
#ifdef CONFIG_KGDB
#include <asm/user.h>
/* to ensure compatibility with Linux 2.6.35, we don't implement the get/set
* register API yet */
#undef DBG_MAX_REG_NUM
#define GDB_MAX_REGS 39
#define BREAK_INSTR_SIZE 2
#define CACHE_FLUSH_IS_SAFE 1
#define NUMREGBYTES (GDB_MAX_REGS * 4)
#define BUFMAX 2048
static inline void arch_kgdb_breakpoint(void)
{
__asm__ __volatile__ ("trap_s 0x4\n");
}
extern void kgdb_trap(struct pt_regs *regs, int param);
enum arc700_linux_regnums {
_R0 = 0,
_R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
_R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
_R25, _R26,
_BTA = 27,
_LP_START = 28,
_LP_END = 29,
_LP_COUNT = 30,
_STATUS32 = 31,
_BLINK = 32,
_FP = 33,
__SP = 34,
_EFA = 35,
_RET = 36,
_ORIG_R8 = 37,
_STOP_PC = 38
};
#else
static inline void kgdb_trap(struct pt_regs *regs, int param)
{
}
#endif
#endif /* __ARC_KGDB_H__ */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ARC_KPROBES_H
#define _ARC_KPROBES_H
#ifdef CONFIG_KPROBES
typedef u16 kprobe_opcode_t;
#define UNIMP_S_INSTRUCTION 0x79e0
#define TRAP_S_2_INSTRUCTION 0x785e
#define MAX_INSN_SIZE 8
#define MAX_STACK_SIZE 64
struct arch_specific_insn {
int is_short;
kprobe_opcode_t *t1_addr, *t2_addr;
kprobe_opcode_t t1_opcode, t2_opcode;
};
#define flush_insn_slot(p) do { } while (0)
#define kretprobe_blacklist_size 0
struct kprobe;
void arch_remove_kprobe(struct kprobe *p);
int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
struct prev_kprobe {
struct kprobe *kp;
unsigned long status;
};
struct kprobe_ctlblk {
unsigned int kprobe_status;
struct pt_regs jprobe_saved_regs;
char jprobes_stack[MAX_STACK_SIZE];
struct prev_kprobe prev_kprobe;
};
int kprobe_fault_handler(struct pt_regs *regs, unsigned long cause);
void kretprobe_trampoline(void);
void trap_is_kprobe(unsigned long cause, unsigned long address,
struct pt_regs *regs);
#else
static void trap_is_kprobe(unsigned long cause, unsigned long address,
struct pt_regs *regs)
{
}
#endif
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_LINKAGE_H
#define __ASM_LINKAGE_H
#ifdef __ASSEMBLY__
/* Can't use the ENTRY macro in linux/linkage.h
* gas considers ';' as comment vs. newline
*/
.macro ARC_ENTRY name
.global \name
.align 4
\name:
.endm
.macro ARC_EXIT name
#define ASM_PREV_SYM_ADDR(name) .-##name
.size \ name, ASM_PREV_SYM_ADDR(\name)
.endm
/* annotation for data we want in DCCM - if enabled in .config */
.macro ARCFP_DATA nm
#ifdef CONFIG_ARC_HAS_DCCM
.section .data.arcfp
#else
.section .data
#endif
.global \nm
.endm
/* annotation for data we want in DCCM - if enabled in .config */
.macro ARCFP_CODE
#ifdef CONFIG_ARC_HAS_ICCM
.section .text.arcfp, "ax",@progbits
#else
.section .text, "ax",@progbits
#endif
.endm
#else /* !__ASSEMBLY__ */
#ifdef CONFIG_ARC_HAS_ICCM
#define __arcfp_code __attribute__((__section__(".text.arcfp")))
#else
#define __arcfp_code __attribute__((__section__(".text")))
#endif
#ifdef CONFIG_ARC_HAS_DCCM
#define __arcfp_data __attribute__((__section__(".data.arcfp")))
#else
#define __arcfp_data __attribute__((__section__(".data")))
#endif
#endif /* __ASSEMBLY__ */
#endif

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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* based on METAG mach/arch.h (which in turn was based on ARM)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_MACH_DESC_H_
#define _ASM_ARC_MACH_DESC_H_
/**
* struct machine_desc - Board specific callbacks, called from ARC common code
* Provided by each ARC board using MACHINE_START()/MACHINE_END(), so
* a multi-platform kernel builds with array of such descriptors.
* We extend the early DT scan to also match the DT's "compatible" string
* against the @dt_compat of all such descriptors, and one with highest
* "DT score" is selected as global @machine_desc.
*
* @name: Board/SoC name
* @dt_compat: Array of device tree 'compatible' strings
* (XXX: although only 1st entry is looked at)
* @init_early: Very early callback [called from setup_arch()]
* @init_irq: setup external IRQ controllers [called from init_IRQ()]
* @init_smp: for each CPU (e.g. setup IPI)
* [(M):init_IRQ(), (o):start_kernel_secondary()]
* @init_time: platform specific clocksource/clockevent registration
* [called from time_init()]
* @init_machine: arch initcall level callback (e.g. populate static
* platform devices or parse Devicetree)
* @init_late: Late initcall level callback
*
*/
struct machine_desc {
const char *name;
const char **dt_compat;
void (*init_early)(void);
void (*init_irq)(void);
#ifdef CONFIG_SMP
void (*init_smp)(unsigned int);
#endif
void (*init_time)(void);
void (*init_machine)(void);
void (*init_late)(void);
};
/*
* Current machine - only accessible during boot.
*/
extern struct machine_desc *machine_desc;
/*
* Machine type table - also only accessible during boot
*/
extern struct machine_desc __arch_info_begin[], __arch_info_end[];
#define for_each_machine_desc(p) \
for (p = __arch_info_begin; p < __arch_info_end; p++)
static inline struct machine_desc *default_machine_desc(void)
{
/* the default machine is the last one linked in */
if (__arch_info_end - 1 < __arch_info_begin)
return NULL;
return __arch_info_end - 1;
}
/*
* Set of macros to define architecture features.
* This is built into a table by the linker.
*/
#define MACHINE_START(_type, _name) \
static const struct machine_desc __mach_desc_##_type \
__used \
__attribute__((__section__(".arch.info.init"))) = { \
.name = _name,
#define MACHINE_END \
};
extern struct machine_desc *setup_machine_fdt(void *dt);
extern void __init copy_devtree(void);
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_MMU_H
#define _ASM_ARC_MMU_H
#ifndef __ASSEMBLY__
typedef struct {
unsigned long asid; /* Pvt Addr-Space ID for mm */
#ifdef CONFIG_ARC_TLB_DBG
struct task_struct *tsk;
#endif
} mm_context_t;
#endif
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: May 2011
* -Refactored get_new_mmu_context( ) to only handle live-mm.
* retiring-mm handled in other hooks
*
* Vineetg: March 25th, 2008: Bug #92690
* -Major rewrite of Core ASID allocation routine get_new_mmu_context
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef _ASM_ARC_MMU_CONTEXT_H
#define _ASM_ARC_MMU_CONTEXT_H
#include <asm/arcregs.h>
#include <asm/tlb.h>
#include <asm-generic/mm_hooks.h>
/* ARC700 ASID Management
*
* ARC MMU provides 8-bit ASID (0..255) to TAG TLB entries, allowing entries
* with same vaddr (different tasks) to co-exit. This provides for
* "Fast Context Switch" i.e. no TLB flush on ctxt-switch
*
* Linux assigns each task a unique ASID. A simple round-robin allocation
* of H/w ASID is done using software tracker @asid_cache.
* When it reaches max 255, the allocation cycle starts afresh by flushing
* the entire TLB and wrapping ASID back to zero.
*
* For book-keeping, Linux uses a couple of data-structures:
* -mm_struct has an @asid field to keep a note of task's ASID (needed at the
* time of say switch_mm( )
* -An array of mm structs @asid_mm_map[] for asid->mm the reverse mapping,
* given an ASID, finding the mm struct associated.
*
* The round-robin allocation algorithm allows for ASID stealing.
* If asid tracker is at "x-1", a new req will allocate "x", even if "x" was
* already assigned to another (switched-out) task. Obviously the prev owner
* is marked with an invalid ASID to make it request for a new ASID when it
* gets scheduled next time. However its TLB entries (with ASID "x") could
* exist, which must be cleared before the same ASID is used by the new owner.
* Flushing them would be plausible but costly solution. Instead we force a
* allocation policy quirk, which ensures that a stolen ASID won't have any
* TLB entries associates, alleviating the need to flush.
* The quirk essentially is not allowing ASID allocated in prev cycle
* to be used past a roll-over in the next cycle.
* When this happens (i.e. task ASID > asid tracker), task needs to refresh
* its ASID, aligning it to current value of tracker. If the task doesn't get
* scheduled past a roll-over, hence its ASID is not yet realigned with
* tracker, such ASID is anyways safely reusable because it is
* gauranteed that TLB entries with that ASID wont exist.
*/
#define FIRST_ASID 0
#define MAX_ASID 255 /* 8 bit PID field in PID Aux reg */
#define NO_ASID (MAX_ASID + 1) /* ASID Not alloc to mmu ctxt */
#define NUM_ASID ((MAX_ASID - FIRST_ASID) + 1)
/* ASID to mm struct mapping */
extern struct mm_struct *asid_mm_map[NUM_ASID + 1];
extern int asid_cache;
/*
* Assign a new ASID to task. If the task already has an ASID, it is
* relinquished.
*/
static inline void get_new_mmu_context(struct mm_struct *mm)
{
struct mm_struct *prev_owner;
unsigned long flags;
local_irq_save(flags);
/*
* Relinquish the currently owned ASID (if any).
* Doing unconditionally saves a cmp-n-branch; for already unused
* ASID slot, the value was/remains NULL
*/
asid_mm_map[mm->context.asid] = (struct mm_struct *)NULL;
/* move to new ASID */
if (++asid_cache > MAX_ASID) { /* ASID roll-over */
asid_cache = FIRST_ASID;
flush_tlb_all();
}
/*
* Is next ASID already owned by some-one else (we are stealing it).
* If so, let the orig owner be aware of this, so when it runs, it
* asks for a brand new ASID. This would only happen for a long-lived
* task with ASID from prev allocation cycle (before ASID roll-over).
*
* This might look wrong - if we are re-using some other task's ASID,
* won't we use it's stale TLB entries too. Actually switch_mm( ) takes
* care of such a case: it ensures that task with ASID from prev alloc
* cycle, when scheduled will refresh it's ASID: see switch_mm( ) below
* The stealing scenario described here will only happen if that task
* didn't get a chance to refresh it's ASID - implying stale entries
* won't exist.
*/
prev_owner = asid_mm_map[asid_cache];
if (prev_owner)
prev_owner->context.asid = NO_ASID;
/* Assign new ASID to tsk */
asid_mm_map[asid_cache] = mm;
mm->context.asid = asid_cache;
#ifdef CONFIG_ARC_TLB_DBG
pr_info("ARC_TLB_DBG: NewMM=0x%x OldMM=0x%x task_struct=0x%x Task: %s,"
" pid:%u, assigned asid:%lu\n",
(unsigned int)mm, (unsigned int)prev_owner,
(unsigned int)(mm->context.tsk), (mm->context.tsk)->comm,
(mm->context.tsk)->pid, mm->context.asid);
#endif
write_aux_reg(ARC_REG_PID, asid_cache | MMU_ENABLE);
local_irq_restore(flags);
}
/*
* Initialize the context related info for a new mm_struct
* instance.
*/
static inline int
init_new_context(struct task_struct *tsk, struct mm_struct *mm)
{
mm->context.asid = NO_ASID;
#ifdef CONFIG_ARC_TLB_DBG
mm->context.tsk = tsk;
#endif
return 0;
}
/* Prepare the MMU for task: setup PID reg with allocated ASID
If task doesn't have an ASID (never alloc or stolen, get a new ASID)
*/
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
#ifndef CONFIG_SMP
/* PGD cached in MMU reg to avoid 3 mem lookups: task->mm->pgd */
write_aux_reg(ARC_REG_SCRATCH_DATA0, next->pgd);
#endif
/*
* Get a new ASID if task doesn't have a valid one. Possible when
* -task never had an ASID (fresh after fork)
* -it's ASID was stolen - past an ASID roll-over.
* -There's a third obscure scenario (if this task is running for the
* first time afer an ASID rollover), where despite having a valid
* ASID, we force a get for new ASID - see comments at top.
*
* Both the non-alloc scenario and first-use-after-rollover can be
* detected using the single condition below: NO_ASID = 256
* while asid_cache is always a valid ASID value (0-255).
*/
if (next->context.asid > asid_cache) {
get_new_mmu_context(next);
} else {
/*
* XXX: This will never happen given the chks above
* BUG_ON(next->context.asid > MAX_ASID);
*/
write_aux_reg(ARC_REG_PID, next->context.asid | MMU_ENABLE);
}
}
static inline void destroy_context(struct mm_struct *mm)
{
unsigned long flags;
local_irq_save(flags);
asid_mm_map[mm->context.asid] = NULL;
mm->context.asid = NO_ASID;
local_irq_restore(flags);
}
/* it seemed that deactivate_mm( ) is a reasonable place to do book-keeping
* for retiring-mm. However destroy_context( ) still needs to do that because
* between mm_release( ) = >deactive_mm( ) and
* mmput => .. => __mmdrop( ) => destroy_context( )
* there is a good chance that task gets sched-out/in, making it's ASID valid
* again (this teased me for a whole day).
*/
#define deactivate_mm(tsk, mm) do { } while (0)
static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
{
#ifndef CONFIG_SMP
write_aux_reg(ARC_REG_SCRATCH_DATA0, next->pgd);
#endif
/* Unconditionally get a new ASID */
get_new_mmu_context(next);
}
#define enter_lazy_tlb(mm, tsk)
#endif /* __ASM_ARC_MMU_CONTEXT_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef _ASM_ARC_MODULE_H
#define _ASM_ARC_MODULE_H
#include <asm-generic/module.h>
#ifdef CONFIG_ARC_DW2_UNWIND
struct mod_arch_specific {
void *unw_info;
int unw_sec_idx;
};
#endif
#define MODULE_PROC_FAMILY "ARC700"
#define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY
#endif /* _ASM_ARC_MODULE_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* xchg() based mutex fast path maintains a state of 0 or 1, as opposed to
* atomic dec based which can "count" any number of lock contenders.
* This ideally needs to be fixed in core, but for now switching to dec ver.
*/
#if defined(CONFIG_SMP) && (CONFIG_NR_CPUS > 2)
#include <asm-generic/mutex-dec.h>
#else
#include <asm-generic/mutex-xchg.h>
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_PAGE_H
#define __ASM_ARC_PAGE_H
#include <uapi/asm/page.h>
#ifndef __ASSEMBLY__
#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
#define free_user_page(page, addr) free_page(addr)
/* TBD: for now don't worry about VIPT D$ aliasing */
#define clear_page(paddr) memset((paddr), 0, PAGE_SIZE)
#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
#define clear_user_page(addr, vaddr, pg) clear_page(addr)
#define copy_user_page(vto, vfrom, vaddr, pg) copy_page(vto, vfrom)
#undef STRICT_MM_TYPECHECKS
#ifdef STRICT_MM_TYPECHECKS
/*
* These are used to make use of C type-checking..
*/
typedef struct {
unsigned long pte;
} pte_t;
typedef struct {
unsigned long pgd;
} pgd_t;
typedef struct {
unsigned long pgprot;
} pgprot_t;
typedef unsigned long pgtable_t;
#define pte_val(x) ((x).pte)
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) })
#define __pgd(x) ((pgd_t) { (x) })
#define __pgprot(x) ((pgprot_t) { (x) })
#define pte_pgprot(x) __pgprot(pte_val(x))
#else /* !STRICT_MM_TYPECHECKS */
typedef unsigned long pte_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;
typedef unsigned long pgtable_t;
#define pte_val(x) (x)
#define pgd_val(x) (x)
#define pgprot_val(x) (x)
#define __pte(x) (x)
#define __pgprot(x) (x)
#define pte_pgprot(x) (x)
#endif
#define ARCH_PFN_OFFSET (CONFIG_LINUX_LINK_BASE >> PAGE_SHIFT)
#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
/*
* __pa, __va, virt_to_page (ALERT: deprecated, don't use them)
*
* These macros have historically been misnamed
* virt here means link-address/program-address as embedded in object code.
* So if kernel img is linked at 0x8000_0000 onwards, 0x8010_0000 will be
* 128th page, and virt_to_page( ) will return the struct page corresp to it.
* mem_map[ ] is an array of struct page for each page frame in the system
*
* Independent of where linux is linked at, link-addr = physical address
* So the old macro __pa = vaddr + PAGE_OFFSET - CONFIG_LINUX_LINK_BASE
* would have been wrong in case kernel is not at 0x8zs
*/
#define __pa(vaddr) ((unsigned long)vaddr)
#define __va(paddr) ((void *)((unsigned long)(paddr)))
#define virt_to_page(kaddr) \
(mem_map + ((__pa(kaddr) - CONFIG_LINUX_LINK_BASE) >> PAGE_SHIFT))
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
/* Default Permissions for page, used in mmap.c */
#ifdef CONFIG_ARC_STACK_NONEXEC
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE)
#else
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#endif
#define WANT_PAGE_VIRTUAL 1
#include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */
#include <asm-generic/getorder.h>
#endif /* !__ASSEMBLY__ */
#endif

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/*
* Copyright (C) 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef __ASM_PERF_EVENT_H
#define __ASM_PERF_EVENT_H
#endif /* __ASM_PERF_EVENT_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: June 2011
* -"/proc/meminfo | grep PageTables" kept on increasing
* Recently added pgtable dtor was not getting called.
*
* vineetg: May 2011
* -Variable pg-sz means that Page Tables could be variable sized themselves
* So calculate it based on addr traversal split [pgd-bits:pte-bits:xxx]
* -Page Table size capped to max 1 to save memory - hence verified.
* -Since these deal with constants, gcc compile-time optimizes them.
*
* vineetg: Nov 2010
* -Added pgtable ctor/dtor used for pgtable mem accounting
*
* vineetg: April 2010
* -Switched pgtable_t from being struct page * to unsigned long
* =Needed so that Page Table allocator (pte_alloc_one) is not forced to
* to deal with struct page. Thay way in future we can make it allocate
* multiple PG Tbls in one Page Frame
* =sweet side effect is avoiding calls to ugly page_address( ) from the
* pg-tlb allocator sub-sys (pte_alloc_one, ptr_free, pmd_populate
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef _ASM_ARC_PGALLOC_H
#define _ASM_ARC_PGALLOC_H
#include <linux/mm.h>
#include <linux/log2.h>
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
{
pmd_set(pmd, pte);
}
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t ptep)
{
pmd_set(pmd, (pte_t *) ptep);
}
static inline int __get_order_pgd(void)
{
return get_order(PTRS_PER_PGD * 4);
}
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
int num, num2;
pgd_t *ret = (pgd_t *) __get_free_pages(GFP_KERNEL, __get_order_pgd());
if (ret) {
num = USER_PTRS_PER_PGD + USER_KERNEL_GUTTER / PGDIR_SIZE;
memzero(ret, num * sizeof(pgd_t));
num2 = VMALLOC_SIZE / PGDIR_SIZE;
memcpy(ret + num, swapper_pg_dir + num, num2 * sizeof(pgd_t));
memzero(ret + num + num2,
(PTRS_PER_PGD - num - num2) * sizeof(pgd_t));
}
return ret;
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_pages((unsigned long)pgd, __get_order_pgd());
}
/*
* With software-only page-tables, addr-split for traversal is tweakable and
* that directly governs how big tables would be at each level.
* Further, the MMU page size is configurable.
* Thus we need to programatically assert the size constraint
* All of this is const math, allowing gcc to do constant folding/propagation.
*/
static inline int __get_order_pte(void)
{
return get_order(PTRS_PER_PTE * 4);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
pte_t *pte;
pte = (pte_t *) __get_free_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO,
__get_order_pte());
return pte;
}
static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
pgtable_t pte_pg;
pte_pg = __get_free_pages(GFP_KERNEL | __GFP_REPEAT, __get_order_pte());
if (pte_pg) {
memzero((void *)pte_pg, PTRS_PER_PTE * 4);
pgtable_page_ctor(virt_to_page(pte_pg));
}
return pte_pg;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_pages((unsigned long)pte, __get_order_pte()); /* takes phy addr */
}
static inline void pte_free(struct mm_struct *mm, pgtable_t ptep)
{
pgtable_page_dtor(virt_to_page(ptep));
free_pages(ptep, __get_order_pte());
}
#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)
#define check_pgt_cache() do { } while (0)
#define pmd_pgtable(pmd) pmd_page_vaddr(pmd)
#endif /* _ASM_ARC_PGALLOC_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: May 2011
* -Folded PAGE_PRESENT (used by VM) and PAGE_VALID (used by MMU) into 1.
* They are semantically the same although in different contexts
* VALID marks a TLB entry exists and it will only happen if PRESENT
* - Utilise some unused free bits to confine PTE flags to 12 bits
* This is a must for 4k pg-sz
*
* vineetg: Mar 2011 - changes to accomodate MMU TLB Page Descriptor mods
* -TLB Locking never really existed, except for initial specs
* -SILENT_xxx not needed for our port
* -Per my request, MMU V3 changes the layout of some of the bits
* to avoid a few shifts in TLB Miss handlers.
*
* vineetg: April 2010
* -PGD entry no longer contains any flags. If empty it is 0, otherwise has
* Pg-Tbl ptr. Thus pmd_present(), pmd_valid(), pmd_set( ) become simpler
*
* vineetg: April 2010
* -Switched form 8:11:13 split for page table lookup to 11:8:13
* -this speeds up page table allocation itself as we now have to memset 1K
* instead of 8k per page table.
* -TODO: Right now page table alloc is 8K and rest 7K is unused
* need to optimise it
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef _ASM_ARC_PGTABLE_H
#define _ASM_ARC_PGTABLE_H
#include <asm/page.h>
#include <asm/mmu.h>
#include <asm-generic/pgtable-nopmd.h>
/**************************************************************************
* Page Table Flags
*
* ARC700 MMU only deals with softare managed TLB entries.
* Page Tables are purely for Linux VM's consumption and the bits below are
* suited to that (uniqueness). Hence some are not implemented in the TLB and
* some have different value in TLB.
* e.g. MMU v2: K_READ bit is 8 and so is GLOBAL (possible becoz they live in
* seperate PD0 and PD1, which combined forms a translation entry)
* while for PTE perspective, they are 8 and 9 respectively
* with MMU v3: Most bits (except SHARED) represent the exact hardware pos
* (saves some bit shift ops in TLB Miss hdlrs)
*/
#if (CONFIG_ARC_MMU_VER <= 2)
#define _PAGE_ACCESSED (1<<1) /* Page is accessed (S) */
#define _PAGE_CACHEABLE (1<<2) /* Page is cached (H) */
#define _PAGE_EXECUTE (1<<3) /* Page has user execute perm (H) */
#define _PAGE_WRITE (1<<4) /* Page has user write perm (H) */
#define _PAGE_READ (1<<5) /* Page has user read perm (H) */
#define _PAGE_K_EXECUTE (1<<6) /* Page has kernel execute perm (H) */
#define _PAGE_K_WRITE (1<<7) /* Page has kernel write perm (H) */
#define _PAGE_K_READ (1<<8) /* Page has kernel perm (H) */
#define _PAGE_GLOBAL (1<<9) /* Page is global (H) */
#define _PAGE_MODIFIED (1<<10) /* Page modified (dirty) (S) */
#define _PAGE_FILE (1<<10) /* page cache/ swap (S) */
#define _PAGE_PRESENT (1<<11) /* TLB entry is valid (H) */
#else
/* PD1 */
#define _PAGE_CACHEABLE (1<<0) /* Page is cached (H) */
#define _PAGE_EXECUTE (1<<1) /* Page has user execute perm (H) */
#define _PAGE_WRITE (1<<2) /* Page has user write perm (H) */
#define _PAGE_READ (1<<3) /* Page has user read perm (H) */
#define _PAGE_K_EXECUTE (1<<4) /* Page has kernel execute perm (H) */
#define _PAGE_K_WRITE (1<<5) /* Page has kernel write perm (H) */
#define _PAGE_K_READ (1<<6) /* Page has kernel perm (H) */
#define _PAGE_ACCESSED (1<<7) /* Page is accessed (S) */
/* PD0 */
#define _PAGE_GLOBAL (1<<8) /* Page is global (H) */
#define _PAGE_PRESENT (1<<9) /* TLB entry is valid (H) */
#define _PAGE_SHARED_CODE (1<<10) /* Shared Code page with cmn vaddr
usable for shared TLB entries (H) */
#define _PAGE_MODIFIED (1<<11) /* Page modified (dirty) (S) */
#define _PAGE_FILE (1<<12) /* page cache/ swap (S) */
#define _PAGE_SHARED_CODE_H (1<<31) /* Hardware counterpart of above */
#endif
/* Kernel allowed all permissions for all pages */
#define _K_PAGE_PERMS (_PAGE_K_EXECUTE | _PAGE_K_WRITE | _PAGE_K_READ)
#ifdef CONFIG_ARC_CACHE_PAGES
#define _PAGE_DEF_CACHEABLE _PAGE_CACHEABLE
#else
#define _PAGE_DEF_CACHEABLE (0)
#endif
/* Helper for every "user" page
* -kernel can R/W/X
* -by default cached, unless config otherwise
* -present in memory
*/
#define ___DEF (_PAGE_PRESENT | _K_PAGE_PERMS | _PAGE_DEF_CACHEABLE)
/* Set of bits not changed in pte_modify */
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED)
/* More Abbrevaited helpers */
#define PAGE_U_NONE __pgprot(___DEF)
#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
#define PAGE_U_X_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE | \
_PAGE_EXECUTE)
#define PAGE_SHARED PAGE_U_W_R
/* While kernel runs out of unstrslated space, vmalloc/modules use a chunk of
* kernel vaddr space - visible in all addr spaces, but kernel mode only
* Thus Global, all-kernel-access, no-user-access, cached
*/
#define PAGE_KERNEL __pgprot(___DEF | _PAGE_GLOBAL)
/* ioremap */
#define PAGE_KERNEL_NO_CACHE __pgprot(_PAGE_PRESENT | _K_PAGE_PERMS | \
_PAGE_GLOBAL)
/**************************************************************************
* Mapping of vm_flags (Generic VM) to PTE flags (arch specific)
*
* Certain cases have 1:1 mapping
* e.g. __P101 means VM_READ, VM_EXEC and !VM_SHARED
* which directly corresponds to PAGE_U_X_R
*
* Other rules which cause the divergence from 1:1 mapping
*
* 1. Although ARC700 can do exclusive execute/write protection (meaning R
* can be tracked independet of X/W unlike some other CPUs), still to
* keep things consistent with other archs:
* -Write implies Read: W => R
* -Execute implies Read: X => R
*
* 2. Pvt Writable doesn't have Write Enabled initially: Pvt-W => !W
* This is to enable COW mechanism
*/
/* xwr */
#define __P000 PAGE_U_NONE
#define __P001 PAGE_U_R
#define __P010 PAGE_U_R /* Pvt-W => !W */
#define __P011 PAGE_U_R /* Pvt-W => !W */
#define __P100 PAGE_U_X_R /* X => R */
#define __P101 PAGE_U_X_R
#define __P110 PAGE_U_X_R /* Pvt-W => !W and X => R */
#define __P111 PAGE_U_X_R /* Pvt-W => !W */
#define __S000 PAGE_U_NONE
#define __S001 PAGE_U_R
#define __S010 PAGE_U_W_R /* W => R */
#define __S011 PAGE_U_W_R
#define __S100 PAGE_U_X_R /* X => R */
#define __S101 PAGE_U_X_R
#define __S110 PAGE_U_X_W_R /* X => R */
#define __S111 PAGE_U_X_W_R
/****************************************************************
* Page Table Lookup split
*
* We implement 2 tier paging and since this is all software, we are free
* to customize the span of a PGD / PTE entry to suit us
*
* 32 bit virtual address
* -------------------------------------------------------
* | BITS_FOR_PGD | BITS_FOR_PTE | BITS_IN_PAGE |
* -------------------------------------------------------
* | | |
* | | --> off in page frame
* | |
* | ---> index into Page Table
* |
* ----> index into Page Directory
*/
#define BITS_IN_PAGE PAGE_SHIFT
/* Optimal Sizing of Pg Tbl - based on MMU page size */
#if defined(CONFIG_ARC_PAGE_SIZE_8K)
#define BITS_FOR_PTE 8
#elif defined(CONFIG_ARC_PAGE_SIZE_16K)
#define BITS_FOR_PTE 8
#elif defined(CONFIG_ARC_PAGE_SIZE_4K)
#define BITS_FOR_PTE 9
#endif
#define BITS_FOR_PGD (32 - BITS_FOR_PTE - BITS_IN_PAGE)
#define PGDIR_SHIFT (BITS_FOR_PTE + BITS_IN_PAGE)
#define PGDIR_SIZE (1UL << PGDIR_SHIFT) /* vaddr span, not PDG sz */
#define PGDIR_MASK (~(PGDIR_SIZE-1))
#ifdef __ASSEMBLY__
#define PTRS_PER_PTE (1 << BITS_FOR_PTE)
#define PTRS_PER_PGD (1 << BITS_FOR_PGD)
#else
#define PTRS_PER_PTE (1UL << BITS_FOR_PTE)
#define PTRS_PER_PGD (1UL << BITS_FOR_PGD)
#endif
/*
* Number of entries a user land program use.
* TASK_SIZE is the maximum vaddr that can be used by a userland program.
*/
#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
/*
* No special requirements for lowest virtual address we permit any user space
* mapping to be mapped at.
*/
#define FIRST_USER_ADDRESS 0
/****************************************************************
* Bucket load of VM Helpers
*/
#ifndef __ASSEMBLY__
#define pte_ERROR(e) \
pr_crit("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
#define pgd_ERROR(e) \
pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
/* the zero page used for uninitialized and anonymous pages */
extern char empty_zero_page[PAGE_SIZE];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
#define pte_unmap(pte) do { } while (0)
#define pte_unmap_nested(pte) do { } while (0)
#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
/* find the page descriptor of the Page Tbl ref by PMD entry */
#define pmd_page(pmd) virt_to_page(pmd_val(pmd) & PAGE_MASK)
/* find the logical addr (phy for ARC) of the Page Tbl ref by PMD entry */
#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
/* In a 2 level sys, setup the PGD entry with PTE value */
static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
{
pmd_val(*pmdp) = (unsigned long)ptep;
}
#define pte_none(x) (!pte_val(x))
#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
#define pte_clear(mm, addr, ptep) set_pte_at(mm, addr, ptep, __pte(0))
#define pmd_none(x) (!pmd_val(x))
#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
#define pmd_present(x) (pmd_val(x))
#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
#define pte_page(x) (mem_map + \
(unsigned long)(((pte_val(x) - PAGE_OFFSET) >> PAGE_SHIFT)))
#define mk_pte(page, pgprot) \
({ \
pte_t pte; \
pte_val(pte) = __pa(page_address(page)) + pgprot_val(pgprot); \
pte; \
})
/* TBD: Non linear mapping stuff */
static inline int pte_file(pte_t pte)
{
return pte_val(pte) & _PAGE_FILE;
}
#define PTE_FILE_MAX_BITS 30
#define pgoff_to_pte(x) __pte(x)
#define pte_to_pgoff(x) (pte_val(x) >> 2)
#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
#define pfn_pte(pfn, prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
/*
* pte_offset gets a @ptr to PMD entry (PGD in our 2-tier paging system)
* and returns ptr to PTE entry corresponding to @addr
*/
#define pte_offset(dir, addr) ((pte_t *)(pmd_page_vaddr(*dir)) +\
__pte_index(addr))
/* No mapping of Page Tables in high mem etc, so following same as above */
#define pte_offset_kernel(dir, addr) pte_offset(dir, addr)
#define pte_offset_map(dir, addr) pte_offset(dir, addr)
/* Zoo of pte_xxx function */
#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
#define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED)
#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
#define pte_special(pte) (0)
#define PTE_BIT_FUNC(fn, op) \
static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
PTE_BIT_FUNC(mkclean, &= ~(_PAGE_MODIFIED));
PTE_BIT_FUNC(mkdirty, |= (_PAGE_MODIFIED));
PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
}
/* Macro to mark a page protection as uncacheable */
#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pteval)
{
set_pte(ptep, pteval);
}
/*
* All kernel related VM pages are in init's mm.
*/
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
#define pgd_offset(mm, addr) (((mm)->pgd)+pgd_index(addr))
/*
* Macro to quickly access the PGD entry, utlising the fact that some
* arch may cache the pointer to Page Directory of "current" task
* in a MMU register
*
* Thus task->mm->pgd (3 pointer dereferences, cache misses etc simply
* becomes read a register
*
* ********CAUTION*******:
* Kernel code might be dealing with some mm_struct of NON "current"
* Thus use this macro only when you are certain that "current" is current
* e.g. when dealing with signal frame setup code etc
*/
#ifndef CONFIG_SMP
#define pgd_offset_fast(mm, addr) \
({ \
pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0); \
pgd_base + pgd_index(addr); \
})
#else
#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
#endif
extern void paging_init(void);
extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
pte_t *ptep);
/* Encode swap {type,off} tuple into PTE
* We reserve 13 bits for 5-bit @type, keeping bits 12-5 zero, ensuring that
* both PAGE_FILE and PAGE_PRESENT are zero in a PTE holding swap "identifier"
*/
#define __swp_entry(type, off) ((swp_entry_t) { \
((type) & 0x1f) | ((off) << 13) })
/* Decode a PTE containing swap "identifier "into constituents */
#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
#define __swp_offset(pte_lookalike) ((pte_lookalike).val << 13)
/* NOPs, to keep generic kernel happy */
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#define kern_addr_valid(addr) (1)
/*
* remap a physical page `pfn' of size `size' with page protection `prot'
* into virtual address `from'
*/
#define io_remap_pfn_range(vma, from, pfn, size, prot) \
remap_pfn_range(vma, from, pfn, size, prot)
#include <asm-generic/pgtable.h>
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
#endif /* __ASSEMBLY__ */
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: March 2009
* -Implemented task_pt_regs( )
*
* Amit Bhor, Sameer Dhavale, Ashwin Chaugule: Codito Technologies 2004
*/
#ifndef __ASM_ARC_PROCESSOR_H
#define __ASM_ARC_PROCESSOR_H
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <asm/arcregs.h> /* for STATUS_E1_MASK et all */
/* Arch specific stuff which needs to be saved per task.
* However these items are not so important so as to earn a place in
* struct thread_info
*/
struct thread_struct {
unsigned long ksp; /* kernel mode stack pointer */
unsigned long callee_reg; /* pointer to callee regs */
unsigned long fault_address; /* dbls as brkpt holder as well */
unsigned long cause_code; /* Exception Cause Code (ECR) */
#ifdef CONFIG_ARC_CURR_IN_REG
unsigned long user_r25;
#endif
#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
struct arc_fpu fpu;
#endif
};
#define INIT_THREAD { \
.ksp = sizeof(init_stack) + (unsigned long) init_stack, \
}
/* Forward declaration, a strange C thing */
struct task_struct;
/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *t);
#define task_pt_regs(p) \
((struct pt_regs *)(THREAD_SIZE - 4 + (void *)task_stack_page(p)) - 1)
/* Free all resources held by a thread. */
#define release_thread(thread) do { } while (0)
/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk) do { } while (0)
/*
* A lot of busy-wait loops in SMP are based off of non-volatile data otherwise
* get optimised away by gcc
*/
#ifdef CONFIG_SMP
#define cpu_relax() __asm__ __volatile__ ("" : : : "memory")
#else
#define cpu_relax() do { } while (0)
#endif
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->ret)
/*
* Where abouts of Task's sp, fp, blink when it was last seen in kernel mode.
* These can't be derived from pt_regs as that would give correp user-mode val
*/
#define KSTK_ESP(tsk) (tsk->thread.ksp)
#define KSTK_BLINK(tsk) (*((unsigned int *)((KSTK_ESP(tsk)) + (13+1+1)*4)))
#define KSTK_FP(tsk) (*((unsigned int *)((KSTK_ESP(tsk)) + (13+1)*4)))
/*
* Do necessary setup to start up a newly executed thread.
*
* E1,E2 so that Interrupts are enabled in user mode
* L set, so Loop inhibited to begin with
* lp_start and lp_end seeded with bogus non-zero values so to easily catch
* the ARC700 sr to lp_start hardware bug
*/
#define start_thread(_regs, _pc, _usp) \
do { \
set_fs(USER_DS); /* reads from user space */ \
(_regs)->ret = (_pc); \
/* Interrupts enabled in User Mode */ \
(_regs)->status32 = STATUS_U_MASK | STATUS_L_MASK \
| STATUS_E1_MASK | STATUS_E2_MASK; \
(_regs)->sp = (_usp); \
/* bogus seed values for debugging */ \
(_regs)->lp_start = 0x10; \
(_regs)->lp_end = 0x80; \
} while (0)
extern unsigned int get_wchan(struct task_struct *p);
/*
* Default implementation of macro that returns current
* instruction pointer ("program counter").
* Should the PC register be read instead ? This macro does not seem to
* be used in many places so this wont be all that bad.
*/
#define current_text_addr() ({ __label__ _l; _l: &&_l; })
#endif /* !__ASSEMBLY__ */
/* Kernels Virtual memory area.
* Unlike other architectures(MIPS, sh, cris ) ARC 700 does not have a
* "kernel translated" region (like KSEG2 in MIPS). So we use a upper part
* of the translated bottom 2GB for kernel virtual memory and protect
* these pages from user accesses by disabling Ru, Eu and Wu.
*/
#define VMALLOC_SIZE (0x10000000) /* 256M */
#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)
#define VMALLOC_END (PAGE_OFFSET)
/* Most of the architectures seem to be keeping some kind of padding between
* userspace TASK_SIZE and PAGE_OFFSET. i.e TASK_SIZE != PAGE_OFFSET.
*/
#define USER_KERNEL_GUTTER 0x10000000
/* User address space:
* On ARC700, CPU allows the entire lower half of 32 bit address space to be
* translated. Thus potentially 2G (0:0x7FFF_FFFF) could be User vaddr space.
* However we steal 256M for kernel addr (0x7000_0000:0x7FFF_FFFF) and another
* 256M (0x6000_0000:0x6FFF_FFFF) is gutter between user/kernel spaces
* Thus total User vaddr space is (0:0x5FFF_FFFF)
*/
#define TASK_SIZE (PAGE_OFFSET - VMALLOC_SIZE - USER_KERNEL_GUTTER)
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's.
*/
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
#endif /* __KERNEL__ */
#endif /* __ASM_ARC_PROCESSOR_H */

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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_PROM_H_
#define _ASM_ARC_PROM_H_
#define HAVE_ARCH_DEVTREE_FIXUPS
#endif

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef __ASM_ARC_PTRACE_H
#define __ASM_ARC_PTRACE_H
#include <uapi/asm/ptrace.h>
#ifndef __ASSEMBLY__
/* THE pt_regs: Defines how regs are saved during entry into kernel */
struct pt_regs {
/*
* 1 word gutter after reg-file has been saved
* Technically not needed, Since SP always points to a "full" location
* (vs. "empty"). But pt_regs is shared with tools....
*/
long res;
/* Real registers */
long bta; /* bta_l1, bta_l2, erbta */
long lp_start;
long lp_end;
long lp_count;
long status32; /* status32_l1, status32_l2, erstatus */
long ret; /* ilink1, ilink2 or eret */
long blink;
long fp;
long r26; /* gp */
long r12;
long r11;
long r10;
long r9;
long r8;
long r7;
long r6;
long r5;
long r4;
long r3;
long r2;
long r1;
long r0;
long sp; /* user/kernel sp depending on where we came from */
long orig_r0;
/*to distinguish bet excp, syscall, irq */
union {
#ifdef CONFIG_CPU_BIG_ENDIAN
/* so that assembly code is same for LE/BE */
unsigned long orig_r8:16, event:16;
#else
unsigned long event:16, orig_r8:16;
#endif
long orig_r8_word;
};
};
/* Callee saved registers - need to be saved only when you are scheduled out */
struct callee_regs {
long res; /* Again this is not needed */
long r25;
long r24;
long r23;
long r22;
long r21;
long r20;
long r19;
long r18;
long r17;
long r16;
long r15;
long r14;
long r13;
};
#define instruction_pointer(regs) ((regs)->ret)
#define profile_pc(regs) instruction_pointer(regs)
/* return 1 if user mode or 0 if kernel mode */
#define user_mode(regs) (regs->status32 & STATUS_U_MASK)
#define user_stack_pointer(regs)\
({ unsigned int sp; \
if (user_mode(regs)) \
sp = (regs)->sp;\
else \
sp = -1; \
sp; \
})
/* return 1 if PC in delay slot */
#define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK)
#define in_syscall(regs) (regs->event & orig_r8_IS_SCALL)
#define in_brkpt_trap(regs) (regs->event & orig_r8_IS_BRKPT)
#define syscall_wont_restart(regs) (regs->event |= orig_r8_IS_SCALL_RESTARTED)
#define syscall_restartable(regs) !(regs->event & orig_r8_IS_SCALL_RESTARTED)
#define current_pt_regs() \
({ \
/* open-coded current_thread_info() */ \
register unsigned long sp asm ("sp"); \
unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \
(struct pt_regs *)(pg_start + THREAD_SIZE - 4) - 1; \
})
static inline long regs_return_value(struct pt_regs *regs)
{
return regs->r0;
}
#endif /* !__ASSEMBLY__ */
#define orig_r8_IS_SCALL 0x0001
#define orig_r8_IS_SCALL_RESTARTED 0x0002
#define orig_r8_IS_BRKPT 0x0004
#define orig_r8_IS_EXCPN 0x0004
#define orig_r8_IS_IRQ1 0x0010
#define orig_r8_IS_IRQ2 0x0020
#endif /* __ASM_PTRACE_H */

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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_SECTIONS_H
#define _ASM_ARC_SECTIONS_H
#include <asm-generic/sections.h>
extern char _int_vec_base_lds[];
extern char __arc_dccm_base[];
extern char __dtb_start[];
#endif

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