Commit Graph

1194 Commits

Author SHA1 Message Date
Jon Loeliger
5dc599c206 [POWERPC] Allow MPC8641 HPCN to build with CONFIG_PCI disabled too.
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-25 14:32:13 +10:00
Matt Porter
054389f114 [POWERPC] Fix powerpc 44x_mmu build
The PIN_SIZE definition name changed, update 44x_mmu.c accordingly.

Signed-off-by: Matt Porter <mporter@embeddedalley.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-25 13:41:41 +10:00
Matt Porter
af07ac276a [POWERPC] Remove flush_dcache_all export
Removes the flush_dcache_all export for non coherent platforms.
We removed the last in-kernel user of this years ago in arch/ppc
so it no longer serves a purpose. Plus, it breaks the build
at the moment.

Signed-off-by: Matt Porter <mporter@embeddedalley.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-25 13:32:35 +10:00
Adam Litke
c9169f8747 [POWERPC] hugepage BUG fix
On Tue, 2006-08-15 at 08:22 -0700, Dave Hansen wrote:
> kernel BUG in cache_free_debugcheck at mm/slab.c:2748!

Alright, this one is only triggered when slab debugging is enabled.  The
slabs are assumed to be aligned on a HUGEPTE_TABLE_SIZE boundary.  The free
path makes use of this assumption and uses the lowest nibble to pass around
an index into an array of kmem_cache pointers.  With slab debugging turned
on, the slab is still aligned, but the "working" object pointer is not.
This would break the assumption above that a full nibble is available for
the PGF_CACHENUM_MASK.

The following patch reduces PGF_CACHENUM_MASK to cover only the two least
significant bits, which is enough to cover the current number of 4 pgtable
cache types.  Then use this constant to mask out the appropriate part of
the huge pte pointer.

Signed-off-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-24 10:07:23 +10:00
Li Yang
d55c4a76f2 [POWERPC] Fix compile problem without CONFIG_PCI
Compile fails without defining CONFIG_PCI.
The patch fix this.

[paulus@samba.org: Moved of_irq_pci_swizzle so we only need one #ifdef]

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 17:12:33 +10:00
Paul Mackerras
87589f08be [POWERPC] Correct masks used in emulating some instructions
When we get an illegal instruction exception, we check to see whether
the instruction is one that we emulate for the user program.  Some of
the masks we use in checking whether the offending instruction is one
we care about didn't have the top bit set, which is the MSB of the
major opcode.  Thus some undefined opcodes could get emulated as other
(defined but unimplemented) instructions.  This corrects the masks.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 16:58:39 +10:00
Zang Roy-r61911
be9633e96a [POWERPC] Pass UPIO_TSI flag to 8259 serial driver
The patch passes the UPIO_TSI flag to general 8259 serial driver

Signed-off-by: Roy Zang	<tie-fei.zang@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:19 +10:00
Zang Roy-r61911
c4342ff92b [POWERPC] Update mpc7448hpc2 board irq support using device tree
The patch rewrites mpc7448hpc2 board irq support according to the new
mpic device tree interface.

Signed-off-by: Roy Zang	<tie-fei.zang@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
Benjamin Herrenschmidt
6cdd2bdfb9 [POWERPC] Fix BootX booting with an initrd
The bootx_init.c trampoline didn't properly add the ramdisk to the
"reserve map" (list of reserved areas of memory), thus causing all sorts
of failures when using BootX with an initrd. Also fixes a possible
problem if the ramdisk is located before the device-tree passed by
BootX.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
Nathan Lynch
5db9fa9593 [POWERPC] Fix gettimeofday inaccuracies
There are two problems in the powerpc gettimeofday code which can
cause incorrect results to be returned.

The first is that there is a race between do_gettimeofday and the
timer interrupt:

1. do_gettimeofday does get_tb()

2. decrementer exception on boot cpu which runs timer_recalc_offset,
   which also samples the timebase and updates the do_gtod structure
   with a greater timebase value.

3. do_gettimeofday calls __do_gettimeofday, which leads to the
   negative result from tb_val - temp_varp->tb_orig_stamp.

The second is caused by taking the boot cpu offline, which can cause
the value of tb_last_jiffy to be increased past the currently
available timebase, causing the same underflow as above.

[paulus@samba.org - define and use data_barrier() instead of mb().]

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
Andy Fleming
aa74a30be9 [POWERPC] Fix FEC node in 8540 ADS dts
* Fixed the FEC node, and its accompanying PHY
* Fixed a spacing issue in the PIC node

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
Jon Loeliger
343832734f [POWERPC] Rewrite the PPC 86xx IRQ handling to use Flat Device Tree
IRQ setup now comes from the Flat Device Tree and use the new generic
IRQ code.  Fixed the fsl_soc.c IRQ OF interrupt node parsing.
Removed some unused MPC86xx macro definition.

Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
(cherry picked from 919fede6ed commit)
2006-08-23 15:51:18 +10:00
Andy Fleming
2654d6385f [POWERPC] Add 85xx DTS files to powerpc
Added the mpc85xx family of dts files to the powerpc tree

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
Andy Fleming
ddd64159eb [POWERPC] Fix CDS IRQ handling and PCI code
* Fix IRQ support in the 85xx CDS boards so it uses the new
  generic stuff
* Fix PCI IRQ mapping to use the device tree
* Disabled i8259 support to allow the CDS to boot.  This will be
  fixed soon, but the current code doesn't even compile, so this
  is a vast improvement

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
Andy Fleming
4c86cd9c59 [POWERPC] Fix interrupts on 8540 ADS board
* Fixed 8540 ADS support for the new irq layer
* Fixed 8540 ADS support for mapping PCI interrupts
* Updated 8540 ADS to use device tree for interrupt assignment
  and sense values

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-23 15:51:18 +10:00
Jon Loeliger
9e8a9bc2d2 [POWERPC] Fix the mpc8641_hpcn.dts file.
Add 'linux,phandle' entry to i8259@4d0 node.

Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-18 10:08:37 +10:00
Jon Loeliger
5315862045 [POWERPC] Offer PCI as a CONFIG choice for PPC_86xx.
Also fix 80-column run-over.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-18 10:08:36 +10:00
Jon Loeliger
707ba16f0f [POWERPC] Add MPC8641 HPCN Device Tree Source file.
As per list discussion, let's add device tree source files
under powerpc/boot/dts.  If nothing else, it is a starting point.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-18 10:02:45 +10:00
Jon Loeliger
f583165f6a [POWERPC] Convert to mac-address for ethernet MAC address data.
Also accept "local-mac-address".  However the old "address"
is now obsolete, but accepted for backwards compatibility.
It should be removed after all device trees have been
converted to use "mac-address".

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-18 09:50:16 +10:00
Olof Johansson
9a936a2e05 [POWERPC] powerpc: Clear HID0 attention enable on PPC970 at boot time
Clear HID0[en_attn] at CPU init time on PPC970.  Closes CVE-2006-4093.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-18 07:23:29 +10:00
Benjamin Herrenschmidt
e5c14ce118 [POWERPC] Fix irq radix tree remapping typo
The code for using the radix tree for reverse mapping of interrupts has
a typo that causes it to create incorrect mappings if the software and
hardware numbers happen to be different. This would, among others, cause
the IDE interrupt to fail on js20's. This fixes it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-17 16:41:11 +10:00
Ananth N Mavinakayanahalli
83db3dde26 [POWERPC] kprobes: Fix possible system crash during out-of-line single-stepping
- On archs that have no-exec support, we vmalloc() a executable scratch
area of PAGE_SIZE and divide it up into an array of slots of maximum
instruction size for that arch
- On a kprobe registration, the original instruction is copied to the
first available free slot, so if multiple kprobes are registered, chances
are, they get contiguous slots
- On POWER4, due to not having coherent icaches, we could hit a situation
where a probe that is registered on one processor, is hit immediately on
another. This second processor could have fetched the stream of text from
the out-of-line single-stepping area *before* the probe registration
completed, possibly due to an earlier (and a different) kprobe hit and
hence would see stale data at the slot.

Executing such an arbitrary instruction lead to a problem as reported
in LTC bugzilla 23555.

The correct solution is to call flush_icache_range() as soon as the
instruction is copied for out-of-line single-stepping, so the correct
instruction is seen on all processors.

Thanks to Will Schmidt who tracked this down.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-17 16:41:10 +10:00
Michael Ellerman
b6f35b4966 [POWERPC] Make crash.c work on 32-bit and 64-bit
To compile kexec on 32-bit we need a few more bits and pieces. Rather
than add empty definitions, we can make crash.c work on 32-bit, with
only a couple of kludges.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-17 16:41:10 +10:00
Michael Ellerman
47585d8f5d [POWERPC] Move some kexec logic into machine_kexec.c
We're missing a few functions for kexec to compile on 32-bit. There's
nothing really 64-bit specific about the 64-bit versions, so make them
generic rather than adding empty definitions for 32-bit.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-17 16:41:10 +10:00
Will Schmidt
90bdde362c [POWERPC] update {g5,iseries,pseries}_defconfigs
Updating the defconfigs for iseries, pseries, and G5.   Sticking with
the defaults, with the following exceptions:  I've turned off HW_RANDOM
for all three configs.   For G5, I've enabled SND_AOA and friends as
modules; this includes the FABRIC_LAYOUT, ONYX, TAS, TOONIE and
SOUNDBUS* config options.

Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-17 16:41:10 +10:00
David Wilder
eac8392f95 [POWERPC] Make secondary CPUs call into kdump on reset exception
In the case of a system hang, the user will invoke soft-reset to
initiate the kdump boot.  If xmon is enabled, the CPU(s) enter into the
xmon debugger.   Unfortunately, the secondary CPU(s) will return to the
hung state when they exit from the debugger (returned from die() ->
system_reset_exception()).  This causes a problem in kdump since the
hung CPU(s) will not respond to the IPI sent from kdump.  This patch
fixes the issue by calling crash_kexec_secondary() directly from
system_reset_exception() without returning to the previous state.  These
secondary CPUs wait 5ms until the kdump boot is started by the primary
CPU.   In the case we exited from the debugger to "recover" (command 'x'
in xmon) the primary and the secondary CPUs will all return from die()
-> system_reset_exception() ->crash_kexec_secondary() wait 5ms, then
return to the previous state.  A kdump boot is not started in this case.

Signed-off-by: Haren Myneni <haren@us.ibm.com>
Signed-off-by: David Wilder <dwilder@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-17 16:41:10 +10:00
Haren Myneni
81b73dd92b [POWERPC] Fix might-sleep warning on removing cpus
Noticing the following might_sleep warning (dump_stack()) during kdump
testing when CONFIG_DEBUG_SPINLOCK_SLEEP is enabled. All secondary CPUs
will be calling rtas_set_indicator with interrupts disabled to remove
them from global interrupt queue.

BUG: sleeping function called from invalid context at
arch/powerpc/kernel/rtas.c:463
in_atomic():1, irqs_disabled():1
Call Trace:
[C00000000FFFB970] [C000000000010234] .show_stack+0x68/0x1b0 (unreliable)
[C00000000FFFBA10] [C000000000059354] .__might_sleep+0xd8/0xf4
[C00000000FFFBA90] [C00000000001D1BC] .rtas_busy_delay+0x20/0x5c
[C00000000FFFBB20] [C00000000001D8A8] .rtas_set_indicator+0x6c/0xcc
[C00000000FFFBBC0] [C000000000048BF4] .xics_teardown_cpu+0x118/0x134
[C00000000FFFBC40] [C00000000004539C]
.pseries_kexec_cpu_down_xics+0x74/0x8c
[C00000000FFFBCC0] [C00000000002DF08] .crash_ipi_callback+0x15c/0x188
[C00000000FFFBD50] [C0000000000296EC] .smp_message_recv+0x84/0xdc
[C00000000FFFBDC0] [C000000000048E08] .xics_ipi_dispatch+0xf0/0x130
[C00000000FFFBE50] [C00000000009EF10] .handle_IRQ_event+0x7c/0xf8
[C00000000FFFBF00] [C0000000000A0A14] .handle_percpu_irq+0x90/0x10c
[C00000000FFFBF90] [C00000000002659C] .call_handle_irq+0x1c/0x2c
[C00000000058B9C0] [C00000000000CA10] .do_IRQ+0xf4/0x1a4
[C00000000058BA50] [C0000000000044EC] hardware_interrupt_entry+0xc/0x10
 --- Exception: 501 at .plpar_hcall_norets+0x14/0x1c
   LR = .pseries_dedicated_idle_sleep+0x190/0x1d4
[C00000000058BD40] [C00000000058BDE0] 0xc00000000058bde0 (unreliable)
[C00000000058BDF0] [C00000000001270C] .cpu_idle+0x10c/0x1e0
[C00000000058BE70] [C000000000009274] .rest_init+0x44/0x5c

To fix this issue, rtas_set_indicator_fast() is added so that will not
wait for RTAS 'busy' delay and this new function is used for kdump (in
xics_teardown_cpu()) and for CPU hotplug ( xics_migrate_irqs_away() and
xics_setup_cpu()).

Note that the platform architecture spec says that set-indicator
on the indicator we're using here is not permitted to return the
busy or extended busy status codes.

Signed-off-by: Haren Myneni <haren@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-08 16:00:11 +10:00
Sonny Rao
dcc42f483d [POWERPC] fix PMU initialization on pseries lpar
We should not be calling power4_enable_pmcs() in
pseries_lpar_enable_pmcs(); just doing the hypercall is sufficient.
Prior to 2.6.15 we did not call power4_enable_pmcs() for an lpar.

power4_enable_pmcs() tries to read the hid0 register which is no
longer legal for an lpar in newer Power processors.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-08-08 15:55:12 +10:00
Linus Torvalds
49b1e3ea19 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Minor comment fix for misc_64.S
  [POWERPC] Use H_CEDE on non-SMT
  [POWERPC] force 64bit mode in fwnmi handlers to workaround firmware bugs
  [POWERPC] PMAC_APM_EMU should depend on ADB_PMU
  [POWERPC] Fix new interrupt code (MPIC detection)
  [POWERPC] Fix new interrupt code (MPIC endianness)
  [POWERPC] Add cpufreq support for Xserve G5
  [POWERPC] Xserve G5 thermal control fixes
  [POWERPC] Fix mem= handling when the memory limit is > RMO size
  [POWERPC] More offb/bootx fixes
  [POWERPC] Fix legacy_serial.c error handling on 32 bits
  [POWERPC] Fix default clock for udbg_16550
  [POWERPC] Fix non-MPIC CHRPs with CONFIG_SMP set
  [POWERPC] Fix 32 bits warning in prom_init.c
  [POWERPC] Workaround Pegasos incorrect ISA "ranges"
  [POWERPC] fix up front-LED Kconfig
2006-07-31 13:39:52 -07:00
Michael Hanselmann
4b755999d6 [PATCH] powermac: More powermac backlight fixes
This patch fixes several problems:
- The legacy backlight value might be set at interrupt time. Introduced
  a worker to prevent it from directly calling the backlight code.
- via-pmu allows the backlight to be grabbed, in which case we need to
  prevent other kernel code from changing the brightness.
- Don't send PMU requests in via-pmu-backlight when the machine is about
  to sleep or waking up.
- More Kconfig fixes.

Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-31 13:28:45 -07:00
Roland McGrath
0b0bf7a3cc [PATCH] vDSO hash-style fix
The latest toolchains can produce a new ELF section in DSOs and
dynamically-linked executables.  The new section ".gnu.hash" replaces
".hash", and allows for more efficient runtime symbol lookups by the
dynamic linker.  The new ld option --hash-style={sysv|gnu|both} controls
whether to produce the old ".hash", the new ".gnu.hash", or both.  In some
new systems such as Fedora Core 6, gcc by default passes --hash-style=gnu
to the linker, so that a standard invocation of "gcc -shared" results in
producing a DSO with only ".gnu.hash".  The new ".gnu.hash" sections need
to be dealt with the same way as ".hash" sections in all respects; only the
dynamic linker cares about their contents.  To work with older dynamic
linkers (i.e.  preexisting releases of glibc), a binary must have the old
".hash" section.  The --hash-style=both option produces binaries that a new
dynamic linker can use more efficiently, but an old dynamic linker can
still handle.

The new section runs afoul of the custom linker scripts used to build vDSO
images for the kernel.  On ia64, the failure mode for this is a boot-time
panic because the vDSO's PT_IA_64_UNWIND segment winds up ill-formed.

This patch addresses the problem in two ways.

First, it mentions ".gnu.hash" in all the linker scripts alongside ".hash".
 This produces correct vDSO images with --hash-style=sysv (or old tools),
with --hash-style=gnu, or with --hash-style=both.

Second, it passes the --hash-style=sysv option when building the vDSO
images, so that ".gnu.hash" is not actually produced.  This is the most
conservative choice for compatibility with any old userland.  There is some
concern that some ancient glibc builds (though not any known old production
system) might choke on --hash-style=both binaries.  The optimizations
provided by the new style of hash section do not really matter for a DSO
with a tiny number of symbols, as the vDSO has.  If someone wants to use
=gnu or =both for their vDSO builds and worry less about that
compatibility, just change the option and the linker script changes will
make any choice work fine.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-31 13:28:43 -07:00
Chandra Seetharaman
8c78f3075d [PATCH] cpu hotplug: replace __devinit* with __cpuinit* for cpu notifications
Few of the callback functions and notifier blocks that are associated with cpu
notifications incorrectly have __devinit and __devinitdata.  They should be
__cpuinit and __cpuinitdata instead.

It makes no functional difference but wastes text area when CONFIG_HOTPLUG is
enabled and CONFIG_HOTPLUG_CPU is not.

This patch fixes all those instances.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-31 13:28:39 -07:00
Horms
cea6a4ba8a [PATCH] panic_on_oops: remove ssleep()
This patch is part of an effort to unify the panic_on_oops behaviour across
all architectures that implement it.

It was pointed out to me by Andi Kleen that if an oops has occured in
interrupt context, then calling sleep() in the oops path will only cause a
panic, and that it would be really better for it not to be in the path at
all.

This patch removes the ssleep() call and reworks the console message
accordinly.  I have a slght concern that the resulting console message is
too long, feedback welcome.

For powerpc it also unifies the 32bit and 64bit behaviour.

Fror x86_64, this patch only updates the console message, as ssleep() is
already not present.

Signed-off-by: Horms <horms@verge.net.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-31 13:28:39 -07:00
Geoff Levand
8d950cb889 [POWERPC] Minor comment fix for misc_64.S
A minor comment fix for misc_64.S from Takao Shinohara.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-31 14:37:46 +10:00
Jake Moilanen
9b9b72fe70 [POWERPC] Use H_CEDE on non-SMT
On the JS21 systems, they have the SPLPAR hypertas set, but are not SMT
capable.  So, they are not making the H_CEDE call.  This is causing the
hypervisor to have to queue up work for the hdecr, taking an excessive
amount of time in maintenance code, and causing jitter on the box.

Making the H_CEDE call helps alleviate that problem.

Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-31 14:35:21 +10:00
Olaf Hering
9fc0a92c7e [POWERPC] force 64bit mode in fwnmi handlers to workaround firmware bugs
The firmware of POWER4 and JS20 systems does not switch the cpu to 64bit
mode when the registered system_reset and machine_check handlers get called.
If a 32bit process runs on that cpu at the time of the event, the cpu
remains in 32bit mode. xmon and kdump can not deal with it, the result is
an error like 'Bad kernel stack pointer fff2aad0 at 3200'.
xmon just loses some register info, but booting the kdump kernel usually fails.

Both handlers are not hot paths.  Duplicate the EXCEPTION_PROLOG_PSERIES macro
and add two instructions to switch to 64bit:

 li     r11,5;
 rldimi r10,r11,61,0;

Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-29 04:07:08 +10:00
Segher Boessenkool
96278d2100 [POWERPC] Fix new interrupt code (MPIC detection)
As the code comment already says, the Maple device-tree is incorrect here;
make the Linux code detect the correct thing, too.

Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-28 10:53:16 +10:00
Segher Boessenkool
d319a03bf8 [POWERPC] Fix new interrupt code (MPIC endianness)
All U3/U4 based systems are big-endian, not all express it in their
device trees.

Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-28 10:53:14 +10:00
Benjamin Herrenschmidt
e272a28534 [POWERPC] Add cpufreq support for Xserve G5
The Xserve G5 are capable of frequency switching like other desktop G5s.
This enables it. It also fix a Kconfig issue which prevented from
building the G5 cpufreq support if CONFIG_PMAC_SMU was not set (the
first version of that driver only worked with SMU based macs, but this
isn't the case anymore).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-28 10:51:43 +10:00
Michael Ellerman
30f30e1305 [POWERPC] Fix mem= handling when the memory limit is > RMO size
There's a bug in my cleaned up mem= handling, if the memory limit is
larger than the RMO size we'll erroneously enlarge the RMO size.

Fix is to only change the RMO size if the memory limit is less than
the current RMO value.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:28:24 +10:00
Benjamin Herrenschmidt
98c82472e9 [POWERPC] More offb/bootx fixes
There were still some issues with offb when BootX doesn't provide a
proper display node, this fixes them.  This also re-instates the
palette hacks that were disabled a couple of kernel versions ago when
I converted to the new OF parsing, and shuffles some functions around
to avoid prototypes.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:28:04 +10:00
Benjamin Herrenschmidt
45507ff3a2 [POWERPC] Fix legacy_serial.c error handling on 32 bits
The code in legacy_serial.c wouldn't properly compare OF translation
results against OF_BAD_ADDR as it's using a phys_addr_t which is 32
bits on some 32-bit powerpc platforms. This fixes it by always using
a u64 which is what is returned by the OF parsing routines. It also
makes translation failure harmless for ISA serial ports.  If they
can't translate, we can't use the UART early, but we can still let the
8250 driver use it later on by using IO port accessors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:27:27 +10:00
Benjamin Herrenschmidt
171505dafe [POWERPC] Fix default clock for udbg_16550
This patch makes it possible to provide 0 as the clock value for
udbg_16550, making it default to the standard 1.8432Mhz clock

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:27:13 +10:00
Benjamin Herrenschmidt
8cffc6ac66 [POWERPC] Fix non-MPIC CHRPs with CONFIG_SMP set
Pseudo-CHRP machines like Pegasos without an MPIC would crash at boot if
CONFIG_SMP was set because the "smp_ops" pointer was set to MPIC related
ops unconditionally. This patch makes it NULL on machines that don't
support SMP and provides proper default behaviour in the callers when
smp_ops is NULL.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:27:04 +10:00
Benjamin Herrenschmidt
21bd2e6696 [POWERPC] Fix 32 bits warning in prom_init.c
A warning is hurting my eyes when building 32 bits kernels

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:26:43 +10:00
Benjamin Herrenschmidt
f0ca330bc4 [POWERPC] Workaround Pegasos incorrect ISA "ranges"
The Pegasos firmware doesn't create a valid "ranges" property for the
ISA bridge, thus causing translation of ISA addresses and IO ports to
fail. This fixes it, thus re-enabling proper early serial console to
work on Pegasos.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:26:24 +10:00
Johannes Berg
d1a8df9136 [POWERPC] fix up front-LED Kconfig
This patch fixes the front-LED Kconfig issues I introduced while
creating it. Apparently having a dependency isn't enough to have the
select not evaluated or something like that.

The patch also changes the default configuration for pmac32 select the
default for the LED to be the IDE trigger. While I was at it, I
completely updated the defconfig and also added snd-aoa to it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-07-26 01:26:08 +10:00
Michael Hanselmann
e01af0384f [PATCH] powermac: Combined fixes for backlight code
This patch fixes several problems:
- pmac_backlight_key() is called under interrupt context, and therefore
  can't use mutexes or semaphores, so defer the backlight level for
  later, as it's not critical (original code by Aristeu S. Rozanski F.
  <aris@valeta.org>).
- Add exports for functions that might be called from modules
- Fix Kconfig depdencies on PMAC_BACKLIGHT.
- Fix locking issues on calls from inside the driver (reported by
  Aristeu S. Rozanski F., too)
- Fix wrong calculation of backlight values in some of the drivers
- Replace pmac_backlight_key_up/down by inline functions

[akpm@osdl.org: fix function prototypes]
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Aristeu S. Rozanski F. <aris@valeta.org>
Acked-by: Rene Nussbaumer <linux-kernel@killerfox.forkbomb.ch>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10 13:24:20 -07:00
Segher Boessenkool
58d383a622 [PATCH] powerpc: make OF interrupt tree parsing more strict
This patch fixes a bit of boundchecking in the new Open Firmware interrupt
tree parsing code.  It's important that it fails when things aren't correct in
order to trigger fallback mecanisms that are necessary to make some machines
work properly.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10 13:24:20 -07:00
Benjamin Herrenschmidt
06fe98e636 [PATCH] powerpc: fix MPIC OF tree parsing on Apple quad g5
The quad g5 currently doesn't boot due to two problems.  This patch fixes the
first one: Apple new way of doing interrupt specifiers in OF for devices using
the HT APIC isn't properly parsed by the new MPIC driver code.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10 13:24:20 -07:00