Commit Graph

3235 Commits

Author SHA1 Message Date
Komal Shah
344b215b0d [ARM] 3437/1: Kill duplicate exports of string library functions
Patch from Komal Shah

This patch fixes the duplicate exports of string library functions.

Signed-off-by: Komal Shah <komal_shah802003@yahoo.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-04-01 12:13:30 +01:00
Linus Torvalds
5b67e8dd5a Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] 3424/2: ixp23xx: fix uncompress.h for recent CRLF decompressor change
  [ARM] 3434/1: pxa i2s amsl define
  [ARM] 3425/1: xsc3: need to include pgtable-hwdef.h
  [ARM] Allow un-muxed syscalls to be available for everyone
  [ARM] 3420/1: Missing clobber in example code
  [ARM] nommu: fixups for the exception vectors
  [ARM] nommu: add nommu specific Kconfig and MMUEXT variable in Makefile
  [ARM] nommu: start-up code
  [ARM] nommu: MPU support in boot/compressed/head.S
2006-03-31 21:33:07 -08:00
Adrian Bunk
0cb3463f04 [PATCH] unexport get_wchan
The only user of get_wchan is the proc fs - and proc can't be built modular.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:19:01 -08:00
Paul Brook
6896eec029 [ARM] 3420/1: Missing clobber in example code
Patch from Paul Brook

The example code in the source documentation for __kernel_dmb
clobbers r0 but doesn't list it the asm clobber list.

Signed-off-by: Paul Brook <paul@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-28 22:19:29 +01:00
Russell King
ae574a5d7a Merge nommu tree 2006-03-28 22:05:10 +01:00
Hyok S. Choi
c760fc1997 [ARM] nommu: fixups for the exception vectors
The high page vector (0xFFFF0000) does not supported in nommu mode.
This patch allows the vectors to be 0x00000000 or the begining of DRAM
in nommu mode.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-27 15:18:50 +01:00
Hyok S. Choi
75d90832d5 [ARM] nommu: start-up code
This patch adds nommu version start-up code head-nommu.S.
The common part of the start-up codes is moved to head-common.S.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-27 14:58:25 +01:00
Nicolas Pitre
2ce9804fbd [ARM] 3030/2: fix permission check in the obscur cmpxchg syscall
Patch from Nicolas Pitre

Quoting RMK:

|pte_write() just says that the page _may_ be writable. It doesn't say
|that the MMU is programmed to allow writes. If pte_dirty() doesn't
|return true, that means that the page is _not_ writable from userspace.
|If you write to it from kernel mode (without using put_user) you'll
|bypass the MMU read-only protection and may end up writing to a page
|owned by two separate processes.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-25 22:44:05 +00:00
Russell King
0003cedfc5 Merge nommu tree
Fix merge conflict in arch/arm/mm/proc-xscale.S

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-25 22:08:55 +00:00
Russell King
091c539f08 [ARM] SMP: don't set cpu_*_map in smp_prepare_boot_cpu
The recent addition of boot_cpu_init() implements the initialisation
of the online, present and possible cpu maps for the boot CPU, so
there is no reason to duplicate this in the architecture
smp_prepare_boot_cpu() hook.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-25 21:37:29 +00:00
Russell King
9c42954dfd [ARM] Move enable_irq and disable_irq to assembler.h
5d25ac038a broke VFP builds due to
enable_irq not being defined as an assembly macro.  Move it to
assembler.h so everyone can use it.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-23 16:59:37 +00:00
Russell King
bec1b81936 [ARM] Quieten spurious IRQ detection
Only issue a "nobody cared" warning after 99900 spurious interrupts.
This avoids the occasional spurious interrupt causing warnings, as
per x86.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-22 10:22:58 +00:00
Russell King
d2a02b93cf [ARM] Convert kmalloc+memset to kzalloc
Convert all uses of kmalloc followed by memset to use kzalloc instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-21 22:06:17 +00:00
Nicolas Pitre
a61ea9326d [ARM] 3261/2: remove phys_ram from struct machine_desc (part 3)
Patch from Nicolas Pitre

This field is redundent since it must be equal to PHYS_OFFSET anyway.

There is no reference to it anymore so remove it at last.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-21 22:05:58 +00:00
Russell King
5d25ac038a [ARM] Move IRQ enable after coprocessor number decode
Allow the individual coprocessor handlers to decide when to enable
interrupts, rather than unconditionally enabling them.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-21 22:05:50 +00:00
Russell King
f78f104368 [ARM] Remove unnecessary asm/hardware.h includes
asm/hardware.h is not required for the majority of processor support
files, ioremap support, mm initialisation, acorn IO support, nor
the debug code (which picks up its machine specific includes via
debug-macros.S)

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-21 22:05:50 +00:00
Russell King
0f44ba1d1e [ARM] Move read of processor ID out of lookup_processor_type()
Read the processor ID at boot, and save it in "processor_id" as we
did before.  Later, when we re-parse the CPU type in the setup.c code,
re-use the value stored in "processor_id".

This allows a cleaner work-around for noMMU devices without CP#15.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-21 22:03:22 +00:00
Hyok S. Choi
f24284adcd [ARM] noMMU: block sys_fork in nommu mode
The sys_fork is not supported in nommu mode. The other syscalls
that is not supported in nommu mode are to be defined as cond_signal
in kernel/sys_ni.c.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-21 22:03:19 +00:00
Ben Dooks
4333298965 [ARM] 3362/1: [cleanup] - duplicate decleration of mem_fclk_21285
Patch from Ben Dooks

arch/arm/kernel/setup.c declares mem_fclk_21285 when
this is already declared in include/asm-arm/system.h

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-15 23:18:08 +00:00
Ben Dooks
0fc1c83212 [ARM] 3365/1: [cleanup] header for compat.c exported functions
Patch from Ben Dooks

arch/arm/kernel/compat.c exports two functions,
convert_to_tag_list and squash_mem_tags which
are not defined in any header files, and not
used outside arch/arm/kernel.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-15 23:17:30 +00:00
Ben Dooks
84dff1a730 [ARM] 3363/1: [cleanup] process.c - fix warnings
Patch from Ben Dooks

Fix the following warnings from sparse:

arch/arm/kernel/process.c:86:6: warning: symbol 'default_idle' was not declared. Should it be static?
arch/arm/kernel/process.c:378:5: warning: symbol 'dump_fpu' was not declared.   Should it be static?

Include <linux/elfcore.h> for dump_fpu() decleration, and
make default_idle() static as it is not used outside the file.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-15 23:17:23 +00:00
Russell King
17320a9644 [ARM] Fix "thead" typo
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-15 14:57:13 +00:00
Russell King
cdaabbd74b [ARM] iwmmxt thread state alignment
This patch removes the reliance of iwmmxt on hand coded alignments.
Since thread_info is always 8K aligned, specifying that fpstate is
8-byte aligned achieves the same effect without needing to resort
to hand coded alignments.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-12 22:36:06 +00:00
Tony Lindgren
69239749e1 [PATCH] fix next_timer_interrupt() for hrtimer
Also from Thomas Gleixner <tglx@linutronix.de>

Function next_timer_interrupt() got broken with a recent patch
6ba1b91213 as sys_nanosleep() was moved to
hrtimer.  This broke things as next_timer_interrupt() did not check hrtimer
tree for next event.

Function next_timer_interrupt() is needed with dyntick (CONFIG_NO_IDLE_HZ,
VST) implementations, as the system can be in idle when next hrtimer event
was supposed to happen.  At least ARM and S390 currently use
next_timer_interrupt().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-06 18:40:44 -08:00
Russell King
43cc19816b [ARM] CONFIG_CPU_MPCORE -> CONFIG_CPU_32v6K
CONFIG_CPU_MPCORE has never been a configuration symbol - it should
be CONFIG_CPU_32v6K.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-22 21:13:28 +00:00
Russell King
31867499b2 [ARM] Add panic-on-oops support
Although you could ask the kernel for panic-on-oops, it remained
non-functional because the architecture specific code fragment had
not been implemented.  Add it, so it works as advertised.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-22 09:33:22 +00:00
Nicolas Pitre
6c0fa49b18 [ARM] 3338/1: old ABI compat: sys_socketcall
Patch from Nicolas Pitre

Commit 99595d0237 forgot to intercept
sys_socketcall as well.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-16 22:36:13 +00:00
Russell King
7bbb794031 [ARM] Fix SMP initialisation oops
A change to the SMP initialisation caused the following oops:

 CPU1: Booted secondary processor
 CPU1: D VIPT write-back cache
 CPU1: I cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets
 CPU1: D cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets
 <7>Calibrating delay loop... 83.14 BogoMIPS (lpj=415744)
 <1>Unable to handle kernel NULL pointer dereference at virtual address 0000001c
 ...
 PC is at enqueue_task+0x1c/0x64
 LR is at activate_task+0xcc/0xe4

SMP initialisation now requires cpu_possible_map to be initialised in
setup_arch().  Move this from smp_prepare_cpus() to smp_init_cpus()
and call it from our setup_arch() if CONFIG_SMP is enabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-16 11:08:09 +00:00
Nicolas Pitre
5964eae835 [ARM] 3310/1: add a comment about the possible __kuser_cmpxchg transient false
negative

Patch from Nicolas Pitre

The pre ARMv5 implementation can be aborted if an exception occurs in
the middle of it.  Because of that, the ARMv6 implementation doesn't
re-attempt the operation on a failed strex either.  Let's make this
transient nature of such a false positive more explicit in the
definition.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-08 21:19:37 +00:00
Nicolas Pitre
49bca4c281 [ARM] 3309/1: disable the pre-ARMv5 NPTL kernel helper in the non MMU case
Patch from Nicolas Pitre

The cmpxchg emulation on pre-ARMv5 relies on user code executed from a
kernel address.  If the operation cannot complete atomically, it is
aborted from the usr_entry macro by clearing the Z flag.  This clearing
of the Z flag is done whenever the user pc is above TASK_SIZE.

However this "pc >= TASK_SIZE" test cannot work in the non MMU case.
Worse: the current code will corrupt the Z flag on every entry to the
kernel.

Let's disable it in the non MMU case for now.  Using NPTL on non MMU
targets needs to be worked out anyway.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-08 21:19:37 +00:00
Nicolas Pitre
99595d0237 [ARM] 3308/1: old ABI compat: struct sockaddr_un
Patch from Nicolas Pitre

struct sockaddr_un loses its padding with EABI.  Since the size of the
structure is used as a validation test in unix_mkname(), we need to
change the length argument to 110 whenever it is 112.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-08 21:19:36 +00:00
Al Viro
fa1b4f91d6 [ARM] safer handling of syscall table padding
ARM entry-common.S needs to know syscall table size; in itself that would
not be a problem, but there's an additional constraint - some of the
instructions using it want a constant that would be a multiple of 4.
So we have to pad syscall table with sys_ni_syscall and that's where
the trouble begins.  .rept pseudo-op wants a constant expression for
number of repetitions and subtraction of two labels (before and after
syscall table) doesn't always get simplified to constant early enough
for .rept.  If labels end up in different frags, we lose.  And while
the frag size is large enough (slightly below 4Kb), the syscall table
is about 1/3 of that.  We used to get away with that, but the recent
changes had been enough to trigger the breakage.

Proper fix is simple: have a macro (CALL(x)) to populate the table
instead of using explicit .long x and the first time we include calls.S
have it defined to .equ NR_syscalls,NR_syscalls+1.  Then we can find
the proper amount of padding on the first inclusion simply by looking
at NR_syscalls at that time.  And that will be constant, no matter what.

Moreover, the same trick kills the need of having an estimate of padded
NR_syscalls - it will be calculated for free at the same time.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-19 12:57:01 +00:00
Nicolas Pitre
5e0974459d [ARM] 3271/1: ARM EABI: fix calling of cmpxchg syscall emulation
Patch from Nicolas Pitre

This is kernel provided user space code.

Since a syscall is used, it has to be updated to work with EABI.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-18 22:38:49 +00:00
Nicolas Pitre
fcca538b83 [ARM] 3270/1: ARM EABI: fix sigreturn and rt_sigreturn
Patch from Nicolas Pitre

The signal return path consists of user code provided by the kernel.
Since a syscall is used, it has to be updated to work with EABI.

Noticed by Daniel Jacobowitz.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-18 22:38:47 +00:00
Linus Torvalds
8d5c315059 Merge master.kernel.org:/home/rmk/linux-2.6-arm 2006-01-14 19:43:21 -08:00
Nicolas Pitre
3f471126ee [ARM] 3262/4: allow ptraced syscalls to be overriden
Patch from Nicolas Pitre

This is needed by strace to properly handle the tracing of some system
calls. It could be useful for other applications as well.

Based on an earlier patch from Daniel Jacobowitz.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Daniel Jacobowitz <dan@debian.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 19:30:04 +00:00
Nicolas Pitre
dd35afc22b [ARM] 3110/5: old ABI compat: multi-ABI syscall entry support
Patch from Nicolas Pitre

This patch adds the required code to support both user space ABIs at
the same time. A second syscall table is created to include legacy ABI
syscalls that need an ABI compat wrapper.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 16:36:12 +00:00
Nicolas Pitre
687ad01914 [ARM] 3109/1: old ABI compat: syscall wrappers for ABI impedance matching
Patch from Nicolas Pitre

The difference between EABI and the legacy ABI may affect either
structure member alignment and/or argument register selection.

The patch has the details.

Included are wrappers for the following syscalls:

  sys_stat64
  sys_lstat64
  sys_fstat64
  sys_fcntl64
  sys_epoll_ctl
  sys_epoll_wait
  sys_ipc
  sys_semop
  sys_semtimedop
  sys_pread64
  sys_pwrite64
  sys_truncate64
  sys_ftruncate64
  sys_readahead

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 16:35:31 +00:00
Nicolas Pitre
713c481519 [ARM] 3108/2: old ABI compat: statfs64 and fstatfs64
Patch from Nicolas Pitre

struct statfs64 has extra padding with EABI growing its size from 84 to
88. This struct is now __attribute__((packed,aligned(4))) with a small
assembly wrapper to force the sz argument to 84 if it is 88 to avoid
copying the extra padding over user space memory unexpecting it.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 16:35:03 +00:00
Nicolas Pitre
3f2829a315 [ARM] 3105/4: ARM EABI: new syscall entry convention
Patch from Nicolas Pitre

For a while we wanted to change the way syscalls were called on ARM.
Instead of encoding the syscall number in the swi instruction which
requires reading back the instruction from memory to extract that number
and polluting the data cache, it was decided that simply storing the
syscall number into r7 would be more efficient. Since this represents
an ABI change then making that change at the same time as EABI support
is the right thing to do.

It is now expected that EABI user space binaries put the syscall number
into r7 and use "swi 0" to call the kernel. Syscall register argument
are also expected to have "EABI arrangement" i.e. 64-bit arguments
should be put in a pair of registers from an even register number.

Example with long ftruncate64(unsigned int fd, loff_t length):

	legacy ABI:
	- put fd into r0
	- put length into r1-r2
	- use "swi #(0x900000 + 194)" to call the kernel

	new ARM EABI:
	- put fd into r0
	- put length into r2-r3 (skipping over r1)
	- put 194 into r7
	- use "swi 0" to call the kernel

Note that it is important to use 0 for the swi argument as backward
compatibility with legacy ABI user space relies on this.
The syscall macros in asm-arm/unistd.h were also updated to support
both ABIs and implement the right call method automatically.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 16:31:29 +00:00
Nicolas Pitre
ba95e4e4a0 [ARM] 3104/1: ARM EABI: new helper function names
Patch from Nicolas Pitre

The ARM EABI defines new names for GCC helper functions.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 16:18:29 +00:00
Nicolas Pitre
499b2ea11f [ARM] 3103/1: ARM EABI: stack pointer must be 64-bit aligned (part 2)
Patch from Nicolas Pitre

We must make sure that assembly code that modifies the stack pointer
before calling a C function does it so it remains 64-bit aligned.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 16:18:09 +00:00
Nicolas Pitre
2dede2d8e9 [ARM] 3102/1: ARM EABI: stack pointer must be 64-bit aligned after a CPU exception
Patch from Nicolas Pitre

The ARM EABI says that the stack pointer has to be 64-bit aligned for
reasons already mentioned in patch #3101 when calling C functions.

We therefore must verify and adjust sp accordingly when taking an
exception from kernel mode since sp might not necessarily be 64-bit
aligned if the exception occurs in the middle of a kernel function.

If the exception occurs while in user mode then no sp fixup is needed as
long as sizeof(struct pt_regs) as well as any additional syscall data
stack space remain multiples of 8.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-14 16:18:08 +00:00
Hyok S. Choi
afeb90ca08 [ARM] Support register switch in nommu mode
This patch adds register switch support in nommu mode.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-13 21:05:25 +00:00
Nicolas Pitre
2df96b34aa [ARM] 3259/1: remove phys_ram from struct machine_desc (part 1)
Patch from Nicolas Pitre

This field is redundent since it must be equal to PHYS_OFFSET anyway.

First, let's  use PHYS_OFFSET directly instead.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-13 20:51:46 +00:00
Russell King
e08b754161 [PATCH] Add ecard_bus_type probe/remove/shutdown methods
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-13 11:26:05 -08:00
Linus Torvalds
bf785ee0ae Merge master.kernel.org:/home/rmk/linux-2.6-arm 2006-01-12 12:23:49 -08:00
Arjan van de Ven
00431707be [ARM] Convert some arm semaphores to mutexes
The arm clock semaphores are strict mutexes, convert them to the new
mutex implementation

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-12 18:42:23 +00:00
Al Viro
32d39a9355 [PATCH] arm: task_stack_page()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12 09:08:56 -08:00
Al Viro
5520582392 [PATCH] arm: end_of_stack()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12 09:08:56 -08:00
Al Viro
815d5ec86e [PATCH] arm: task_pt_regs()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12 09:08:55 -08:00
Al Viro
e7c1b32fd3 [PATCH] arm: task_thread_info()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12 09:08:55 -08:00
Catalin Marinas
90303b1023 [ARM] 3256/1: Make the function-returning ldm's use sp as the base register
Patch from Catalin Marinas

If the low interrupt latency mode is enabled for the CPU (from ARMv6
onwards), the ldm/stm instructions are no longer atomic. An ldm instruction
restoring the sp and pc registers can be interrupted immediately after sp
was updated but before the pc. If this happens, the CPU restores the base
register to the value before the ldm instruction but if the base register
is not sp, the interrupt routine will corrupt the stack and the restarted
ldm instruction will load garbage.

Note that future ARM cores might always run in the low interrupt latency
mode.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-12 16:53:51 +00:00
Catalin Marinas
6b090a25fe [ARM] 3234/1: Update cpu_architecture() to deal with the new ID format
Patch from Catalin Marinas

Since ARM1176, the CPU ID format has changed and it will also be used for
future ARM architectures.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-12 16:28:16 +00:00
Randy Dunlap
a941564458 [PATCH] capable/capability.h (arch/)
arch: Use <linux/capability.h> where capable() is used.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-11 18:42:14 -08:00
Russell King
16ed926eee [ARM] Only call set_type method in setup_irq if it's defined
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-09 19:19:18 +00:00
Andrew Morton
a136564702 [PATCH] remove gcc-2 checks
Remove various things which were checking for gcc-1.x and gcc-2.x compilers.

From: Adrian Bunk <bunk@stusta.de>

    Some documentation updates and removes some code paths for gcc < 3.2.

Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08 20:14:02 -08:00
Russell King
9ded96f24c [PATCH] IRQ type flags
Some ARM platforms have the ability to program the interrupt controller to
detect various interrupt edges and/or levels.  For some platforms, this is
critical to setup correctly, particularly those which the setting is dependent
on the device.

Currently, ARM drivers do (eg) the following:

	err = request_irq(irq, ...);

	set_irq_type(irq, IRQT_RISING);

However, if the interrupt has previously been programmed to be level sensitive
(for whatever reason) then this will cause an interrupt storm.

Hence, if we combine set_irq_type() with request_irq(), we can then safely set
the type prior to unmasking the interrupt.  The unfortunate problem is that in
order to support this, these flags need to be visible outside of the ARM
architecture - drivers such as smc91x need these flags and they're
cross-architecture.

Finally, the SA_TRIGGER_* flag passed to request_irq() should reflect the
property that the device would like.  The IRQ controller code should do its
best to select the most appropriate supported mode.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08 20:13:46 -08:00
Richard Purdie
53b7c2b243 [ARM] 3229/1: Remove uneeded ARM apm dependency on PM_LEGACY
Patch from Richard Purdie

ARM doesn't use ACPI so ARM's apm implementation has no need to depend
on PM_LEGACY. This patch removes that dependency.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-05 20:44:55 +00:00
Russell King
d7b4a75677 [ARM] Move DMA exports to be next to each function
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 15:52:45 +00:00
Russell King
95ba9fb06b [ARM] Remove definition of MAX_DMA_CHANNELS to zero
Since we now only build arch/arm/kernel/dma.c on machine types
which set ISA_DMA_API, we don't need to define MAX_DMA_CHANNELS
to 0 to indicate this - this definition becomes superfluous.
Remove it.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 15:51:51 +00:00
Russell King
065909b915 [ARM] Refine selection of ISA_DMA_API and generic dma.c code
ISA_DMA_API tells the rest of the kernel if the ISA DMA API is
available.  Select this symbol only on machine types which make
use of the ISA DMA API.

Make building of arch/arm/kernel/dma.c depend on this symbol -
if a machine does not support the ISA DMA API, it's pointless
building this file.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 15:44:16 +00:00
Russell King
6842b92992 [ARM] Use core_initcall() to initialise ARM DMA
There's no need to have DMA initialised at the same time as
interrupts.  Move it to a core_initcall().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 15:17:08 +00:00
Russell King
7cdad48297 [ARM] Remove '__address' from scatterlist and convert to DMA API
The old __address element in struct scatterlist remained from older
kernels because the ARM DMA emulation code made use of it.  Move
this field into struct dma_struct, and convert DMA emulation code
to setup a SG entry as required.

Also, convert DMA emulation code to use the new DMA API rather
than the PCI DMA API.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 15:08:30 +00:00
Russell King
333c9624b7 [ARM] Move ISA DMA bus_to_virt() out of set_dma_addr()
Allow the compiler to optimise the bus_to_virt(virt_to_bus())
transformation in the ARM ISA DMA interface.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 14:41:29 +00:00
Russell King
78ff18a412 [ARM] Cleanup ARM includes
arch/arm/kernel/entry-armv.S has contained a comment suggesting
that asm/hardware.h and asm/arch/irqs.h should be moved into the
asm/arch/entry-macro.S include.  So move the includes to these
two files as required.

Add missing includes (asm/hardware.h, asm/io.h) to asm/arch/system.h
includes which use those facilities, and remove asm/io.h from
kernel/process.c.

Remove other unnecessary includes from arch/arm/kernel, arch/arm/mm
and arch/arm/mach-footbridge.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-03 17:39:34 +00:00
Russell King
9d4f13e531 [ARM] Make kernel link address depend on PAGE_OFFSET
We are coding the kernel link address into the makefiles, which is
invisibly dependent on PAGE_OFFSET.  If PAGE_OFFSET is changed, the
makefiles also need to be changed.

Make adjustments such that the makefiles encode just the offset from
PAGE_OFFSET for the kernel link address, and use PAGE_OFFSET in the
linker scripts directly.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-03 17:28:33 +00:00
Nicolas Pitre
7c612bfd4e [ARM] 3210/1: add missing memory barrier helper for NPTL support
Patch from Nicolas Pitre

Strictly speaking, the NPTL kernel helpers are required for pre ARMv6
only.  They are available on ARMv6+ as well for obvious compatibility
reasons.  However there are cases where extra memory barriers are needed
when using an SMP ARMv6 machine but not on pre-ARMv6.

This patch adds a memory barrier kernel helper that glibc can use as
needed for pre-ARMv6 binaries to be forward compatible with an SMP
kernel on ARMv6, as well as the necessary dmb instructions to the
cmpxchg helper.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Acked-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-12-19 22:20:51 +00:00
Russell King
567bd98017 [ARM] Fix sys_sendto and sys_recvfrom 6-arg syscalls
Rather than providing more wrappers for 6-arg syscalls, arrange for
them to be supported as standard.  This just means that we always
store the 6th argument on the stack, rather than in the wrappers.

This means we eliminate the wrappers for:
* sys_futex
* sys_arm_fadvise64_64
* sys_mbind
* sys_ipc

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-12-17 15:25:42 +00:00
Daniel Jacobowitz
c2e2611425 [ARM] 3205/1: Handle new EABI relocations when loading kernel modules.
Patch from Daniel Jacobowitz

Handle new EABI relocations when loading kernel modules.  This is
necessary for CONFIG_AEABI kernels, and also for some broken
(since fixed) old ABI toolchains.

Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-12-14 22:04:22 +00:00
Nikola Valerjev
22f975f4ff [ARM] 3200/1: Singlestep over ARM BX and BLX instructions using ptrace fix
Patch from Nikola Valerjev

Single stepping an application using ptrace() fails over ARM instructions BX and BLX.

Steps to reproduce:

Compile and link the following files

main.c
-----
void foo();
int main() {
    foo();
    return 0;
}

foo.s
-----
	.text
	.globl foo
foo:
	BX LR

Using ptrace() functionality, run to main(), and start singlestepping.
Singlestep over \"BX LR\" instruction won\'t transfer the control back
to main, but run the code to completion.

This problems seems to be in the function get_branch_address() in
arch/arm/kernel/ptrace.c. The function doesn\'t seem to recognize BX
and BLX instructions as branches. BX and BLX instructions can be used
to convert from ARM to Thumb mode if the target address has the low
bit set. However, they are also perfectly legal in the ARM only mode.
Although other things in the kernel seem to indicate that only ARM
mode is accepted (and not Thumb), many compilers will generate BX
and BLX instructions even when generating ARM only code.

Signed-off-by: Nikola Valerjev <nikola@ghs.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-12-10 11:59:15 +00:00
Russell King
3c0bdac387 [ARM] Remove mach-types.h from head.S
We don't really need to check whether the machine type is Netwinder
or CATS before setting up the PCI IO mapping for debugging.  This
allows us to eliminate asm/mach-types.h from head.S

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-25 15:43:22 +00:00
Daniel Jacobowitz
a6c61e9dfd [ARM] 3168/1: Update ARM signal delivery and masking
Patch from Daniel Jacobowitz

After delivering a signal (creating its stack frame) we must check for
additional pending unblocked signals before returning to userspace.
Otherwise signals may be delayed past the next syscall or reschedule.

Once that was fixed it became obvious that the ARM signal mask manipulation
was broken.  It was a little bit broken before the recent SA_NODEFER
changes, and then very broken after them.  We must block the requested
signals before starting the handler or the same signal can be delivered
again before the handler even gets a chance to run.

Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-19 10:01:07 +00:00
Russell King
d2c5b69099 [ARM] Fix get_user when passed a const pointer
Unfortunately, later gcc versions error out when our get_user is passed
a const pointer, since we write to a temporary variable declared as
typeof(*(p)) which propagates the const-ness.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-18 14:22:03 +00:00
Russell King
728f5c076a [ARM] Improve comment about ASSERT()s in vmlinux.lds.S
Provide folk with an idea what to do if the ASSERT statements fail
with their linker.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-17 16:43:14 +00:00
Linus Torvalds
70ac551651 Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-11-13 18:17:54 -08:00
Jeff Garzik
bca73e4bf8 [PATCH] move pm_register/etc. to CONFIG_PM_LEGACY, pm_legacy.h
Since few people need the support anymore, this moves the legacy
pm_xxx functions to CONFIG_PM_LEGACY, and include/linux/pm_legacy.h.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-13 18:14:10 -08:00
Russell King
da2660d2c4 [ARM] Restore apparant pointless change in arch/arm/kernel/smp.c
Restore smp.c back to how it used to be.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-12 17:21:47 +00:00
Linus Torvalds
ac111bfaa6 Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-11-09 08:55:53 -08:00
Nick Piggin
64c7c8f885 [PATCH] sched: resched and cpu_idle rework
Make some changes to the NEED_RESCHED and POLLING_NRFLAG to reduce
confusion, and make their semantics rigid.  Improves efficiency of
resched_task and some cpu_idle routines.

* In resched_task:
- TIF_NEED_RESCHED is only cleared with the task's runqueue lock held,
  and as we hold it during resched_task, then there is no need for an
  atomic test and set there. The only other time this should be set is
  when the task's quantum expires, in the timer interrupt - this is
  protected against because the rq lock is irq-safe.

- If TIF_NEED_RESCHED is set, then we don't need to do anything. It
  won't get unset until the task get's schedule()d off.

- If we are running on the same CPU as the task we resched, then set
  TIF_NEED_RESCHED and no further action is required.

- If we are running on another CPU, and TIF_POLLING_NRFLAG is *not* set
  after TIF_NEED_RESCHED has been set, then we need to send an IPI.

Using these rules, we are able to remove the test and set operation in
resched_task, and make clear the previously vague semantics of
POLLING_NRFLAG.

* In idle routines:
- Enter cpu_idle with preempt disabled. When the need_resched() condition
  becomes true, explicitly call schedule(). This makes things a bit clearer
  (IMO), but haven't updated all architectures yet.

- Many do a test and clear of TIF_NEED_RESCHED for some reason. According
  to the resched_task rules, this isn't needed (and actually breaks the
  assumption that TIF_NEED_RESCHED is only cleared with the runqueue lock
  held). So remove that. Generally one less locked memory op when switching
  to the idle thread.

- Many idle routines clear TIF_POLLING_NRFLAG, and only set it in the inner
  most polling idle loops. The above resched_task semantics allow it to be
  set until before the last time need_resched() is checked before going into
  a halt requiring interrupt wakeup.

  Many idle routines simply never enter such a halt, and so POLLING_NRFLAG
  can be always left set, completely eliminating resched IPIs when rescheduling
  the idle task.

  POLLING_NRFLAG width can be increased, to reduce the chance of resched IPIs.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 07:56:33 -08:00
Nick Piggin
5bfb5d690f [PATCH] sched: disable preempt in idle tasks
Run idle threads with preempt disabled.

Also corrected a bugs in arm26's cpu_idle (make it actually call schedule()).
How did it ever work before?

Might fix the CPU hotplugging hang which Nigel Cunningham noted.

We think the bug hits if the idle thread is preempted after checking
need_resched() and before going to sleep, then the CPU offlined.

After calling stop_machine_run, the CPU eventually returns from preemption and
into the idle thread and goes to sleep.  The CPU will continue executing
previous idle and have no chance to call play_dead.

By disabling preemption until we are ready to explicitly schedule, this bug is
fixed and the idle threads generally become more robust.

From: alexs <ashepard@u.washington.edu>

  PPC build fix

From: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>

  MIPS build fix

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 07:56:33 -08:00
Nicolas Pitre
c906107bb7 [ARM] 3100/1: simplify a pointer computation
Patch from Nicolas Pitre

Looks clearer this way.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-09 14:09:31 +00:00
Russell King
72274c9e24 Merge with ARM SMP tree 2005-11-08 22:43:44 +00:00
Nicolas Pitre
d07ad967e3 [ARM] 3134/1: add missing EXPORT_SYMBOL for the ARM version of sha_transform
Patch from Nicolas Pitre

Noticed by Woody Suwalski <woodys@xandros.com>.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-08 22:43:05 +00:00
Russell King
37ee16ae93 [ARM SMP] Add core ARM support for local timers
Add infrastructure for supporting per-cpu local timers to update
the profiling information and update system time accounting.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-08 19:08:05 +00:00
Russell King
2c25013495 [ARM] More sparse fixes
arch/arm/kernel/irq.c:998:26: warning: Using plain integer as NULL pointer
arch/arm/kernel/smp.c:145:25: warning: Using plain integer as NULL pointer
arch/arm/kernel/smp.c:362:5: warning: symbol 'smp_call_function_on_cpu' was not declared. Should it be static?
drivers/video/amba-clcd.c:521:12: warning: symbol 'amba_clcdfb_init' was not declared. Should it be static?

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-08 14:44:15 +00:00
Russell King
5d43045bcd [ARM SMP] Fix some sparse warnings in SMP code
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-08 10:44:46 +00:00
Christoph Hellwig
481bed4542 [PATCH] consolidate sys_ptrace()
The sys_ptrace boilerplate code (everything outside the big switch
statement for the arch-specific requests) is shared by most architectures.
This patch moves it to kernel/ptrace.c and leaves the arch-specific code as
arch_ptrace.

Some architectures have a too different ptrace so we have to exclude them.
They continue to keep their implementations.  For sh64 I had to add a
sh64_ptrace wrapper because it does some initialization on the first call.
For um I removed an ifdefed SUBARCH_PTRACE_SPECIAL block, but
SUBARCH_PTRACE_SPECIAL isn't defined anywhere in the tree.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-By: David Howells <dhowells@redhat.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:53:42 -08:00
Russell King
1555972231 [ARM] Fix /proc/cpuinfo format for ARM SMP
glibc expects to count lines beginning with "processor" to determine
the number of processors, not lines beginning with "Processor".  So,
give glibc the format it expects.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-06 21:41:08 +00:00
Russell King
32f8b97ca3 [ARM] Don't call dump_cpu_info unless we're booting
We don't want to call dump_cpu_info() from cpu_init() after boot since
it produces a lot of unnecessary noise - since cpu_init() gets called
on resume and hotplug cpu insertion events.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-06 19:49:21 +00:00
Russell King
4fe15ba08f [ARM] Fix second missing declaration of cache_is_vivt()
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-06 19:47:04 +00:00
Russell King
4299051ebe [ARM] Fix missing declaration of cache_is_vivt()
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-06 15:46:57 +00:00
Nicolas Pitre
b7ec479553 [ARM] 3115/1: small optimizations to exception vector entry code
Patch from Nicolas Pitre

Since we know the value of cpsr on entry, we can replace the bic+orr with
a single eor.  Also remove a possible result delay (at least on XScale).

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-06 14:42:37 +00:00
Russell King
a054a81159 [ARM SMP] Add hotplug CPU infrastructure
This patch adds the infrastructure to support hotplug CPU on ARM
platforms.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-02 22:24:33 +00:00
Russell King
273c2cdb2b [ARM SMP] Fix a couple of warnings
Use *cpus_addr() to display the mask of pending/to be called CPUs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-02 21:54:14 +00:00
Russell King
71f512e897 [ARM SMP] Track CPU idle threads
Track the idle thread task_struct for each CPU.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-02 21:51:40 +00:00
Linus Torvalds
1480d0a31d Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-10-30 17:48:00 -08:00
Tim Schmielau
4e57b68178 [PATCH] fix missing includes
I recently picked up my older work to remove unnecessary #includes of
sched.h, starting from a patch by Dave Jones to not include sched.h
from module.h. This reduces the number of indirect includes of sched.h
by ~300. Another ~400 pointless direct includes can be removed after
this disentangling (patch to follow later).
However, quite a few indirect includes need to be fixed up for this.

In order to feed the patches through -mm with as little disturbance as
possible, I've split out the fixes I accumulated up to now (complete for
i386 and x86_64, more archs to follow later) and post them before the real
patch.  This way this large part of the patch is kept simple with only
adding #includes, and all hunks are independent of each other.  So if any
hunk rejects or gets in the way of other patches, just drop it.  My scripts
will pick it up again in the next round.

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-30 17:37:32 -08:00
Thomas Gleixner
ecea8d19c9 [PATCH] jiffies_64 cleanup
Define jiffies_64 in kernel/timer.c rather than having 24 duplicated
defines in each architecture.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-30 17:37:25 -08:00
Christoph Hellwig
dfb7dac3af [PATCH] unify sys_ptrace prototype
Make sure we always return, as all syscalls should.  Also move the common
prototype to <linux/syscalls.h>

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-30 17:37:20 -08:00
Russell King
d362979aa2 [ARM] Re-organise die()
Provide __die() which can be called from various contexts to provide
an oops report.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-30 19:01:43 +00:00
Hugh Dickins
69b0475456 [PATCH] mm: arm ready for split ptlock
Prepare arm for the split page_table_lock: three issues.

Signal handling's preserve and restore of iwmmxt context currently involves
reading and writing that context to and from user space, while holding
page_table_lock to secure the user page(s) against kswapd.  If we split the
lock, then the structure might span two pages, secured by to read into and
write from a kernel stack buffer, copying that out and in without locking (the
structure is 160 bytes in size, and here we're near the top of the kernel
stack).  Or would the overhead be noticeable?

arm_syscall's cmpxchg emulation use pte_offset_map_lock, instead of
pte_offset_map and mm-wide page_table_lock; and strictly, it should now also
take mmap_sem before descending to pmd, to guard against another thread
munmapping, and the page table pulled out beneath this thread.

Updated two comments in fault-armv.c.  adjust_pte is interesting, since its
modification of a pte in one part of the mm depends on the lock held when
calling update_mmu_cache for a pte in some other part of that mm.  This can't
be done with a split page_table_lock (and we've already taken the lowest lock
in the hierarchy here): so we'll have to disable split on arm, unless
CONFIG_CPU_CACHE_VIPT to ensures adjust_pte never used.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-29 21:40:42 -07:00
Nicolas Pitre
37d07b72ef [ARM] 3061/1: cleanup the XIP link address mess
Patch from Nicolas Pitre

Since vmlinux.lds.S is preprocessed, we can use the defines already
present in asm/memory.h (allowed by patch #3060) for the XIP kernel link
address instead of relying on a duplicated Makefile hardcoded value, and
also get rid of its dependency on awk to handle it at the same time.

While at it let's clean XIP stuff even further and make things clearer
in head.S with a nice code reduction.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-29 21:44:56 +01:00
Nicolas Pitre
f09b997999 [ARM] 3060/1: allow constants found in asm/memory.h to be used in asm code
Patch from Nicolas Pitre

This patch allows for assorted type of cleanups by letting assembly code
use the same set of defines for constant values and avoid duplicated
definitions that might not always be in sync, or that might simply be
confusing due to the different names for the same thing.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-29 21:44:55 +01:00
Nicolas Pitre
a999cb04b4 [ARM] 3035/1: RISCOS compat code fix
Patch from Nicolas Pitre

From: Daniel Jacobowitz <dan@debian.org>

> I also fixed a bug that confused me greatly while trying to debug: one
> SIGILL has long been a SIGSEGV because of some broken RISCOS
> compatibility code.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-28 16:35:46 +01:00
Russell King
f339ab3d6c [ARM] Fix sparse warnings
Fix sparse warnings in arch/arm/kernel/module.c,
arch/arm/mm/consistent.c, drivers/pcmcia/sa1111_generic.c,
and platform support files.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-28 14:29:43 +01:00
Nicolas Pitre
13b1f64c16 [ARM] 3008/1: the exception table is not read-only
Patch from Nicolas Pitre

... and therefore should not live in the .text section.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-13 22:04:37 +01:00
Ben Dooks
a7b1bbbc89 [ARM] 2977/1: armksyms.c - make items in export table static
Patch from Ben Dooks

The items in the export table do not need to be
exported elsehwere, so quash the sparse warning
by making the symbol for the table entry static.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-12 19:58:07 +01:00
Nicolas Pitre
60ac133aac [ARM] 2974/1: fix ARM710 swi bug workaround
Patch from Nicolas Pitre

Either no one is using an ARM710 with recent kernels, or all ARM710s
still in use are not afflicted by this swi bug.  Nevertheless, the code
to work around the ARM710 swi bug is itself currently buggy since it
uses r8 as a pointer to S_PC while in fact it holds the spsr content
these days. Fix that, and simplify the code as well.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-12 19:51:24 +01:00
Nicolas Pitre
c2f480869f [ARM] 2952/1: fix a register clobber list
Patch from Nicolas Pitre

If gcc decides to assign lr to %0 we're screwed.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-04 23:17:53 +01:00
Nicolas Pitre
74f8849496 [ARM] 2951/1: fix wrong comment
Patch from Nicolas Pitre

The cmpxchg emulation syscall needs write access.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-04 23:17:52 +01:00
Russell King
d2f607484f [ARM] Fix compiler warnings for memcpy_toio/memcpy_fromio/memset_io
Add 'volatile' to the __iomem pointers for these functions as
per x86.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-24 10:42:06 +01:00
Russell King
73394322a4 [ARM] Fix context switch with ARMv6 + TLS
We accidentally corrupted the TLS value when clearing out the ARMv6
exclusive monitor.  Avoid doing so.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-23 21:49:58 +01:00
Catalin Marinas
6a1ced59b3 [ARM] 2932/1: Avoid the "noreturn" warning in arch/arm/kernel/traps.c
Patch from Catalin Marinas

This patch prevents the "noreturn function does return" warning in the
__bug() function in arch/arm/kernel/traps.c

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-21 22:14:05 +01:00
Ben Dooks
9d0fd1eb8a [ARM] 2927/1: .arch.info - postfix section with .init for make buildcheck
Patch from Ben Dooks

The `make buildcheck` is erroneously reporting that the .arch.info
list is referencing items in the .init section as it is not itself
postfixed with .init

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-20 16:45:20 +01:00
Ben Dooks
02b7dd1244 [ARM] 2926/1: .proc.info - postfix section with .init for make buildcheck
Patch from Ben Dooks

The `make buildcheck` is erroneously reporting that the .proc.info
list is referencing items in the .init section as it is not itself
postfixed with .init

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-20 16:35:03 +01:00
Ben Dooks
bfe6815e04 [ARM] 2925/3: earlyparam - postfix section with .init for make buildcheck
Patch from Ben Dooks

The `make buildcheck` is erroneously reporting that the earlyparam
list is referencing items in the .init section as it is not itself
postfixed with .init
Also, as per rmk's suggestion, rename the __early_param to
.early_param to bring it into line with everything else

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-20 16:25:12 +01:00
Ben Dooks
9506057fca [ARM] 2924/3: taglist - postfix section with .init for make buildcheck
Patch from Ben Dooks

The `make buildcheck` is erroneously reporting that the taglist
is referencing items in the .init section as it is not itself
postfixed with .init

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-20 16:20:49 +01:00
Russell King
63150fcf73 [ARM] Fix warning in arch/arm/kernel/semaphore.c
Newer binutils complains:
/tmp/cc07pbI9.s:146: Warning: ignoring changed section type for .sched.text

Fix this warning by adding %progbits to the .section.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-18 21:49:29 +01:00
George G. Davis
34f521fd55 [ARM] 2896/1: Add sys_ipc_wrapper to pass 'fifth' argument on stack
Patch from George G. Davis

As pointed out be Matthew Klahn <MKLAHN@motorola.com>, some sys_ipc()
call options require six args, e.g. SEMTIMEDOP. This patch adds an ARM sys_ipc_wrapper to save the sys_ipc() 'fifth' arg on the stack.

Signed-off-by: George G. Davis <gdavis@mvista.com>
 arch/arm/kernel/calls.S        |    2 +-
 arch/arm/kernel/entry-common.S |    5 +++++
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-13 22:55:00 +01:00
Linus Torvalds
abf914208a Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-09-10 10:16:47 -07:00
Sam Ravnborg
e6ae744dd2 kbuild: arm - use generic asm-offsets.h support
Delete obsoleted stuff from arch Makefile and rename
constants.h to asm-offsets.h

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2005-09-09 21:08:59 +02:00
Russell King
9b9eb8c061 [ARM] sys_mbind needs wrapping
sys_mbind is a 6-arg syscall, hence needs wrapping to save the
sixth argument.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-09 18:35:12 +01:00
Russell King
9c2c389307 [ARM] Add memory type based allocation syscalls
Add syscall numbers and syscall table entries for mbind,
set_mempolicy and get_mempolicy.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-09 11:12:51 +01:00
john stultz
b149ee2233 [PATCH] NTP: ntp-helper functions
This patch cleans up a commonly repeated set of changes to the NTP state
variables by adding two helper inline functions:

ntp_clear(): Clears the ntp state variables

ntp_synced(): Returns 1 if the system is synced with a time server.

This was compile tested for alpha, arm, i386, x86-64, ppc64, s390, sparc,
sparc64.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:34 -07:00
Russell King
664399e1fb [ARM] Wrap calls to descriptor handlers
This is part of Thomas Gleixner's generic IRQ patch, which converts
ARM to use the generic IRQ subsystem.  Here, we wrap calls to
desc->handler() in an inline function, desc_handle_irq().  This
reduces the size of Thomas' patch since the changes become more
localised.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-04 19:45:00 +01:00
Russell King
7801907b8c [ARM] Change irq_chip wake/type methods to set_wake/set_type
This is part of Thomas Gleixner's generic IRQ patch, which converts
ARM to use the generic IRQ subsystem.  Here, we rename two of the
irq_chip methods - wake becomes set_wake, and type becomes set_type.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-04 19:43:13 +01:00
Russell King
7db078be19 [ARM] Stack starts at THREAD_START_SP offset, not THREAD_SIZE-8
Use the correct constants.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-04 11:03:15 +01:00
Nicolas Pitre
68d9102f76 [ARM] 2865/2: fix fadvise64_64 syscall argument passing
Patch from Nicolas Pitre

The prototype for sys_fadvise64_64() is:
    long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
The argument list is therefore as follows on legacy ABI:
	fd: type int (r0)
	offset: type long long (r1-r2)
	len: type long long (r3-sp[0])
	advice: type int (sp[4])
With EABI this becomes:
	fd: type int (r0)
	offset: type long long (r2-r3)
	len: type long long (sp[0]-sp[4])
	advice: type int (sp[8])
Not only do we have ABI differences here, but the EABI version requires
one additional word on the syscall stack.
To avoid the ABI mismatch and the extra stack space required with EABI
this syscall is now defined with a different argument ordering
on ARM as follows:
    long sys_arm_fadvise64_64(int fd, int advice, loff_t offset, loff_t len)
This gives us the following ABI independent argument distribution:
	fd: type int (r0)
	advice: type int (r1)
	offset: type long long (r2-r3)
	len: type long long (sp[0]-sp[4])
Now, since the syscall entry code takes care of 5 registers only by
default including the store of r4 to the stack, we need a wrapper to
store r5 to the stack as well.  Because that wrapper was missing and was
always required this means that sys_fadvise64_64 never worked on ARM and
therefore we can safely reuse its syscall number for our new
sys_arm_fadvise64_64 interface.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-01 12:37:13 +01:00
Ben Dooks
3618886f64 [ARM] 2857/2: Dynamic tick - fix OOPS if configured and not provided
Patch from Ben Dooks

timer_dyn_reprogram() fails with an OOPS if the
configuration for CONFIG_NO_IDLE_HZ is enabled, and
the system has no support for it.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-31 09:42:14 +01:00
Steven Rostedt
69be8f1896 [PATCH] convert signal handling of NODEFER to act like other Unix boxes.
It has been reported that the way Linux handles NODEFER for signals is
not consistent with the way other Unix boxes handle it.  I've written a
program to test the behavior of how this flag affects signals and had
several reports from people who ran this on various Unix boxes,
confirming that Linux seems to be unique on the way this is handled.

The way NODEFER affects signals on other Unix boxes is as follows:

1) If NODEFER is set, other signals in sa_mask are still blocked.

2) If NODEFER is set and the signal is in sa_mask, then the signal is
still blocked. (Note: this is the behavior of all tested but Linux _and_
NetBSD 2.0 *).

The way NODEFER affects signals on Linux:

1) If NODEFER is set, other signals are _not_ blocked regardless of
sa_mask (Even NetBSD doesn't do this).

2) If NODEFER is set and the signal is in sa_mask, then the signal being
handled is not blocked.

The patch converts signal handling in all current Linux architectures to
the way most Unix boxes work.

Unix boxes that were tested:  DU4, AIX 5.2, Irix 6.5, NetBSD 2.0, SFU
3.5 on WinXP, AIX 5.3, Mac OSX, and of course Linux 2.6.13-rcX.

* NetBSD was the only other Unix to behave like Linux on point #2. The
main concern was brought up by point #1 which even NetBSD isn't like
Linux.  So with this patch, we leave NetBSD as the lonely one that
behaves differently here with #2.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-29 10:03:11 -07:00
Al Viro
33215652e4 [PATCH] qualifiers in return types - easy cases
a bunch of functions switched from volatile to __attribute__((noreturn)) and
from const to __attribute_pure__

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-23 18:43:45 -07:00
Robert Love
498de0cc5e [ARM] Add syscall stubs for inotify and ioprio system calls
Signed-off-by: Robert Love <rml@novell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-15 10:57:08 +01:00
Russell King
b876386ee4 [ARM SMP] Clear the exclusive monitor on ARMv6 CPUs on context switch
Ensure that the exclusive monitor is cleared on context switch with
ARMv6 CPUs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-10 14:52:52 +01:00
Dominik Brodowski
43c3473552 [PATCH] pci and yenta: pcibios_bus_to_resource
In yenta_socket, we default to using the resource setting of the CardBus
bridge.  However, this is a PCI-bus-centric view of resources and thus needs
to be converted to generic resources first.  Therefore, add a call to
pcibios_bus_to_resource() call in between.  This function is a mere wrapper on
x86 and friends, however on some others it already exists, is added in this
patch (alpha, arm, ppc, ppc64) or still needs to be provided (parisc -- where
is its pcibios_resource_to_bus() ?).

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-04 21:32:46 -07:00
Russell King
505d7b1931 [ARM SMP] Ensure secondary CPUs have a clean TLB
Since ARMv6 CPUs will not flush the TLB on context switches, it is
possible that we may end up with some global TLB entries remaining
present, eventually upsetting userspace.  Explicitly flush the
entire TLB on secondary CPUs as they startup, after we have switched
to the init_mm page tables.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-28 20:32:47 +01:00
Eric W. Biederman
59586e5a26 [PATCH] Don't export machine_restart, machine_halt, or machine_power_off.
machine_restart, machine_halt and machine_power_off are machine
specific hooks deep into the reboot logic, that modules
have no business messing with.  Usually code should be calling
kernel_restart, kernel_halt, kernel_power_off, or
emergency_restart. So don't export machine_restart,
machine_halt, and machine_power_off so we can catch buggy users.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-26 14:35:42 -07:00
Russell King
bd6f68af29 [PATCH] ARM SMP: Mark CPU init functions/data with __cpuinit/...data
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-17 21:35:41 +01:00
Russell King
109d89ca0e [PATCH] ARM: Allow register_undef_hook to be called with IRQs off
Preserve the interrupt status across a call to register_undef_hook.
This allows it to be called while interrupts are disabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-16 16:43:33 +01:00
Russell King
73eb7d9e8c [PATCH] ARM SMP: Initialise cpu_present_map
Rather than relying on the fixup code in init/main.c, explicitly
initialise cpu_present_map.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11 19:42:58 +01:00
Russell King
e11b2236ea [PATCH] ARM SMP: We list IRQs for present CPUs, not online CPUs
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11 19:26:31 +01:00
Russell King
d12734d14e [PATCH] ARM SMP: Rename cpu_present_mask to cpu_possible_map
The kernel's terminology for this is cpu_possible_map not
cpu_present_mask.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11 17:38:36 +01:00
Todd Poynor
7bc7fc50ce [PATCH] ARM: 2791/1: Add CRCs for aliased ARM symbols
Patch from Todd Poynor

Fix module versioning for 3 ARM symbols that do not have CRCs added,
avoid "disagrees about version of symbol struct_module" errors at module
load time.  From David Singleton.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-06 23:06:05 +01:00
Russell King
f9bd6ea446 [PATCH] ARM: Change 'param_offset' to 'boot_params'
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-04 10:43:36 +01:00
Russell King
c77b042700 [PATCH] ARM: Make the magic values in head.S more obvious
Make the magic address values in head.S more obvious as to where
they came from.  Wrap all debug code in CONFIG_DEBUG_LL.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-01 11:56:55 +01:00
Russell King
cfb0810eab [PATCH] ARM: Don't try to send a signal to pid0
If we receive an unrecognised abort during boot, don't try to
send a signal to pid0, but instead report the current state.
This leads to less confusing debug reports.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-30 11:06:49 +01:00
Nicolas Pitre
c7e7887666 [PATCH] ARM: 2723/2: remove __udivdi3 and __umoddi3 from the kernel
Patch from Nicolas Pitre

Those are big, slow and generally not recommended for kernel code.
They are even not present on i386.  So it should be concluded that
one could as well get away with do_div() alone.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29 18:10:54 +01:00
Catalin Marinas
aaaa3f9e51 [PATCH] ARM: 2769/1: cpu_init() stack setup fix
Patch from Catalin Marinas

The compiler allocates r14 for the stk variable in the __asm__ directive.
This is a shadowed register and gets changed when the mode is changed,
causing random values in the SP register. The patch adds a clobber for
the r14 register.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29 15:34:39 +01:00
Russell King
4b0ef3b112 [PATCH] ARM SMP: Add IPI support code for SMP TLB flushing
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-28 13:49:16 +01:00
Russell King
2ea83398b7 [PATCH] ARM: Add VST idle loop call
This call allows the dynamic tick support to reprogram the timer
immediately before the CPU idles.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-27 14:04:05 +01:00
Andrew Morton
bdb94f3a78 [PATCH] arm: swsusp build fix
Another swsusp fixup.

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-26 08:43:19 -07:00
Russell King
8749af6821 [PATCH] ARM: Generic Dynamic Tick Timer support for ARM, take 4
This patch adds support for Dynamic Tick Timer for ARM. Dynamic Tick is
also known as VST (Variable Scheduling Timeouts).

Dynamic Tick has been in use in the OMAP tree since last October.  The
patch is not intrusive, and does not do anything unless CONFIG_NO_IDLE_HZ
is defined.  This patch has the following fixed based on comments from
RMK:
- Time is updated before calling interrupt handlers.
- Added new interrupt flag SA_TIMER to avoid duplicate timer interrupts
- Moved struct dyn_tick_timer to time.h until we at some point probably
  have an arch independent dyn-tick.h
- Cleaned up testing for DYN_TICK_ENABLED in irq.c

 I've cleaned up this patch to fix some remaining issues:
 - Call the timer tick handler with irqs disabled, as it would be from
   a normal interrupt
 - if we have a dyn_tick, we better implement all methods.
 - generic timer_dyn_reprogram() call, to be called before sleeping
 - added command line option - "dyntick=" to allow boot-time control
   of this feature
    -- rmk

Signed-off-by: Tony Lindgren
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-25 19:39:45 +01:00
Russell King
3a66941106 [PATCH] ARM: Ensure memory information is page aligned
Ensure that meminfo.bank[] array contains page-aligned start/size
information.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-22 21:43:10 +01:00
Russell King
e00d349e77 [PATCH] ARM: Move signal return code into vector page
Move the signal return code into the vector page instead of placing
it on the user mode stack, which will allow us to avoid flushing
the instruction cache on signals, as well as eventually allowing
non-exec stack.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-22 20:26:05 +01:00
Linus Torvalds
1d345dac1f Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2005-06-20 16:00:33 -07:00
Yani Ioannou
ff381d2223 [PATCH] Driver Core: arch: update device attribute callbacks
Signed-off-by: Yani Ioannou <yani.ioannou@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-20 15:15:32 -07:00
Russell King
34c8eacab6 [PATCH] ARM: Remove obsolete arch/arm/kernel/arch.c
This is not used anymore - RiscPC now contains the necessary
supporting code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 12:56:40 +01:00
Russell King
0908db22b1 [PATCH] ARM SMP: Messages about CPUs should be prefixed by CPU%u
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19 19:48:16 +01:00
Russell King
ea4423c3b6 Merge with ../linux-2.6-smp 2005-06-19 19:26:54 +01:00
Russell King
36c5ed23b9 [PATCH] ARM SMP: Fix PXA/SA11x0 suspend resume crash
We need to re-initialise the stack pointers for undefined, IRQ
and abort mode handlers whenever we resume.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19 18:39:33 +01:00
Russell King
e65f38ed0b [PATCH] ARM SMP: Add support for startup of secondary processors
Create a temporary page table to startup secondary processors.  This
page table must have a 1:1 virtual/physical mapping for the kernel
in addition to the standard mappings to ensure that the secondary
CPU can enable its MMU safely.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-18 09:33:31 +01:00
Russell King
5ab6091db0 Merge with ../linux-2.6-smp 2005-06-18 09:06:59 +01:00
Nicolas Pitre
dcef1f6346 [PATCH] ARM: 2664/2: add support for atomic ops on pre-ARMv6 SMP systems
Patch from Nicolas Pitre

Not that there might be many of them on the planet, but at least RMK
apparently has one.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-08 19:00:47 +01:00
Russell King
ccea7a19e5 [PATCH] ARM SMP: Fix vector entry
The current vector entry system does not allow for SMP.  In
order to work around this, we need to eliminate our reliance
on the fixed save areas, which breaks the way we enable
alignment traps.  This patch changes the way we handle the
save areas such that we can have one per CPU.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-31 22:22:32 +01:00
Russell King
49f680ea7b [PATCH] ARM SMP: convert alignment enable
The current vector entry system does not allow for SMP.  In
order to work around this, we need to eliminate our reliance
on the fixed save areas, which breaks the way we enable
alignment traps.  This patch makes the alignment trap enable
code independent of the way we handle the save areas.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-31 18:02:00 +01:00
Russell King
791be9b976 [PATCH] ARM SMP: add IPI support
Add support for inter-processor interrupts to the main IRQ
handling code.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21 18:16:44 +01:00
Russell King
706fdd9faa [PATCH] ARM SMP: reallocate main IRQ handler code registers
By changing r9 -> r8 and r8 to 'tsk' (r9) we are able to remove
one instruction from the preempt path.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21 18:15:45 +01:00
Russell King
187a51ad11 [PATCH] ARM SMP: consolidate main IRQ handler code
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21 18:14:44 +01:00
Nicolas Pitre
41e46d6ab0 [PATCH] ARM: 2665/1: kill warnings in entry-armv.S
Patch from Nicolas Pitre

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-05 23:24:45 +01:00
Nicolas Pitre
4b0e07a556 [PATCH] ARM: 2663/1: straightify TLS register emulation a bit more
Patch from Nicolas Pitre

This better express things, and should cover RMK's weird SMP toys.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-05 23:24:45 +01:00
Russell King
4f7a18124c [PATCH] ARM: Fix kernel stack offset calculations
Various places in the ARM kernel implicitly assumed that kernel
stacks are always 8K due to hard coded constants.  Replace these
constants with definitions.

Correct the allowable range of kernel stack pointer values within
the allocation.  Arrange for the entire kernel stack to be zeroed,
not just the upper 4K if CONFIG_DEBUG_STACK_USAGE is set.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-05 13:11:00 +01:00
Jesper Juhl
7ed20e1ad5 [PATCH] convert that currently tests _NSIG directly to use valid_signal()
Convert most of the current code that uses _NSIG directly to instead use
valid_signal().  This avoids gcc -W warnings and off-by-one errors.

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01 08:59:14 -07:00
Stephen Rothwell
7d87e14c23 [PATCH] consolidate sys_shmat
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01 08:59:12 -07:00
Nicolas Pitre
2d2669b629 [PATCH] ARM: 2651/3: kernel helpers for NPTL support
Patch from Nicolas Pitre

This patch entirely reworks the kernel assistance for NPTL on ARM.
In particular this provides an efficient way to retrieve the TLS
value and perform atomic operations without any instruction emulation
nor special system call.  This even allows for pre ARMv6 binaries to
be forward compatible with SMP systems without any penalty.
The problematic and performance critical operations are performed
through segment of kernel provided user code reachable from user space
at a fixed address in kernel memory.  Those fixed entry points are
within the vector page so we basically get it for free as no extra
memory page is required and nothing else may be mapped at that
location anyway.
This is different from (but doesn't preclude) a full blown VDSO
implementation, however a VDSO would prevent some assembly tricks with
constants that allows for efficient branching to those code segments.
And since those code segments only use a few cycles before returning to
user code, the overhead of a VDSO far call would add a significant
overhead to such minimalistic operations.
The ARM_NR_set_tls syscall also changed number.  This is done for two
reasons:
1) this patch changes the way the TLS value was previously meant to be
   retrieved, therefore we ensure whatever library using the old way
   gets fixed (they only exist in private tree at the moment since the
   NPTL work is still progressing).
2) the previous number was allocated in a range causing an undefined
   instruction trap on kernels not supporting that syscall and it was
   determined that allocating it in a range returning -ENOSYS would be
   much nicer for libraries trying to determine if the feature is
   present or not.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-04-29 22:08:33 +01:00
Russell King
bce495d865 [PATCH] ARM: make entry*.S includes more logical
Move common includes to entry-header, and file specific includes
to the relevant file.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:21:02 +01:00
Russell King
f4dc9a4cf2 [PATCH] ARM: Remove single-use user save/restore macros
Assembly macros are pointless if they're only used once.  Move
them inline.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:20:34 +01:00
Russell King
cf88b417f9 [PATCH] ARM: remove PT_TRACESYS
PT_TRACESYS is unused, remove it.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:20:12 +01:00
Russell King
acaca3c915 [PATCH] ARM: Remove SVC_MODE definition
SVC_MODE reflects the MODE_SVC definition in asm/ptrace.h.  Use
the asm/ptrace.h definition instead, and remove SVC_MODE.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:19:48 +01:00
Russell King
e0f9f4a622 [PATCH] ARM: Use __NR_SYSCALL_BASE and __ARM_NR_BASE in asm code
Don't define our own local constants, but use those already defined
in asm/unistd.h instead.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:19:24 +01:00
Russell King
925c8a1a8c [PATCH] ARM: pt_regs offsets
Generate pt_regs S_xx offsets from the structure itself instead
of #defining them.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:18:59 +01:00
Russell King
1ec42c0c97 [PATCH] ARM: Remove argument for disable_irq/enable_irq
Since we do not require a register for these operations, we can
remove this unnecessary argument.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:18:26 +01:00
Russell King
7933523dc7 [PATCH] ARM: remove some entry initialisation asm code
Convert the trivial vector entry initialisation code to C code.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:17:42 +01:00
Hugh Dickins
6119be0bba [PATCH] freepgt: arm FIRST_USER_ADDRESS PAGE_SIZE
ARM define FIRST_USER_ADDRESS as PAGE_SIZE (beyond the machine vectors when
they are mapped low), and use that definition in place of locally defined
MIN_MAP_ADDR.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-19 13:29:21 -07:00
Russell King
652a12ef98 [PATCH] ARM: showregs
Fix show_regs() to provide a backtrace.  Provide a new __show_regs()
function which implements the common subset of show_regs() and die().
Add prototypes to asm-arm/system.h

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-17 15:50:36 +01:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00