Commit Graph

147 Commits

Author SHA1 Message Date
Ralf Baechle 85b0549602 [MIPS] Avoid duplicate do_syscall_trace calls on return from sigreturn.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-12-01 11:05:18 +00:00
Ralf Baechle 04a7052c83 [MIPS] Fix register handling in syscalls when debugging.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-12-01 11:05:17 +00:00
Ralf Baechle edcb98d1db [MIPS] Fix return path of sysmips(MIPS_ATOMIC_SET, ...)
The way we were doing things does no longer work on 2.6.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-12-01 11:05:15 +00:00
Daniel Jacobowitz 56ebd51bae [MIPS] Generate SIGILL again
The rdhwr emulation accidentally swallowed the SIGILL from most other
illegal instructions.  Make sure to return -EFAULT by default.
    
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-12-01 11:05:14 +00:00
Ralf Baechle 8b36612a23 [MIPS] R10000 and R12000 need to set MIPS_CPU_4K_CACHE ...
... because they have R4000-style caches.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-12-01 11:05:12 +00:00
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
Christoph Hellwig 7e4c54a2a4 [PATCH] remove ioctl32_handler_t
Some architectures define and use this type in their compat_ioctl code, but
all of them can easily use the identical ioctl_trans_handler_t type that is
defined in common code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 07:56:00 -08:00
Linus Torvalds 3f00d3e8fb Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2005-11-07 11:15:23 -08:00
Atsushi Nemoto 16cd395136 Fix return type of setup_frame variants
Since 2.6.13-rc1 setup_frame and its variants return int.  But some bits
were missed in the conversion.
    
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07 18:05:39 +00:00
Ralf Baechle 0d959c260e IRIX: Use schedule_timeout_interruptible.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07 18:05:39 +00:00
Ralf Baechle 307bd284c2 VPE loader janitoring
o Switch to dynamic major
 o Remove duplicate SHN_MIPS_SCOMMON definition
 o Coding style: remove typedefs.
 o Coding style: reorder to avoid the need for forward declarations
 o Use kzalloc.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07 18:05:36 +00:00
Ralf Baechle afc4841d8a Turn rtlx upside down.
o Coding style
 o Race condition on open
 o Switch to dynamic major
 o Header file cleanup
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07 18:05:33 +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
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
Eric W. Biederman a928972864 [PATCH] Don't uselessly export task_struct to userspace in core dumps
task_struct is an internal structure to the kernel with a lot of good
information, that is probably interesting in core dumps.  However there is
no way for user space to know what format that information is in making it
useless.

I grepped the GDB 6.3 source code and NT_TASKSTRUCT while defined is not
used anywhere else.  So I would be surprised if anyone notices it is
missing.

In addition exporting kernel pointers to all the interesting kernel data
structures sounds like the very definition of an information leak.  I
haven't a clue what someone with evil intentions could do with that
information, but in any attack against the kernel it looks like this is the
perfect tool for aiming that attack.

So since NT_TASKSTRUCT is useless as currently defined and is potentially
dangerous, let's just not export it.

(akpm: Daniel Jacobowitz <dan@debian.org> "would be amazed" if anything was
using NT_TASKSTRUCT).

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-30 17:37:18 -08:00
Hugh Dickins 404351e67a [PATCH] mm: mm_init set_mm_counters
How is anon_rss initialized?  In dup_mmap, and by mm_alloc's memset; but
that's not so good if an mm_counter_t is a special type.  And how is rss
initialized?  By set_mm_counter, all over the place.  Come on, we just need to
initialize them both at once by set_mm_counter in mm_init (which follows the
memcpy when forking).

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 21:40:38 -07:00
Ralf Baechle 030274ae03 Remove useless casts of kmalloc return values.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:50 +01:00
Andrew Isaacson 93ce2f524e Add support for SB1A CPU.
Signed-Off-By: Andy Isaacson <adi@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:46 +01:00
Andrew Isaacson d121ced21d Sibyte fixes
Fix typo in cpu_probe_sibyte.
    
Signed-Off-By: Andy Isaacson <adi@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:45 +01:00
Ralf Baechle f4c72cc737 Get 64-bit right in the kgdb stub.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:43 +01:00
Ralf Baechle 0d507d61cd Sys_lookup_dcookie arguments occupy 4 argument slots.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:43 +01:00
Ralf Baechle 12616ed202 FPU emulator garbage collection.
First argument of fpu_emulator_cop1Handler() was unused.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:43 +01:00
Ralf Baechle 178086c86a Don't print file name and line in die and die_if_kernel.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:42 +01:00
Ralf Baechle 9383292f17 Date: Fri Jan 14 03:03:23 2005 +0000
Locking cleanups.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:39 +01:00
Ralf Baechle ec917c2c1a Fixup a few lose ends in explicit support for MIPS R1/R2.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:37 +01:00
Ralf Baechle 101b3531a6 Protect manipulation of c0_status against preemption and multithreading.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:36 +01:00
Ralf Baechle 8afcb5d829 Detect 4KSD and treat it like 4KSc.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:36 +01:00
Ralf Baechle 57468af326 Define and initialize kdb_lock using DEFINE_SPINLOCK.
Convert kgdb_cpulock into a raw_spinlock_t.
    
SPIN_LOCK_UNLOCKED is deprecated and it's replacement DEFINE_SPINLOCK is
not suitable for arrays of spinlocks.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:35 +01:00
Ralf Baechle f8bb3af924 Make kgdb_wait static.
Nothing outside gdb-stub.c uses kgdb_wait, so change it's definition to
static.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:34 +01:00
Ralf Baechle 02cf211968 Cleanup the mess in cpu_cache_init.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:32 +01:00
Ralf Baechle c78cbf49c4 Support for MIPSsim, the cycle accurate MIPS simulator.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:30 +01:00
Ralf Baechle b288f13587 Switch Sibyte profiling driver to ->compat_ioctl
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:29 +01:00
Daniel Jacobowitz ea3d710fe5 Revise MIPS 64-bit ptrace interface
Change the N32 debugging ABI to something more sane, and add support
for o32 and n32 debuggers to trace n64 programs.
    
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:29 +01:00
Ralf Baechle 0bf0e3e279 Fix excessive signal latencies.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:23 +01:00
Ralf Baechle 5bcb9a58e6 Move genrtc.c's functions into <asm/rtc.h>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:15 +01:00
Ralf Baechle 340ee4b98c Virtual SMP support for the 34K.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:10 +01:00
Ralf Baechle d03d0a5775 MT bulletproofing.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:09 +01:00
Ralf Baechle e027802e98 Display presence of SmartMIPS, DSP and MT ASEs in /proc/cpuinfo.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:05 +01:00
Ralf Baechle 3bffe736d9 Delete old junk.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:04 +01:00
Ralf Baechle 28a7879d8c Spelling fix.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:03 +01:00
Ralf Baechle d9912d8784 Inlining will result in back-to-back mtc0 mfc0 instructions. Break the
hazard by using back_to_back_c0_hazard().

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:00 +01:00
Ralf Baechle 8d9c62675d sys is only used for native o32 ...
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:58 +01:00
Thiemo Seufer 075e7502d9 R4600 has 32 FPRs.
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:58 +01:00
Ralf Baechle ae1b3d51c8 Make sure that the processor is actually online or die spectacularly.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:55 +01:00
Ralf Baechle 1d40cfcd34 Avoid SMP cacheflushes. This is a minor optimization of startup but
will also avoid smp_call_function from doing stupid things when called
from a CPU that is not yet marked online.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:54 +01:00
Pete Popov bdf21b18b4 Philips PNX8550 support: MIPS32-like core with 2 Trimedias on it.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:54 +01:00
Ralf Baechle e01402b115 More AP / SP bits for the 34K, the Malta bits and things. Still wants
a little polishing.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:53 +01:00
Ralf Baechle 7e35952baa Move Origin crapola into a machine-specific header file.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:52 +01:00
Ralf Baechle a0c3a5b5a8 Prevent gcc from optimizing a few functions away completly.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:52 +01:00