Commit Graph

586 Commits

Author SHA1 Message Date
Chris Dearman
ffe9ee4709 [MIPS] Separate performance counter interrupts
Support for performance counter overflow interrupt that is on a separate
interrupt from the timer.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-14 18:25:15 +01:00
Ralf Baechle
4ebd5233f0 [MIPS] Fix modpost warnings by making start_secondary __cpuinit
WARNING: arch/mips/kernel/built-in.o(.text+0x9a58): Section mismatch: reference to .init.text:cpu_report (between 'start_secondary' and 'smp_prepare_boot_cpu')
WARNING: arch/mips/kernel/built-in.o(.text+0x9a60): Section mismatch: reference to .init.text:per_cpu_trap_init (between 'start_secondary' and 'smp_prepare_boot_cpu')
WARNING: arch/mips/kernel/built-in.o(.text+0x9adc): Section mismatch: reference to .init.text:cpu_probe (between 'start_secondary' and 'smp_prepare_boot_cpu')
mipsel-linux-objcopy -S -O srec --remove-section=.reginfo --remove-section=.mdebug --remove-section=.comment --remove-section=.note --remove-section=.pdr --remove-section=.options --remove-section=.MIPS.options vmlinux arch/mips/boot/vmlinux.srec

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:54 +01:00
Ralf Baechle
6a05888d71 [MIPS] SMTC: The MT ASE requires to initialize c0_pagemask and c0_wired.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:54 +01:00
Ralf Baechle
8e8a52ed87 [MIPS] SMTC: Don't continue in set_vi_srs_handler on detected bad arguments.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:54 +01:00
Ralf Baechle
ef36fc3c5b [MIPS] SMTC: Fix warning.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:53 +01:00
Atsushi Nemoto
7a6d4f3874 [MIPS] Wire up utimensat, signalfd, timerfd, eventfd
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:53 +01:00
Chris Dearman
acaec427bc [MIPS] Always install the DSP exception handler.
Some non-DSP enabled cores 24K / 34K can generate a DSP exception where they
are actually expected to produce a reserved instruction exception.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:53 +01:00
Ralf Baechle
da9bc7263d [MIPS] SMTC: Don't set and restore irqregs ptr from self_ipi.
This did corrupt register s0 which the caller of self_ipi expects to
be unchanged.  This is a kernel bug which will only be triggered with
the compilers which compile __smtc_ipi_replay to use s0 across the
invocation of self_ipi. Gcc 4.1.2 does this, for example.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:53 +01:00
Atsushi Nemoto
6ba07e590d [MIPS] Fix warning by moving do_default_vi into CONFIG_CPU_MIPSR2_SRS
This fixes the warning:

arch/mips/kernel/traps.c:931: warning: 'do_default_vi' defined but not used

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:33 +01:00
Atsushi Nemoto
8676d2e024 [MIPS] Fix some system calls with long long arguments
* O32 fadvise64() pass long long arguments by register pairs.  Add
  sys32 version for 64 bit kernel.
* N32 readahead() can pass a long long argument by one register.  No
  need to use sys32_readahead.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:32 +01:00
Chris Dearman
f9509c84d8 [MIPS] Remove duplicate fpu enable hazard code.
Use common code from hazards.h instead.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:31 +01:00
Linus Torvalds
080e89270a Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fix
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fix:
  mm/slab: fix section mismatch warning
  mm: fix section mismatch warnings
  init/main: use __init_refok to fix section mismatch
  kbuild: introduce __init_refok/__initdata_refok to supress section mismatch warnings
  all-archs: consolidate .data section definition in asm-generic
  all-archs: consolidate .text section definition in asm-generic
  kbuild: add "Section mismatch" warning whitelist for powerpc
  kbuild: make better section mismatch reports on i386, arm and mips
  kbuild: make modpost section warnings clearer
  kconfig: search harder for curses library in check-lxdialog.sh
  kbuild: include limits.h in sumversion.c for PATH_MAX
  powerpc: Fix the MODALIAS generation in modpost for of devices
2007-05-21 12:03:04 -07:00
Alexey Dobriyan
e8edc6e03a Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.

This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
   getting them indirectly

Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
   they don't need sched.h
b) sched.h stops being dependency for significant number of files:
   on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
   after patch it's only 3744 (-8.3%).

Cross-compile tested on

	all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
	alpha alpha-up
	arm
	i386 i386-up i386-defconfig i386-allnoconfig
	ia64 ia64-up
	m68k
	mips
	parisc parisc-up
	powerpc powerpc-up
	s390 s390-up
	sparc sparc-up
	sparc64 sparc64-up
	um-x86_64
	x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig

as well as my two usual configs.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-21 09:18:19 -07:00
Sam Ravnborg
ca967258b6 all-archs: consolidate .data section definition in asm-generic
With this consolidation we can now modify the .data
section definition in one spot for all archs.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-05-19 09:11:57 +02:00
Sam Ravnborg
7664709b44 all-archs: consolidate .text section definition in asm-generic
Move definition of .text section to asm-generic.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-05-19 09:11:57 +02:00
Atsushi Nemoto
f543110da7 [MIPS] Drop __devinit tag from allocate_irqno() and free_irqno()
This fix these warnings:

WARNING: arch/mips/kernel/built-in.o - Section mismatch: reference to .init.text:free_irqno from __ksymtab_gpl between '__ksymtab_free_irqno' (at offset 0x0) and '__ksymtab_allocate_irqno'
WARNING: arch/mips/kernel/built-in.o - Section mismatch: reference to .init.text:allocate_irqno from __ksymtab_gpl after '__ksymtab_allocate_irqno' (at offset 0x8)

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:31 +01:00
Franck Bui-Huu
55d0b4e3f6 [MIPS] clocksource: use CLOCKSOURCE_MASK() macro
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:31 +01:00
Chris Dearman
d725cf3818 [MIPS] MT: Reenable EIC support and add support for SOCit SC.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:31 +01:00
Ralf Baechle
ef300e4223 [MIPS] Define and use vi_handler_t for vectored interrupt handlers.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:30 +01:00
Ralf Baechle
856a514b40 [MIPS] Fix do_default_vi to use get_irq_regs to get the irq register ptr.
Harmless bug because this function is only called in case of another
kernel bug anyway which is also why this was missed for so long.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:30 +01:00
Ralf Baechle
99af900aef [MIPS] Make do_default_vi static
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:30 +01:00
Franck Bui-Huu
36ea1d57a4 [MIPS] early_printk: allow the early console to run earlier
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:30 +01:00
Franck Bui-Huu
ca4437d4a5 [MIPS] early_printk: use init section
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:30 +01:00
Roman Zippel
f7e4217b00 rename thread_info to stack
This finally renames the thread_info field in task structure to stack, so that
the assumptions about this field are gone and archs have more freedom about
placing the thread_info structure.

Nonbroken archs which have a proper thread pointer can do the access to both
current thread and task structure via a single pointer.

It'll allow for a few more cleanups of the fork code, from which e.g.  ia64
could benefit.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
[akpm@linux-foundation.org: build fix]
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ian Molton <spyro@f2s.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Richard Curnow <rc@rc0.org.uk>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
Cc: Andi Kleen <ak@muc.de>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09 12:30:56 -07:00
Roman Zippel
c9f4f06d31 wrap access to thread_info
Recently a few direct accesses to the thread_info in the task structure snuck
back, so this wraps them with the appropriate wrapper.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09 12:30:56 -07:00
Randy Dunlap
e63340ae6b header cleaning: don't include smp_lock.h when not used
Remove includes of <linux/smp_lock.h> where it is not used/needed.
Suggested by Al Viro.

Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc,
sparc64, and arm (all 59 defconfigs).

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:07 -07:00
Gerd Hoffmann
69331af79c Fixes and cleanups for earlyprintk aka boot console
The console subsystem already has an idea of a boot console, using the
CON_BOOT flag.  The implementation has some flaws though.  The major
problem is that presence of a boot console makes register_console() ignore
any other console devices (unless explicitly specified on the kernel
command line).

This patch fixes the console selection code to *not* consider a boot
console a full-featured one, so the first non-boot console registering will
become the default console instead.  This way the unregister call for the
boot console in the register_console() function actually triggers and the
handover from the boot console to the real console device works smoothly.
Added a printk for the handover, so you know which console device the
output goes to when the boot console stops printing messages.

The disable_early_printk() call is obsolete with that patch, explicitly
disabling the early console isn't needed any more as it works automagically
with that patch.

I've walked through the tree, dropped all disable_early_printk() instances
found below arch/ and tagged the consoles with CON_BOOT if needed.  The
code is tested on x86, sh (thanks to Paul) and mips (thanks to Ralf).

Changes to last version: Rediffed against -rc3, adapted to mips cleanups by
Ralf, fixed "udbg-immortal" cmd line arg on powerpc.

Signed-off-by: Gerd Hoffmann <kraxel@exsuse.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:04 -07:00
Christoph Hellwig
ab1b6f03a1 simplify the stacktrace code
Simplify the stacktrace code:

 - remove the unused task argument to save_stack_trace, it's always
   current
 - remove the all_contexts flag, it's alwasy 0

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Andi Kleen <ak@suse.de>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:14:58 -07:00
Jeremy Fitzhardinge
b6e3590f81 [PATCH] x86: Allow percpu variables to be page-aligned
Let's allow page-alignment in general for per-cpu data (wanted by Xen, and
Ingo suggested KVM as well).

Because larger alignments can use more room, we increase the max per-cpu
memory to 64k rather than 32k: it's getting a little tight.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2007-05-02 19:27:12 +02:00
Ralf Baechle
05bc284a71 [MIPS] Remove unused _THREAD_SIZE_ORDER from asm-offset.c.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-27 16:20:25 +01:00
Thomas Bogendoerfer
639702bd72 [MIPS] Register PCI host bridge resource earlier
PCI based SNI RM machines have their EISA bus behind an Intel PCI/EISA
bridge. So the PCI IO range must start at 0x0000. Changing that will
break the PCI bus, because i8259.c already has registered it's IO
addresses before the PCI bus gets initialized. Below is a patch,
which will register the PCI host bridge resources inside
register_pci_controller(). It also changes i8259.c to use insert_region(),
because request_resource() will fail, if the IO space of the PIT hanging
of the PCI host bridge (maybe passing the resource parent to
init_i8259_irqs() is a cleaner fix for that).

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-27 16:20:25 +01:00
Ralf Baechle
7f5a7716dc [MIPS] Fix AP/SP to work in the reality of modern kernels.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-27 16:20:23 +01:00
Atsushi Nemoto
ba755f8ec8 [MIPS] Fix BUG(), BUG_ON() handling
With commit 63dc68a8cf, kernel can not
handle BUG() and BUG_ON() properly since get_user() returns false for
kernel code.  Use __get_user() to skip unnecessary access_ok().  This
patch also make BRK_BUG code encoded in the TNE instruction.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-20 14:58:37 +01:00
Atsushi Nemoto
faea623464 [MIPS] Retry {save,restore}_fp_context if failed in atomic context.
The save_fp_context()/restore_fp_context() might sleep on accessing
user stack and therefore might lose FPU ownership in middle of them.

If these function failed due to "in_atomic" test in do_page_fault,
touch the sigcontext area in non-atomic context and retry these
save/restore operation.

This is a replacement of a (broken) fix which was titled "Allow CpU
exception in kernel partially".

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-20 14:58:37 +01:00
Atsushi Nemoto
5323180db7 [MIPS] Disallow CpU exception in kernel again.
The commit 4d40bff7110e9e1a97ff8c01bdd6350e9867cc10 ("Allow CpU
exception in kernel partially") was broken.  The commit was to fix
theoretical problem but broke usual case.  Revert it for now.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-20 14:58:37 +01:00
Ralf Baechle
8a1e97ee2e [MIPS] SMTC: Fix recursion in instant IPI replay code.
local_irq_restore -> raw_local_irq_restore -> irq_restore_epilog ->
	smtc_ipi_replay -> smtc_ipi_dq -> spin_unlock_irqrestore ->
	_spin_unlock_irqrestore -> local_irq_restore

The recursion does abort when there is no more IPI queued for a CPU, so
this isn't usually fatal which is why we got away with this for so long
until this was discovered by code inspection.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-29 23:46:36 +01:00
Ralf Baechle
20bb25d10f [MIPS] SMTC: Fix false trigger of debug code on single VPE.
Make smtc_setup_irq() update the list of interrupts which need to be
watched by the debug code itself.  Also there is no need to initialize the
IPI swint when running with a single VPE, so don't initialize it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-29 23:46:36 +01:00
Ralf Baechle
ae036b7908 [MIPS] SMTC: irq_{enter,leave} and kstats keeping for relayed timer ints.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-29 23:46:35 +01:00
Chris Dearman
fe99f1b184 [MIPS] lockdep: Deal with interrupt disable hazard in TRACE_IRQFLAGS
Between the mtc0 or di instruction that disables interrupts and the
following hazard barrier a processor may still take interrupts.  If an
interrupt is taken after interrupts are disabled but before the state
is updated it will appear to restore_all that it is incorrectly returning
with interrupts disabled.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-29 23:46:35 +01:00
Chris Dearman
cbde5ebc97 [MIPS] lockdep: Handle interrupts in R3000 style c0_status register.
Check the IEP bit for R3000 style processors when checking to see if
interrupts will be reenabled in restore_all.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-29 23:46:35 +01:00
Ralf Baechle
7df4246117 [MIPS] Export except_vec_vi_{mori,lui,ori} as text symbols.
Otherwise objdump will screw up disassembly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-19 20:22:44 +00:00
Ralf Baechle
8c3644350f [MIPS] VI: TRACE_IRQS_OFF clobbers $v0, so save & restore around call.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-19 20:22:43 +00:00
Ralf Baechle
46230aa6ea [MIPS] RTLX: Handle copy_*_user return values.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:29 +00:00
Ralf Baechle
bc4809e939 [MIPS] RTLX: Protect rtlx_{read,write} with mutex.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:28 +00:00
Ralf Baechle
61dcc6f4d9 [MIPS] RTLX: Harden against compiler reordering and optimization.
RTLX communication is based on lock-free shared memory buffers.  It
happened to be working by luck so far but relies on the optimizer doing
certain optimizations but no reordering.

Fixed by inserting proper barriers in rtlx_read and rtlx_write, and careful
pointer dereferencing.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:27 +00:00
Ralf Baechle
9e34682026 [MIPS] RTLX: Don't use volatile; it's fragile.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:27 +00:00
Ralf Baechle
65f8ebe063 [MIPS] Compat: Fix build if CONFIG_SYSVIPC is disabled.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:26 +00:00
Atsushi Nemoto
53dc80287d [MIPS] FPU ownership management & preemption fixes
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:26 +00:00
Atsushi Nemoto
c6a2f46793 [MIPS] Check FCSR for pending interrupts, alternative version
Commit 6d6671066a is incomplete and misses
non-r4k CPUs.  This patch reverts the commit and fixes in other way.

 o Do FCSR checking in caller of restore_fp_context.
 o Send SIGFPE if the signal handler set any FPU exception bits.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:25 +00:00
Ralf Baechle
0e6ee854e7 [MIPS] kspd: ioctl needs a translation entry.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-13 16:59:31 +00:00
Davide Libenzi
f6dfb4fd7d [PATCH] Add epoll compat_ code to fs/compat.c
IA64 and ARM-OABI are currently using their own version of epoll compat_
code.

An architecture needs epoll_event translation if alignof(u64) in 32 bit
mode is different from alignof(u64) in 64 bit mode.  If an architecture
needs epoll_event translation, it must define struct compat_epoll_event in
asm/compat.h and set CONFIG_HAVE_COMPAT_EPOLL_EVENT and use
compat_sys_epoll_ctl and compat_sys_epoll_wait.

All 64 bit architecture should use compat_sys_epoll_pwait.

[sfr: restructure and move to fs/compat.c, remove MIPS version
of compat_sys_epoll_pwait, use __put_user_unaligned]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-08 07:38:22 -08:00
Ralf Baechle
08253b39f8 [MIPS] Wire up ioprio_set and ioprio_get.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-07 00:07:18 +00:00
Ralf Baechle
d0c91ae2bb [MIPS] Export __copy_user_inatomic.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-07 00:07:17 +00:00
Ralf Baechle
36a885306f [MIPS] Fix and cleanup the mess that a dozen prom_printf variants are.
early_printk is a so much saner thing.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-04 19:02:37 +00:00
Ralf Baechle
821d313c25 [MIPS] Replace sys32_timer_create with the generic compat_sys_timer_create.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-04 19:02:30 +00:00
Ralf Baechle
08274cefdc [MIPS] Replace sys32_socketcall with the generic compat_sys_socketcall.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-04 19:02:30 +00:00
Ralf Baechle
440537ef40 [MIPS] N32 waitid is the same as o32.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-04 19:02:29 +00:00
Ralf Baechle
c68644d330 [MIPS] Make SMTC_IDLE_HOOK_DEBUG a proper option in Kconfig.debug.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:06 +00:00
Ralf Baechle
e016c38d18 [MIPS] Fix foobar in wiring up compat_sys_epoll_pwait syscall.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:06 +00:00
Ralf Baechle
b772e6d272 [MIPS] Always fixup unaligned accesses in kernel mode.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:06 +00:00
Ralf Baechle
3dac2561e2 [MIPS] RTLX: Delete multiple definition of ret shaddowing each other.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:06 +00:00
Ralf Baechle
c4c4018b04 [MIPS] RTLX, VPE: Make open actually atomic.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:06 +00:00
Atsushi Nemoto
d2af363cfb [MIPS] Kill redundant EXTRA_AFLAGS
Many Makefiles in arch/mips have EXTRA_AFLAGS := $(CFLAGS) line.  This
is redundant while AFLAGS contains $(cflags-y) and any options only
listed in CFLAGS (not in cflags-y) should be unnecessary for asm
sources.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:05 +00:00
Ralf Baechle
67e2cccec6 [MIPS] RTLX: Handle signals when sleeping.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:05 +00:00
Ralf Baechle
de7fa296b6 [MIPS] SMP: Get smp_tune_scheduling to do something useful.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-22 00:50:45 +00:00
Franck Bui-Huu
9693a85378 [MIPS] Add basic SMARTMIPS ASE support
This patch adds trivial support for SMARTMIPS extension. This extension
is currently implemented by 4KS[CD] CPUs.

Basically it saves/restores ACX register, which is part of the SMARTMIPS
ASE, when needed. This patch does *not* add any support for Smartmips MMU
features.

Futhermore this patch does not add explicit support for 4KS[CD] CPUs since
they are respectively mips32 and mips32r2 compliant.  So with the current
processor configuration, a platform that has such CPUs needs to select
both configs:

	CPU_HAS_SMARTMIPS
	SYS_HAS_CPU_MIPS32_R[12]

This is due to the processor configuration which is mixing up all the
architecture variants and the processor types.

The drawback of this, is that we currently pass '-march=mips32' option to
gcc when building a kernel instead of '-march=4ksc' for 4KSC case. This
can lead to a kernel image a little bit bigger than required.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-22 00:50:44 +00:00
Linus Torvalds
d7f786e065 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [NET] Eliminate user-selectable CONFIG_MV643XX_ETH_[012]
  [MIPS] Drop __init from init_8259A()
  [MIPS] Fix Kconfig typo bug
  [MIPS] Fix double signal on trap and break instruction
  [MIPS] sigset_32 has been made redundand by compat_sigset_t.
  [MIPS] emma2rh: Remove needless <asm/i8259.h> inclusion.
  [MIPS] Add MTD device support for Cobalt
2007-02-20 10:14:29 -08:00
Atsushi Nemoto
a0be2f7999 [MIPS] Drop __init from init_8259A()
init_8259A() is called from i8259A_resume() so should not be marked as
__init.  And add some tests for whether 8259A was already initialized
or not.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-20 17:11:55 +00:00
Atsushi Nemoto
90fccb1363 [MIPS] Fix double signal on trap and break instruction
This commit broke gdb, since any BREAK or TRAP instruction cause SIGSEGV.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-20 17:11:55 +00:00
Ralf Baechle
01ee603708 [MIPS] sigset_32 has been made redundand by compat_sigset_t.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-20 17:11:55 +00:00
Atsushi Nemoto
f49a747c4a [MIPS] Make some __setup functions static
This fixes some sparse warnings. ("warning: symbol 'foo' was not
declared. Should it be static?")

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-20 01:26:41 +00:00
Linus Torvalds
cb553c4800 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Update defconfigs
  [MIPS] Support for several more SNI RM models.
  [MIPS] Include <asm/bugs> to for declaration of check_bugs32.
  [MIPS] Add external declaration of pagetable_init() to pgalloc.h
  [MIPS] Make kernel_thread_helper() static
  [MIPS] Make __declare_dbe_table static and avoid it getting optimized away
  [MIPS] Use MIPS R2 instructions for bitops.
  [MIPS] signals: Share even more code.
  [MIPS] Fix CONFIG_MIPS32_N32=y CONFIG_MIPS32_O32=n build
  [MIPS] Iomap implementation.
  [MIPS] <asm/compat-signal.h> needs to include <asm/uaccess.h>.
  [MIPS] IP27: Fix warning.
  [MIPS] Fix sigset_t endianess swapping issues in 32-bit compat code.
2007-02-19 13:38:42 -08:00
Ralf Baechle
5759906ca9 [MIPS] Include <asm/bugs> to for declaration of check_bugs32.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-18 21:31:36 +00:00
Atsushi Nemoto
db0b937daf [MIPS] Make kernel_thread_helper() static
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-18 21:31:36 +00:00
Ralf Baechle
b6dcec9ba4 [MIPS] Make __declare_dbe_table static and avoid it getting optimized away
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-18 21:31:36 +00:00
Ralf Baechle
151fd6acd9 [MIPS] signals: Share even more code.
native and compat do_signal and handle_signal are identical and can easily
be unified.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-18 21:31:35 +00:00
Ralf Baechle
38201fb23c [MIPS] Fix CONFIG_MIPS32_N32=y CONFIG_MIPS32_O32=n build
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-18 21:31:34 +00:00
Atsushi Nemoto
755f21bb89 [MIPS] Fix sigset_t endianess swapping issues in 32-bit compat code.
access_ok in compat-signal.h is wrong (checking destination instead of
source) and redundant (already checked before calling this function).

Also sf_mask in struct sigframe32 should be compat_sigset_t type.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-18 21:31:33 +00:00
Tobias Klauser
c5a69d57eb Storage class should be before const qualifier
The C99 specification states in section 6.11.5:

The placement of a storage-class specifier other than at the
beginning of the declaration specifiers in a declaration is an
obsolescent feature.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2007-02-17 20:11:19 +01:00
Thomas Gleixner
877fe38029 [PATCH] clocksource: fixup is_continous changes on MIPS
Fixup the is_contionous replacement by a flag field.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-16 08:13:57 -08:00
Linus Torvalds
463020ce42 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Fix sigset_t endianess swapping issues in 32-bit compat code.
  [MIPS] Fix uniprocessor Sibyte builds.
  [MIPS] Make entry.S a little more readable.
  [MIPS] Remove stray instruction from __get_user_asm_ll32.
  [MIPS] 32-bit: Fix warning about cast for fetching pointer from userspace.
  [MIPS] DECstation: Fix irq handling
  [MIPS] signals: make common _BLOCKABLE macro
  [MIPS] signal: Move sigframe definition for native O32/N64 into signal.c
  [MIPS] signal: Move {restore,setup}_sigcontext prototypes to their user
  [MIPS] signal: Fix warnings in o32 compat code.
  [MIPS] IP27: Enable N32 support in defconfig.
  Revert "[MIPS] Fix warning in get_user when fetching pointer object from userspace."
  [MIPS] Don't claim we support dma_declare_coherent_memory - we don't.
  [MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}
  [MIPS] Improve branch prediction in ll/sc atomic operations.
2007-02-13 16:12:23 -08:00
Ralf Baechle
431dc80403 [MIPS] Fix sigset_t endianess swapping issues in 32-bit compat code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-13 22:40:51 +00:00
Franck Bui-Huu
7da8a581f5 [MIPS] Make entry.S a little more readable.
When CONFIG_PREEMPT is not set, it also moves one branch instruction from
ret_from_irq() to ret_from_exception().  Therefore we favour the return
from irq case which should be more common than the other one.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-13 22:40:51 +00:00
Franck Bui-Huu
24c556e99e [MIPS] signals: make common _BLOCKABLE macro
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-13 22:40:51 +00:00
Ralf Baechle
6668058346 [MIPS] signal: Move sigframe definition for native O32/N64 into signal.c
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-13 22:40:50 +00:00
Ralf Baechle
205d84aaea [MIPS] signal: Move {restore,setup}_sigcontext prototypes to their user
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-13 22:40:50 +00:00
Ralf Baechle
dd02f06aa9 [MIPS] signal: Fix warnings in o32 compat code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-13 22:40:50 +00:00
Arjan van de Ven
5dfe4c964a [PATCH] mark struct file_operations const 2
Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

[akpm@osdl.org: sparc64 fix]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:44 -08:00
Alon Bar-Lev
43cd34645d [PATCH] Dynamic kernel command-line: mips
Rename saved_command_line into boot_command_line.

Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:38 -08:00
Linus Torvalds
574009c1a8 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] signal: do not inline handle_signal()
  [MIPS] signal: do not use save_static_function() anymore
  [MIPS] signal32: no need to save c0_status register in setup_sigcontext32()
  [MIPS] signal32: reduce {setup,restore}_sigcontext32 sizes
  [MIPS] signal: factorize debug code
  [MIPS] signal: test return value of install_sigtramp()
  [MIPS] signal32: remove duplicate code
  [MIPS] signal: clean up sigframe structure
  [MIPS] signal: do not inline functions in signal-common.h
  [MIPS] signals: reduce {setup,restore}_sigcontext sizes
  [MIPS] Fix warning in get_user when fetching pointer object from userspace.
  [MIPS] Fix eth2 platform device id for jaguar_atx and ocelot_3 platforms
  [MIPS] JMR3927 and RBTX49x7 support little endian
  [MIPS] RBTX49x7: declare prom_getcmdline()
  [MIPS] RTLX: Sprinkle device model code into code to make udev happier.
  [MIPS] VPE: Sprinkle device model code into code to make udev happier.
2007-02-11 11:40:04 -08:00
Kyle McMartin
d4d23add3a [PATCH] Common compat_sys_sysinfo
I noticed that almost all architectures implemented exactly the same
sys32_sysinfo...  except parisc, where a bug was to be found in handling of
the uptime.  So let's remove a whole whack of code for fun and profit.
Cribbed compat_sys_sysinfo from x86_64's implementation, since I figured it
would be the best tested.

This patch incorporates Arnd's suggestion of not using set_fs/get_fs, but
instead extracting out the common code from sys_sysinfo.

Cc: Christoph Hellwig <hch@infradead.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:32 -08:00
Alexey Dobriyan
b035b6de24 [PATCH] Consolidate default sched_clock()
Use attribute(weak).

Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:28 -08:00
Jean-Paul Saman
67d38229df [PATCH] disable init/initramfs.c: architectures
Update all arch/*/kernel/vmlinux.lds.S to not include space for initramfs
when CONFIG_BLK_DEV_INITRAMFS is not selected.  This saves another 4 kbytes
on most platfoms (some reserve PAGE_SIZE for initramfs).

Signed-off-by: Jean-Paul Saman <jean-paul.saman@nxp.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:25 -08:00
Franck Bui-Huu
e692eb30ff [MIPS] signal: do not inline handle_signal()
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-10 22:38:48 +00:00
Franck Bui-Huu
f90080a059 [MIPS] signal: do not use save_static_function() anymore
This macro was used to save static registers before calling
sys_sigsuspend() and sys_sigreturn().

For the sys_sigreturn() case, there's no point to save them
since they have been already saved by setup_sigcontext()
before calling the signal handler.

For the sys_sigsuspend() case, I don't see any reasons...

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-10 22:38:48 +00:00
Franck Bui-Huu
6bfe966160 [MIPS] signal32: no need to save c0_status register in setup_sigcontext32()
All the information in the MIPS c0_status register is priviledged.
Nothing that would constitute part of the thread context.

The one flag one could possibly argument about might be c0_status.fr
but none of the ABIs or tools or application software can make use
of it.

So for consistency with restore_sigcontext32(), which does not
restore c0_status register, this patch remove the saving part.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-10 22:38:47 +00:00
Franck Bui-Huu
9432a9ba96 [MIPS] signal32: reduce {setup,restore}_sigcontext32 sizes
This trivial changes should decrease a lot the size of these
2 functions.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-10 22:38:47 +00:00
Franck Bui-Huu
722bb63de6 [MIPS] signal: factorize debug code
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-10 22:38:46 +00:00
Franck Bui-Huu
601dde45f6 [MIPS] signal: test return value of install_sigtramp()
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-10 22:38:46 +00:00
Franck Bui-Huu
36a1f2c24f [MIPS] signal32: remove duplicate code
There's no point for signal32.c to redefine get_sigframe().
It should use the one define in signal.c instead.

The same stands for install_sigtramp().

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-10 22:38:46 +00:00