Commit Graph

1307 Commits

Author SHA1 Message Date
Ralf Baechle 4b3e975e4a [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores
The idle loop goes to sleep using the WAIT instruction if !need_resched().
This has is suffering from from a race condition that if if just after
need_resched has returned 0 an interrupt might set TIF_NEED_RESCHED but
we've just completed the test so go to sleep anyway.  This would be
trivial to fix by just disabling interrupts during that sequence as in:

        local_irq_disable();
        if (!need_resched())
                __asm__("wait");
        local_irq_enable();

but the processor architecture leaves it undefined if a processor calling
WAIT with interrupts disabled will ever restart its pipeline and indeed
some processors have made use of the freedom provided by the architecture
definition.  This has been resolved and the Config7.WII bit indicates that
the use of WAIT is safe on 24K, 24KE and 34K cores.  It also is safe on
74K starting revision 2.1.0 so enable the use of WAIT with interrupts
disabled for 74K based on a c0_prid of at least that.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Ralf Baechle 9349075a15 [MIPS] SMTC: Fix cut'n'paste bug in Kconfig.debug
This effectivly turned the SMTC_IDLE_HOOK_DEBUG debug option into a no-op.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Ralf Baechle f7c2778151 [MIPS] Change libgcc-style functions from lib-y to obj-y
Reported by Eugene Surovegin <ebs@ebshome.net>.

If only modules were users of these functions they did not get linked into
the kernel proper, so later module loads would fail as well.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Chris Dearman c3e838a2cb [MIPS] Fix timer/performance interrupt detection
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:11 +01:00
Ralf Baechle 6fb88ce04f [MIPS] AP/SP: Avoid triggering the 34K E125 performance issue
C0_status doesn't need to be initialized at this point anyway; the register
will be initialized later.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-06 16:17:10 +01:00
Ralf Baechle 8c976e3451 [MIPS] VSMP: Fix initialization ordering bug.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-04 15:53:16 +01:00
Alexey Dobriyan 5da44ad504 mips-jazz: correct flags for timer io resource
arch/mips/jazz/setup.c:55:4: error: Initializer entry defined twice

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-28 11:38:19 -07:00
Chris Dearman 8e15a0e35f [MIPS] Count timer interrupts correctly.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:34 +02:00
Ralf Baechle 3207cd5c4b [MIPS] EMMA2RH: Disable GEN_RTC, it can't possibly work.
Neither rtc_mips_get_time nor rtc_mips_set_time are being initialized by
the EMMA2RH setup code, so genrtc at best was a RTC dummy avoiding a few
error messages but not providing actual functionality.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:34 +02:00
Pavel Kiryukhin a76f3a417a [MIPS] use compat_siginfo in rt_sigframe_n32
Signed-off-by: Pavel Kiryukhin <vksavl@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Ralf Baechle c8eae71dc8 [MIPS] 20K: Handle WAIT related bugs according to errata information
We used to avoid the WAIT entirely on the 20K but really only need to do
this on early revs of the 20K.  Without this a 20K was a bit of a
power hog.  Well, in the lower power power hog category ;-)

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Ralf Baechle b0c10b9f4c [MIPS] AP/SP requires shadow registers, auto enable support.
Noticed by Chris Dearman (chris@mips.com).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Yoichi Yuasa b3a04a6d07 [MIPS] Fix pb1500 reg B access
au_readl() is correct here.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Yoichi Yuasa 08a4593682 [MIPS] Alchemy: Fix wrong cast
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Yoichi Yuasa e460b73c87 [MIPS] remove "support for" from system type entry
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Yoichi Yuasa 2ec0e59aff [MIPS] add io_map_base to pci_controller on Cobalt
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:33 +02:00
Ralf Baechle 3ca507920d [MIPS] __ucmpdi2 arguments are unsigned long long.
Reported by Eugene Surovegin <ebs@ebshome.net>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-26 19:57:32 +02:00
Ralf Baechle 3b1d4ed535 [MIPS] Don't drag a platform specific header into generic arch code.
For some platforms it's definitions may conflict.  So that's the one-liner.
The rest is 10 square kilometers of collateral damage fixup this include
used to paper over.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-20 22:27:10 +01:00
Chris Dearman 7b4f4ec210 [MIPS] Fix builds where MSC01E_xxx is undefined.
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
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
Chris Dearman b72c052622 [MIPS] Malta: Fix for SOCitSC based Maltas
And an attempt to tidy up the core/controller differences.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-14 18:25:14 +01:00
Atsushi Nemoto e10e0cc885 [MIPS] Fix IP27 build
IP27 does no longer have ZONE_DMA.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-11 18:20:55 +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
Chris Dearman cf75789953 [MIPS] SMTC: Fix build error caused by nonsense code.
Signed-off-by: Chris Dearman <chris@mips.com>
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
Ralf Baechle d3a509118a [MIPS] Atlas: Fix build.
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
Robert P. J. Day 490dcc4d30 [MIPS] Fix some minor typoes in arch/mips/Kconfig.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:33 +01:00
Ralf Baechle cc8f0b827f [MIPS] Remove prototype for deleted function qemu_handle_int
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
Thomas Bogendoerfer fbd5604d56 [MIPS] Make dma_map_sg handle sg elements which are longer than one page
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:32 +01:00
Thomas Bogendoerfer 22df5bc591 [MIPS] Fix VGA corruption on RM300C
... by setting DRAM config to 2MB (SNI always used that size). This also
fixes video dram size detection in cirrusfb.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:31 +01:00
Thomas Bogendoerfer 0c2bf745f9 [MIPS] RM300: Fix MMIO problems by marking the PCI INT ACK region busy
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:31 +01:00
Sergei Shtylyov d73d420708 [MIPS] EMMA2RH: remove dead KGDB code
Get rid of the cross-arch KGDB specific code which shouldn't have been
there in the first place...

Signed-off-by: Sergey Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:31 +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
Ralf Baechle 79894c7b47 [MIPS] Atlas, Malta, SEAD: Remove scroll from interrupt handler.
Aside of being handy for debugging this has never been a particularly
good idea but is now getting in the way of dyntick / tickless kernels
and general cleanups.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-06-06 19:34:30 +01:00
Yoann Padioleau f834368564 parse errors in ifdefs
Fix various bits of obviously-busted code which we're not happening to
compile, due to ifdefs.

Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Jan Kara <jack@ucw.cz>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-01 08:18:28 -07:00
Ralf Baechle e971290133 meth driver renovation
The meth ethernet driver for the SGI IP32 aka O2 is so far still an old
style driver which does not use the device driver model.  This is now
causing issues with some udev based gadgetry in debian-stable.  Fixed by
converting the meth driver to a platform device.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

--
Fixes since previous patch:

  o Fixed typo in meth_exit_module()
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-24 17:20:49 -04:00
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
Linus Torvalds 0c4ea957c6 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-ip22
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-ip22:
  Convert SGI IP22 and specific drivers to platform_device.
2007-05-11 10:00:50 -07:00
Ralf Baechle df9f54084f Convert SGI IP22 and specific drivers to platform_device.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 17:00:29 +01:00
Yoichi Yuasa 3f2d560e90 [MIPS] Rework cobalt_board_id
This patch has reworked cobalt_board_id.
The cobalt_board_id is read from PCI config register.
It should be in PCI routine.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-05-11 14:28:34 +01:00