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* MIPS: Add -Werror to arch/mips/KbuildSam Ravnborg2010-08-05
| | | | | | | | | | | | | | | | | | | | | | | | | | Adding subdirs-ccflags-y := -Werror to arch/mips/Kbuild let us in one go cover all files with -Werror. In addition this allows us to remove the individual -Werror definition in various Makefile. Adding the definition to Kbuild as a recursive option help us not to forget to do so. With this change we now compile arch/mips/kernel/cpufreq with -Werror One drawback: When specifying a subdirectory covered by the Kbuild file like this: make arch/mips/kernel/ then kbuild fails to pick up the -Werror definition. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> To: linux-mips <linux-mips@linux-mips.org> To: Wu Zhangjin <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/1301/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Checkpatch cleanupAndrea Gelmini2010-08-05
| | | | | | | | | arch/mips/math-emu/sp_tlong.c:75: ERROR: else should follow close brace '}' Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1276/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Checkpatch cleanupAndrea Gelmini2010-08-05
| | | | | | | | | arch/mips/math-emu/sp_tint.c:76: ERROR: else should follow close brace '}' Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1275/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Checkpatch cleanupAndrea Gelmini2010-08-05
| | | | | | | | | arch/mips/math-emu/sp_modf.c:32: ERROR: "foo * bar" should be "foo *bar" Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1273/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Checkpatch cleanupAndrea Gelmini2010-08-05
| | | | | | | | | arch/mips/math-emu/dp_tlong.c:75: ERROR: else should follow close brace '}' Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1272/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Checkpatch cleanupAndrea Gelmini2010-08-05
| | | | | | | | | arch/mips/math-emu/dp_tint.c:73: ERROR: else should follow close brace '}' Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1271/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Checkpatch cleanupAndrea Gelmini2010-08-05
| | | | | | | | | arch/mips/math-emu/dp_modf.c:32: ERROR: "foo * bar" should be "foo *bar" Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1269/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Restore signalling NaN behaviour for abs.[sd]Chris Dearman2010-07-05
| | | | | | | | | | | Atsushi Nemoto <anemo@mba.ocn.ne.jp> spotted that this had been incorrectly removed in a previous patch Signed-off-by: Chris Dearman <chris@mips.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/1213/ Tested-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Coding style cleanups of access of FCSR rounding mode bitsShane McDonald2010-05-21
| | | | | | | | | | | | | | Replaces references to the magic number 0x3 with constants and macros indicating the real purpose of those bits. They are the rounding mode bits of the FCSR register. Signed-off-by: Shane McDonald <mcdonald.shane@gmail.com> To: anemo@mba.ocn.ne.jp To: kevink@paralogos.com To: linux-mips@linux-mips.org To: sshtylyov@mvista.com Patchwork: http://patchwork.linux-mips.org/patch/1206/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS FPU emulator: allow Cause bits of FCSR to be writeable by ctc1Shane McDonald2010-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the FPU emulator code of the MIPS, the Cause bits of the FCSR register are not currently writeable by the ctc1 instruction. In odd corner cases, this can cause problems. For example, a case existed where a divide-by-zero exception was generated by the FPU, and the signal handler attempted to restore the FPU registers to their state before the exception occurred. In this particular setup, writing the old value to the FCSR register would cause another divide-by-zero exception to occur immediately. The solution is to change the ctc1 instruction emulator code to allow the Cause bits of the FCSR register to be writeable. This is the behaviour of the hardware that the code is emulating. This problem was found by Shane McDonald, but the credit for the fix goes to Kevin Kissell. In Kevin's words: I submit that the bug is indeed in that ctc_op: case of the emulator. The Cause bits (17:12) are supposed to be writable by that instruction, but the CTC1 emulation won't let them be updated by the instruction. I think that actually if you just completely removed lines 387-388 [...] things would work a good deal better. At least, it would be a more accurate emulation of the architecturally defined FPU. If I wanted to be really, really pedantic (which I sometimes do), I'd also protect the reserved bits that aren't necessarily writable. Signed-off-by: Shane McDonald <mcdonald.shane@gmail.com> To: anemo@mba.ocn.ne.jp To: kevink@paralogos.com To: sshtylyov@mvista.com Patchwork: http://patchwork.linux-mips.org/patch/1205/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---
* MIPS: Nuke trailing blank linesRalf Baechle2010-02-27
| | | | | | | Recent git versions now warn about those and they've always been a bit of an annoyance. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Cleanup switches with cases that can be mergedRoel Kluin2010-02-27
| | | | | | | | | Signed-off-by: Roel Kluin <roel.kluin@gmail.com> To: linux-mips@linux-mips.org To: Andrew Morton <akpm@linux-foundation.org> To: LKML <linux-kernel@vger.kernel.org> Patchwork: http://patchwork.linux-mips.org/patch/860/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Collect FPU emulator statistics per-CPU.David Daney2009-12-16
| | | | | | | | | | | | | | | | | | | On SMP systems, the collection of statistics can cause cache line bouncing in the lines associated with the counters. Also there are races incrementing the counters on multiple CPUs. To fix both problems, we collect the statistics in per-CPU variables, and add them up in the debugfs read operation. As a test I ran the LTP float_bessel test on a 12 CPU Octeon system. Without CONFIG_DEBUG_FS : 2602 seconds. With CONFIG_DEBUG_FS: 2640 seconds. With non-cpu-local atomic statistics: 14569 seconds. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Merge branch 'for-next' into for-linusJiri Kosina2009-12-07
|\ | | | | | | | | | | Conflicts: kernel/irq/chip.c
| * tree-wide: fix assorted typos all over the placeAndré Goddard Rosa2009-12-04
| | | | | | | | | | | | | | | | | | | | That is "success", "unknown", "through", "performance", "[re|un]mapping" , "access", "default", "reasonable", "[con]currently", "temperature" , "channel", "[un]used", "application", "example","hierarchy", "therefore" , "[over|under]flow", "contiguous", "threshold", "enough" and others. Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | MIPS: Fix emulation of 64-bit FPU on FPU-less 64-bit CPUs.David Daney2009-11-13
|/ | | | | | | | | | | | | | | | Running a 64-bit kernel on a 64-bit CPU without an FPU would cause the emulator to run in 32-bit mode. The c0_Status.FR bit is wired to zero on systems without an FPU, so using that bit to decide how the emulator behaves doesn't allow for proper emulation on 64-bit FPU-less processors. Instead, we need to select the emulator mode based on the user-space ABI. Since the thread flag TIF_32BIT_REGS is used to set c0_Status.FR, we can just use it to decide if the emulator should be in 32-bit or 64-bit mode. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Fix abs.[sd] and neg.[sd] emulation for NaN operandsNigel Stephens2009-11-02
| | | | | | | This patch ensures that the sign bit is always updated for NaN operands. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Switch FPU emulator trap to BREAK instruction.Ralf Baechle2008-10-30
| | | | | | | | | | | | Arguably using the address error handler has always been ugly. But with processors that handle unaligned loads and stores in hardware the current mechanism ceases to work so switch it to a BREAK instruction and allocate break code 514 to the FPU emulator. Yoichi Yuasa provided a build fix for CONFIG_BUG=n. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
* MIPS: Fix debugfs_create_*'s error checking method for arch/mips/math-emu/Zhaolei2008-10-27
| | | | | | | | debugfs_create_*() returns NULL on error. Make its caller debugfs_fpuemu return -ENODEV on error. Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix missing prototypes in asm/fpu.hDmitri Vorobiev2008-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | While building the Malta defconfig, sparse spat the following warnings: >>>>>>>>>>>>>>>>>> arch/mips/math-emu/kernel_linkage.c:31:6: warning: symbol 'fpu_emulator_init_fpu' was not declared. Should it be static? arch/mips/math-emu/kernel_linkage.c:54:5: warning: symbol 'fpu_emulator_save_context' was not declared. Should it be static? arch/mips/math-emu/kernel_linkage.c:68:5: warning: symbol 'fpu_emulator_restore_context' was not declared. Should it be static? >>>>>>>>>>>>>>>>>> This patch fixes these errors by adding the proper prototypes to the include/asm-mips/fpu.h header, and actually using this header in the sparse-spotted source file. Build-tested with Malta defconfig. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.fi> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] replace __inline with inlineHarvey Harrison2008-04-28
| | | | | Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Compliment va_start() with va_end().Richard Knutsson2007-11-26
| | | | | Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] checkfiles: Fix "need space after that ','" errors.Ralf Baechle2007-10-11
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix "no space between function name and open parenthesis" warnings.Ralf Baechle2007-10-11
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Use -Werror on subdirectories which build cleanly.Ralf Baechle2007-07-31
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Add some __user tagsAtsushi Nemoto2007-07-13
| | | | | Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] math-emu minor cleanupAtsushi Nemoto2007-07-13
| | | | | | | | Declaring emulpc and contpc as "unsigned long" can get rid of some casts. This also get rid of some sparse warnings. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Add debugfs files to show fpuemu statisticsAtsushi Nemoto2007-07-10
| | | | | | | | | | | Export contents of struct mips_fpu_emulator_stats via debugfs. There is no way to read these statistics for now but they (at least the "emulated" count) might be sometimes useful for performance tuning on FPU-less CPUs. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* header cleaning: don't include smp_lock.h when not usedRandy Dunlap2007-05-08
| | | | | | | | | | | | 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>
* [MIPS] FPU ownership management & preemption fixesAtsushi Nemoto2007-03-16
| | | | | Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Make sure cpu_has_fpu is used only in atomic contextAtsushi Nemoto2006-10-09
| | | | | | | | Make sure cpu_has_fpu (which uses smp_processor_id()) is used only in atomic context. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [MIPS] Unify mips_fpu_soft_struct and mips_fpu_hard_structs.Atsushi Nemoto2006-06-19
| | | | | | | | | The struct mips_fpu_soft_struct and mips_fpu_hard_struct are completely same now and the kernel fpu emulator assumes that. This patch unifies them to mips_fpu_struct and get rid of mips_fpu_union. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix compiler warnings (field width, unused variable)Atsushi Nemoto2006-06-05
| | | | | | | | | | | | | | | | | Fix following warnings: linux/arch/mips/kernel/setup.c:432: warning: field width is not type int (arg 2) linux/arch/mips/kernel/setup.c:432: warning: field width is not type int (arg 4) linux/arch/mips/kernel/syscall.c:279: warning: unused variable `len' linux/arch/mips/kernel/syscall.c:280: warning: unused variable `name' linux/arch/mips/math-emu/dp_fint.c:32: warning: unused variable `xc' linux/arch/mips/math-emu/dp_flong.c:32: warning: unused variable `xc' linux/arch/mips/math-emu/sp_fint.c:32: warning: unused variable `xc' linux/arch/mips/math-emu/sp_flong.c:32: warning: unused variable `xc' (original patch by Atsushi, slight changes to the setup.c part by me.) Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] ieee754[sd]p_neg workaroundAtsushi Nemoto2006-02-07
| | | | | | | | | | It looks glibc's pow() assumes an unary '-' operation for any number (including NaNs) always inverts its sign bit (though IEEE754 does not specify the sign bit for NaNs). This patch make the kernel math-emu emulates real MIPS neg.[ds] instruction. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: FP: Remove silly trick to avoid warning.Ralf Baechle2006-01-10
| | | | | | Just doesn't fool a modern compiler anymore. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Get rid of SINGLE_ONLY_FPU. Linux does not support half FPU other thanRalf Baechle2005-10-29
| | | | | | by emulation of a full FPU. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Fix all the get_user / put_user related sparse warnings.Ralf Baechle2005-10-29
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Delete unused ieee754_cname[] and declaration.Ralf Baechle2005-10-29
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Include for prototypes.Ralf Baechle2005-10-29
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Protect against multiple inclusion.Ralf Baechle2005-10-29
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* FPU emulator garbage collection.Ralf Baechle2005-10-29
| | | | | | First argument of fpu_emulator_cop1Handler() was unused. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* GCC bulletproofing: __mips64 is only defined when compiling for 64-bitRalf Baechle2005-10-29
| | | | | | processors. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Now that a struct is the only member left in structRalf Baechle2005-10-29
| | | | | | mips_fpu_emulator_stats cleanup that unnecessary nesting of structs. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Get rid of the eir struct mips_fpu_emulator_private member. It'sRalf Baechle2005-10-29
| | | | | | | | | never initialized been initialized anywhere, just saved to and restored from signal frames so nonsense anyway. As neat side effect of being shared between all processors it was also abusable as a nice covert channel between processes. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Fix preemption and SMP problems in the FP emulator code.Ralf Baechle2005-10-29
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Gross macro abuse. Get rid of gpreg_t, vaddr_t, REG_TO_VA andRalf Baechle2005-10-29
| | | | | | | | VA_TO_REG. Who ever wrote this apparently did enjoy the C Puzzle Book. ISBN 0201604612, a little old but still fun reading for the next blackout ;) Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Cleanup fpuemuprivate declarations.Ralf Baechle2005-10-29
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [PATCH] mips: fix build warningsYoichi Yuasa2005-09-05
| | | | | | | | | | | | | | | | | | | This patch has fixed the following warnings. arch/mips/kernel/genex.S:250:5: warning: "CONFIG_64BIT" is not defined arch/mips/math-emu/cp1emu.c:1128:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:1206:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:1270:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:323:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:808:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:953:5: warning: "__mips64" is not defined arch/mips/mm/tlbex.c:519:5: warning: "CONFIG_64BIT" is not defined include/asm/reg.h:73:5: warning: "CONFIG_64BIT" is not defined Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mips: clean up 32/64-bit configurationRalf Baechle2005-09-05
| | | | | | | | Start cleaning 32-bit vs. 64-bit configuration. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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