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* MIPS: math-emu: Inline fpu_emulator_init_fpu()Ralf Baechle2014-05-231-42/+0
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Cleanup coding style.Ralf Baechle2014-05-231-1/+1
| | | | | | | | | | | | o Only define variables in the outermost block o One empty line at most o Format comments as per CodingStyle o Update FSF address in licensing term comment o Spell FPU and MIPS in all capitals. o Remove ####-type of lines in comments. o Try to make things a bit most consistent between sp_*.c / dp_*.c files. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: math-emu: Header file weeding.Ralf Baechle2014-05-211-5/+2
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Move & rename fpu_emulator_{save,restore}_contextPaul Burton2014-03-261-75/+0
| | | | | | | | | | | | | | These functions aren't directly related to the FPU emulator at all, they simply copy between a thread's saved context & a sigcontext. Thus move them to the appropriate signal files & rename them accordingly. This makes it clearer that the functions don't require the FPU emulator in any way. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Qais Yousef <qais.yousef@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6422/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Simplify FP context accessPaul Burton2014-03-261-9/+12
| | | | | | | | | | | | | | | | This patch replaces the fpureg_t typedef with a "union fpureg" enabling easier access to 32 & 64 bit values. This allows the access macros used in cp1emu.c to be simplified somewhat. It will also make it easier to expand the width of the FP registers as will be done in a future patch in order to support the 128 bit registers introduced with MSA. No behavioural change is intended by this patch. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Qais Yousef <qais.yousef@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6532/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Support for 64-bit FP with O32 binariesPaul Burton2014-01-131-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | CPUs implementing MIPS32 R2 may include a 64-bit FPU, just as MIPS64 CPUs do. In order to preserve backwards compatibility a 64-bit FPU will act like a 32-bit FPU (by accessing doubles from the least significant 32 bits of an even-odd pair of FP registers) when the Status.FR bit is zero, again just like a mips64 CPU. The standard O32 ABI is defined expecting a 32-bit FPU, however recent toolchains support use of a 64-bit FPU from an O32 MIPS32 executable. When an ELF executable is built to use a 64-bit FPU a new flag (EF_MIPS_FP64) is set in the ELF header. With this patch the kernel will check the EF_MIPS_FP64 flag when executing an O32 binary, and set Status.FR accordingly. The addition of O32 64-bit FP support lessens the opportunity for optimisation in the FPU emulator, so a CONFIG_MIPS_O32_FP64_SUPPORT Kconfig option is introduced to allow this support to be disabled for those that don't require it. Inspired by an earlier patch by Leonid Yegoshin, but implemented more cleanly & correctly. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Paul Burton <paul.burton@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/6154/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Whitespace cleanup.Ralf Baechle2013-02-011-1/+1
| | | | | | | | Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix missing prototypes in asm/fpu.hDmitri Vorobiev2008-07-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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] FPU ownership management & preemption fixesAtsushi Nemoto2007-03-171-4/+4
| | | | | 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 Engel2006-06-301-1/+0
| | | | | 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 Nemoto2006-06-191-14/+10
| | | | | | | | | 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>
* Get rid of the eir struct mips_fpu_emulator_private member. It'sRalf Baechle2005-10-291-4/+0
| | | | | | | | | 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>
* Cleanup fpuemuprivate declarations.Ralf Baechle2005-10-291-2/+0
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [PATCH] mips: clean up 32/64-bit configurationRalf Baechle2005-09-051-1/+1
| | | | | | | | 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>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+125
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!
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