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| author |   Markos Chandras <markos.chandras@imgtec.com> | 2014-01-03 10:11:45 +0000 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2014-03-26 23:09:15 +0100 |
| commit | fd9720e96e856160f94907db06b707841cbafb0d (patch) | |
| tree | 4586a2d89749ee8a729a1a7f9b05bfac66a30879 /arch/mips/lib | |
| parent | MIPS: lib: memset: Use macro to build the __bzero symbol (diff) | |
| download | linux-dev-fd9720e96e856160f94907db06b707841cbafb0d.tar.xz linux-dev-fd9720e96e856160f94907db06b707841cbafb0d.zip | |
MIPS: lib: memset: Add EVA support for the __bzero function.
Build the __bzero function using the EVA load/store instructions
when operating in the EVA mode. This function is only used when
accessing user code so there is no need to build two distinct symbols
for user and kernel operations respectively.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Diffstat (limited to 'arch/mips/lib')
| -rw-r--r-- | arch/mips/lib/memset.S | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S index 05fac199cc0c..7b0e5462ca51 100644 --- a/arch/mips/lib/memset.S +++ b/arch/mips/lib/memset.S @@ -37,13 +37,24 @@ #define LEGACY_MODE 1 #define EVA_MODE 2 +/* + * No need to protect it with EVA #ifdefery. The generated block of code + * will never be assembled if EVA is not enabled. + */ +#define __EVAFY(insn, reg, addr) __BUILD_EVA_INSN(insn##e, reg, addr) +#define ___BUILD_EVA_INSN(insn, reg, addr) __EVAFY(insn, reg, addr) + #define EX(insn,reg,addr,handler) \ -9: insn reg, addr; \ + .if \mode == LEGACY_MODE; \ +9: insn reg, addr; \ + .else; \ +9: ___BUILD_EVA_INSN(insn, reg, addr); \ + .endif; \ .section __ex_table,"a"; \ PTR 9b, handler; \ .previous - .macro f_fill64 dst, offset, val, fixup + .macro f_fill64 dst, offset, val, fixup, mode EX(LONG_S, \val, (\offset + 0 * STORSIZE)(\dst), \fixup) EX(LONG_S, \val, (\offset + 1 * STORSIZE)(\dst), \fixup) EX(LONG_S, \val, (\offset + 2 * STORSIZE)(\dst), \fixup) @@ -119,7 +130,7 @@ .set reorder 1: PTR_ADDIU a0, 64 R10KCBARRIER(0(ra)) - f_fill64 a0, -64, FILL64RG, .Lfwd_fixup\@ + f_fill64 a0, -64, FILL64RG, .Lfwd_fixup\@, \mode bne t1, a0, 1b .set noreorder @@ -144,7 +155,7 @@ .set noreorder .set nomacro /* ... but first do longs ... */ - f_fill64 a0, -64, FILL64RG, .Lpartial_fixup\@ + f_fill64 a0, -64, FILL64RG, .Lpartial_fixup\@, \mode 2: .set pop andi a2, STORMASK /* At most one long to go */ @@ -225,5 +236,13 @@ LEAF(memset) #endif or a1, t1 1: +#ifndef CONFIG_EVA FEXPORT(__bzero) +#endif __BUILD_BZERO LEGACY_MODE + +#ifdef CONFIG_EVA +LEAF(__bzero) + __BUILD_BZERO EVA_MODE +END(__bzero) +#endif |