diff options
| author | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2007-11-25 11:47:56 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2008-01-29 10:14:58 +0000 |
| commit | 930bff882296c02ca81db108672ef4ca06c37db5 (patch) | |
| tree | 53288137d4f7cc02d8ca417edb2b25221c3007cd /arch/mips/lib/memset.S | |
| parent | 2064ba23e58daa929eec6f5e7a2abc24574a95b9 (diff) | |
[MIPS] IP28: added cache barrier to assembly routines
IP28 needs special treatment to avoid speculative accesses. gcc
takes care for .c code, but for assembly code we need to do it
manually.
This is taken from Peter Fuersts IP28 patches.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib/memset.S')
| -rw-r--r-- | arch/mips/lib/memset.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S index 3bf38422342..c018a472169 100644 --- a/arch/mips/lib/memset.S +++ b/arch/mips/lib/memset.S @@ -86,6 +86,7 @@ FEXPORT(__bzero) .set at #endif + R10KCBARRIER(0(ra)) #ifdef __MIPSEB__ EX(LONG_S_L, a1, (a0), first_fixup) /* make word/dword aligned */ #endif @@ -103,11 +104,13 @@ FEXPORT(__bzero) PTR_ADDU t1, a0 /* end address */ .set reorder 1: PTR_ADDIU a0, 64 + R10KCBARRIER(0(ra)) f_fill64 a0, -64, a1, fwd_fixup bne t1, a0, 1b .set noreorder memset_partial: + R10KCBARRIER(0(ra)) PTR_LA t1, 2f /* where to start */ #if LONGSIZE == 4 PTR_SUBU t1, t0 @@ -129,6 +132,7 @@ memset_partial: beqz a2, 1f PTR_ADDU a0, a2 /* What's left */ + R10KCBARRIER(0(ra)) #ifdef __MIPSEB__ EX(LONG_S_R, a1, -1(a0), last_fixup) #endif @@ -143,6 +147,7 @@ small_memset: PTR_ADDU t1, a0, a2 1: PTR_ADDIU a0, 1 /* fill bytewise */ + R10KCBARRIER(0(ra)) bne t1, a0, 1b sb a1, -1(a0) |