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| author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
| commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
| tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/sparc/lib/atomic_32.S | |
| parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
| parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'arch/sparc/lib/atomic_32.S')
| -rw-r--r-- | arch/sparc/lib/atomic_32.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/sparc/lib/atomic_32.S b/arch/sparc/lib/atomic_32.S new file mode 100644 index 00000000..eb6c7359 --- /dev/null +++ b/arch/sparc/lib/atomic_32.S @@ -0,0 +1,44 @@ +/* atomic.S: Move this stuff here for better ICACHE hit rates. + * + * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu) + */ + +#include <asm/ptrace.h> +#include <asm/psr.h> + + .text + .align 4 + + .globl __atomic_begin +__atomic_begin: + +#ifndef CONFIG_SMP + .globl ___xchg32_sun4c +___xchg32_sun4c: + rd %psr, %g3 + andcc %g3, PSR_PIL, %g0 + bne 1f + nop + wr %g3, PSR_PIL, %psr + nop; nop; nop +1: + andcc %g3, PSR_PIL, %g0 + ld [%g1], %g7 + bne 1f + st %g2, [%g1] + wr %g3, 0x0, %psr + nop; nop; nop +1: + mov %g7, %g2 + jmpl %o7 + 8, %g0 + mov %g4, %o7 + + .globl ___xchg32_sun4md +___xchg32_sun4md: + swap [%g1], %g2 + jmpl %o7 + 8, %g0 + mov %g4, %o7 +#endif + + .globl __atomic_end +__atomic_end: |