diff options
| author | Anton Blanchard <anton@samba.org> | 2015-10-29 11:43:59 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-01 13:52:25 +1100 |
| commit | 611b0e5c19963374175b39f42117b03ee7573228 (patch) | |
| tree | 31a1ae1a8d869e574386650d5ef33e9a200d59be /arch/powerpc/include/asm | |
| parent | b86fd2bd03021ce906bfa0c1456ec38329e31b30 (diff) | |
| download | linux-611b0e5c19963374175b39f42117b03ee7573228.tar.bz2 | |
powerpc: Create mtmsrd_isync()
mtmsrd_isync() will do an mtmsrd followed by an isync on older
processors. On newer processors we avoid the isync via a feature fixup.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index a908ada8e0a5..987dac090244 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -1193,12 +1193,20 @@ #define __mtmsrd(v, l) asm volatile("mtmsrd %0," __stringify(l) \ : : "r" (v) : "memory") #define mtmsr(v) __mtmsrd((v), 0) +#define __MTMSR "mtmsrd" #else #define mtmsr(v) asm volatile("mtmsr %0" : \ : "r" ((unsigned long)(v)) \ : "memory") +#define __MTMSR "mtmsr" #endif +static inline void mtmsr_isync(unsigned long val) +{ + asm volatile(__MTMSR " %0; " ASM_FTR_IFCLR("isync", "nop", %1) : : + "r" (val), "i" (CPU_FTR_ARCH_206) : "memory"); +} + #define mfspr(rn) ({unsigned long rval; \ asm volatile("mfspr %0," __stringify(rn) \ : "=r" (rval)); rval;}) |