diff options
Diffstat (limited to 'arch/arm/include/asm/assembler.h')
| -rw-r--r-- | arch/arm/include/asm/assembler.h | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index 6e8f05c8a1c..062b58c029a 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -154,16 +154,39 @@ .long 9999b,9001f; \ .popsection +#ifdef CONFIG_SMP +#define ALT_SMP(instr...) \ +9998: instr +#define ALT_UP(instr...) \ + .pushsection ".alt.smp.init", "a" ;\ + .long 9998b ;\ + instr ;\ + .popsection +#define ALT_UP_B(label) \ + .equ up_b_offset, label - 9998b ;\ + .pushsection ".alt.smp.init", "a" ;\ + .long 9998b ;\ + b . + up_b_offset ;\ + .popsection +#else +#define ALT_SMP(instr...) +#define ALT_UP(instr...) instr +#define ALT_UP_B(label) b label +#endif + /* * SMP data memory barrier */ .macro smp_dmb #ifdef CONFIG_SMP #if __LINUX_ARM_ARCH__ >= 7 - dmb + ALT_SMP(dmb) #elif __LINUX_ARM_ARCH__ == 6 - mcr p15, 0, r0, c7, c10, 5 @ dmb + ALT_SMP(mcr p15, 0, r0, c7, c10, 5) @ dmb +#else +#error Incompatible SMP platform #endif + ALT_UP(nop) #endif .endm |