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Merge remote-tracking branch 'lsk/v3.10/topic/arm64-misc' into linux-linaro-lsk

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Mark Brown 2014-10-24 10:50:51 +01:00
commit bfbceba4d4
1 changed files with 57 additions and 7 deletions
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64
arch/arm64/include/asm/barrier.h
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@ -25,21 +25,71 @@
#define wfi() asm volatile("wfi" : : : "memory")
#define isb() asm volatile("isb" : : : "memory")
#define dmb(opt) asm volatile("dmb sy" : : : "memory")
#define dsb(opt) asm volatile("dsb sy" : : : "memory")
#define dmb(opt) asm volatile("dmb " #opt : : : "memory")
#define dsb(opt) asm volatile("dsb " #opt : : : "memory")
#define mb() dsb(sy)
#define rmb() asm volatile("dsb ld" : : : "memory")
#define wmb() asm volatile("dsb st" : : : "memory")
#define rmb() dsb(ld)
#define wmb() dsb(st)
#ifndef CONFIG_SMP
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#define smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
barrier(); \
ACCESS_ONCE(*p) = (v); \
} while (0)
#define smp_load_acquire(p) \
({ \
typeof(*p) ___p1 = ACCESS_ONCE(*p); \
compiletime_assert_atomic_type(*p); \
barrier(); \
___p1; \
})
#else
#define smp_mb() asm volatile("dmb ish" : : : "memory")
#define smp_rmb() asm volatile("dmb ishld" : : : "memory")
#define smp_wmb() asm volatile("dmb ishst" : : : "memory")
#define smp_mb() dmb(ish)
#define smp_rmb() dmb(ishld)
#define smp_wmb() dmb(ishst)
#define smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
switch (sizeof(*p)) { \
case 4: \
asm volatile ("stlr %w1, %0" \
: "=Q" (*p) : "r" (v) : "memory"); \
break; \
case 8: \
asm volatile ("stlr %1, %0" \
: "=Q" (*p) : "r" (v) : "memory"); \
break; \
} \
} while (0)
#define smp_load_acquire(p) \
({ \
typeof(*p) ___p1; \
compiletime_assert_atomic_type(*p); \
switch (sizeof(*p)) { \
case 4: \
asm volatile ("ldar %w0, %1" \
: "=r" (___p1) : "Q" (*p) : "memory"); \
break; \
case 8: \
asm volatile ("ldar %0, %1" \
: "=r" (___p1) : "Q" (*p) : "memory"); \
break; \
} \
___p1; \
})
#endif
#define read_barrier_depends() do { } while(0)