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head/sys/arm/include/atomic-v6.h
| Show First 20 Lines • Show All 587 Lines • ▼ Show 20 Lines | |||||
| static __inline void | static __inline void | ||||
| atomic_store_rel_long(volatile u_long *p, u_long v) | atomic_store_rel_long(volatile u_long *p, u_long v) | ||||
| { | { | ||||
| dmb(); | dmb(); | ||||
| *p = v; | *p = v; | ||||
| } | } | ||||
| static __inline int | |||||
| atomic_testandset_32(volatile uint32_t *p, u_int v) | |||||
| { | |||||
| uint32_t tmp, tmp2, res, mask; | |||||
| mask = 1u << (v & 0x1f); | |||||
| tmp = tmp2 = 0; | |||||
| __asm __volatile( | |||||
| "1: ldrex %0, [%4] \n" | |||||
| " orr %1, %0, %3 \n" | |||||
| " strex %2, %1, [%4] \n" | |||||
| " cmp %2, #0 \n" | |||||
| " it ne \n" | |||||
| " bne 1b \n" | |||||
| : "=&r" (res), "=&r" (tmp), "=&r" (tmp2) | |||||
| : "r" (mask), "r" (p) | |||||
| : "cc", "memory"); | |||||
| return ((res & mask) != 0); | |||||
| } | |||||
| static __inline int | |||||
| atomic_testandset_int(volatile u_int *p, u_int v) | |||||
| { | |||||
| return (atomic_testandset_32((volatile uint32_t *)p, v)); | |||||
| } | |||||
| static __inline int | |||||
| atomic_testandset_long(volatile u_long *p, u_int v) | |||||
| { | |||||
| return (atomic_testandset_32((volatile uint32_t *)p, v)); | |||||
| } | |||||
| static __inline int | |||||
| atomic_testandset_64(volatile uint64_t *p, u_int v) | |||||
| { | |||||
| volatile uint32_t *p32; | |||||
| p32 = (volatile uint32_t *)p; | |||||
| /* Assume little-endian */ | |||||
| if (v >= 32) { | |||||
| v &= 0x1f; | |||||
| p32++; | |||||
| } | |||||
| return (atomic_testandset_32(p32, v)); | |||||
| } | |||||
| #undef ATOMIC_ACQ_REL | #undef ATOMIC_ACQ_REL | ||||
| #undef ATOMIC_ACQ_REL_LONG | #undef ATOMIC_ACQ_REL_LONG | ||||
| static __inline void | static __inline void | ||||
| atomic_thread_fence_acq(void) | atomic_thread_fence_acq(void) | ||||
| { | { | ||||
| dmb(); | dmb(); | ||||
| Show All 24 Lines | |||||