Rework the atomic code to reduce the repetition. This merges some of the
atomic functions where they are almost identical, or have acquire/release semantics. While here clean these function up. The cbnz instruction doesn't change the condition flags so drop cc, however they should have memory added to the clobber list. Reviewed by: kib Sponsored by: ABT Systems Ltd Differential Revision: https://reviews.freebsd.org/D4318
This commit is contained in:
Andrew Turner
parent
b4e63e2d15
commit
119a353e3d
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=291580
@ -53,56 +53,101 @@
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#define wmb() dmb(st) /* Full system memory barrier store */
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#define rmb() dmb(ld) /* Full system memory barrier load */
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static __inline void
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atomic_add_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" add %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc"
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);
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#define ATOMIC_OP(op, asm_op, bar, a, l) \
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static __inline void \
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atomic_##op##_##bar##32(volatile uint32_t *p, uint32_t val) \
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{ \
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uint32_t tmp; \
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int res; \
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\
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__asm __volatile( \
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"1: ld"#a"xr %w0, [%2] \n" \
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" "#asm_op" %w0, %w0, %w3 \n" \
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" st"#l"xr %w1, %w0, [%2] \n" \
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" cbnz %w1, 1b \n" \
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: "=&r"(tmp), "=&r"(res) \
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: "r" (p), "r" (val) \
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: "memory" \
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); \
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} \
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\
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static __inline void \
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atomic_##op##_##bar##64(volatile uint64_t *p, uint64_t val) \
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{ \
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uint64_t tmp; \
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int res; \
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\
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__asm __volatile( \
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"1: ld"#a"xr %0, [%2] \n" \
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" "#asm_op" %0, %0, %3 \n" \
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" st"#l"xr %w1, %0, [%2] \n" \
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" cbnz %w1, 1b \n" \
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: "=&r"(tmp), "=&r"(res) \
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: "r" (p), "r" (val) \
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: "memory" \
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); \
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}
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static __inline void
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atomic_clear_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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#define ATOMIC(op, asm_op) \
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ATOMIC_OP(op, asm_op, , , ) \
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ATOMIC_OP(op, asm_op, acq_, a, ) \
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ATOMIC_OP(op, asm_op, rel_, , l) \
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" bic %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc"
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);
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ATOMIC(add, add)
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ATOMIC(clear, bic)
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ATOMIC(set, orr)
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ATOMIC(subtract, sub)
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#define ATOMIC_CMPSET(bar, a, l) \
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static __inline int \
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atomic_cmpset_##bar##32(volatile uint32_t *p, uint32_t cmpval, \
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uint32_t newval) \
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{ \
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uint32_t tmp; \
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int res; \
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\
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__asm __volatile( \
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"1: mov %w1, #1 \n" \
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" ld"#a"xr %w0, [%2] \n" \
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" cmp %w0, %w3 \n" \
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" b.ne 2f \n" \
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" st"#l"xr %w1, %w4, [%2] \n" \
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" cbnz %w1, 1b \n" \
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"2:" \
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: "=&r"(tmp), "=&r"(res) \
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: "r" (p), "r" (cmpval), "r" (newval) \
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: "cc", "memory" \
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); \
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\
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return (!res); \
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} \
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\
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static __inline int \
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atomic_cmpset_##bar##64(volatile uint64_t *p, uint64_t cmpval, \
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uint64_t newval) \
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{ \
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uint64_t tmp; \
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int res; \
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\
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__asm __volatile( \
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"1: mov %w1, #1 \n" \
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" ld"#a"xr %0, [%2] \n" \
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" cmp %0, %3 \n" \
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" b.ne 2f \n" \
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" st"#l"xr %w1, %4, [%2] \n" \
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" cbnz %w1, 1b \n" \
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"2:" \
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: "=&r"(tmp), "=&r"(res) \
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: "r" (p), "r" (cmpval), "r" (newval) \
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: "cc", "memory" \
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); \
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\
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return (!res); \
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}
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static __inline int
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atomic_cmpset_32(volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: mov %w1, #1 \n"
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" ldxr %w0, [%2] \n"
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" cmp %w0, %w3 \n"
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" b.ne 2f \n"
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" stxr %w1, %w4, [%2] \n"
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" cbnz %w1, 1b \n"
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"2:"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (cmpval), "+r" (newval)
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: : "cc"
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);
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return (!res);
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}
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ATOMIC_CMPSET( , , )
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ATOMIC_CMPSET(acq_, a, )
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ATOMIC_CMPSET(rel_, ,l)
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static __inline uint32_t
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atomic_fetchadd_32(volatile uint32_t *p, uint32_t val)
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@ -111,341 +156,18 @@ atomic_fetchadd_32(volatile uint32_t *p, uint32_t val)
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int res;
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__asm __volatile(
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"1: ldxr %w4, [%2] \n"
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" add %w0, %w4, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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"1: ldxr %w2, [%3] \n"
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" add %w0, %w2, %w4 \n"
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" stxr %w1, %w0, [%3] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val), "=&r"(ret) : : "cc"
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: "=&r"(tmp), "=&r"(res), "=&r"(ret)
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: "r" (p), "r" (val)
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: "memory"
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);
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return (ret);
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}
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static __inline uint32_t
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atomic_readandclear_32(volatile uint32_t *p)
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{
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uint32_t tmp, ret;
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int res;
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__asm __volatile(
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" mov %w0, #0 \n"
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"1: ldxr %w3, [%2] \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "=&r"(ret) : : "cc"
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);
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return (ret);
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}
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static __inline void
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atomic_set_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" orr %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc"
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);
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}
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static __inline uint32_t
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atomic_swap_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" stxr %w1, %w3, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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return (tmp);
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}
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static __inline void
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atomic_subtract_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" sub %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc"
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);
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}
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#define atomic_add_int atomic_add_32
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#define atomic_clear_int atomic_clear_32
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#define atomic_cmpset_int atomic_cmpset_32
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#define atomic_fetchadd_int atomic_fetchadd_32
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#define atomic_readandclear_int atomic_readandclear_32
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#define atomic_set_int atomic_set_32
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#define atomic_swap_int atomic_swap_32
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#define atomic_subtract_int atomic_subtract_32
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static __inline void
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atomic_add_acq_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldaxr %w0, [%2] \n"
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" add %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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"2:"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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static __inline void
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atomic_clear_acq_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldaxr %w0, [%2] \n"
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" bic %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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static __inline int
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atomic_cmpset_acq_32(volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: mov %w1, #1 \n"
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" ldaxr %w0, [%2] \n"
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" cmp %w0, %w3 \n"
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" b.ne 2f \n"
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" stxr %w1, %w4, [%2] \n"
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" cbnz %w1, 1b \n"
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"2:"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (cmpval), "+r" (newval)
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: : "cc", "memory"
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);
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return (!res);
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}
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static __inline uint32_t
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atomic_load_acq_32(volatile uint32_t *p)
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{
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uint32_t ret;
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__asm __volatile(
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"ldar %w0, [%1] \n"
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: "=&r" (ret) : "r" (p) : "memory");
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return (ret);
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}
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static __inline void
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atomic_set_acq_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldaxr %w0, [%2] \n"
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" orr %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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static __inline void
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atomic_subtract_acq_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldaxr %w0, [%2] \n"
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" sub %w0, %w0, %w3 \n"
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" stxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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#define atomic_add_acq_int atomic_add_acq_32
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#define atomic_clear_acq_int atomic_clear_acq_32
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#define atomic_cmpset_acq_int atomic_cmpset_acq_32
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#define atomic_load_acq_int atomic_load_acq_32
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#define atomic_set_acq_int atomic_set_acq_32
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#define atomic_subtract_acq_int atomic_subtract_acq_32
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/* The atomic functions currently are both acq and rel, we should fix this. */
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static __inline void
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atomic_add_rel_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" add %w0, %w0, %w3 \n"
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" stlxr %w1, %w0, [%2] \n"
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" cbnz %w1, 1b \n"
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"2:"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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static __inline void
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atomic_clear_rel_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" bic %w0, %w0, %w3 \n"
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" stlxr %w1, %w0, [%2] \n"
|
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" cbnz %w1, 1b \n"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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static __inline int
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atomic_cmpset_rel_32(volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: mov %w1, #1 \n"
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" ldxr %w0, [%2] \n"
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" cmp %w0, %w3 \n"
|
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" b.ne 2f \n"
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" stlxr %w1, %w4, [%2] \n"
|
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" cbnz %w1, 1b \n"
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"2:"
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (cmpval), "+r" (newval)
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: : "cc", "memory"
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);
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return (!res);
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}
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static __inline void
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atomic_set_rel_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
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" orr %w0, %w0, %w3 \n"
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" stlxr %w1, %w0, [%2] \n"
|
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" cbnz %w1, 1b \n"
|
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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static __inline void
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atomic_store_rel_32(volatile uint32_t *p, uint32_t val)
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{
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__asm __volatile(
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"stlr %w0, [%1] \n"
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: : "r" (val), "r" (p) : "memory");
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}
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static __inline void
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atomic_subtract_rel_32(volatile uint32_t *p, uint32_t val)
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{
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uint32_t tmp;
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int res;
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__asm __volatile(
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"1: ldxr %w0, [%2] \n"
|
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" sub %w0, %w0, %w3 \n"
|
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" stlxr %w1, %w0, [%2] \n"
|
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" cbnz %w1, 1b \n"
|
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: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
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);
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}
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#define atomic_add_rel_int atomic_add_rel_32
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#define atomic_clear_rel_int atomic_add_rel_32
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#define atomic_cmpset_rel_int atomic_cmpset_rel_32
|
||||
#define atomic_set_rel_int atomic_set_rel_32
|
||||
#define atomic_subtract_rel_int atomic_subtract_rel_32
|
||||
#define atomic_store_rel_int atomic_store_rel_32
|
||||
|
||||
|
||||
static __inline void
|
||||
atomic_add_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" add %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r" (tmp), "=&r" (res), "+r" (p), "+r" (val) : : "cc"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_clear_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" bic %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline int
|
||||
atomic_cmpset_64(volatile uint64_t *p, uint64_t cmpval, uint64_t newval)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: mov %w1, #1 \n"
|
||||
" ldxr %0, [%2] \n"
|
||||
" cmp %0, %3 \n"
|
||||
" b.ne 2f \n"
|
||||
" stxr %w1, %4, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
"2:"
|
||||
: "=&r" (tmp), "=&r"(res), "+r" (p), "+r" (cmpval), "+r" (newval)
|
||||
: : "cc", "memory"
|
||||
);
|
||||
|
||||
return (!res);
|
||||
}
|
||||
|
||||
static __inline uint64_t
|
||||
atomic_fetchadd_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
@ -453,11 +175,31 @@ atomic_fetchadd_64(volatile uint64_t *p, uint64_t val)
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %4, [%2] \n"
|
||||
" add %0, %4, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
"1: ldxr %2, [%3] \n"
|
||||
" add %0, %2, %4 \n"
|
||||
" stxr %w1, %0, [%3] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val), "=&r"(ret) : : "cc"
|
||||
: "=&r"(tmp), "=&r"(res), "=&r"(ret)
|
||||
: "r" (p), "r" (val)
|
||||
: "memory"
|
||||
);
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static __inline uint32_t
|
||||
atomic_readandclear_32(volatile uint32_t *p)
|
||||
{
|
||||
uint32_t ret;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %w1, [%2] \n"
|
||||
" stxr %w0, wzr, [%2] \n"
|
||||
" cbnz %w0, 1b \n"
|
||||
: "=&r"(res), "=&r"(ret)
|
||||
: "r" (p)
|
||||
: "memory"
|
||||
);
|
||||
|
||||
return (ret);
|
||||
@ -466,66 +208,131 @@ atomic_fetchadd_64(volatile uint64_t *p, uint64_t val)
|
||||
static __inline uint64_t
|
||||
atomic_readandclear_64(volatile uint64_t *p)
|
||||
{
|
||||
uint64_t tmp, ret;
|
||||
uint64_t ret;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
" mov %0, #0 \n"
|
||||
"1: ldxr %3, [%2] \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "=&r"(ret) : : "cc"
|
||||
"1: ldxr %1, [%2] \n"
|
||||
" stxr %w0, xzr, [%2] \n"
|
||||
" cbnz %w0, 1b \n"
|
||||
: "=&r"(res), "=&r"(ret)
|
||||
: "r" (p)
|
||||
: "memory"
|
||||
);
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_set_64(volatile uint64_t *p, uint64_t val)
|
||||
static __inline uint32_t
|
||||
atomic_swap_32(volatile uint32_t *p, uint32_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
uint32_t ret;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" orr %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc"
|
||||
"1: ldxr %w0, [%2] \n"
|
||||
" stxr %w1, %w3, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(ret), "=&r"(res)
|
||||
: "r" (p), "r" (val)
|
||||
: "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_subtract_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" sub %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc"
|
||||
);
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static __inline uint64_t
|
||||
atomic_swap_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t old;
|
||||
uint64_t ret;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" stxr %w1, %3, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(old), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(ret), "=&r"(res)
|
||||
: "r" (p), "r" (val)
|
||||
: "memory"
|
||||
);
|
||||
|
||||
return (old);
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static __inline uint32_t
|
||||
atomic_load_acq_32(volatile uint32_t *p)
|
||||
{
|
||||
uint32_t ret;
|
||||
|
||||
__asm __volatile(
|
||||
"ldar %w0, [%1] \n"
|
||||
: "=&r" (ret)
|
||||
: "r" (p)
|
||||
: "memory");
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static __inline uint64_t
|
||||
atomic_load_acq_64(volatile uint64_t *p)
|
||||
{
|
||||
uint64_t ret;
|
||||
|
||||
__asm __volatile(
|
||||
"ldar %0, [%1] \n"
|
||||
: "=&r" (ret)
|
||||
: "r" (p)
|
||||
: "memory");
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_store_rel_32(volatile uint32_t *p, uint32_t val)
|
||||
{
|
||||
|
||||
__asm __volatile(
|
||||
"stlr %w0, [%1] \n"
|
||||
:
|
||||
: "r" (val), "r" (p)
|
||||
: "memory");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_store_rel_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
|
||||
__asm __volatile(
|
||||
"stlr %0, [%1] \n"
|
||||
:
|
||||
: "r" (val), "r" (p)
|
||||
: "memory");
|
||||
}
|
||||
|
||||
|
||||
#define atomic_add_int atomic_add_32
|
||||
#define atomic_clear_int atomic_clear_32
|
||||
#define atomic_cmpset_int atomic_cmpset_32
|
||||
#define atomic_fetchadd_int atomic_fetchadd_32
|
||||
#define atomic_readandclear_int atomic_readandclear_32
|
||||
#define atomic_set_int atomic_set_32
|
||||
#define atomic_swap_int atomic_swap_32
|
||||
#define atomic_subtract_int atomic_subtract_32
|
||||
|
||||
#define atomic_add_acq_int atomic_add_acq_32
|
||||
#define atomic_clear_acq_int atomic_clear_acq_32
|
||||
#define atomic_cmpset_acq_int atomic_cmpset_acq_32
|
||||
#define atomic_load_acq_int atomic_load_acq_32
|
||||
#define atomic_set_acq_int atomic_set_acq_32
|
||||
#define atomic_subtract_acq_int atomic_subtract_acq_32
|
||||
|
||||
#define atomic_add_rel_int atomic_add_rel_32
|
||||
#define atomic_clear_rel_int atomic_add_rel_32
|
||||
#define atomic_cmpset_rel_int atomic_cmpset_rel_32
|
||||
#define atomic_set_rel_int atomic_set_rel_32
|
||||
#define atomic_subtract_rel_int atomic_subtract_rel_32
|
||||
#define atomic_store_rel_int atomic_store_rel_32
|
||||
|
||||
#define atomic_add_long atomic_add_64
|
||||
#define atomic_clear_long atomic_clear_64
|
||||
#define atomic_cmpset_long atomic_cmpset_64
|
||||
@ -544,100 +351,6 @@ atomic_swap_64(volatile uint64_t *p, uint64_t val)
|
||||
#define atomic_swap_ptr atomic_swap_64
|
||||
#define atomic_subtract_ptr atomic_subtract_64
|
||||
|
||||
static __inline void
|
||||
atomic_add_acq_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldaxr %0, [%2] \n"
|
||||
" add %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
"2:"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_clear_acq_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldaxr %0, [%2] \n"
|
||||
" bic %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline int
|
||||
atomic_cmpset_acq_64(volatile uint64_t *p, uint64_t cmpval, uint64_t newval)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: mov %w1, #1 \n"
|
||||
" ldaxr %0, [%2] \n"
|
||||
" cmp %0, %3 \n"
|
||||
" b.ne 2f \n"
|
||||
" stxr %w1, %4, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
"2:"
|
||||
: "=&r" (tmp), "=&r" (res), "+r" (p), "+r" (cmpval), "+r" (newval)
|
||||
: : "cc", "memory"
|
||||
);
|
||||
|
||||
return (!res);
|
||||
}
|
||||
|
||||
static __inline uint64_t
|
||||
atomic_load_acq_64(volatile uint64_t *p)
|
||||
{
|
||||
uint64_t ret;
|
||||
|
||||
__asm __volatile(
|
||||
"ldar %0, [%1] \n"
|
||||
: "=&r" (ret) : "r" (p) : "memory");
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_set_acq_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldaxr %0, [%2] \n"
|
||||
" orr %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_subtract_acq_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldaxr %0, [%2] \n"
|
||||
" sub %0, %0, %3 \n"
|
||||
" stxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
|
||||
#define atomic_add_acq_long atomic_add_acq_64
|
||||
#define atomic_clear_acq_long atomic_add_acq_64
|
||||
#define atomic_cmpset_acq_long atomic_cmpset_acq_64
|
||||
@ -652,100 +365,19 @@ atomic_subtract_acq_64(volatile uint64_t *p, uint64_t val)
|
||||
#define atomic_set_acq_ptr atomic_set_acq_64
|
||||
#define atomic_subtract_acq_ptr atomic_subtract_acq_64
|
||||
|
||||
/*
|
||||
* TODO: The atomic functions currently are both acq and rel, we should fix
|
||||
* this.
|
||||
*/
|
||||
static __inline void
|
||||
atomic_add_rel_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
#define atomic_add_rel_long atomic_add_rel_64
|
||||
#define atomic_clear_rel_long atomic_clear_rel_64
|
||||
#define atomic_cmpset_rel_long atomic_cmpset_rel_64
|
||||
#define atomic_set_rel_long atomic_set_rel_64
|
||||
#define atomic_subtract_rel_long atomic_subtract_rel_64
|
||||
#define atomic_store_rel_long atomic_store_rel_64
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" add %0, %0, %3 \n"
|
||||
" stlxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
"2:"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_clear_rel_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" bic %0, %0, %3 \n"
|
||||
" stlxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline int
|
||||
atomic_cmpset_rel_64(volatile uint64_t *p, uint64_t cmpval, uint64_t newval)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: mov %w1, #1 \n"
|
||||
" ldxr %0, [%2] \n"
|
||||
" cmp %0, %3 \n"
|
||||
" b.ne 2f \n"
|
||||
" stlxr %w1, %4, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
"2:"
|
||||
: "=&r" (tmp), "=&r" (res), "+r" (p), "+r" (cmpval), "+r" (newval)
|
||||
: : "cc", "memory"
|
||||
);
|
||||
|
||||
return (!res);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_set_rel_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" orr %0, %0, %3 \n"
|
||||
" stlxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_store_rel_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
|
||||
__asm __volatile(
|
||||
"stlr %0, [%1] \n"
|
||||
: : "r" (val), "r" (p) : "memory");
|
||||
}
|
||||
|
||||
static __inline void
|
||||
atomic_subtract_rel_64(volatile uint64_t *p, uint64_t val)
|
||||
{
|
||||
uint64_t tmp;
|
||||
int res;
|
||||
|
||||
__asm __volatile(
|
||||
"1: ldxr %0, [%2] \n"
|
||||
" sub %0, %0, %3 \n"
|
||||
" stlxr %w1, %0, [%2] \n"
|
||||
" cbnz %w1, 1b \n"
|
||||
: "=&r"(tmp), "=&r"(res), "+r" (p), "+r" (val) : : "cc", "memory"
|
||||
);
|
||||
}
|
||||
#define atomic_add_rel_ptr atomic_add_rel_64
|
||||
#define atomic_clear_rel_ptr atomic_clear_rel_64
|
||||
#define atomic_cmpset_rel_ptr atomic_cmpset_rel_64
|
||||
#define atomic_set_rel_ptr atomic_set_rel_64
|
||||
#define atomic_subtract_rel_ptr atomic_subtract_rel_64
|
||||
#define atomic_store_rel_ptr atomic_store_rel_64
|
||||
|
||||
static __inline void
|
||||
atomic_thread_fence_acq(void)
|
||||
@ -775,19 +407,5 @@ atomic_thread_fence_seq_cst(void)
|
||||
dmb(sy);
|
||||
}
|
||||
|
||||
#define atomic_add_rel_long atomic_add_rel_64
|
||||
#define atomic_clear_rel_long atomic_clear_rel_64
|
||||
#define atomic_cmpset_rel_long atomic_cmpset_rel_64
|
||||
#define atomic_set_rel_long atomic_set_rel_64
|
||||
#define atomic_subtract_rel_long atomic_subtract_rel_64
|
||||
#define atomic_store_rel_long atomic_store_rel_64
|
||||
|
||||
#define atomic_add_rel_ptr atomic_add_rel_64
|
||||
#define atomic_clear_rel_ptr atomic_clear_rel_64
|
||||
#define atomic_cmpset_rel_ptr atomic_cmpset_rel_64
|
||||
#define atomic_set_rel_ptr atomic_set_rel_64
|
||||
#define atomic_subtract_rel_ptr atomic_subtract_rel_64
|
||||
#define atomic_store_rel_ptr atomic_store_rel_64
|
||||
|
||||
#endif /* _MACHINE_ATOMIC_H_ */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user