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// SPDX-License-Identifier: GPL-2.0
#include <asm/barrier.h>
#include <asm/rwonce.h>
#include <linux/atomic.h>
#define GEN_READ_HELPER(tname, type) \
__rust_helper type rust_helper_atomic_##tname##_read(type *ptr) \
{ \
return READ_ONCE(*ptr); \
}
#define GEN_SET_HELPER(tname, type) \
__rust_helper void rust_helper_atomic_##tname##_set(type *ptr, type val) \
{ \
WRITE_ONCE(*ptr, val); \
}
#define GEN_READ_ACQUIRE_HELPER(tname, type) \
__rust_helper type rust_helper_atomic_##tname##_read_acquire(type *ptr) \
{ \
return smp_load_acquire(ptr); \
}
#define GEN_SET_RELEASE_HELPER(tname, type) \
__rust_helper void rust_helper_atomic_##tname##_set_release(type *ptr, type val)\
{ \
smp_store_release(ptr, val); \
}
#define GEN_READ_SET_HELPERS(tname, type) \
GEN_READ_HELPER(tname, type) \
GEN_SET_HELPER(tname, type) \
GEN_READ_ACQUIRE_HELPER(tname, type) \
GEN_SET_RELEASE_HELPER(tname, type) \
GEN_READ_SET_HELPERS(i8, s8)
GEN_READ_SET_HELPERS(i16, s16)
GEN_READ_SET_HELPERS(ptr, const void *)
/*
* xchg helpers depend on ARCH_SUPPORTS_ATOMIC_RMW and on the
* architecture provding xchg() support for i8 and i16.
*
* The architectures that currently support Rust (x86_64, armv7,
* arm64, riscv, and loongarch) satisfy these requirements.
*/
#define GEN_XCHG_HELPER(tname, type, suffix) \
__rust_helper type \
rust_helper_atomic_##tname##_xchg##suffix(type *ptr, type new) \
{ \
return xchg##suffix(ptr, new); \
}
#define GEN_XCHG_HELPERS(tname, type) \
GEN_XCHG_HELPER(tname, type, ) \
GEN_XCHG_HELPER(tname, type, _acquire) \
GEN_XCHG_HELPER(tname, type, _release) \
GEN_XCHG_HELPER(tname, type, _relaxed) \
GEN_XCHG_HELPERS(i8, s8)
GEN_XCHG_HELPERS(i16, s16)
GEN_XCHG_HELPERS(ptr, const void *)
/*
* try_cmpxchg helpers depend on ARCH_SUPPORTS_ATOMIC_RMW and on the
* architecture provding try_cmpxchg() support for i8 and i16.
*
* The architectures that currently support Rust (x86_64, armv7,
* arm64, riscv, and loongarch) satisfy these requirements.
*/
#define GEN_TRY_CMPXCHG_HELPER(tname, type, suffix) \
__rust_helper bool \
rust_helper_atomic_##tname##_try_cmpxchg##suffix(type *ptr, type *old, type new)\
{ \
return try_cmpxchg##suffix(ptr, old, new); \
}
#define GEN_TRY_CMPXCHG_HELPERS(tname, type) \
GEN_TRY_CMPXCHG_HELPER(tname, type, ) \
GEN_TRY_CMPXCHG_HELPER(tname, type, _acquire) \
GEN_TRY_CMPXCHG_HELPER(tname, type, _release) \
GEN_TRY_CMPXCHG_HELPER(tname, type, _relaxed) \
GEN_TRY_CMPXCHG_HELPERS(i8, s8)
GEN_TRY_CMPXCHG_HELPERS(i16, s16)
GEN_TRY_CMPXCHG_HELPERS(ptr, const void *)
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