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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Atomic operations (AMO).
*
* Copyright (C) 2020-2025 Loongson Technology Corporation Limited
*/
#ifndef _ASM_ATOMIC_AMO_H
#define _ASM_ATOMIC_AMO_H
#include <linux/types.h>
#include <asm/barrier.h>
#include <asm/cmpxchg.h>
#define ATOMIC_OP(op, I, asm_op) \
static inline void arch_atomic_##op(int i, atomic_t *v) \
{ \
__asm__ __volatile__( \
"am"#asm_op".w" " $zero, %1, %0 \n" \
: "+ZB" (v->counter) \
: "r" (I) \
: "memory"); \
}
#define ATOMIC_OP_RETURN(op, I, asm_op, c_op, mb, suffix) \
static inline int arch_atomic_##op##_return##suffix(int i, atomic_t *v) \
{ \
int result; \
\
__asm__ __volatile__( \
"am"#asm_op#mb".w" " %1, %2, %0 \n" \
: "+ZB" (v->counter), "=&r" (result) \
: "r" (I) \
: "memory"); \
\
return result c_op I; \
}
#define ATOMIC_FETCH_OP(op, I, asm_op, mb, suffix) \
static inline int arch_atomic_fetch_##op##suffix(int i, atomic_t *v) \
{ \
int result; \
\
__asm__ __volatile__( \
"am"#asm_op#mb".w" " %1, %2, %0 \n" \
: "+ZB" (v->counter), "=&r" (result) \
: "r" (I) \
: "memory"); \
\
return result; \
}
#define ATOMIC_OPS(op, I, asm_op, c_op) \
ATOMIC_OP(op, I, asm_op) \
ATOMIC_OP_RETURN(op, I, asm_op, c_op, _db, ) \
ATOMIC_OP_RETURN(op, I, asm_op, c_op, , _relaxed) \
ATOMIC_FETCH_OP(op, I, asm_op, _db, ) \
ATOMIC_FETCH_OP(op, I, asm_op, , _relaxed)
ATOMIC_OPS(add, i, add, +)
ATOMIC_OPS(sub, -i, add, +)
#define arch_atomic_add_return arch_atomic_add_return
#define arch_atomic_add_return_acquire arch_atomic_add_return
#define arch_atomic_add_return_release arch_atomic_add_return
#define arch_atomic_add_return_relaxed arch_atomic_add_return_relaxed
#define arch_atomic_sub_return arch_atomic_sub_return
#define arch_atomic_sub_return_acquire arch_atomic_sub_return
#define arch_atomic_sub_return_release arch_atomic_sub_return
#define arch_atomic_sub_return_relaxed arch_atomic_sub_return_relaxed
#define arch_atomic_fetch_add arch_atomic_fetch_add
#define arch_atomic_fetch_add_acquire arch_atomic_fetch_add
#define arch_atomic_fetch_add_release arch_atomic_fetch_add
#define arch_atomic_fetch_add_relaxed arch_atomic_fetch_add_relaxed
#define arch_atomic_fetch_sub arch_atomic_fetch_sub
#define arch_atomic_fetch_sub_acquire arch_atomic_fetch_sub
#define arch_atomic_fetch_sub_release arch_atomic_fetch_sub
#define arch_atomic_fetch_sub_relaxed arch_atomic_fetch_sub_relaxed
#undef ATOMIC_OPS
#define ATOMIC_OPS(op, I, asm_op) \
ATOMIC_OP(op, I, asm_op) \
ATOMIC_FETCH_OP(op, I, asm_op, _db, ) \
ATOMIC_FETCH_OP(op, I, asm_op, , _relaxed)
ATOMIC_OPS(and, i, and)
ATOMIC_OPS(or, i, or)
ATOMIC_OPS(xor, i, xor)
#define arch_atomic_fetch_and arch_atomic_fetch_and
#define arch_atomic_fetch_and_acquire arch_atomic_fetch_and
#define arch_atomic_fetch_and_release arch_atomic_fetch_and
#define arch_atomic_fetch_and_relaxed arch_atomic_fetch_and_relaxed
#define arch_atomic_fetch_or arch_atomic_fetch_or
#define arch_atomic_fetch_or_acquire arch_atomic_fetch_or
#define arch_atomic_fetch_or_release arch_atomic_fetch_or
#define arch_atomic_fetch_or_relaxed arch_atomic_fetch_or_relaxed
#define arch_atomic_fetch_xor arch_atomic_fetch_xor
#define arch_atomic_fetch_xor_acquire arch_atomic_fetch_xor
#define arch_atomic_fetch_xor_release arch_atomic_fetch_xor
#define arch_atomic_fetch_xor_relaxed arch_atomic_fetch_xor_relaxed
#undef ATOMIC_OPS
#undef ATOMIC_FETCH_OP
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP
#ifdef CONFIG_64BIT
#define ATOMIC64_OP(op, I, asm_op) \
static inline void arch_atomic64_##op(long i, atomic64_t *v) \
{ \
__asm__ __volatile__( \
"am"#asm_op".d " " $zero, %1, %0 \n" \
: "+ZB" (v->counter) \
: "r" (I) \
: "memory"); \
}
#define ATOMIC64_OP_RETURN(op, I, asm_op, c_op, mb, suffix) \
static inline long arch_atomic64_##op##_return##suffix(long i, atomic64_t *v) \
{ \
long result; \
__asm__ __volatile__( \
"am"#asm_op#mb".d " " %1, %2, %0 \n" \
: "+ZB" (v->counter), "=&r" (result) \
: "r" (I) \
: "memory"); \
\
return result c_op I; \
}
#define ATOMIC64_FETCH_OP(op, I, asm_op, mb, suffix) \
static inline long arch_atomic64_fetch_##op##suffix(long i, atomic64_t *v) \
{ \
long result; \
\
__asm__ __volatile__( \
"am"#asm_op#mb".d " " %1, %2, %0 \n" \
: "+ZB" (v->counter), "=&r" (result) \
: "r" (I) \
: "memory"); \
\
return result; \
}
#define ATOMIC64_OPS(op, I, asm_op, c_op) \
ATOMIC64_OP(op, I, asm_op) \
ATOMIC64_OP_RETURN(op, I, asm_op, c_op, _db, ) \
ATOMIC64_OP_RETURN(op, I, asm_op, c_op, , _relaxed) \
ATOMIC64_FETCH_OP(op, I, asm_op, _db, ) \
ATOMIC64_FETCH_OP(op, I, asm_op, , _relaxed)
ATOMIC64_OPS(add, i, add, +)
ATOMIC64_OPS(sub, -i, add, +)
#define arch_atomic64_add_return arch_atomic64_add_return
#define arch_atomic64_add_return_acquire arch_atomic64_add_return
#define arch_atomic64_add_return_release arch_atomic64_add_return
#define arch_atomic64_add_return_relaxed arch_atomic64_add_return_relaxed
#define arch_atomic64_sub_return arch_atomic64_sub_return
#define arch_atomic64_sub_return_acquire arch_atomic64_sub_return
#define arch_atomic64_sub_return_release arch_atomic64_sub_return
#define arch_atomic64_sub_return_relaxed arch_atomic64_sub_return_relaxed
#define arch_atomic64_fetch_add arch_atomic64_fetch_add
#define arch_atomic64_fetch_add_acquire arch_atomic64_fetch_add
#define arch_atomic64_fetch_add_release arch_atomic64_fetch_add
#define arch_atomic64_fetch_add_relaxed arch_atomic64_fetch_add_relaxed
#define arch_atomic64_fetch_sub arch_atomic64_fetch_sub
#define arch_atomic64_fetch_sub_acquire arch_atomic64_fetch_sub
#define arch_atomic64_fetch_sub_release arch_atomic64_fetch_sub
#define arch_atomic64_fetch_sub_relaxed arch_atomic64_fetch_sub_relaxed
#undef ATOMIC64_OPS
#define ATOMIC64_OPS(op, I, asm_op) \
ATOMIC64_OP(op, I, asm_op) \
ATOMIC64_FETCH_OP(op, I, asm_op, _db, ) \
ATOMIC64_FETCH_OP(op, I, asm_op, , _relaxed)
ATOMIC64_OPS(and, i, and)
ATOMIC64_OPS(or, i, or)
ATOMIC64_OPS(xor, i, xor)
#define arch_atomic64_fetch_and arch_atomic64_fetch_and
#define arch_atomic64_fetch_and_acquire arch_atomic64_fetch_and
#define arch_atomic64_fetch_and_release arch_atomic64_fetch_and
#define arch_atomic64_fetch_and_relaxed arch_atomic64_fetch_and_relaxed
#define arch_atomic64_fetch_or arch_atomic64_fetch_or
#define arch_atomic64_fetch_or_acquire arch_atomic64_fetch_or
#define arch_atomic64_fetch_or_release arch_atomic64_fetch_or
#define arch_atomic64_fetch_or_relaxed arch_atomic64_fetch_or_relaxed
#define arch_atomic64_fetch_xor arch_atomic64_fetch_xor
#define arch_atomic64_fetch_xor_acquire arch_atomic64_fetch_xor
#define arch_atomic64_fetch_xor_release arch_atomic64_fetch_xor
#define arch_atomic64_fetch_xor_relaxed arch_atomic64_fetch_xor_relaxed
#undef ATOMIC64_OPS
#undef ATOMIC64_FETCH_OP
#undef ATOMIC64_OP_RETURN
#undef ATOMIC64_OP
#endif
#endif /* _ASM_ATOMIC_AMO_H */