arch/sparc/include/asm/atomic_64.h

Source file repositories/reference/linux-study-clean/arch/sparc/include/asm/atomic_64.h

File Facts

System
Linux kernel
Corpus path
arch/sparc/include/asm/atomic_64.h
Extension
.h
Size
2280 bytes
Lines
74
Domain
Architecture Layer
Bucket
arch/sparc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __ARCH_SPARC64_ATOMIC__
#define __ARCH_SPARC64_ATOMIC__

#include <linux/types.h>
#include <asm/cmpxchg.h>
#include <asm/barrier.h>

#define ATOMIC64_INIT(i)	{ (i) }

#define arch_atomic_read(v)	READ_ONCE((v)->counter)
#define arch_atomic64_read(v)	READ_ONCE((v)->counter)

#define arch_atomic_set(v, i)	WRITE_ONCE(((v)->counter), (i))
#define arch_atomic64_set(v, i)	WRITE_ONCE(((v)->counter), (i))

#define ATOMIC_OP(op)							\
void arch_atomic_##op(int, atomic_t *);					\
void arch_atomic64_##op(s64, atomic64_t *);

#define ATOMIC_OP_RETURN(op)						\
int arch_atomic_##op##_return(int, atomic_t *);				\
s64 arch_atomic64_##op##_return(s64, atomic64_t *);

#define ATOMIC_FETCH_OP(op)						\
int arch_atomic_fetch_##op(int, atomic_t *);				\
s64 arch_atomic64_fetch_##op(s64, atomic64_t *);

#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)

ATOMIC_OPS(add)
ATOMIC_OPS(sub)

#define arch_atomic_add_return			arch_atomic_add_return
#define arch_atomic_sub_return			arch_atomic_sub_return
#define arch_atomic_fetch_add			arch_atomic_fetch_add
#define arch_atomic_fetch_sub			arch_atomic_fetch_sub

#define arch_atomic64_add_return		arch_atomic64_add_return
#define arch_atomic64_sub_return		arch_atomic64_sub_return
#define arch_atomic64_fetch_add			arch_atomic64_fetch_add
#define arch_atomic64_fetch_sub			arch_atomic64_fetch_sub

#undef ATOMIC_OPS
#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)

ATOMIC_OPS(and)
ATOMIC_OPS(or)
ATOMIC_OPS(xor)

#define arch_atomic_fetch_and			arch_atomic_fetch_and
#define arch_atomic_fetch_or			arch_atomic_fetch_or
#define arch_atomic_fetch_xor			arch_atomic_fetch_xor

#define arch_atomic64_fetch_and			arch_atomic64_fetch_and
#define arch_atomic64_fetch_or			arch_atomic64_fetch_or
#define arch_atomic64_fetch_xor			arch_atomic64_fetch_xor

#undef ATOMIC_OPS
#undef ATOMIC_FETCH_OP
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

s64 arch_atomic64_dec_if_positive(atomic64_t *v);
#define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive

#endif /* !(__ARCH_SPARC64_ATOMIC__) */

Annotation

Implementation Notes