arch/arm64/include/asm/lse.h

Source file repositories/reference/linux-study-clean/arch/arm64/include/asm/lse.h

File Facts

System
Linux kernel
Corpus path
arch/arm64/include/asm/lse.h
Extension
.h
Size
715 bytes
Lines
29
Domain
Architecture Layer
Bucket
arch/arm64
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 __ASM_LSE_H
#define __ASM_LSE_H

#include <asm/atomic_ll_sc.h>

#define __LSE_PREAMBLE	".arch_extension lse\n"

#include <linux/compiler_types.h>
#include <linux/export.h>
#include <linux/stringify.h>
#include <asm/alternative.h>
#include <asm/alternative-macros.h>
#include <asm/atomic_lse.h>
#include <asm/cpucaps.h>

#define __lse_ll_sc_body(op, ...)					\
({									\
	alternative_has_cap_likely(ARM64_HAS_LSE_ATOMICS) ?		\
		__lse_##op(__VA_ARGS__) :				\
		__ll_sc_##op(__VA_ARGS__);				\
})

/* In-line patching at runtime */
#define ARM64_LSE_ATOMIC_INSN(llsc, lse)				\
	ALTERNATIVE(llsc, __LSE_PREAMBLE lse, ARM64_HAS_LSE_ATOMICS)

#endif	/* __ASM_LSE_H */

Annotation

Implementation Notes