arch/loongarch/include/asm/timex.h

Source file repositories/reference/linux-study-clean/arch/loongarch/include/asm/timex.h

File Facts

System
Linux kernel
Corpus path
arch/loongarch/include/asm/timex.h
Extension
.h
Size
837 bytes
Lines
58
Domain
Architecture Layer
Bucket
arch/loongarch
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_TIMEX_H
#define _ASM_TIMEX_H

#ifdef __KERNEL__

#include <linux/compiler.h>

#include <asm/cpu.h>
#include <asm/cpu-features.h>

typedef unsigned long cycles_t;

#define get_cycles get_cycles

static inline cycles_t get_cycles(void)
{
#ifdef CONFIG_32BIT
	return rdtime_l();
#else
	return rdtime_d();
#endif
}

#ifdef CONFIG_32BIT

#define get_cycles_hi get_cycles_hi

static inline cycles_t get_cycles_hi(void)
{
	return rdtime_h();
}

#endif

static inline u64 get_cycles64(void)
{
#ifdef CONFIG_32BIT
	u32 hi, lo;

	do {
		hi = rdtime_h();
		lo = rdtime_l();
	} while (hi != rdtime_h());

	return ((u64)hi << 32) | lo;
#else
	return rdtime_d();
#endif
}

#endif /* __KERNEL__ */

#endif /*  _ASM_TIMEX_H */

Annotation

Implementation Notes