arch/sparc/include/asm/bitops_64.h

Source file repositories/reference/linux-study-clean/arch/sparc/include/asm/bitops_64.h

File Facts

System
Linux kernel
Corpus path
arch/sparc/include/asm/bitops_64.h
Extension
.h
Size
1717 bytes
Lines
64
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 _SPARC64_BITOPS_H
#define _SPARC64_BITOPS_H

#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif

#include <linux/compiler.h>
#include <asm/byteorder.h>
#include <asm/barrier.h>

int test_and_set_bit(unsigned long nr, volatile unsigned long *addr);
int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr);
int test_and_change_bit(unsigned long nr, volatile unsigned long *addr);
void set_bit(unsigned long nr, volatile unsigned long *addr);
void clear_bit(unsigned long nr, volatile unsigned long *addr);
void change_bit(unsigned long nr, volatile unsigned long *addr);

int __attribute_const__ fls(unsigned int word);
int __attribute_const__ __fls(unsigned long word);

#include <asm-generic/bitops/non-atomic.h>

#include <asm-generic/bitops/fls64.h>

#ifdef __KERNEL__

int __attribute_const__ ffs(int x);
unsigned long __attribute_const__ __ffs(unsigned long);

#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/sched.h>

/*
 * hweightN: returns the hamming weight (i.e. the number
 * of bits set) of a N-bit word
 */

unsigned long __arch_hweight64(__u64 w);
unsigned int __arch_hweight32(unsigned int w);
unsigned int __arch_hweight16(unsigned int w);
unsigned int __arch_hweight8(unsigned int w);

#include <asm-generic/bitops/const_hweight.h>
#include <asm-generic/bitops/lock.h>
#endif /* __KERNEL__ */

#ifdef __KERNEL__

#include <asm-generic/bitops/le.h>

#include <asm-generic/bitops/ext2-atomic-setbit.h>

#endif /* __KERNEL__ */

#endif /* defined(_SPARC64_BITOPS_H) */

Annotation

Implementation Notes