bitops.h File Reference

#include <asm/cpu-regs.h>
#include <asm-generic/bitops/lock.h>

Go to the source code of this file.

Macros
#define	smp_mb__before_clear_bit()   barrier()
#define	smp_mb__after_clear_bit()   barrier()
#define	__set_bit(nr, addr)
#define	set_bit(nr, addr)   __set_bit((nr), (addr))
#define	___clear_bit(nr, addr)
#define	clear_bit(nr, addr)   ___clear_bit((nr), (addr))
#define	__test_and_set_bit(nr, addr)
#define	test_and_set_bit(nr, addr)   __test_and_set_bit((nr), (addr))
#define	__test_and_clear_bit(nr, addr)
#define	test_and_clear_bit(nr, addr)   __test_and_clear_bit((nr), (addr))

Functions
void	change_bit (unsigned long nr, volatile void *addr)
int	test_and_change_bit (unsigned long nr, volatile void *addr)

Macro Definition Documentation

#define ___clear_bit	(		nr,
			addr
	)

Value:

({                              \
    volatile unsigned char *_a = (unsigned char *)(addr);   \
    const unsigned shift = (nr) & 7;            \
    _a += (nr) >> 3;                    \
                                \
    asm volatile("bclr %2,(%1) # clear_bit reg"     \
             : "=m"(*_a)                \
             : "a"(_a), "d"(1 << shift), "m"(*_a)   \
             : "memory", "cc");             \
})

Definition at line 45 of file bitops.h.

#define __set_bit	(		nr,
			addr
	)

Value:

({                              \
    volatile unsigned char *_a = (unsigned char *)(addr);   \
    const unsigned shift = (nr) & 7;            \
    _a += (nr) >> 3;                    \
                                \
    asm volatile("bset %2,(%1) # set_bit reg"       \
             : "=m"(*_a)                \
             : "a"(_a), "d"(1 << shift),  "m"(*_a)  \
             : "memory", "cc");             \
})

Definition at line 28 of file bitops.h.

#define __test_and_clear_bit	(		nr,
			addr
	)

Value:

({                              \
        volatile unsigned char *_a = (unsigned char *)(addr);   \
    const unsigned shift = (nr) & 7;            \
    unsigned epsw;                      \
    _a += (nr) >> 3;                    \
                                \
    asm volatile("bclr %3,(%2) # test_clear_bit reg\n"  \
             "mov epsw,%1"              \
             : "=m"(*_a), "=d"(epsw)            \
             : "a"(_a), "d"(1 << shift), "m"(*_a)   \
             : "memory", "cc");             \
                                \
    !(epsw & EPSW_FLAG_Z);                  \
})

Definition at line 117 of file bitops.h.

#define __test_and_set_bit	(		nr,
			addr
	)

Value:

({                              \
    volatile unsigned char *_a = (unsigned char *)(addr);   \
    const unsigned shift = (nr) & 7;            \
    unsigned epsw;                      \
    _a += (nr) >> 3;                    \
                                \
    asm volatile("bset %3,(%2) # test_set_bit reg\n"    \
             "mov epsw,%1"              \
             : "=m"(*_a), "=d"(epsw)            \
             : "a"(_a), "d"(1 << shift), "m"(*_a)   \
             : "memory", "cc");             \
                                \
    !(epsw & EPSW_FLAG_Z);                  \
})

Definition at line 96 of file bitops.h.

#define clear_bit	(		nr,
			addr
	)		___clear_bit((nr), (addr))

Definition at line 57 of file bitops.h.

#define set_bit	(		nr,
			addr
	)		__set_bit((nr), (addr))

Definition at line 40 of file bitops.h.

#define smp_mb__after_clear_bit

(

)

barrier()

Definition at line 23 of file bitops.h.

#define smp_mb__before_clear_bit

(

)

barrier()

Definition at line 22 of file bitops.h.

#define test_and_clear_bit	(		nr,
			addr
	)		__test_and_clear_bit((nr), (addr))

Definition at line 133 of file bitops.h.

#define test_and_set_bit	(		nr,
			addr
	)		__test_and_set_bit((nr), (addr))

Definition at line 112 of file bitops.h.

Function Documentation

void change_bit	(	unsigned long	nr,
		volatile void *	addr
	)

Definition at line 17 of file bitops.c.

int test_and_change_bit	(	unsigned long	nr,
		volatile void *	addr
	)

Definition at line 36 of file bitops.c.