cmpxchg_32.h File Reference

Go to the source code of this file.

Macros
#define	cmpxchg(ptr, o, n)
#define	cmpxchg_local(ptr, o, n)
#define	cmpxchg64(ptr, o, n)
#define	cmpxchg64_local(ptr, o, n)
#define	system_has_cmpxchg_double()   cpu_has_cx8

Functions
unsigned long	cmpxchg_386_u8 (volatile void *, u8, u8)
unsigned long	cmpxchg_386_u16 (volatile void *, u16, u16)
unsigned long	cmpxchg_386_u32 (volatile void *, u32, u32)

Macro Definition Documentation

#define cmpxchg	(		ptr,
			o,
			n
	)

Value:

({                                  \
    __typeof__(*(ptr)) __ret;                   \
    if (likely(boot_cpu_data.x86 > 3))              \
        __ret = (__typeof__(*(ptr)))__cmpxchg((ptr),        \
                (unsigned long)(o), (unsigned long)(n), \
                sizeof(*(ptr)));            \
    else                                \
        __ret = (__typeof__(*(ptr)))cmpxchg_386((ptr),      \
                (unsigned long)(o), (unsigned long)(n), \
                sizeof(*(ptr)));            \
    __ret;                              \
})

Definition at line 101 of file cmpxchg_32.h.

#define cmpxchg64	(		ptr,
			o,
			n
	)

Value:

({                              \
    __typeof__(*(ptr)) __ret;               \
    __typeof__(*(ptr)) __old = (o);             \
    __typeof__(*(ptr)) __new = (n);             \
    alternative_io(LOCK_PREFIX_HERE             \
            "call cmpxchg8b_emu",           \
            "lock; cmpxchg8b (%%esi)" ,     \
               X86_FEATURE_CX8,             \
               "=A" (__ret),                \
               "S" ((ptr)), "0" (__old),        \
               "b" ((unsigned int)__new),       \
               "c" ((unsigned int)(__new>>32))      \
               : "memory");             \
    __ret; })

Definition at line 135 of file cmpxchg_32.h.

#define cmpxchg64_local	(		ptr,
			o,
			n
	)

Value:

({                              \
    __typeof__(*(ptr)) __ret;               \
    __typeof__(*(ptr)) __old = (o);             \
    __typeof__(*(ptr)) __new = (n);             \
    alternative_io("call cmpxchg8b_emu",            \
               "cmpxchg8b (%%esi)" ,            \
               X86_FEATURE_CX8,             \
               "=A" (__ret),                \
               "S" ((ptr)), "0" (__old),        \
               "b" ((unsigned int)__new),       \
               "c" ((unsigned int)(__new>>32))      \
               : "memory");             \
    __ret; })

Definition at line 152 of file cmpxchg_32.h.

#define cmpxchg_local	(		ptr,
			o,
			n
	)

Value:

({                                  \
    __typeof__(*(ptr)) __ret;                   \
    if (likely(boot_cpu_data.x86 > 3))              \
        __ret = (__typeof__(*(ptr)))__cmpxchg_local((ptr),  \
                (unsigned long)(o), (unsigned long)(n), \
                sizeof(*(ptr)));            \
    else                                \
        __ret = (__typeof__(*(ptr)))cmpxchg_386((ptr),      \
                (unsigned long)(o), (unsigned long)(n), \
                sizeof(*(ptr)));            \
    __ret;                              \
})

Definition at line 114 of file cmpxchg_32.h.

#define system_has_cmpxchg_double

(

)

cpu_has_cx8

Definition at line 169 of file cmpxchg_32.h.

Function Documentation

unsigned long cmpxchg_386_u16	(	volatile void *	,
		u16	,
		u16
	)

Definition at line 25 of file cmpxchg.c.

unsigned long cmpxchg_386_u32	(	volatile void *	,
		u32	,
		u32
	)

Definition at line 40 of file cmpxchg.c.

unsigned long cmpxchg_386_u8	(	volatile void *	,
		u8	,
		u8
	)

Definition at line 10 of file cmpxchg.c.