53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
#ifndef __ASM_SH_CMPXCHG_LLSC_H
|
|
#define __ASM_SH_CMPXCHG_LLSC_H
|
|
|
|
static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
|
|
{
|
|
unsigned long retval;
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__ (
|
|
"1: \n\t"
|
|
"movli.l @%2, %0 ! xchg_u32 \n\t"
|
|
"mov %0, %1 \n\t"
|
|
"mov %3, %0 \n\t"
|
|
"movco.l %0, @%2 \n\t"
|
|
"bf 1b \n\t"
|
|
"synco \n\t"
|
|
: "=&z"(tmp), "=&r" (retval)
|
|
: "r" (m), "r" (val)
|
|
: "t", "memory"
|
|
);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static inline unsigned long
|
|
__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new)
|
|
{
|
|
unsigned long retval;
|
|
unsigned long tmp;
|
|
|
|
__asm__ __volatile__ (
|
|
"1: \n\t"
|
|
"movli.l @%2, %0 ! __cmpxchg_u32 \n\t"
|
|
"mov %0, %1 \n\t"
|
|
"cmp/eq %1, %3 \n\t"
|
|
"bf 2f \n\t"
|
|
"mov %4, %0 \n\t"
|
|
"2: \n\t"
|
|
"movco.l %0, @%2 \n\t"
|
|
"bf 1b \n\t"
|
|
"synco \n\t"
|
|
: "=&z" (tmp), "=&r" (retval)
|
|
: "r" (m), "r" (old), "r" (new)
|
|
: "t", "memory"
|
|
);
|
|
|
|
return retval;
|
|
}
|
|
|
|
#include <asm/cmpxchg-xchg.h>
|
|
|
|
#endif /* __ASM_SH_CMPXCHG_LLSC_H */
|