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#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:
\t"
"movli.l @%2, %0 ! xchg_u32
\t"
"mov %0, %1
\t"
"mov %3, %0
\t"
"movco.l %0, @%2
\t"
"bf 1b
\t"
"synco
\t"
: "=&z"(tmp), "=&r" (retval)
: "r" (m), "r" (val)
: "t", "memory"
);
return retval;
}
static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
{
unsigned long retval;
unsigned long tmp;
__asm__ __volatile__ (
"1:
\t"
"movli.l @%2, %0 ! xchg_u8
\t"
"mov %0, %1
\t"
"mov %3, %0
\t"
"movco.l %0, @%2
\t"
"bf 1b
\t"
"synco
\t"
: "=&z"(tmp), "=&r" (retval)
: "r" (m), "r" (val & 0xff)
: "t", "memory"
);
return retval;
}
static inline unsigned long
__cmpxchg_u32(volatile int *m, unsigned long old, unsigned long new)
{
unsigned long retval;
unsigned long tmp;
__asm__ __volatile__ (
"1:
\t"
"movli.l @%2, %0 ! __cmpxchg_u32
\t"
"mov %0, %1
\t"
"cmp/eq %1, %3
\t"
"bf 2f
\t"
"mov %4, %0
\t"
"2:
\t"
"movco.l %0, @%2
\t"
"bf 1b
\t"
"synco
\t"
: "=&z" (tmp), "=&r" (retval)
: "r" (m), "r" (old), "r" (new)
: "t", "memory"
);
return retval;
}
#endif /* __ASM_SH_CMPXCHG_LLSC_H */
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