1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_CMPXCHG_CAS_H
3 #define __ASM_SH_CMPXCHG_CAS_H
4
5 static inline unsigned long
6 __cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new)
7 {
8 __asm__ __volatile__("cas.l %1,%0,@r0"
9 : "+r"(new)
10 : "r"(old), "z"(m)
11 : "t", "memory" );
12 return new;
13 }
14
15 static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
16 {
17 unsigned long old;
18 do old = *m;
19 while (__cmpxchg_u32(m, old, val) != old);
20 return old;
21 }
22
23 #include <asm/cmpxchg-xchg.h>
24
25 #endif /* __ASM_SH_CMPXCHG_CAS_H */
26
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