1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __ASM_SH_CMPXCHG_CAS_H
3*4882a593Smuzhiyun #define __ASM_SH_CMPXCHG_CAS_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun static inline unsigned long
__cmpxchg_u32(volatile u32 * m,unsigned long old,unsigned long new)6*4882a593Smuzhiyun __cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new)
7*4882a593Smuzhiyun {
8*4882a593Smuzhiyun __asm__ __volatile__("cas.l %1,%0,@r0"
9*4882a593Smuzhiyun : "+r"(new)
10*4882a593Smuzhiyun : "r"(old), "z"(m)
11*4882a593Smuzhiyun : "t", "memory" );
12*4882a593Smuzhiyun return new;
13*4882a593Smuzhiyun }
14*4882a593Smuzhiyun
xchg_u32(volatile u32 * m,unsigned long val)15*4882a593Smuzhiyun static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun unsigned long old;
18*4882a593Smuzhiyun do old = *m;
19*4882a593Smuzhiyun while (__cmpxchg_u32(m, old, val) != old);
20*4882a593Smuzhiyun return old;
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include <asm/cmpxchg-xchg.h>
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun #endif /* __ASM_SH_CMPXCHG_CAS_H */
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