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