1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef __ASM_SH_CMPXCHG_LLSC_H
3 #define __ASM_SH_CMPXCHG_LLSC_H
4
5 static inline unsigned long xchg_u32(volatile
6 {
7 unsigned long retval;
8 unsigned long tmp;
9
10 __asm__ __volatile__ (
11 "1:
12 "movli.l @%2, %0 ! xchg
13 "mov %0, %1
14 "mov %3, %0
15 "movco.l %0, @%2
16 "bf 1b
17 "synco
18 : "=&z"(tmp), "=&r" (retval)
19 : "r" (m), "r" (val)
20 : "t", "memory"
21 );
22
23 return retval;
24 }
25
26 static inline unsigned long
27 __cmpxchg_u32(volatile u32 *m, unsigned long o
28 {
29 unsigned long retval;
30 unsigned long tmp;
31
32 __asm__ __volatile__ (
33 "1:
34 "movli.l @%2, %0 ! __cm
35 "mov %0, %1
36 "cmp/eq %1, %3
37 "bf 2f
38 "mov %4, %0
39 "2:
40 "movco.l %0, @%2
41 "bf 1b
42 "synco
43 : "=&z" (tmp), "=&r" (retval)
44 : "r" (m), "r" (old), "r" (new
45 : "t", "memory"
46 );
47
48 return retval;
49 }
50
51 #include <asm/cmpxchg-xchg.h>
52
53 #endif /* __ASM_SH_CMPXCHG_LLSC_H */
54
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