1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_FUTEX_LLSC_H
3 #define __ASM_SH_FUTEX_LLSC_H
4 
atomic_futex_op_cmpxchg_inatomic(u32 * uval,u32 __user * uaddr,u32 oldval,u32 newval)5 static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
6 						   u32 __user *uaddr,
7 						   u32 oldval, u32 newval)
8 {
9 	int err = 0;
10 	__asm__ __volatile__(
11 		"synco\n"
12 		"1:\n\t"
13 		"movli.l	@%2, r0\n\t"
14 		"mov	r0, %1\n\t"
15 		"cmp/eq	%1, %4\n\t"
16 		"bf	2f\n\t"
17 		"mov	%5, r0\n\t"
18 		"movco.l	r0, @%2\n\t"
19 		"bf	1b\n"
20 		"2:\n\t"
21 		"synco\n\t"
22 #ifdef CONFIG_MMU
23 		".section	.fixup,\"ax\"\n"
24 		"3:\n\t"
25 		"mov.l	4f, %0\n\t"
26 		"jmp	@%0\n\t"
27 		" mov	%3, %0\n\t"
28 		".balign	4\n"
29 		"4:	.long	2b\n\t"
30 		".previous\n"
31 		".section	__ex_table,\"a\"\n\t"
32 		".long	1b, 3b\n\t"
33 		".previous"
34 #endif
35 		:"+r" (err), "=&r" (*uval)
36 		:"r" (uaddr), "i" (-EFAULT), "r" (oldval), "r" (newval)
37 		:"t", "memory", "r0");
38 	if (err) return err;
39 	return 0;
40 }
41 
42 #endif /* __ASM_SH_FUTEX_LLSC_H */
43