1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_SH_FUTEX_LLSC_H
3#define __ASM_SH_FUTEX_LLSC_H
4
5static 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