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