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