18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef __ASM_SH_FUTEX_LLSC_H 38c2ecf20Sopenharmony_ci#define __ASM_SH_FUTEX_LLSC_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_cistatic inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, 68c2ecf20Sopenharmony_ci u32 __user *uaddr, 78c2ecf20Sopenharmony_ci u32 oldval, u32 newval) 88c2ecf20Sopenharmony_ci{ 98c2ecf20Sopenharmony_ci int err = 0; 108c2ecf20Sopenharmony_ci __asm__ __volatile__( 118c2ecf20Sopenharmony_ci "synco\n" 128c2ecf20Sopenharmony_ci "1:\n\t" 138c2ecf20Sopenharmony_ci "movli.l @%2, r0\n\t" 148c2ecf20Sopenharmony_ci "mov r0, %1\n\t" 158c2ecf20Sopenharmony_ci "cmp/eq %1, %4\n\t" 168c2ecf20Sopenharmony_ci "bf 2f\n\t" 178c2ecf20Sopenharmony_ci "mov %5, r0\n\t" 188c2ecf20Sopenharmony_ci "movco.l r0, @%2\n\t" 198c2ecf20Sopenharmony_ci "bf 1b\n" 208c2ecf20Sopenharmony_ci "2:\n\t" 218c2ecf20Sopenharmony_ci "synco\n\t" 228c2ecf20Sopenharmony_ci#ifdef CONFIG_MMU 238c2ecf20Sopenharmony_ci ".section .fixup,\"ax\"\n" 248c2ecf20Sopenharmony_ci "3:\n\t" 258c2ecf20Sopenharmony_ci "mov.l 4f, %0\n\t" 268c2ecf20Sopenharmony_ci "jmp @%0\n\t" 278c2ecf20Sopenharmony_ci " mov %3, %0\n\t" 288c2ecf20Sopenharmony_ci ".balign 4\n" 298c2ecf20Sopenharmony_ci "4: .long 2b\n\t" 308c2ecf20Sopenharmony_ci ".previous\n" 318c2ecf20Sopenharmony_ci ".section __ex_table,\"a\"\n\t" 328c2ecf20Sopenharmony_ci ".long 1b, 3b\n\t" 338c2ecf20Sopenharmony_ci ".previous" 348c2ecf20Sopenharmony_ci#endif 358c2ecf20Sopenharmony_ci :"+r" (err), "=&r" (*uval) 368c2ecf20Sopenharmony_ci :"r" (uaddr), "i" (-EFAULT), "r" (oldval), "r" (newval) 378c2ecf20Sopenharmony_ci :"t", "memory", "r0"); 388c2ecf20Sopenharmony_ci if (err) return err; 398c2ecf20Sopenharmony_ci return 0; 408c2ecf20Sopenharmony_ci} 418c2ecf20Sopenharmony_ci 428c2ecf20Sopenharmony_ci#endif /* __ASM_SH_FUTEX_LLSC_H */ 43