| Rich Felker | 00b73d8 | 2016-04-25 21:58:03 +0000 | [diff] [blame] | 1 | #ifndef __ASM_SH_FUTEX_LLSC_H |
| 2 | #define __ASM_SH_FUTEX_LLSC_H |
| 3 | |
| 4 | static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, |
| 5 | u32 __user *uaddr, |
| 6 | u32 oldval, u32 newval) |
| 7 | { |
| 8 | int err = 0; |
| 9 | __asm__ __volatile__( |
| 10 | "synco\n" |
| 11 | "1:\n\t" |
| 12 | "movli.l @%2, r0\n\t" |
| 13 | "mov r0, %1\n\t" |
| 14 | "cmp/eq %1, %4\n\t" |
| 15 | "bf 2f\n\t" |
| 16 | "mov %5, r0\n\t" |
| 17 | "movco.l r0, @%2\n\t" |
| 18 | "bf 1b\n" |
| 19 | "2:\n\t" |
| 20 | "synco\n\t" |
| 21 | #ifdef CONFIG_MMU |
| 22 | ".section .fixup,\"ax\"\n" |
| 23 | "3:\n\t" |
| 24 | "mov.l 4f, %0\n\t" |
| 25 | "jmp @%0\n\t" |
| 26 | " mov %3, %0\n\t" |
| 27 | ".balign 4\n" |
| 28 | "4: .long 2b\n\t" |
| 29 | ".previous\n" |
| 30 | ".section __ex_table,\"a\"\n\t" |
| 31 | ".long 1b, 3b\n\t" |
| 32 | ".previous" |
| 33 | #endif |
| 34 | :"+r" (err), "=&r" (*uval) |
| 35 | :"r" (uaddr), "i" (-EFAULT), "r" (oldval), "r" (newval) |
| 36 | :"t", "memory", "r0"); |
| 37 | if (err) return err; |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | #endif /* __ASM_SH_FUTEX_LLSC_H */ |