projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ee43a844 PM |
2 | #ifndef __ASM_SH_CMPXCHG_LLSC_H |
| 3 | #define __ASM_SH_CMPXCHG_LLSC_H | |
| 4 | ||
| 5 | static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) | |
| 6 | { | |
| 7 | unsigned long retval; | |
| 8 | unsigned long tmp; | |
| 9 | ||
| 10 | __asm__ __volatile__ ( | |
| 11 | "1: \n\t" | |
| 42990701 MF |
12 | "movli.l @%2, %0 ! xchg_u32 \n\t" |
| 13 | "mov %0, %1 \n\t" | |
| 14 | "mov %3, %0 \n\t" | |
| 15 | "movco.l %0, @%2 \n\t" | |
| ee43a844 PM |
16 | "bf 1b \n\t" |
| 17 | "synco \n\t" | |
| 42990701 MF |
18 | : "=&z"(tmp), "=&r" (retval) |
| 19 | : "r" (m), "r" (val) | |
| ee43a844 PM |
20 | : "t", "memory" |
| 21 | ); | |
| 22 | ||
| 23 | return retval; | |
| 24 | } | |
| 25 | ||
| ee43a844 | 26 | static inline unsigned long |
| 3226aad8 | 27 | __cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new) |
| ee43a844 PM |
28 | { |
| 29 | unsigned long retval; | |
| 30 | unsigned long tmp; | |
| 31 | ||
| 32 | __asm__ __volatile__ ( | |
| 33 | "1: \n\t" | |
| 42990701 MF |
34 | "movli.l @%2, %0 ! __cmpxchg_u32 \n\t" |
| 35 | "mov %0, %1 \n\t" | |
| 36 | "cmp/eq %1, %3 \n\t" | |
| ee43a844 | 37 | "bf 2f \n\t" |
| 4c7c9978 | 38 | "mov %4, %0 \n\t" |
| ee43a844 | 39 | "2: \n\t" |
| 42990701 | 40 | "movco.l %0, @%2 \n\t" |
| ee43a844 PM |
41 | "bf 1b \n\t" |
| 42 | "synco \n\t" | |
| 42990701 MF |
43 | : "=&z" (tmp), "=&r" (retval) |
| 44 | : "r" (m), "r" (old), "r" (new) | |
| ee43a844 PM |
45 | : "t", "memory" |
| 46 | ); | |
| 47 | ||
| 48 | return retval; | |
| 49 | } | |
| 50 | ||
| 9e3f84ce | 51 | #include <asm/cmpxchg-xchg.h> |
| 3226aad8 | 52 | |
| ee43a844 | 53 | #endif /* __ASM_SH_CMPXCHG_LLSC_H */ |