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