| Paul Mundt | ee43a84 | 2008-08-07 18:01:43 +0900 | [diff] [blame] | 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" |
| 11 | "movli.l @%1, %0 ! xchg_u32 \n\t" |
| 12 | "mov %0, %2 \n\t" |
| 13 | "mov %4, %0 \n\t" |
| 14 | "movco.l %0, @%1 \n\t" |
| 15 | "bf 1b \n\t" |
| 16 | "synco \n\t" |
| 17 | : "=&z"(tmp), "=r" (m), "=&r" (retval) |
| 18 | : "1" (m), "r" (val) |
| 19 | : "t", "memory" |
| 20 | ); |
| 21 | |
| 22 | return retval; |
| 23 | } |
| 24 | |
| 25 | static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) |
| 26 | { |
| 27 | unsigned long retval; |
| 28 | unsigned long tmp; |
| 29 | |
| 30 | __asm__ __volatile__ ( |
| 31 | "1: \n\t" |
| 32 | "movli.l @%1, %0 ! xchg_u8 \n\t" |
| 33 | "mov %0, %2 \n\t" |
| 34 | "mov %4, %0 \n\t" |
| 35 | "movco.l %0, @%1 \n\t" |
| 36 | "bf 1b \n\t" |
| 37 | "synco \n\t" |
| 38 | : "=&z"(tmp), "=r" (m), "=&r" (retval) |
| 39 | : "1" (m), "r" (val & 0xff) |
| 40 | : "t", "memory" |
| 41 | ); |
| 42 | |
| 43 | return retval; |
| 44 | } |
| 45 | |
| 46 | static inline unsigned long |
| 47 | __cmpxchg_u32(volatile int *m, unsigned long old, unsigned long new) |
| 48 | { |
| 49 | unsigned long retval; |
| 50 | unsigned long tmp; |
| 51 | |
| 52 | __asm__ __volatile__ ( |
| 53 | "1: \n\t" |
| 54 | "movli.l @%1, %0 ! __cmpxchg_u32 \n\t" |
| 55 | "mov %0, %2 \n\t" |
| 56 | "cmp/eq %2, %4 \n\t" |
| 57 | "bf 2f \n\t" |
| 58 | "mov %5, %0 \n\t" |
| 59 | "2: \n\t" |
| 60 | "movco.l %0, @%1 \n\t" |
| 61 | "bf 1b \n\t" |
| 62 | "synco \n\t" |
| 63 | : "=&z" (tmp), "=r" (m), "=&r" (retval) |
| 64 | : "1" (m), "r" (old), "r" (new) |
| 65 | : "t", "memory" |
| 66 | ); |
| 67 | |
| 68 | return retval; |
| 69 | } |
| 70 | |
| 71 | #endif /* __ASM_SH_CMPXCHG_LLSC_H */ |