| Stuart Menefy | 1efe4ce | 2007-11-30 16:12:36 +0900 | [diff] [blame] | 1 | #ifndef __ASM_SH_CMPXCHG_GRB_H |
| 2 | #define __ASM_SH_CMPXCHG_GRB_H |
| 3 | |
| 4 | static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) |
| 5 | { |
| 6 | unsigned long retval; |
| 7 | |
| 8 | __asm__ __volatile__ ( |
| 9 | " .align 2 \n\t" |
| 10 | " mova 1f, r0 \n\t" /* r0 = end point */ |
| 11 | " nop \n\t" |
| 12 | " mov r15, r1 \n\t" /* r1 = saved sp */ |
| 13 | " mov #-4, r15 \n\t" /* LOGIN */ |
| 14 | " mov.l @%1, %0 \n\t" /* load old value */ |
| 15 | " mov.l %2, @%1 \n\t" /* store new value */ |
| 16 | "1: mov r1, r15 \n\t" /* LOGOUT */ |
| 17 | : "=&r" (retval), |
| Srinivas KANDAGATLA | 5bdbd4f | 2011-06-08 15:22:39 +0900 | [diff] [blame] | 18 | "+r" (m), |
| 19 | "+r" (val) /* inhibit r15 overloading */ |
| 20 | : |
| Stuart Menefy | 1efe4ce | 2007-11-30 16:12:36 +0900 | [diff] [blame] | 21 | : "memory", "r0", "r1"); |
| 22 | |
| 23 | return retval; |
| 24 | } |
| 25 | |
| 26 | static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) |
| 27 | { |
| 28 | unsigned long retval; |
| 29 | |
| 30 | __asm__ __volatile__ ( |
| 31 | " .align 2 \n\t" |
| 32 | " mova 1f, r0 \n\t" /* r0 = end point */ |
| 33 | " mov r15, r1 \n\t" /* r1 = saved sp */ |
| 34 | " mov #-6, r15 \n\t" /* LOGIN */ |
| 35 | " mov.b @%1, %0 \n\t" /* load old value */ |
| 36 | " extu.b %0, %0 \n\t" /* extend as unsigned */ |
| 37 | " mov.b %2, @%1 \n\t" /* store new value */ |
| 38 | "1: mov r1, r15 \n\t" /* LOGOUT */ |
| 39 | : "=&r" (retval), |
| Srinivas KANDAGATLA | 5bdbd4f | 2011-06-08 15:22:39 +0900 | [diff] [blame] | 40 | "+r" (m), |
| 41 | "+r" (val) /* inhibit r15 overloading */ |
| 42 | : |
| Stuart Menefy | 1efe4ce | 2007-11-30 16:12:36 +0900 | [diff] [blame] | 43 | : "memory" , "r0", "r1"); |
| 44 | |
| 45 | return retval; |
| 46 | } |
| 47 | |
| 48 | static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, |
| 49 | unsigned long new) |
| 50 | { |
| 51 | unsigned long retval; |
| 52 | |
| 53 | __asm__ __volatile__ ( |
| 54 | " .align 2 \n\t" |
| 55 | " mova 1f, r0 \n\t" /* r0 = end point */ |
| 56 | " nop \n\t" |
| 57 | " mov r15, r1 \n\t" /* r1 = saved sp */ |
| 58 | " mov #-8, r15 \n\t" /* LOGIN */ |
| Srinivas KANDAGATLA | 5bdbd4f | 2011-06-08 15:22:39 +0900 | [diff] [blame] | 59 | " mov.l @%3, %0 \n\t" /* load old value */ |
| 60 | " cmp/eq %0, %1 \n\t" |
| Stuart Menefy | 1efe4ce | 2007-11-30 16:12:36 +0900 | [diff] [blame] | 61 | " bf 1f \n\t" /* if not equal */ |
| Srinivas KANDAGATLA | 5bdbd4f | 2011-06-08 15:22:39 +0900 | [diff] [blame] | 62 | " mov.l %2, @%3 \n\t" /* store new value */ |
| Stuart Menefy | 1efe4ce | 2007-11-30 16:12:36 +0900 | [diff] [blame] | 63 | "1: mov r1, r15 \n\t" /* LOGOUT */ |
| Srinivas KANDAGATLA | 5bdbd4f | 2011-06-08 15:22:39 +0900 | [diff] [blame] | 64 | : "=&r" (retval), |
| 65 | "+r" (old), "+r" (new) /* old or new can be r15 */ |
| 66 | : "r" (m) |
| Stuart Menefy | 1efe4ce | 2007-11-30 16:12:36 +0900 | [diff] [blame] | 67 | : "memory" , "r0", "r1", "t"); |
| 68 | |
| 69 | return retval; |
| 70 | } |
| 71 | |
| 72 | #endif /* __ASM_SH_CMPXCHG_GRB_H */ |