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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef __ASM_SH_CMPXCHG_GRB_H |
| 3 | #define __ASM_SH_CMPXCHG_GRB_H |
| 4 | |
| 5 | static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) |
| 6 | { |
| 7 | unsigned long retval; |
| 8 | |
| 9 | __asm__ __volatile__ ( |
| 10 | " .align 2 \n\t" |
| 11 | " mova 1f, r0 \n\t" /* r0 = end point */ |
| 12 | " nop \n\t" |
| 13 | " mov r15, r1 \n\t" /* r1 = saved sp */ |
| 14 | " mov #-4, r15 \n\t" /* LOGIN */ |
| 15 | " mov.l @%1, %0 \n\t" /* load old value */ |
| 16 | " mov.l %2, @%1 \n\t" /* store new value */ |
| 17 | "1: mov r1, r15 \n\t" /* LOGOUT */ |
| 18 | : "=&r" (retval), |
| 19 | "+r" (m), |
| 20 | "+r" (val) /* inhibit r15 overloading */ |
| 21 | : |
| 22 | : "memory", "r0", "r1"); |
| 23 | |
| 24 | return retval; |
| 25 | } |
| 26 | |
| 27 | static inline unsigned long xchg_u16(volatile u16 *m, unsigned long val) |
| 28 | { |
| 29 | unsigned long retval; |
| 30 | |
| 31 | __asm__ __volatile__ ( |
| 32 | " .align 2 \n\t" |
| 33 | " mova 1f, r0 \n\t" /* r0 = end point */ |
| 34 | " mov r15, r1 \n\t" /* r1 = saved sp */ |
| 35 | " mov #-6, r15 \n\t" /* LOGIN */ |
| 36 | " mov.w @%1, %0 \n\t" /* load old value */ |
| 37 | " extu.w %0, %0 \n\t" /* extend as unsigned */ |
| 38 | " mov.w %2, @%1 \n\t" /* store new value */ |
| 39 | "1: mov r1, r15 \n\t" /* LOGOUT */ |
| 40 | : "=&r" (retval), |
| 41 | "+r" (m), |
| 42 | "+r" (val) /* inhibit r15 overloading */ |
| 43 | : |
| 44 | : "memory" , "r0", "r1"); |
| 45 | |
| 46 | return retval; |
| 47 | } |
| 48 | |
| 49 | static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) |
| 50 | { |
| 51 | unsigned long retval; |
| 52 | |
| 53 | __asm__ __volatile__ ( |
| 54 | " .align 2 \n\t" |
| 55 | " mova 1f, r0 \n\t" /* r0 = end point */ |
| 56 | " mov r15, r1 \n\t" /* r1 = saved sp */ |
| 57 | " mov #-6, r15 \n\t" /* LOGIN */ |
| 58 | " mov.b @%1, %0 \n\t" /* load old value */ |
| 59 | " extu.b %0, %0 \n\t" /* extend as unsigned */ |
| 60 | " mov.b %2, @%1 \n\t" /* store new value */ |
| 61 | "1: mov r1, r15 \n\t" /* LOGOUT */ |
| 62 | : "=&r" (retval), |
| 63 | "+r" (m), |
| 64 | "+r" (val) /* inhibit r15 overloading */ |
| 65 | : |
| 66 | : "memory" , "r0", "r1"); |
| 67 | |
| 68 | return retval; |
| 69 | } |
| 70 | |
| 71 | static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, |
| 72 | unsigned long new) |
| 73 | { |
| 74 | unsigned long retval; |
| 75 | |
| 76 | __asm__ __volatile__ ( |
| 77 | " .align 2 \n\t" |
| 78 | " mova 1f, r0 \n\t" /* r0 = end point */ |
| 79 | " nop \n\t" |
| 80 | " mov r15, r1 \n\t" /* r1 = saved sp */ |
| 81 | " mov #-8, r15 \n\t" /* LOGIN */ |
| 82 | " mov.l @%3, %0 \n\t" /* load old value */ |
| 83 | " cmp/eq %0, %1 \n\t" |
| 84 | " bf 1f \n\t" /* if not equal */ |
| 85 | " mov.l %2, @%3 \n\t" /* store new value */ |
| 86 | "1: mov r1, r15 \n\t" /* LOGOUT */ |
| 87 | : "=&r" (retval), |
| 88 | "+r" (old), "+r" (new) /* old or new can be r15 */ |
| 89 | : "r" (m) |
| 90 | : "memory" , "r0", "r1", "t"); |
| 91 | |
| 92 | return retval; |
| 93 | } |
| 94 | |
| 95 | #endif /* __ASM_SH_CMPXCHG_GRB_H */ |
| 96 |
Warning: This file is not a C or C++ file. It does not have highlighting.