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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 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" |
| 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" |
| 16 | "bf 1b \n\t" |
| 17 | "synco \n\t" |
| 18 | : "=&z"(tmp), "=&r" (retval) |
| 19 | : "r" (m), "r" (val) |
| 20 | : "t", "memory" |
| 21 | ); |
| 22 | |
| 23 | return retval; |
| 24 | } |
| 25 | |
| 26 | static inline unsigned long |
| 27 | __cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new) |
| 28 | { |
| 29 | unsigned long retval; |
| 30 | unsigned long tmp; |
| 31 | |
| 32 | __asm__ __volatile__ ( |
| 33 | "1: \n\t" |
| 34 | "movli.l @%2, %0 ! __cmpxchg_u32 \n\t" |
| 35 | "mov %0, %1 \n\t" |
| 36 | "cmp/eq %1, %3 \n\t" |
| 37 | "bf 2f \n\t" |
| 38 | "mov %4, %0 \n\t" |
| 39 | "2: \n\t" |
| 40 | "movco.l %0, @%2 \n\t" |
| 41 | "bf 1b \n\t" |
| 42 | "synco \n\t" |
| 43 | : "=&z" (tmp), "=&r" (retval) |
| 44 | : "r" (m), "r" (old), "r" (new) |
| 45 | : "t", "memory" |
| 46 | ); |
| 47 | |
| 48 | return retval; |
| 49 | } |
| 50 | |
| 51 | #include <asm/cmpxchg-xchg.h> |
| 52 | |
| 53 | #endif /* __ASM_SH_CMPXCHG_LLSC_H */ |
| 54 |
Warning: This file is not a C or C++ file. It does not have highlighting.