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53 lines
1.1 KiB
53 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_SH_CMPXCHG_LLSC_H |
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#define __ASM_SH_CMPXCHG_LLSC_H |
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static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) |
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{ |
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unsigned long retval; |
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unsigned long tmp; |
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__asm__ __volatile__ ( |
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"1: \n\t" |
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"movli.l @%2, %0 ! xchg_u32 \n\t" |
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"mov %0, %1 \n\t" |
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"mov %3, %0 \n\t" |
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"movco.l %0, @%2 \n\t" |
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"bf 1b \n\t" |
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"synco \n\t" |
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: "=&z"(tmp), "=&r" (retval) |
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: "r" (m), "r" (val) |
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: "t", "memory" |
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); |
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return retval; |
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} |
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static inline unsigned long |
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__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new) |
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{ |
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unsigned long retval; |
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unsigned long tmp; |
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__asm__ __volatile__ ( |
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"1: \n\t" |
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"movli.l @%2, %0 ! __cmpxchg_u32 \n\t" |
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"mov %0, %1 \n\t" |
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"cmp/eq %1, %3 \n\t" |
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"bf 2f \n\t" |
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"mov %4, %0 \n\t" |
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"2: \n\t" |
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"movco.l %0, @%2 \n\t" |
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"bf 1b \n\t" |
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"synco \n\t" |
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: "=&z" (tmp), "=&r" (retval) |
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: "r" (m), "r" (old), "r" (new) |
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: "t", "memory" |
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); |
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return retval; |
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} |
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#include <asm/cmpxchg-xchg.h> |
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#endif /* __ASM_SH_CMPXCHG_LLSC_H */
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