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95 lines
2.8 KiB
95 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_SH_CMPXCHG_GRB_H |
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#define __ASM_SH_CMPXCHG_GRB_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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__asm__ __volatile__ ( |
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" .align 2 \n\t" |
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" mova 1f, r0 \n\t" /* r0 = end point */ |
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" nop \n\t" |
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" mov r15, r1 \n\t" /* r1 = saved sp */ |
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" mov #-4, r15 \n\t" /* LOGIN */ |
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" mov.l @%1, %0 \n\t" /* load old value */ |
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" mov.l %2, @%1 \n\t" /* store new value */ |
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"1: mov r1, r15 \n\t" /* LOGOUT */ |
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: "=&r" (retval), |
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"+r" (m), |
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"+r" (val) /* inhibit r15 overloading */ |
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: |
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: "memory", "r0", "r1"); |
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return retval; |
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} |
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static inline unsigned long xchg_u16(volatile u16 *m, unsigned long val) |
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{ |
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unsigned long retval; |
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__asm__ __volatile__ ( |
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" .align 2 \n\t" |
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" mova 1f, r0 \n\t" /* r0 = end point */ |
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" mov r15, r1 \n\t" /* r1 = saved sp */ |
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" mov #-6, r15 \n\t" /* LOGIN */ |
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" mov.w @%1, %0 \n\t" /* load old value */ |
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" extu.w %0, %0 \n\t" /* extend as unsigned */ |
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" mov.w %2, @%1 \n\t" /* store new value */ |
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"1: mov r1, r15 \n\t" /* LOGOUT */ |
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: "=&r" (retval), |
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"+r" (m), |
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"+r" (val) /* inhibit r15 overloading */ |
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: |
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: "memory" , "r0", "r1"); |
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return retval; |
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} |
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static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) |
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{ |
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unsigned long retval; |
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__asm__ __volatile__ ( |
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" .align 2 \n\t" |
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" mova 1f, r0 \n\t" /* r0 = end point */ |
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" mov r15, r1 \n\t" /* r1 = saved sp */ |
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" mov #-6, r15 \n\t" /* LOGIN */ |
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" mov.b @%1, %0 \n\t" /* load old value */ |
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" extu.b %0, %0 \n\t" /* extend as unsigned */ |
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" mov.b %2, @%1 \n\t" /* store new value */ |
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"1: mov r1, r15 \n\t" /* LOGOUT */ |
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: "=&r" (retval), |
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"+r" (m), |
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"+r" (val) /* inhibit r15 overloading */ |
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: |
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: "memory" , "r0", "r1"); |
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return retval; |
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} |
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static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, |
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unsigned long new) |
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{ |
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unsigned long retval; |
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__asm__ __volatile__ ( |
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" .align 2 \n\t" |
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" mova 1f, r0 \n\t" /* r0 = end point */ |
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" nop \n\t" |
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" mov r15, r1 \n\t" /* r1 = saved sp */ |
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" mov #-8, r15 \n\t" /* LOGIN */ |
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" mov.l @%3, %0 \n\t" /* load old value */ |
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" cmp/eq %0, %1 \n\t" |
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" bf 1f \n\t" /* if not equal */ |
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" mov.l %2, @%3 \n\t" /* store new value */ |
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"1: mov r1, r15 \n\t" /* LOGOUT */ |
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: "=&r" (retval), |
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"+r" (old), "+r" (new) /* old or new can be r15 */ |
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: "r" (m) |
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: "memory" , "r0", "r1", "t"); |
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return retval; |
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} |
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#endif /* __ASM_SH_CMPXCHG_GRB_H */
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