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94 lines
1.7 KiB
94 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_SH_BITOPS_CAS_H |
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#define __ASM_SH_BITOPS_CAS_H |
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static inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new) |
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{ |
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__asm__ __volatile__("cas.l %1,%0,@r0" |
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: "+r"(new) |
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: "r"(old), "z"(p) |
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: "t", "memory" ); |
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return new; |
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} |
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static inline void set_bit(int nr, volatile void *addr) |
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{ |
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unsigned mask, old; |
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volatile unsigned *a = addr; |
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a += nr >> 5; |
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mask = 1U << (nr & 0x1f); |
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do old = *a; |
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while (__bo_cas(a, old, old|mask) != old); |
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} |
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static inline void clear_bit(int nr, volatile void *addr) |
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{ |
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unsigned mask, old; |
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volatile unsigned *a = addr; |
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a += nr >> 5; |
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mask = 1U << (nr & 0x1f); |
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do old = *a; |
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while (__bo_cas(a, old, old&~mask) != old); |
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} |
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static inline void change_bit(int nr, volatile void *addr) |
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{ |
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unsigned mask, old; |
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volatile unsigned *a = addr; |
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a += nr >> 5; |
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mask = 1U << (nr & 0x1f); |
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do old = *a; |
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while (__bo_cas(a, old, old^mask) != old); |
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} |
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static inline int test_and_set_bit(int nr, volatile void *addr) |
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{ |
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unsigned mask, old; |
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volatile unsigned *a = addr; |
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a += nr >> 5; |
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mask = 1U << (nr & 0x1f); |
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do old = *a; |
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while (__bo_cas(a, old, old|mask) != old); |
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return !!(old & mask); |
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} |
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static inline int test_and_clear_bit(int nr, volatile void *addr) |
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{ |
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unsigned mask, old; |
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volatile unsigned *a = addr; |
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a += nr >> 5; |
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mask = 1U << (nr & 0x1f); |
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do old = *a; |
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while (__bo_cas(a, old, old&~mask) != old); |
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return !!(old & mask); |
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} |
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static inline int test_and_change_bit(int nr, volatile void *addr) |
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{ |
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unsigned mask, old; |
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volatile unsigned *a = addr; |
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a += nr >> 5; |
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mask = 1U << (nr & 0x1f); |
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do old = *a; |
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while (__bo_cas(a, old, old^mask) != old); |
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return !!(old & mask); |
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} |
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#include <asm-generic/bitops/non-atomic.h> |
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#endif /* __ASM_SH_BITOPS_CAS_H */
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