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