162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef __ASM_SH_BITOPS_CAS_H 362306a36Sopenharmony_ci#define __ASM_SH_BITOPS_CAS_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_cistatic inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new) 662306a36Sopenharmony_ci{ 762306a36Sopenharmony_ci __asm__ __volatile__("cas.l %1,%0,@r0" 862306a36Sopenharmony_ci : "+r"(new) 962306a36Sopenharmony_ci : "r"(old), "z"(p) 1062306a36Sopenharmony_ci : "t", "memory" ); 1162306a36Sopenharmony_ci return new; 1262306a36Sopenharmony_ci} 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_cistatic inline void set_bit(int nr, volatile void *addr) 1562306a36Sopenharmony_ci{ 1662306a36Sopenharmony_ci unsigned mask, old; 1762306a36Sopenharmony_ci volatile unsigned *a = addr; 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci a += nr >> 5; 2062306a36Sopenharmony_ci mask = 1U << (nr & 0x1f); 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci do old = *a; 2362306a36Sopenharmony_ci while (__bo_cas(a, old, old|mask) != old); 2462306a36Sopenharmony_ci} 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_cistatic inline void clear_bit(int nr, volatile void *addr) 2762306a36Sopenharmony_ci{ 2862306a36Sopenharmony_ci unsigned mask, old; 2962306a36Sopenharmony_ci volatile unsigned *a = addr; 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci a += nr >> 5; 3262306a36Sopenharmony_ci mask = 1U << (nr & 0x1f); 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci do old = *a; 3562306a36Sopenharmony_ci while (__bo_cas(a, old, old&~mask) != old); 3662306a36Sopenharmony_ci} 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_cistatic inline void change_bit(int nr, volatile void *addr) 3962306a36Sopenharmony_ci{ 4062306a36Sopenharmony_ci unsigned mask, old; 4162306a36Sopenharmony_ci volatile unsigned *a = addr; 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ci a += nr >> 5; 4462306a36Sopenharmony_ci mask = 1U << (nr & 0x1f); 4562306a36Sopenharmony_ci 4662306a36Sopenharmony_ci do old = *a; 4762306a36Sopenharmony_ci while (__bo_cas(a, old, old^mask) != old); 4862306a36Sopenharmony_ci} 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_cistatic inline int test_and_set_bit(int nr, volatile void *addr) 5162306a36Sopenharmony_ci{ 5262306a36Sopenharmony_ci unsigned mask, old; 5362306a36Sopenharmony_ci volatile unsigned *a = addr; 5462306a36Sopenharmony_ci 5562306a36Sopenharmony_ci a += nr >> 5; 5662306a36Sopenharmony_ci mask = 1U << (nr & 0x1f); 5762306a36Sopenharmony_ci 5862306a36Sopenharmony_ci do old = *a; 5962306a36Sopenharmony_ci while (__bo_cas(a, old, old|mask) != old); 6062306a36Sopenharmony_ci 6162306a36Sopenharmony_ci return !!(old & mask); 6262306a36Sopenharmony_ci} 6362306a36Sopenharmony_ci 6462306a36Sopenharmony_cistatic inline int test_and_clear_bit(int nr, volatile void *addr) 6562306a36Sopenharmony_ci{ 6662306a36Sopenharmony_ci unsigned mask, old; 6762306a36Sopenharmony_ci volatile unsigned *a = addr; 6862306a36Sopenharmony_ci 6962306a36Sopenharmony_ci a += nr >> 5; 7062306a36Sopenharmony_ci mask = 1U << (nr & 0x1f); 7162306a36Sopenharmony_ci 7262306a36Sopenharmony_ci do old = *a; 7362306a36Sopenharmony_ci while (__bo_cas(a, old, old&~mask) != old); 7462306a36Sopenharmony_ci 7562306a36Sopenharmony_ci return !!(old & mask); 7662306a36Sopenharmony_ci} 7762306a36Sopenharmony_ci 7862306a36Sopenharmony_cistatic inline int test_and_change_bit(int nr, volatile void *addr) 7962306a36Sopenharmony_ci{ 8062306a36Sopenharmony_ci unsigned mask, old; 8162306a36Sopenharmony_ci volatile unsigned *a = addr; 8262306a36Sopenharmony_ci 8362306a36Sopenharmony_ci a += nr >> 5; 8462306a36Sopenharmony_ci mask = 1U << (nr & 0x1f); 8562306a36Sopenharmony_ci 8662306a36Sopenharmony_ci do old = *a; 8762306a36Sopenharmony_ci while (__bo_cas(a, old, old^mask) != old); 8862306a36Sopenharmony_ci 8962306a36Sopenharmony_ci return !!(old & mask); 9062306a36Sopenharmony_ci} 9162306a36Sopenharmony_ci 9262306a36Sopenharmony_ci#include <asm-generic/bitops/non-atomic.h> 9362306a36Sopenharmony_ci 9462306a36Sopenharmony_ci#endif /* __ASM_SH_BITOPS_CAS_H */ 95