18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef __ASM_SH_BITOPS_CAS_H 38c2ecf20Sopenharmony_ci#define __ASM_SH_BITOPS_CAS_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_cistatic inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new) 68c2ecf20Sopenharmony_ci{ 78c2ecf20Sopenharmony_ci __asm__ __volatile__("cas.l %1,%0,@r0" 88c2ecf20Sopenharmony_ci : "+r"(new) 98c2ecf20Sopenharmony_ci : "r"(old), "z"(p) 108c2ecf20Sopenharmony_ci : "t", "memory" ); 118c2ecf20Sopenharmony_ci return new; 128c2ecf20Sopenharmony_ci} 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_cistatic inline void set_bit(int nr, volatile void *addr) 158c2ecf20Sopenharmony_ci{ 168c2ecf20Sopenharmony_ci unsigned mask, old; 178c2ecf20Sopenharmony_ci volatile unsigned *a = addr; 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci a += nr >> 5; 208c2ecf20Sopenharmony_ci mask = 1U << (nr & 0x1f); 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci do old = *a; 238c2ecf20Sopenharmony_ci while (__bo_cas(a, old, old|mask) != old); 248c2ecf20Sopenharmony_ci} 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_cistatic inline void clear_bit(int nr, volatile void *addr) 278c2ecf20Sopenharmony_ci{ 288c2ecf20Sopenharmony_ci unsigned mask, old; 298c2ecf20Sopenharmony_ci volatile unsigned *a = addr; 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci a += nr >> 5; 328c2ecf20Sopenharmony_ci mask = 1U << (nr & 0x1f); 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci do old = *a; 358c2ecf20Sopenharmony_ci while (__bo_cas(a, old, old&~mask) != old); 368c2ecf20Sopenharmony_ci} 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_cistatic inline void change_bit(int nr, volatile void *addr) 398c2ecf20Sopenharmony_ci{ 408c2ecf20Sopenharmony_ci unsigned mask, old; 418c2ecf20Sopenharmony_ci volatile unsigned *a = addr; 428c2ecf20Sopenharmony_ci 438c2ecf20Sopenharmony_ci a += nr >> 5; 448c2ecf20Sopenharmony_ci mask = 1U << (nr & 0x1f); 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ci do old = *a; 478c2ecf20Sopenharmony_ci while (__bo_cas(a, old, old^mask) != old); 488c2ecf20Sopenharmony_ci} 498c2ecf20Sopenharmony_ci 508c2ecf20Sopenharmony_cistatic inline int test_and_set_bit(int nr, volatile void *addr) 518c2ecf20Sopenharmony_ci{ 528c2ecf20Sopenharmony_ci unsigned mask, old; 538c2ecf20Sopenharmony_ci volatile unsigned *a = addr; 548c2ecf20Sopenharmony_ci 558c2ecf20Sopenharmony_ci a += nr >> 5; 568c2ecf20Sopenharmony_ci mask = 1U << (nr & 0x1f); 578c2ecf20Sopenharmony_ci 588c2ecf20Sopenharmony_ci do old = *a; 598c2ecf20Sopenharmony_ci while (__bo_cas(a, old, old|mask) != old); 608c2ecf20Sopenharmony_ci 618c2ecf20Sopenharmony_ci return !!(old & mask); 628c2ecf20Sopenharmony_ci} 638c2ecf20Sopenharmony_ci 648c2ecf20Sopenharmony_cistatic inline int test_and_clear_bit(int nr, volatile void *addr) 658c2ecf20Sopenharmony_ci{ 668c2ecf20Sopenharmony_ci unsigned mask, old; 678c2ecf20Sopenharmony_ci volatile unsigned *a = addr; 688c2ecf20Sopenharmony_ci 698c2ecf20Sopenharmony_ci a += nr >> 5; 708c2ecf20Sopenharmony_ci mask = 1U << (nr & 0x1f); 718c2ecf20Sopenharmony_ci 728c2ecf20Sopenharmony_ci do old = *a; 738c2ecf20Sopenharmony_ci while (__bo_cas(a, old, old&~mask) != old); 748c2ecf20Sopenharmony_ci 758c2ecf20Sopenharmony_ci return !!(old & mask); 768c2ecf20Sopenharmony_ci} 778c2ecf20Sopenharmony_ci 788c2ecf20Sopenharmony_cistatic inline int test_and_change_bit(int nr, volatile void *addr) 798c2ecf20Sopenharmony_ci{ 808c2ecf20Sopenharmony_ci unsigned mask, old; 818c2ecf20Sopenharmony_ci volatile unsigned *a = addr; 828c2ecf20Sopenharmony_ci 838c2ecf20Sopenharmony_ci a += nr >> 5; 848c2ecf20Sopenharmony_ci mask = 1U << (nr & 0x1f); 858c2ecf20Sopenharmony_ci 868c2ecf20Sopenharmony_ci do old = *a; 878c2ecf20Sopenharmony_ci while (__bo_cas(a, old, old^mask) != old); 888c2ecf20Sopenharmony_ci 898c2ecf20Sopenharmony_ci return !!(old & mask); 908c2ecf20Sopenharmony_ci} 918c2ecf20Sopenharmony_ci 928c2ecf20Sopenharmony_ci#include <asm-generic/bitops/non-atomic.h> 938c2ecf20Sopenharmony_ci 948c2ecf20Sopenharmony_ci#endif /* __ASM_SH_BITOPS_CAS_H */ 95