1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_SH_ATOMIC_H 3 #define __ASM_SH_ATOMIC_H 4 5 #if defined(CONFIG_CPU_J2) 6 7 #include <asm-generic/atomic.h> 8 9 #else 10 11 /* 12 * Atomic operations that C can't guarantee us. Useful for 13 * resource counting etc.. 14 * 15 */ 16 17 #include <linux/compiler.h> 18 #include <linux/types.h> 19 #include <asm/cmpxchg.h> 20 #include <asm/barrier.h> 21 22 #define arch_atomic_read(v) READ_ONCE((v)->counter) 23 #define arch_atomic_set(v,i) WRITE_ONCE((v)->counter, (i)) 24 25 #if defined(CONFIG_GUSA_RB) 26 #include <asm/atomic-grb.h> 27 #elif defined(CONFIG_CPU_SH4A) 28 #include <asm/atomic-llsc.h> 29 #else 30 #include <asm/atomic-irq.h> 31 #endif 32 33 #define arch_atomic_xchg(v, new) (arch_xchg(&((v)->counter), new)) 34 #define arch_atomic_cmpxchg(v, o, n) (arch_cmpxchg(&((v)->counter), (o), (n))) 35 36 #endif /* CONFIG_CPU_J2 */ 37 38 #endif /* __ASM_SH_ATOMIC_H */ 39