1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __ASM_SH_ATOMIC_H 3*4882a593Smuzhiyun #define __ASM_SH_ATOMIC_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #if defined(CONFIG_CPU_J2) 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <asm-generic/atomic.h> 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #else 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun /* 12*4882a593Smuzhiyun * Atomic operations that C can't guarantee us. Useful for 13*4882a593Smuzhiyun * resource counting etc.. 14*4882a593Smuzhiyun * 15*4882a593Smuzhiyun */ 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #include <linux/compiler.h> 18*4882a593Smuzhiyun #include <linux/types.h> 19*4882a593Smuzhiyun #include <asm/cmpxchg.h> 20*4882a593Smuzhiyun #include <asm/barrier.h> 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #define atomic_read(v) READ_ONCE((v)->counter) 23*4882a593Smuzhiyun #define atomic_set(v,i) WRITE_ONCE((v)->counter, (i)) 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun #if defined(CONFIG_GUSA_RB) 26*4882a593Smuzhiyun #include <asm/atomic-grb.h> 27*4882a593Smuzhiyun #elif defined(CONFIG_CPU_SH4A) 28*4882a593Smuzhiyun #include <asm/atomic-llsc.h> 29*4882a593Smuzhiyun #else 30*4882a593Smuzhiyun #include <asm/atomic-irq.h> 31*4882a593Smuzhiyun #endif 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) 34*4882a593Smuzhiyun #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #endif /* CONFIG_CPU_J2 */ 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun #endif /* __ASM_SH_ATOMIC_H */ 39