atomic.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright IBM Corp. 1999, 2016
  4 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
  5 *	      Denis Joseph Barrow,
  6 *	      Arnd Bergmann,
  7 */
  8
  9#ifndef __ARCH_S390_ATOMIC__
 10#define __ARCH_S390_ATOMIC__
 11
 12#include <linux/compiler.h>
 13#include <linux/types.h>
 14#include <asm/atomic_ops.h>
 15#include <asm/barrier.h>
 16#include <asm/cmpxchg.h>
 17
 18static __always_inline int arch_atomic_read(const atomic_t *v)
 19{
 20	return __atomic_read(&v->counter);
 21}
 22#define arch_atomic_read arch_atomic_read
 23
 24static __always_inline void arch_atomic_set(atomic_t *v, int i)
 25{
 26	__atomic_set(&v->counter, i);
 27}
 28#define arch_atomic_set arch_atomic_set
 29
 30static __always_inline int arch_atomic_add_return(int i, atomic_t *v)
 31{
 32	return __atomic_add_barrier(i, &v->counter) + i;
 33}
 34#define arch_atomic_add_return arch_atomic_add_return
 35
 36static __always_inline int arch_atomic_fetch_add(int i, atomic_t *v)
 37{
 38	return __atomic_add_barrier(i, &v->counter);
 39}
 40#define arch_atomic_fetch_add arch_atomic_fetch_add
 41
 42static __always_inline void arch_atomic_add(int i, atomic_t *v)
 43{
 44	__atomic_add(i, &v->counter);
 45}
 46#define arch_atomic_add arch_atomic_add
 47
 48static __always_inline void arch_atomic_inc(atomic_t *v)
 49{
 50	__atomic_add_const(1, &v->counter);
 51}
 52#define arch_atomic_inc arch_atomic_inc
 53
 54static __always_inline void arch_atomic_dec(atomic_t *v)
 55{
 56	__atomic_add_const(-1, &v->counter);
 57}
 58#define arch_atomic_dec arch_atomic_dec
 59
 60static __always_inline bool arch_atomic_sub_and_test(int i, atomic_t *v)
 61{
 62	return __atomic_add_and_test_barrier(-i, &v->counter);
 63}
 64#define arch_atomic_sub_and_test arch_atomic_sub_and_test
 65
 66static __always_inline bool arch_atomic_dec_and_test(atomic_t *v)
 67{
 68	return __atomic_add_const_and_test_barrier(-1, &v->counter);
 69}
 70#define arch_atomic_dec_and_test arch_atomic_dec_and_test
 71
 72static __always_inline bool arch_atomic_inc_and_test(atomic_t *v)
 73{
 74	return __atomic_add_const_and_test_barrier(1, &v->counter);
 75}
 76#define arch_atomic_inc_and_test arch_atomic_inc_and_test
 77
 78#define arch_atomic_sub(_i, _v)		arch_atomic_add(-(int)(_i), _v)
 79#define arch_atomic_sub_return(_i, _v)	arch_atomic_add_return(-(int)(_i), _v)
 80#define arch_atomic_fetch_sub(_i, _v)	arch_atomic_fetch_add(-(int)(_i), _v)
 81
 82#define ATOMIC_OPS(op)							\
 83static __always_inline void arch_atomic_##op(int i, atomic_t *v)	\
 84{									\
 85	__atomic_##op(i, &v->counter);					\
 86}									\
 87static __always_inline int arch_atomic_fetch_##op(int i, atomic_t *v)	\
 88{									\
 89	return __atomic_##op##_barrier(i, &v->counter);			\
 90}
 91
 92ATOMIC_OPS(and)
 93ATOMIC_OPS(or)
 94ATOMIC_OPS(xor)
 95
 96#undef ATOMIC_OPS
 97
 98#define arch_atomic_and			arch_atomic_and
 99#define arch_atomic_or			arch_atomic_or
100#define arch_atomic_xor			arch_atomic_xor
101#define arch_atomic_fetch_and		arch_atomic_fetch_and
102#define arch_atomic_fetch_or		arch_atomic_fetch_or
103#define arch_atomic_fetch_xor		arch_atomic_fetch_xor
104
105static __always_inline int arch_atomic_xchg(atomic_t *v, int new)
106{
107	return arch_xchg(&v->counter, new);
108}
109#define arch_atomic_xchg arch_atomic_xchg
110
111static __always_inline int arch_atomic_cmpxchg(atomic_t *v, int old, int new)
112{
113	return arch_cmpxchg(&v->counter, old, new);
114}
115#define arch_atomic_cmpxchg arch_atomic_cmpxchg
116
117static __always_inline bool arch_atomic_try_cmpxchg(atomic_t *v, int *old, int new)
118{
119	return arch_try_cmpxchg(&v->counter, old, new);
120}
121#define arch_atomic_try_cmpxchg arch_atomic_try_cmpxchg
122
123#define ATOMIC64_INIT(i)  { (i) }
124
125static __always_inline s64 arch_atomic64_read(const atomic64_t *v)
126{
127	return __atomic64_read((long *)&v->counter);
128}
129#define arch_atomic64_read arch_atomic64_read
130
131static __always_inline void arch_atomic64_set(atomic64_t *v, s64 i)
132{
133	__atomic64_set((long *)&v->counter, i);
134}
135#define arch_atomic64_set arch_atomic64_set
136
137static __always_inline s64 arch_atomic64_add_return(s64 i, atomic64_t *v)
138{
139	return __atomic64_add_barrier(i, (long *)&v->counter) + i;
140}
141#define arch_atomic64_add_return arch_atomic64_add_return
142
143static __always_inline s64 arch_atomic64_fetch_add(s64 i, atomic64_t *v)
144{
145	return __atomic64_add_barrier(i, (long *)&v->counter);
146}
147#define arch_atomic64_fetch_add arch_atomic64_fetch_add
148
149static __always_inline void arch_atomic64_add(s64 i, atomic64_t *v)
150{
151	__atomic64_add(i, (long *)&v->counter);
152}
153#define arch_atomic64_add arch_atomic64_add
154
155static __always_inline void arch_atomic64_inc(atomic64_t *v)
156{
157	__atomic64_add_const(1, (long *)&v->counter);
158}
159#define arch_atomic64_inc arch_atomic64_inc
160
161static __always_inline void arch_atomic64_dec(atomic64_t *v)
162{
163	__atomic64_add_const(-1, (long *)&v->counter);
164}
165#define arch_atomic64_dec arch_atomic64_dec
166
167static __always_inline bool arch_atomic64_sub_and_test(s64 i, atomic64_t *v)
168{
169	return __atomic64_add_and_test_barrier(-i, (long *)&v->counter);
170}
171#define arch_atomic64_sub_and_test arch_atomic64_sub_and_test
172
173static __always_inline bool arch_atomic64_dec_and_test(atomic64_t *v)
174{
175	return __atomic64_add_const_and_test_barrier(-1, (long *)&v->counter);
176}
177#define arch_atomic64_dec_and_test arch_atomic64_dec_and_test
178
179static __always_inline bool arch_atomic64_inc_and_test(atomic64_t *v)
180{
181	return __atomic64_add_const_and_test_barrier(1, (long *)&v->counter);
182}
183#define arch_atomic64_inc_and_test arch_atomic64_inc_and_test
184
185static __always_inline s64 arch_atomic64_xchg(atomic64_t *v, s64 new)
186{
187	return arch_xchg(&v->counter, new);
188}
189#define arch_atomic64_xchg arch_atomic64_xchg
190
191static __always_inline s64 arch_atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new)
192{
193	return arch_cmpxchg(&v->counter, old, new);
194}
195#define arch_atomic64_cmpxchg arch_atomic64_cmpxchg
196
197static __always_inline bool arch_atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new)
198{
199	return arch_try_cmpxchg(&v->counter, old, new);
200}
201#define arch_atomic64_try_cmpxchg arch_atomic64_try_cmpxchg
202
203#define ATOMIC64_OPS(op)							\
204static __always_inline void arch_atomic64_##op(s64 i, atomic64_t *v)		\
205{										\
206	__atomic64_##op(i, (long *)&v->counter);				\
207}										\
208static __always_inline long arch_atomic64_fetch_##op(s64 i, atomic64_t *v)	\
209{										\
210	return __atomic64_##op##_barrier(i, (long *)&v->counter);		\
211}
212
213ATOMIC64_OPS(and)
214ATOMIC64_OPS(or)
215ATOMIC64_OPS(xor)
216
217#undef ATOMIC64_OPS
218
219#define arch_atomic64_and		arch_atomic64_and
220#define arch_atomic64_or		arch_atomic64_or
221#define arch_atomic64_xor		arch_atomic64_xor
222#define arch_atomic64_fetch_and		arch_atomic64_fetch_and
223#define arch_atomic64_fetch_or		arch_atomic64_fetch_or
224#define arch_atomic64_fetch_xor		arch_atomic64_fetch_xor
225
226#define arch_atomic64_sub_return(_i, _v) arch_atomic64_add_return(-(s64)(_i), _v)
227#define arch_atomic64_fetch_sub(_i, _v)  arch_atomic64_fetch_add(-(s64)(_i), _v)
228#define arch_atomic64_sub(_i, _v)	 arch_atomic64_add(-(s64)(_i), _v)
229
230#endif /* __ARCH_S390_ATOMIC__  */