summaryrefslogtreecommitdiff
path: root/arch/frv/include/asm/atomic.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/frv/include/asm/atomic.h')
-rw-r--r--arch/frv/include/asm/atomic.h224
1 files changed, 0 insertions, 224 deletions
diff --git a/arch/frv/include/asm/atomic.h b/arch/frv/include/asm/atomic.h
deleted file mode 100644
index e93c9494503a..000000000000
--- a/arch/frv/include/asm/atomic.h
+++ /dev/null
@@ -1,224 +0,0 @@
-/* atomic.h: atomic operation emulation for FR-V
- *
- * For an explanation of how atomic ops work in this arch, see:
- * Documentation/frv/atomic-ops.txt
- *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#ifndef _ASM_ATOMIC_H
-#define _ASM_ATOMIC_H
-
-#include <linux/types.h>
-#include <asm/cmpxchg.h>
-#include <asm/barrier.h>
-
-#ifdef CONFIG_SMP
-#error not SMP safe
-#endif
-
-#include <asm/atomic_defs.h>
-
-/*
- * Atomic operations that C can't guarantee us. Useful for
- * resource counting etc..
- *
- * We do not have SMP systems, so we don't have to deal with that.
- */
-
-#define ATOMIC_INIT(i) { (i) }
-#define atomic_read(v) READ_ONCE((v)->counter)
-#define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
-
-static inline int atomic_inc_return(atomic_t *v)
-{
- return __atomic_add_return(1, &v->counter);
-}
-
-static inline int atomic_dec_return(atomic_t *v)
-{
- return __atomic_sub_return(1, &v->counter);
-}
-
-static inline int atomic_add_return(int i, atomic_t *v)
-{
- return __atomic_add_return(i, &v->counter);
-}
-
-static inline int atomic_sub_return(int i, atomic_t *v)
-{
- return __atomic_sub_return(i, &v->counter);
-}
-
-static inline int atomic_add_negative(int i, atomic_t *v)
-{
- return atomic_add_return(i, v) < 0;
-}
-
-static inline void atomic_inc(atomic_t *v)
-{
- atomic_inc_return(v);
-}
-
-static inline void atomic_dec(atomic_t *v)
-{
- atomic_dec_return(v);
-}
-
-#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
-#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
-#define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0)
-
-/*
- * 64-bit atomic ops
- */
-typedef struct {
- long long counter;
-} atomic64_t;
-
-#define ATOMIC64_INIT(i) { (i) }
-
-static inline long long atomic64_read(const atomic64_t *v)
-{
- long long counter;
-
- asm("ldd%I1 %M1,%0"
- : "=e"(counter)
- : "m"(v->counter));
-
- return counter;
-}
-
-static inline void atomic64_set(atomic64_t *v, long long i)
-{
- asm volatile("std%I0 %1,%M0"
- : "=m"(v->counter)
- : "e"(i));
-}
-
-static inline long long atomic64_inc_return(atomic64_t *v)
-{
- return __atomic64_add_return(1, &v->counter);
-}
-
-static inline long long atomic64_dec_return(atomic64_t *v)
-{
- return __atomic64_sub_return(1, &v->counter);
-}
-
-static inline long long atomic64_add_return(long long i, atomic64_t *v)
-{
- return __atomic64_add_return(i, &v->counter);
-}
-
-static inline long long atomic64_sub_return(long long i, atomic64_t *v)
-{
- return __atomic64_sub_return(i, &v->counter);
-}
-
-static inline long long atomic64_add_negative(long long i, atomic64_t *v)
-{
- return atomic64_add_return(i, v) < 0;
-}
-
-static inline void atomic64_inc(atomic64_t *v)
-{
- atomic64_inc_return(v);
-}
-
-static inline void atomic64_dec(atomic64_t *v)
-{
- atomic64_dec_return(v);
-}
-
-#define atomic64_sub_and_test(i,v) (atomic64_sub_return((i), (v)) == 0)
-#define atomic64_dec_and_test(v) (atomic64_dec_return((v)) == 0)
-#define atomic64_inc_and_test(v) (atomic64_inc_return((v)) == 0)
-#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
-
-#define atomic_cmpxchg(v, old, new) (cmpxchg(&(v)->counter, old, new))
-#define atomic_xchg(v, new) (xchg(&(v)->counter, new))
-#define atomic64_cmpxchg(v, old, new) (__cmpxchg_64(old, new, &(v)->counter))
-#define atomic64_xchg(v, new) (__xchg_64(new, &(v)->counter))
-
-static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
-{
- int c, old;
- c = atomic_read(v);
- for (;;) {
- if (unlikely(c == (u)))
- break;
- old = atomic_cmpxchg((v), c, c + (a));
- if (likely(old == c))
- break;
- c = old;
- }
- return c;
-}
-
-static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u)
-{
- long long c, old;
-
- c = atomic64_read(v);
- for (;;) {
- if (unlikely(c == u))
- break;
- old = atomic64_cmpxchg(v, c, c + i);
- if (likely(old == c))
- break;
- c = old;
- }
- return c != u;
-}
-
-static inline long long atomic64_dec_if_positive(atomic64_t *v)
-{
- long long c, old, dec;
-
- c = atomic64_read(v);
- for (;;) {
- dec = c - 1;
- if (unlikely(dec < 0))
- break;
- old = atomic64_cmpxchg((v), c, dec);
- if (likely(old == c))
- break;
- c = old;
- }
- return dec;
-}
-
-#define ATOMIC_OP(op) \
-static inline int atomic_fetch_##op(int i, atomic_t *v) \
-{ \
- return __atomic32_fetch_##op(i, &v->counter); \
-} \
-static inline void atomic_##op(int i, atomic_t *v) \
-{ \
- (void)__atomic32_fetch_##op(i, &v->counter); \
-} \
- \
-static inline long long atomic64_fetch_##op(long long i, atomic64_t *v) \
-{ \
- return __atomic64_fetch_##op(i, &v->counter); \
-} \
-static inline void atomic64_##op(long long i, atomic64_t *v) \
-{ \
- (void)__atomic64_fetch_##op(i, &v->counter); \
-}
-
-ATOMIC_OP(or)
-ATOMIC_OP(and)
-ATOMIC_OP(xor)
-ATOMIC_OP(add)
-ATOMIC_OP(sub)
-
-#undef ATOMIC_OP
-
-#endif /* _ASM_ATOMIC_H */