diff options
Diffstat (limited to 'arch/frv/include/asm/atomic.h')
| -rw-r--r-- | arch/frv/include/asm/atomic.h | 224 |
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 e93c9494503ac..0000000000000 --- 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 */ |