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authorHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-08-05 13:35:07 +0200
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-08-05 13:35:07 +0200
commit84db8d7cdb072866f5a6c6ac2c9a74c5c48dd22f (patch)
tree7f10cc33bca606abd1547ae90d90362134a35332 /include/asm-avr32/atomic.h
parent2b12a4c524812fb3f6ee590a02e65b95c8c32229 (diff)
downloadlinux-84db8d7cdb072866f5a6c6ac2c9a74c5c48dd22f.tar.bz2
avr32: Move include/asm-avr32 to arch/avr32/include/asm
Leaving include/asm/arch alone for now. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'include/asm-avr32/atomic.h')
-rw-r--r--include/asm-avr32/atomic.h201
1 files changed, 0 insertions, 201 deletions
diff --git a/include/asm-avr32/atomic.h b/include/asm-avr32/atomic.h
deleted file mode 100644
index 7ef3862a73d0..000000000000
--- a/include/asm-avr32/atomic.h
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * Atomic operations that C can't guarantee us. Useful for
- * resource counting etc.
- *
- * But use these as seldom as possible since they are slower than
- * regular operations.
- *
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __ASM_AVR32_ATOMIC_H
-#define __ASM_AVR32_ATOMIC_H
-
-#include <asm/system.h>
-
-typedef struct { volatile int counter; } atomic_t;
-#define ATOMIC_INIT(i) { (i) }
-
-#define atomic_read(v) ((v)->counter)
-#define atomic_set(v, i) (((v)->counter) = i)
-
-/*
- * atomic_sub_return - subtract the atomic variable
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically subtracts @i from @v. Returns the resulting value.
- */
-static inline int atomic_sub_return(int i, atomic_t *v)
-{
- int result;
-
- asm volatile(
- "/* atomic_sub_return */\n"
- "1: ssrf 5\n"
- " ld.w %0, %2\n"
- " sub %0, %3\n"
- " stcond %1, %0\n"
- " brne 1b"
- : "=&r"(result), "=o"(v->counter)
- : "m"(v->counter), "rKs21"(i)
- : "cc");
-
- return result;
-}
-
-/*
- * atomic_add_return - add integer to atomic variable
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v. Returns the resulting value.
- */
-static inline int atomic_add_return(int i, atomic_t *v)
-{
- int result;
-
- if (__builtin_constant_p(i) && (i >= -1048575) && (i <= 1048576))
- result = atomic_sub_return(-i, v);
- else
- asm volatile(
- "/* atomic_add_return */\n"
- "1: ssrf 5\n"
- " ld.w %0, %1\n"
- " add %0, %3\n"
- " stcond %2, %0\n"
- " brne 1b"
- : "=&r"(result), "=o"(v->counter)
- : "m"(v->counter), "r"(i)
- : "cc", "memory");
-
- return result;
-}
-
-/*
- * atomic_sub_unless - sub unless the number is a given value
- * @v: pointer of type atomic_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * If the atomic value v is not equal to u, this function subtracts a
- * from v, and returns non zero. If v is equal to u then it returns
- * zero. This is done as an atomic operation.
-*/
-static inline int atomic_sub_unless(atomic_t *v, int a, int u)
-{
- int tmp, result = 0;
-
- asm volatile(
- "/* atomic_sub_unless */\n"
- "1: ssrf 5\n"
- " ld.w %0, %3\n"
- " cp.w %0, %5\n"
- " breq 1f\n"
- " sub %0, %4\n"
- " stcond %2, %0\n"
- " brne 1b\n"
- " mov %1, 1\n"
- "1:"
- : "=&r"(tmp), "=&r"(result), "=o"(v->counter)
- : "m"(v->counter), "rKs21"(a), "rKs21"(u), "1"(result)
- : "cc", "memory");
-
- return result;
-}
-
-/*
- * atomic_add_unless - add unless the number is a given value
- * @v: pointer of type atomic_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * If the atomic value v is not equal to u, this function adds a to v,
- * and returns non zero. If v is equal to u then it returns zero. This
- * is done as an atomic operation.
-*/
-static inline int atomic_add_unless(atomic_t *v, int a, int u)
-{
- int tmp, result;
-
- if (__builtin_constant_p(a) && (a >= -1048575) && (a <= 1048576))
- result = atomic_sub_unless(v, -a, u);
- else {
- result = 0;
- asm volatile(
- "/* atomic_add_unless */\n"
- "1: ssrf 5\n"
- " ld.w %0, %3\n"
- " cp.w %0, %5\n"
- " breq 1f\n"
- " add %0, %4\n"
- " stcond %2, %0\n"
- " brne 1b\n"
- " mov %1, 1\n"
- "1:"
- : "=&r"(tmp), "=&r"(result), "=o"(v->counter)
- : "m"(v->counter), "r"(a), "ir"(u), "1"(result)
- : "cc", "memory");
- }
-
- return result;
-}
-
-/*
- * atomic_sub_if_positive - conditionally subtract integer from atomic variable
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically test @v and subtract @i if @v is greater or equal than @i.
- * The function returns the old value of @v minus @i.
- */
-static inline int atomic_sub_if_positive(int i, atomic_t *v)
-{
- int result;
-
- asm volatile(
- "/* atomic_sub_if_positive */\n"
- "1: ssrf 5\n"
- " ld.w %0, %2\n"
- " sub %0, %3\n"
- " brlt 1f\n"
- " stcond %1, %0\n"
- " brne 1b\n"
- "1:"
- : "=&r"(result), "=o"(v->counter)
- : "m"(v->counter), "ir"(i)
- : "cc", "memory");
-
- return result;
-}
-
-#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
-#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
-
-#define atomic_sub(i, v) (void)atomic_sub_return(i, v)
-#define atomic_add(i, v) (void)atomic_add_return(i, v)
-#define atomic_dec(v) atomic_sub(1, (v))
-#define atomic_inc(v) atomic_add(1, (v))
-
-#define atomic_dec_return(v) atomic_sub_return(1, v)
-#define atomic_inc_return(v) atomic_add_return(1, v)
-
-#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
-#define atomic_inc_and_test(v) (atomic_add_return(1, v) == 0)
-#define atomic_dec_and_test(v) (atomic_sub_return(1, v) == 0)
-#define atomic_add_negative(i, v) (atomic_add_return(i, v) < 0)
-
-#define atomic_inc_not_zero(v) atomic_add_unless(v, 1, 0)
-#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
-
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
-#include <asm-generic/atomic.h>
-
-#endif /* __ASM_AVR32_ATOMIC_H */