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-rw-r--r--arch/avr32/include/asm/atomic.h243
1 files changed, 0 insertions, 243 deletions
diff --git a/arch/avr32/include/asm/atomic.h b/arch/avr32/include/asm/atomic.h
deleted file mode 100644
index 3d5ce38a6f0b..000000000000
--- a/arch/avr32/include/asm/atomic.h
+++ /dev/null
@@ -1,243 +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 <linux/types.h>
-#include <asm/cmpxchg.h>
-
-#define ATOMIC_INIT(i) { (i) }
-
-#define atomic_read(v) READ_ONCE((v)->counter)
-#define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
-
-#define ATOMIC_OP_RETURN(op, asm_op, asm_con) \
-static inline int __atomic_##op##_return(int i, atomic_t *v) \
-{ \
- int result; \
- \
- asm volatile( \
- "/* atomic_" #op "_return */\n" \
- "1: ssrf 5\n" \
- " ld.w %0, %2\n" \
- " " #asm_op " %0, %3\n" \
- " stcond %1, %0\n" \
- " brne 1b" \
- : "=&r" (result), "=o" (v->counter) \
- : "m" (v->counter), #asm_con (i) \
- : "cc"); \
- \
- return result; \
-}
-
-#define ATOMIC_FETCH_OP(op, asm_op, asm_con) \
-static inline int __atomic_fetch_##op(int i, atomic_t *v) \
-{ \
- int result, val; \
- \
- asm volatile( \
- "/* atomic_fetch_" #op " */\n" \
- "1: ssrf 5\n" \
- " ld.w %0, %3\n" \
- " mov %1, %0\n" \
- " " #asm_op " %1, %4\n" \
- " stcond %2, %1\n" \
- " brne 1b" \
- : "=&r" (result), "=&r" (val), "=o" (v->counter) \
- : "m" (v->counter), #asm_con (i) \
- : "cc"); \
- \
- return result; \
-}
-
-ATOMIC_OP_RETURN(sub, sub, rKs21)
-ATOMIC_OP_RETURN(add, add, r)
-ATOMIC_FETCH_OP (sub, sub, rKs21)
-ATOMIC_FETCH_OP (add, add, r)
-
-#define ATOMIC_OPS(op, asm_op) \
-ATOMIC_OP_RETURN(op, asm_op, r) \
-static inline void atomic_##op(int i, atomic_t *v) \
-{ \
- (void)__atomic_##op##_return(i, v); \
-} \
-ATOMIC_FETCH_OP(op, asm_op, r) \
-static inline int atomic_fetch_##op(int i, atomic_t *v) \
-{ \
- return __atomic_fetch_##op(i, v); \
-}
-
-ATOMIC_OPS(and, and)
-ATOMIC_OPS(or, or)
-ATOMIC_OPS(xor, eor)
-
-#undef ATOMIC_OPS
-#undef ATOMIC_FETCH_OP
-#undef ATOMIC_OP_RETURN
-
-/*
- * Probably found the reason why we want to use sub with the signed 21-bit
- * limit, it uses one less register than the add instruction that can add up to
- * 32-bit values.
- *
- * Both instructions are 32-bit, to use a 16-bit instruction the immediate is
- * very small; 4 bit.
- *
- * sub 32-bit, type IV, takes a register and subtracts a 21-bit immediate.
- * add 32-bit, type II, adds two register values together.
- */
-#define IS_21BIT_CONST(i) \
- (__builtin_constant_p(i) && ((i) >= -1048575) && ((i) <= 1048576))
-
-/*
- * 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)
-{
- if (IS_21BIT_CONST(i))
- return __atomic_sub_return(-i, v);
-
- return __atomic_add_return(i, v);
-}
-
-static inline int atomic_fetch_add(int i, atomic_t *v)
-{
- if (IS_21BIT_CONST(i))
- return __atomic_fetch_sub(-i, v);
-
- return __atomic_fetch_add(i, v);
-}
-
-/*
- * 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)
-{
- if (IS_21BIT_CONST(i))
- return __atomic_sub_return(i, v);
-
- return __atomic_add_return(-i, v);
-}
-
-static inline int atomic_fetch_sub(int i, atomic_t *v)
-{
- if (IS_21BIT_CONST(i))
- return __atomic_fetch_sub(i, v);
-
- return __atomic_fetch_add(-i, v);
-}
-
-/*
- * __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.
- *
- * Atomically adds @a to @v, so long as it was not @u.
- * Returns the old value of @v.
-*/
-static inline int __atomic_add_unless(atomic_t *v, int a, int u)
-{
- int tmp, old = atomic_read(v);
-
- if (IS_21BIT_CONST(a)) {
- asm volatile(
- "/* __atomic_sub_unless */\n"
- "1: ssrf 5\n"
- " ld.w %0, %2\n"
- " cp.w %0, %4\n"
- " breq 1f\n"
- " sub %0, %3\n"
- " stcond %1, %0\n"
- " brne 1b\n"
- "1:"
- : "=&r"(tmp), "=o"(v->counter)
- : "m"(v->counter), "rKs21"(-a), "rKs21"(u)
- : "cc", "memory");
- } else {
- asm volatile(
- "/* __atomic_add_unless */\n"
- "1: ssrf 5\n"
- " ld.w %0, %2\n"
- " cp.w %0, %4\n"
- " breq 1f\n"
- " add %0, %3\n"
- " stcond %1, %0\n"
- " brne 1b\n"
- "1:"
- : "=&r"(tmp), "=o"(v->counter)
- : "m"(v->counter), "r"(a), "ir"(u)
- : "cc", "memory");
- }
-
- return old;
-}
-
-#undef IS_21BIT_CONST
-
-/*
- * 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_dec_if_positive(v) atomic_sub_if_positive(1, v)
-
-#endif /* __ASM_AVR32_ATOMIC_H */
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