summaryrefslogtreecommitdiffstats
path: root/arch/m32r/include/asm/atomic.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m32r/include/asm/atomic.h')
-rw-r--r--arch/m32r/include/asm/atomic.h275
1 files changed, 0 insertions, 275 deletions
diff --git a/arch/m32r/include/asm/atomic.h b/arch/m32r/include/asm/atomic.h
deleted file mode 100644
index 8bf67e55ff54..000000000000
--- a/arch/m32r/include/asm/atomic.h
+++ /dev/null
@@ -1,275 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M32R_ATOMIC_H
-#define _ASM_M32R_ATOMIC_H
-
-/*
- * linux/include/asm-m32r/atomic.h
- *
- * M32R version:
- * Copyright (C) 2001, 2002 Hitoshi Yamamoto
- * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
- */
-
-#include <linux/types.h>
-#include <asm/assembler.h>
-#include <asm/cmpxchg.h>
-#include <asm/dcache_clear.h>
-#include <asm/barrier.h>
-
-/*
- * Atomic operations that C can't guarantee us. Useful for
- * resource counting etc..
- */
-
-#define ATOMIC_INIT(i) { (i) }
-
-/**
- * atomic_read - read atomic variable
- * @v: pointer of type atomic_t
- *
- * Atomically reads the value of @v.
- */
-#define atomic_read(v) READ_ONCE((v)->counter)
-
-/**
- * atomic_set - set atomic variable
- * @v: pointer of type atomic_t
- * @i: required value
- *
- * Atomically sets the value of @v to @i.
- */
-#define atomic_set(v,i) WRITE_ONCE(((v)->counter), (i))
-
-#ifdef CONFIG_CHIP_M32700_TS1
-#define __ATOMIC_CLOBBER , "r4"
-#else
-#define __ATOMIC_CLOBBER
-#endif
-
-#define ATOMIC_OP(op) \
-static __inline__ void atomic_##op(int i, atomic_t *v) \
-{ \
- unsigned long flags; \
- int result; \
- \
- local_irq_save(flags); \
- __asm__ __volatile__ ( \
- "# atomic_" #op " \n\t" \
- DCACHE_CLEAR("%0", "r4", "%1") \
- M32R_LOCK" %0, @%1; \n\t" \
- #op " %0, %2; \n\t" \
- M32R_UNLOCK" %0, @%1; \n\t" \
- : "=&r" (result) \
- : "r" (&v->counter), "r" (i) \
- : "memory" \
- __ATOMIC_CLOBBER \
- ); \
- local_irq_restore(flags); \
-} \
-
-#define ATOMIC_OP_RETURN(op) \
-static __inline__ int atomic_##op##_return(int i, atomic_t *v) \
-{ \
- unsigned long flags; \
- int result; \
- \
- local_irq_save(flags); \
- __asm__ __volatile__ ( \
- "# atomic_" #op "_return \n\t" \
- DCACHE_CLEAR("%0", "r4", "%1") \
- M32R_LOCK" %0, @%1; \n\t" \
- #op " %0, %2; \n\t" \
- M32R_UNLOCK" %0, @%1; \n\t" \
- : "=&r" (result) \
- : "r" (&v->counter), "r" (i) \
- : "memory" \
- __ATOMIC_CLOBBER \
- ); \
- local_irq_restore(flags); \
- \
- return result; \
-}
-
-#define ATOMIC_FETCH_OP(op) \
-static __inline__ int atomic_fetch_##op(int i, atomic_t *v) \
-{ \
- unsigned long flags; \
- int result, val; \
- \
- local_irq_save(flags); \
- __asm__ __volatile__ ( \
- "# atomic_fetch_" #op " \n\t" \
- DCACHE_CLEAR("%0", "r4", "%2") \
- M32R_LOCK" %1, @%2; \n\t" \
- "mv %0, %1 \n\t" \
- #op " %1, %3; \n\t" \
- M32R_UNLOCK" %1, @%2; \n\t" \
- : "=&r" (result), "=&r" (val) \
- : "r" (&v->counter), "r" (i) \
- : "memory" \
- __ATOMIC_CLOBBER \
- ); \
- local_irq_restore(flags); \
- \
- return result; \
-}
-
-#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
-
-ATOMIC_OPS(add)
-ATOMIC_OPS(sub)
-
-#undef ATOMIC_OPS
-#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
-
-ATOMIC_OPS(and)
-ATOMIC_OPS(or)
-ATOMIC_OPS(xor)
-
-#undef ATOMIC_OPS
-#undef ATOMIC_FETCH_OP
-#undef ATOMIC_OP_RETURN
-#undef ATOMIC_OP
-
-/**
- * atomic_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically subtracts @i from @v and returns
- * true if the result is zero, or false for all
- * other cases.
- */
-#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
-
-/**
- * atomic_inc_return - increment atomic variable and return it
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1 and returns the result.
- */
-static __inline__ int atomic_inc_return(atomic_t *v)
-{
- unsigned long flags;
- int result;
-
- local_irq_save(flags);
- __asm__ __volatile__ (
- "# atomic_inc_return \n\t"
- DCACHE_CLEAR("%0", "r4", "%1")
- M32R_LOCK" %0, @%1; \n\t"
- "addi %0, #1; \n\t"
- M32R_UNLOCK" %0, @%1; \n\t"
- : "=&r" (result)
- : "r" (&v->counter)
- : "memory"
- __ATOMIC_CLOBBER
- );
- local_irq_restore(flags);
-
- return result;
-}
-
-/**
- * atomic_dec_return - decrement atomic variable and return it
- * @v: pointer of type atomic_t
- *
- * Atomically decrements @v by 1 and returns the result.
- */
-static __inline__ int atomic_dec_return(atomic_t *v)
-{
- unsigned long flags;
- int result;
-
- local_irq_save(flags);
- __asm__ __volatile__ (
- "# atomic_dec_return \n\t"
- DCACHE_CLEAR("%0", "r4", "%1")
- M32R_LOCK" %0, @%1; \n\t"
- "addi %0, #-1; \n\t"
- M32R_UNLOCK" %0, @%1; \n\t"
- : "=&r" (result)
- : "r" (&v->counter)
- : "memory"
- __ATOMIC_CLOBBER
- );
- local_irq_restore(flags);
-
- return result;
-}
-
-/**
- * atomic_inc - increment atomic variable
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1.
- */
-#define atomic_inc(v) ((void)atomic_inc_return(v))
-
-/**
- * atomic_dec - decrement atomic variable
- * @v: pointer of type atomic_t
- *
- * Atomically decrements @v by 1.
- */
-#define atomic_dec(v) ((void)atomic_dec_return(v))
-
-/**
- * atomic_inc_and_test - increment and test
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
-#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
-
-/**
- * atomic_dec_and_test - decrement and test
- * @v: pointer of type atomic_t
- *
- * Atomically decrements @v by 1 and
- * returns true if the result is 0, or false for all
- * other cases.
- */
-#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
-
-/**
- * atomic_add_negative - add and test if negative
- * @v: pointer of type atomic_t
- * @i: integer value to add
- *
- * Atomically adds @i to @v and returns true
- * if the result is negative, or false when
- * result is greater than or equal to zero.
- */
-#define atomic_add_negative(i,v) (atomic_add_return((i), (v)) < 0)
-
-#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
-#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
-
-/**
- * __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 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;
-}
-
-#endif /* _ASM_M32R_ATOMIC_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 06:17:15 +0000