/*
* Copyright (C) 2001-2004 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __ia32_ATOMIC_H__
#define __ia32_ATOMIC_H__
#include <arch/types.h>
typedef volatile __u32 atomic_t;
static inline void atomic_inc(atomic_t *val) {
#ifdef CONFIG_SMP
__asm__ volatile ("lock incl %0\n" : "=m" (*val));
#else
__asm__ volatile ("incl %0\n" : "=m" (*val));
#endif /* CONFIG_SMP */
}
static inline void atomic_dec(atomic_t *val) {
#ifdef CONFIG_SMP
__asm__ volatile ("lock decl %0\n" : "=m" (*val));
#else
__asm__ volatile ("decl %0\n" : "=m" (*val));
#endif /* CONFIG_SMP */
}
static inline int test_and_set(volatile int *val) {
int v;
__asm__ volatile (
"movl $1, %0\n"
"xchgl %0, %1\n"
: "=r" (v),"=m" (*val)
);
return v;
}
extern void spinlock_arch(volatile int *val);
#endif