Release 4.14 arch/arc/include/asm/spinlock_types.h

/*
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 *
 * 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_SPINLOCK_TYPES_H

#define __ASM_SPINLOCK_TYPES_H

typedef struct {
	
volatile unsigned int slock;

} arch_spinlock_t;


#define __ARCH_SPIN_LOCK_UNLOCKED__	0

#define __ARCH_SPIN_LOCK_LOCKED__	1


#define __ARCH_SPIN_LOCK_UNLOCKED	{ __ARCH_SPIN_LOCK_UNLOCKED__ }

#define __ARCH_SPIN_LOCK_LOCKED		{ __ARCH_SPIN_LOCK_LOCKED__ }

/*
 * Unlocked     : 0x0100_0000
 * Read lock(s) : 0x00FF_FFFF to 0x01  (Multiple Readers decrement it)
 * Write lock   : 0x0, but only if prior value is "unlocked" 0x0100_0000
 */
typedef struct {
	
volatile unsigned int	counter;
#ifndef CONFIG_ARC_HAS_LLSC
	
arch_spinlock_t		lock_mutex;
#endif

} arch_rwlock_t;


#define __ARCH_RW_LOCK_UNLOCKED__	0x01000000

#define __ARCH_RW_LOCK_UNLOCKED		{ .counter = __ARCH_RW_LOCK_UNLOCKED__ }

#endif
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Directory: arch/arc/include/asm

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