2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef __ASM_SPINLOCK_TYPES_H
10 #define __ASM_SPINLOCK_TYPES_H
13 volatile unsigned int slock;
16 #define __ARCH_SPIN_LOCK_UNLOCKED__ 0
17 #define __ARCH_SPIN_LOCK_LOCKED__ 1
19 #define __ARCH_SPIN_LOCK_UNLOCKED { __ARCH_SPIN_LOCK_UNLOCKED__ }
20 #define __ARCH_SPIN_LOCK_LOCKED { __ARCH_SPIN_LOCK_LOCKED__ }
23 * Unlocked : 0x0100_0000
24 * Read lock(s) : 0x00FF_FFFF to 0x01 (Multiple Readers decrement it)
25 * Write lock : 0x0, but only if prior value is "unlocked" 0x0100_0000
28 volatile unsigned int counter;
29 #ifndef CONFIG_ARC_HAS_LLSC
30 arch_spinlock_t lock_mutex;
34 #define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000
35 #define __ARCH_RW_LOCK_UNLOCKED { .counter = __ARCH_RW_LOCK_UNLOCKED__ }