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: 0x01_00_00_00
24 * Read lock(s): 0x00_FF_00_00 to say 0x01
25 * Write lock: 0x0, but only possible if prior value "unlocked" 0x0100_0000
28 volatile unsigned int counter;
29 arch_spinlock_t lock_mutex;
32 #define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000
33 #define __ARCH_RW_LOCK_UNLOCKED { .counter = __ARCH_RW_LOCK_UNLOCKED__ }