1 /* 2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 3 * 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. 7 */ 8 9 #ifndef __ASM_SPINLOCK_TYPES_H 10 #define __ASM_SPINLOCK_TYPES_H 11 12 typedef struct { 13 volatile unsigned int slock; 14 } arch_spinlock_t; 15 16 #define __ARCH_SPIN_LOCK_UNLOCKED__ 0 17 #define __ARCH_SPIN_LOCK_LOCKED__ 1 18 19 #define __ARCH_SPIN_LOCK_UNLOCKED { __ARCH_SPIN_LOCK_UNLOCKED__ } 20 #define __ARCH_SPIN_LOCK_LOCKED { __ARCH_SPIN_LOCK_LOCKED__ } 21 22 /* 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 26 */ 27 typedef struct { 28 volatile unsigned int counter; 29 #ifndef CONFIG_ARC_HAS_LLSC 30 arch_spinlock_t lock_mutex; 31 #endif 32 } arch_rwlock_t; 33 34 #define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000 35 #define __ARCH_RW_LOCK_UNLOCKED { .counter = __ARCH_RW_LOCK_UNLOCKED__ } 36 37 #endif 38