| /* |
| * 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 |
