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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