1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 */
5
6#ifndef __ASM_SPINLOCK_TYPES_H
7#define __ASM_SPINLOCK_TYPES_H
8
9typedef struct {
10	volatile unsigned int slock;
11} arch_spinlock_t;
12
13#define __ARCH_SPIN_LOCK_UNLOCKED__	0
14#define __ARCH_SPIN_LOCK_LOCKED__	1
15
16#define __ARCH_SPIN_LOCK_UNLOCKED	{ __ARCH_SPIN_LOCK_UNLOCKED__ }
17#define __ARCH_SPIN_LOCK_LOCKED		{ __ARCH_SPIN_LOCK_LOCKED__ }
18
19/*
20 * Unlocked     : 0x0100_0000
21 * Read lock(s) : 0x00FF_FFFF to 0x01  (Multiple Readers decrement it)
22 * Write lock   : 0x0, but only if prior value is "unlocked" 0x0100_0000
23 */
24typedef struct {
25	volatile unsigned int	counter;
26#ifndef CONFIG_ARC_HAS_LLSC
27	arch_spinlock_t		lock_mutex;
28#endif
29} arch_rwlock_t;
30
31#define __ARCH_RW_LOCK_UNLOCKED__	0x01000000
32#define __ARCH_RW_LOCK_UNLOCKED		{ .counter = __ARCH_RW_LOCK_UNLOCKED__ }
33
34#endif
35