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