diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-18 15:12:18 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-11 20:00:35 +0530 |
| commit | 6e35fa2d430538cd0609e499c6f789beea9e9798 (patch) | |
| tree | 3ec427c979b67d903f5cebf6cf9b0e5f61b97805 /arch/arc/include/asm/spinlock_types.h | |
| parent | 3be80aaef861a60b85a9323462ebb5f623774f7a (diff) | |
ARC: Spinlock/rwlock/mutex primitives
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arc/include/asm/spinlock_types.h')
| -rw-r--r-- | arch/arc/include/asm/spinlock_types.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arc/include/asm/spinlock_types.h b/arch/arc/include/asm/spinlock_types.h new file mode 100644 index 00000000000..8276bfd6170 --- /dev/null +++ b/arch/arc/include/asm/spinlock_types.h @@ -0,0 +1,35 @@ +/* + * 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: 0x01_00_00_00 + * Read lock(s): 0x00_FF_00_00 to say 0x01 + * Write lock: 0x0, but only possible if prior value "unlocked" 0x0100_0000 + */ +typedef struct { + volatile unsigned int counter; + arch_spinlock_t lock_mutex; +} arch_rwlock_t; + +#define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000 +#define __ARCH_RW_LOCK_UNLOCKED { .counter = __ARCH_RW_LOCK_UNLOCKED__ } + +#endif |