blob: ca39ee350c3f422eee3ff28fa39cd5090600464e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SPINLOCK_TYPES_H
#define __ASM_SPINLOCK_TYPES_H
typedef struct {
#ifdef CONFIG_PA20
volatile unsigned int slock;
# define __ARCH_SPIN_LOCK_UNLOCKED { 1 }
#else
volatile unsigned int lock[4];
# define __ARCH_SPIN_LOCK_UNLOCKED { { 1, 1, 1, 1 } }
#endif
} arch_spinlock_t;
/* counter:
* 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 {
arch_spinlock_t lock_mutex;
volatile unsigned int counter;
} arch_rwlock_t;
#define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000
#define __ARCH_RW_LOCK_UNLOCKED { .lock_mutex = __ARCH_SPIN_LOCK_UNLOCKED, \
.counter = __ARCH_RW_LOCK_UNLOCKED__ }
#endif
|
