1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SPINLOCK_TYPES_H
3 #define __ASM_SPINLOCK_TYPES_H
4 
5 #define __ARCH_SPIN_LOCK_UNLOCKED_VAL	0x1a46
6 
7 #define SPINLOCK_BREAK_INSN	0x0000c006	/* break 6,6 */
8 
9 #ifndef __ASSEMBLY__
10 
11 typedef struct {
12 #ifdef CONFIG_PA20
13 	volatile unsigned int slock;
14 # define __ARCH_SPIN_LOCK_UNLOCKED { __ARCH_SPIN_LOCK_UNLOCKED_VAL }
15 #else
16 	volatile unsigned int lock[4];
17 # define __ARCH_SPIN_LOCK_UNLOCKED	\
18 	{ { __ARCH_SPIN_LOCK_UNLOCKED_VAL, __ARCH_SPIN_LOCK_UNLOCKED_VAL, \
19 	    __ARCH_SPIN_LOCK_UNLOCKED_VAL, __ARCH_SPIN_LOCK_UNLOCKED_VAL } }
20 #endif
21 } arch_spinlock_t;
22 
23 
24 /* counter:
25  * Unlocked     : 0x0100_0000
26  * Read lock(s) : 0x00FF_FFFF to 0x01  (Multiple Readers decrement it)
27  * Write lock   : 0x0, but only if prior value is "unlocked" 0x0100_0000
28  */
29 typedef struct {
30 	arch_spinlock_t		lock_mutex;
31 	volatile unsigned int	counter;
32 } arch_rwlock_t;
33 
34 #endif /* __ASSEMBLY__ */
35 
36 #define __ARCH_RW_LOCK_UNLOCKED__       0x01000000
37 #define __ARCH_RW_LOCK_UNLOCKED         { .lock_mutex = __ARCH_SPIN_LOCK_UNLOCKED, \
38 					.counter = __ARCH_RW_LOCK_UNLOCKED__ }
39 
40 #endif
41