aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-alpha/spinlock.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-alpha/spinlock.h')
-rw-r--r--include/asm-alpha/spinlock.h96
1 files changed, 27 insertions, 69 deletions
diff --git a/include/asm-alpha/spinlock.h b/include/asm-alpha/spinlock.h
index 80780dba998..8197c69eff4 100644
--- a/include/asm-alpha/spinlock.h
+++ b/include/asm-alpha/spinlock.h
@@ -6,7 +6,6 @@
6#include <linux/kernel.h> 6#include <linux/kernel.h>
7#include <asm/current.h> 7#include <asm/current.h>
8 8
9
10/* 9/*
11 * Simple spin lock operations. There are two variants, one clears IRQ's 10 * Simple spin lock operations. There are two variants, one clears IRQ's
12 * on the local processor, one does not. 11 * on the local processor, one does not.
@@ -14,43 +13,18 @@
14 * We make no fairness assumptions. They have a cost. 13 * We make no fairness assumptions. They have a cost.
15 */ 14 */
16 15
17typedef struct { 16#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
18 volatile unsigned int lock; 17#define __raw_spin_is_locked(x) ((x)->lock != 0)
19#ifdef CONFIG_DEBUG_SPINLOCK 18#define __raw_spin_unlock_wait(x) \
20 int on_cpu; 19 do { cpu_relax(); } while ((x)->lock)
21 int line_no; 20
22 void *previous; 21static inline void __raw_spin_unlock(raw_spinlock_t * lock)
23 struct task_struct * task;
24 const char *base_file;
25#endif
26} spinlock_t;
27
28#ifdef CONFIG_DEBUG_SPINLOCK
29#define SPIN_LOCK_UNLOCKED (spinlock_t){ 0, -1, 0, NULL, NULL, NULL }
30#else
31#define SPIN_LOCK_UNLOCKED (spinlock_t){ 0 }
32#endif
33
34#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
35#define spin_is_locked(x) ((x)->lock != 0)
36#define spin_unlock_wait(x) do { barrier(); } while ((x)->lock)
37
38#ifdef CONFIG_DEBUG_SPINLOCK
39extern void _raw_spin_unlock(spinlock_t * lock);
40extern void debug_spin_lock(spinlock_t * lock, const char *, int);
41extern int debug_spin_trylock(spinlock_t * lock, const char *, int);
42#define _raw_spin_lock(LOCK) \
43 debug_spin_lock(LOCK, __BASE_FILE__, __LINE__)
44#define _raw_spin_trylock(LOCK) \
45 debug_spin_trylock(LOCK, __BASE_FILE__, __LINE__)
46#else
47static inline void _raw_spin_unlock(spinlock_t * lock)
48{ 22{
49 mb(); 23 mb();
50 lock->lock = 0; 24 lock->lock = 0;
51} 25}
52 26
53static inline void _raw_spin_lock(spinlock_t * lock) 27static inline void __raw_spin_lock(raw_spinlock_t * lock)
54{ 28{
55 long tmp; 29 long tmp;
56 30
@@ -70,80 +44,64 @@ static inline void _raw_spin_lock(spinlock_t * lock)
70 : "m"(lock->lock) : "memory"); 44 : "m"(lock->lock) : "memory");
71} 45}
72 46
73static inline int _raw_spin_trylock(spinlock_t *lock) 47static inline int __raw_spin_trylock(raw_spinlock_t *lock)
74{ 48{
75 return !test_and_set_bit(0, &lock->lock); 49 return !test_and_set_bit(0, &lock->lock);
76} 50}
77#endif /* CONFIG_DEBUG_SPINLOCK */
78
79#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
80 51
81/***********************************************************/ 52/***********************************************************/
82 53
83typedef struct { 54static inline int __raw_read_can_lock(raw_rwlock_t *lock)
84 volatile unsigned int lock;
85} rwlock_t;
86
87#define RW_LOCK_UNLOCKED (rwlock_t){ 0 }
88
89#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
90
91static inline int read_can_lock(rwlock_t *lock)
92{ 55{
93 return (lock->lock & 1) == 0; 56 return (lock->lock & 1) == 0;
94} 57}
95 58
96static inline int write_can_lock(rwlock_t *lock) 59static inline int __raw_write_can_lock(raw_rwlock_t *lock)
97{ 60{
98 return lock->lock == 0; 61 return lock->lock == 0;
99} 62}
100 63
101#ifdef CONFIG_DEBUG_RWLOCK 64static inline void __raw_read_lock(raw_rwlock_t *lock)
102extern void _raw_write_lock(rwlock_t * lock);
103extern void _raw_read_lock(rwlock_t * lock);
104#else
105static inline void _raw_write_lock(rwlock_t * lock)
106{ 65{
107 long regx; 66 long regx;
108 67
109 __asm__ __volatile__( 68 __asm__ __volatile__(
110 "1: ldl_l %1,%0\n" 69 "1: ldl_l %1,%0\n"
111 " bne %1,6f\n" 70 " blbs %1,6f\n"
112 " lda %1,1\n" 71 " subl %1,2,%1\n"
113 " stl_c %1,%0\n" 72 " stl_c %1,%0\n"
114 " beq %1,6f\n" 73 " beq %1,6f\n"
115 " mb\n" 74 " mb\n"
116 ".subsection 2\n" 75 ".subsection 2\n"
117 "6: ldl %1,%0\n" 76 "6: ldl %1,%0\n"
118 " bne %1,6b\n" 77 " blbs %1,6b\n"
119 " br 1b\n" 78 " br 1b\n"
120 ".previous" 79 ".previous"
121 : "=m" (*lock), "=&r" (regx) 80 : "=m" (*lock), "=&r" (regx)
122 : "m" (*lock) : "memory"); 81 : "m" (*lock) : "memory");
123} 82}
124 83
125static inline void _raw_read_lock(rwlock_t * lock) 84static inline void __raw_write_lock(raw_rwlock_t *lock)
126{ 85{
127 long regx; 86 long regx;
128 87
129 __asm__ __volatile__( 88 __asm__ __volatile__(
130 "1: ldl_l %1,%0\n" 89 "1: ldl_l %1,%0\n"
131 " blbs %1,6f\n" 90 " bne %1,6f\n"
132 " subl %1,2,%1\n" 91 " lda %1,1\n"
133 " stl_c %1,%0\n" 92 " stl_c %1,%0\n"
134 " beq %1,6f\n" 93 " beq %1,6f\n"
135 " mb\n" 94 " mb\n"
136 ".subsection 2\n" 95 ".subsection 2\n"
137 "6: ldl %1,%0\n" 96 "6: ldl %1,%0\n"
138 " blbs %1,6b\n" 97 " bne %1,6b\n"
139 " br 1b\n" 98 " br 1b\n"
140 ".previous" 99 ".previous"
141 : "=m" (*lock), "=&r" (regx) 100 : "=m" (*lock), "=&r" (regx)
142 : "m" (*lock) : "memory"); 101 : "m" (*lock) : "memory");
143} 102}
144#endif /* CONFIG_DEBUG_RWLOCK */
145 103
146static inline int _raw_read_trylock(rwlock_t * lock) 104static inline int __raw_read_trylock(raw_rwlock_t * lock)
147{ 105{
148 long regx; 106 long regx;
149 int success; 107 int success;
@@ -165,7 +123,7 @@ static inline int _raw_read_trylock(rwlock_t * lock)
165 return success; 123 return success;
166} 124}
167 125
168static inline int _raw_write_trylock(rwlock_t * lock) 126static inline int __raw_write_trylock(raw_rwlock_t * lock)
169{ 127{
170 long regx; 128 long regx;
171 int success; 129 int success;
@@ -187,13 +145,7 @@ static inline int _raw_write_trylock(rwlock_t * lock)
187 return success; 145 return success;
188} 146}
189 147
190static inline void _raw_write_unlock(rwlock_t * lock) 148static inline void __raw_read_unlock(raw_rwlock_t * lock)
191{
192 mb();
193 lock->lock = 0;
194}
195
196static inline void _raw_read_unlock(rwlock_t * lock)
197{ 149{
198 long regx; 150 long regx;
199 __asm__ __volatile__( 151 __asm__ __volatile__(
@@ -209,4 +161,10 @@ static inline void _raw_read_unlock(rwlock_t * lock)
209 : "m" (*lock) : "memory"); 161 : "m" (*lock) : "memory");
210} 162}
211 163
164static inline void __raw_write_unlock(raw_rwlock_t * lock)
165{
166 mb();
167 lock->lock = 0;
168}
169
212#endif /* _ALPHA_SPINLOCK_H */ 170#endif /* _ALPHA_SPINLOCK_H */