spinlock.h (fb3a6bbc912b12347614e5742c7c61416cdb0ca0) spinlock.h (e5931943d02bf751b1ec849c0d2ade23d76a8d41)
1#ifndef _ALPHA_SPINLOCK_H
2#define _ALPHA_SPINLOCK_H
3
4#include <asm/system.h>
5#include <linux/kernel.h>
6#include <asm/current.h>
7
8/*

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45
46static inline int arch_spin_trylock(arch_spinlock_t *lock)
47{
48 return !test_and_set_bit(0, &lock->lock);
49}
50
51/***********************************************************/
52
1#ifndef _ALPHA_SPINLOCK_H
2#define _ALPHA_SPINLOCK_H
3
4#include <asm/system.h>
5#include <linux/kernel.h>
6#include <asm/current.h>
7
8/*

--- 36 unchanged lines hidden (view full) ---

45
46static inline int arch_spin_trylock(arch_spinlock_t *lock)
47{
48 return !test_and_set_bit(0, &lock->lock);
49}
50
51/***********************************************************/
52
53static inline int __raw_read_can_lock(arch_rwlock_t *lock)
53static inline int arch_read_can_lock(arch_rwlock_t *lock)
54{
55 return (lock->lock & 1) == 0;
56}
57
54{
55 return (lock->lock & 1) == 0;
56}
57
58static inline int __raw_write_can_lock(arch_rwlock_t *lock)
58static inline int arch_write_can_lock(arch_rwlock_t *lock)
59{
60 return lock->lock == 0;
61}
62
59{
60 return lock->lock == 0;
61}
62
63static inline void __raw_read_lock(arch_rwlock_t *lock)
63static inline void arch_read_lock(arch_rwlock_t *lock)
64{
65 long regx;
66
67 __asm__ __volatile__(
68 "1: ldl_l %1,%0\n"
69 " blbs %1,6f\n"
70 " subl %1,2,%1\n"
71 " stl_c %1,%0\n"
72 " beq %1,6f\n"
73 " mb\n"
74 ".subsection 2\n"
75 "6: ldl %1,%0\n"
76 " blbs %1,6b\n"
77 " br 1b\n"
78 ".previous"
79 : "=m" (*lock), "=&r" (regx)
80 : "m" (*lock) : "memory");
81}
82
64{
65 long regx;
66
67 __asm__ __volatile__(
68 "1: ldl_l %1,%0\n"
69 " blbs %1,6f\n"
70 " subl %1,2,%1\n"
71 " stl_c %1,%0\n"
72 " beq %1,6f\n"
73 " mb\n"
74 ".subsection 2\n"
75 "6: ldl %1,%0\n"
76 " blbs %1,6b\n"
77 " br 1b\n"
78 ".previous"
79 : "=m" (*lock), "=&r" (regx)
80 : "m" (*lock) : "memory");
81}
82
83static inline void __raw_write_lock(arch_rwlock_t *lock)
83static inline void arch_write_lock(arch_rwlock_t *lock)
84{
85 long regx;
86
87 __asm__ __volatile__(
88 "1: ldl_l %1,%0\n"
89 " bne %1,6f\n"
90 " lda %1,1\n"
91 " stl_c %1,%0\n"
92 " beq %1,6f\n"
93 " mb\n"
94 ".subsection 2\n"
95 "6: ldl %1,%0\n"
96 " bne %1,6b\n"
97 " br 1b\n"
98 ".previous"
99 : "=m" (*lock), "=&r" (regx)
100 : "m" (*lock) : "memory");
101}
102
84{
85 long regx;
86
87 __asm__ __volatile__(
88 "1: ldl_l %1,%0\n"
89 " bne %1,6f\n"
90 " lda %1,1\n"
91 " stl_c %1,%0\n"
92 " beq %1,6f\n"
93 " mb\n"
94 ".subsection 2\n"
95 "6: ldl %1,%0\n"
96 " bne %1,6b\n"
97 " br 1b\n"
98 ".previous"
99 : "=m" (*lock), "=&r" (regx)
100 : "m" (*lock) : "memory");
101}
102
103static inline int __raw_read_trylock(arch_rwlock_t * lock)
103static inline int arch_read_trylock(arch_rwlock_t * lock)
104{
105 long regx;
106 int success;
107
108 __asm__ __volatile__(
109 "1: ldl_l %1,%0\n"
110 " lda %2,0\n"
111 " blbs %1,2f\n"

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117 "6: br 1b\n"
118 ".previous"
119 : "=m" (*lock), "=&r" (regx), "=&r" (success)
120 : "m" (*lock) : "memory");
121
122 return success;
123}
124
104{
105 long regx;
106 int success;
107
108 __asm__ __volatile__(
109 "1: ldl_l %1,%0\n"
110 " lda %2,0\n"
111 " blbs %1,2f\n"

--- 5 unchanged lines hidden (view full) ---

117 "6: br 1b\n"
118 ".previous"
119 : "=m" (*lock), "=&r" (regx), "=&r" (success)
120 : "m" (*lock) : "memory");
121
122 return success;
123}
124
125static inline int __raw_write_trylock(arch_rwlock_t * lock)
125static inline int arch_write_trylock(arch_rwlock_t * lock)
126{
127 long regx;
128 int success;
129
130 __asm__ __volatile__(
131 "1: ldl_l %1,%0\n"
132 " lda %2,0\n"
133 " bne %1,2f\n"

--- 5 unchanged lines hidden (view full) ---

139 "6: br 1b\n"
140 ".previous"
141 : "=m" (*lock), "=&r" (regx), "=&r" (success)
142 : "m" (*lock) : "memory");
143
144 return success;
145}
146
126{
127 long regx;
128 int success;
129
130 __asm__ __volatile__(
131 "1: ldl_l %1,%0\n"
132 " lda %2,0\n"
133 " bne %1,2f\n"

--- 5 unchanged lines hidden (view full) ---

139 "6: br 1b\n"
140 ".previous"
141 : "=m" (*lock), "=&r" (regx), "=&r" (success)
142 : "m" (*lock) : "memory");
143
144 return success;
145}
146
147static inline void __raw_read_unlock(arch_rwlock_t * lock)
147static inline void arch_read_unlock(arch_rwlock_t * lock)
148{
149 long regx;
150 __asm__ __volatile__(
151 " mb\n"
152 "1: ldl_l %1,%0\n"
153 " addl %1,2,%1\n"
154 " stl_c %1,%0\n"
155 " beq %1,6f\n"
156 ".subsection 2\n"
157 "6: br 1b\n"
158 ".previous"
159 : "=m" (*lock), "=&r" (regx)
160 : "m" (*lock) : "memory");
161}
162
148{
149 long regx;
150 __asm__ __volatile__(
151 " mb\n"
152 "1: ldl_l %1,%0\n"
153 " addl %1,2,%1\n"
154 " stl_c %1,%0\n"
155 " beq %1,6f\n"
156 ".subsection 2\n"
157 "6: br 1b\n"
158 ".previous"
159 : "=m" (*lock), "=&r" (regx)
160 : "m" (*lock) : "memory");
161}
162
163static inline void __raw_write_unlock(arch_rwlock_t * lock)
163static inline void arch_write_unlock(arch_rwlock_t * lock)
164{
165 mb();
166 lock->lock = 0;
167}
168
164{
165 mb();
166 lock->lock = 0;
167}
168
169#define __raw_read_lock_flags(lock, flags) __raw_read_lock(lock)
170#define __raw_write_lock_flags(lock, flags) __raw_write_lock(lock)
169#define arch_read_lock_flags(lock, flags) arch_read_lock(lock)
170#define arch_write_lock_flags(lock, flags) arch_write_lock(lock)
171
172#define arch_spin_relax(lock) cpu_relax()
173#define arch_read_relax(lock) cpu_relax()
174#define arch_write_relax(lock) cpu_relax()
175
176#endif /* _ALPHA_SPINLOCK_H */
171
172#define arch_spin_relax(lock) cpu_relax()
173#define arch_read_relax(lock) cpu_relax()
174#define arch_write_relax(lock) cpu_relax()
175
176#endif /* _ALPHA_SPINLOCK_H */