diff options
Diffstat (limited to 'include/asm-alpha/spinlock.h')
| -rw-r--r-- | include/asm-alpha/spinlock.h | 96 |
1 files changed, 27 insertions, 69 deletions
diff --git a/include/asm-alpha/spinlock.h b/include/asm-alpha/spinlock.h index 80780dba9986..8197c69eff44 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 | ||
| 17 | typedef 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; | 21 | static 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 | ||
| 39 | extern void _raw_spin_unlock(spinlock_t * lock); | ||
| 40 | extern void debug_spin_lock(spinlock_t * lock, const char *, int); | ||
| 41 | extern 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 | ||
| 47 | static 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 | ||
| 53 | static inline void _raw_spin_lock(spinlock_t * lock) | 27 | static 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 | ||
| 73 | static inline int _raw_spin_trylock(spinlock_t *lock) | 47 | static 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 | ||
| 83 | typedef struct { | 54 | static 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 | |||
| 91 | static 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 | ||
| 96 | static inline int write_can_lock(rwlock_t *lock) | 59 | static 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 | 64 | static inline void __raw_read_lock(raw_rwlock_t *lock) |
| 102 | extern void _raw_write_lock(rwlock_t * lock); | ||
| 103 | extern void _raw_read_lock(rwlock_t * lock); | ||
| 104 | #else | ||
| 105 | static 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 | ||
| 125 | static inline void _raw_read_lock(rwlock_t * lock) | 84 | static 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 | ||
| 146 | static inline int _raw_read_trylock(rwlock_t * lock) | 104 | static 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 | ||
| 168 | static inline int _raw_write_trylock(rwlock_t * lock) | 126 | static 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 | ||
| 190 | static inline void _raw_write_unlock(rwlock_t * lock) | 148 | static inline void __raw_read_unlock(raw_rwlock_t * lock) |
| 191 | { | ||
| 192 | mb(); | ||
| 193 | lock->lock = 0; | ||
| 194 | } | ||
| 195 | |||
| 196 | static 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 | ||
| 164 | static 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 */ |
