#ifndef __SPARC64_SPINLOCK_H
#define __SPARC64_SPINLOCK_H
-#include <linux/config.h>
#include <linux/threads.h> /* For NR_CPUS */
#ifndef __ASSEMBLY__
* must be pre-V9 branches.
*/
-#ifndef CONFIG_DEBUG_SPINLOCK
+#define __raw_spin_is_locked(lp) ((lp)->lock != 0)
-typedef struct {
- volatile unsigned char lock;
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) {0,}
+#define __raw_spin_unlock_wait(lp) \
+ do { rmb(); \
+ } while((lp)->lock)
-#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0)
-#define spin_is_locked(lp) ((lp)->lock != 0)
-
-#define spin_unlock_wait(lp) \
-do { rmb(); \
-} while((lp)->lock)
-
-static inline void _raw_spin_lock(spinlock_t *lock)
+static inline void __raw_spin_lock(raw_spinlock_t *lock)
{
unsigned long tmp;
: "memory");
}
-static inline int _raw_spin_trylock(spinlock_t *lock)
+static inline int __raw_spin_trylock(raw_spinlock_t *lock)
{
unsigned long result;
return (result == 0UL);
}
-static inline void _raw_spin_unlock(spinlock_t *lock)
+static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
__asm__ __volatile__(
" membar #StoreStore | #LoadStore\n"
: "memory");
}
-static inline void _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags)
+static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)
{
unsigned long tmp1, tmp2;
: "memory");
}
-#else /* !(CONFIG_DEBUG_SPINLOCK) */
-
-typedef struct {
- volatile unsigned char lock;
- unsigned int owner_pc, owner_cpu;
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 0, 0xff }
-#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0)
-#define spin_is_locked(__lock) ((__lock)->lock != 0)
-#define spin_unlock_wait(__lock) \
-do { \
- rmb(); \
-} while((__lock)->lock)
-
-extern void _do_spin_lock(spinlock_t *lock, char *str, unsigned long caller);
-extern void _do_spin_unlock(spinlock_t *lock);
-extern int _do_spin_trylock(spinlock_t *lock, unsigned long caller);
-
-#define _raw_spin_trylock(lp) \
- _do_spin_trylock(lp, (unsigned long) __builtin_return_address(0))
-#define _raw_spin_lock(lock) \
- _do_spin_lock(lock, "spin_lock", \
- (unsigned long) __builtin_return_address(0))
-#define _raw_spin_unlock(lock) _do_spin_unlock(lock)
-#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
-
-#endif /* CONFIG_DEBUG_SPINLOCK */
-
/* Multi-reader locks, these are much saner than the 32-bit Sparc ones... */
-#ifndef CONFIG_DEBUG_SPINLOCK
-
-typedef struct {
- volatile unsigned int lock;
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} rwlock_t;
-#define RW_LOCK_UNLOCKED (rwlock_t) {0,}
-#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0)
-
-static void inline __read_lock(rwlock_t *lock)
+static void inline __read_lock(raw_rwlock_t *lock)
{
unsigned long tmp1, tmp2;
: "memory");
}
-static void inline __read_unlock(rwlock_t *lock)
+static int inline __read_trylock(raw_rwlock_t *lock)
+{
+ int tmp1, tmp2;
+
+ __asm__ __volatile__ (
+"1: ldsw [%2], %0\n"
+" brlz,a,pn %0, 2f\n"
+" mov 0, %0\n"
+" add %0, 1, %1\n"
+" cas [%2], %0, %1\n"
+" cmp %0, %1\n"
+" membar #StoreLoad | #StoreStore\n"
+" bne,pn %%icc, 1b\n"
+" mov 1, %0\n"
+"2:"
+ : "=&r" (tmp1), "=&r" (tmp2)
+ : "r" (lock)
+ : "memory");
+
+ return tmp1;
+}
+
+static void inline __read_unlock(raw_rwlock_t *lock)
{
unsigned long tmp1, tmp2;
: "memory");
}
-static void inline __write_lock(rwlock_t *lock)
+static void inline __write_lock(raw_rwlock_t *lock)
{
unsigned long mask, tmp1, tmp2;
: "memory");
}
-static void inline __write_unlock(rwlock_t *lock)
+static void inline __write_unlock(raw_rwlock_t *lock)
{
__asm__ __volatile__(
" membar #LoadStore | #StoreStore\n"
: "memory");
}
-static int inline __write_trylock(rwlock_t *lock)
+static int inline __write_trylock(raw_rwlock_t *lock)
{
unsigned long mask, tmp1, tmp2, result;
return result;
}
-#define _raw_read_lock(p) __read_lock(p)
-#define _raw_read_unlock(p) __read_unlock(p)
-#define _raw_write_lock(p) __write_lock(p)
-#define _raw_write_unlock(p) __write_unlock(p)
-#define _raw_write_trylock(p) __write_trylock(p)
-
-#else /* !(CONFIG_DEBUG_SPINLOCK) */
-
-typedef struct {
- volatile unsigned long lock;
- unsigned int writer_pc, writer_cpu;
- unsigned int reader_pc[NR_CPUS];
-#ifdef CONFIG_PREEMPT
- unsigned int break_lock;
-#endif
-} rwlock_t;
-#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0, 0xff, { } }
-#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0)
-
-extern void _do_read_lock(rwlock_t *rw, char *str, unsigned long caller);
-extern void _do_read_unlock(rwlock_t *rw, char *str, unsigned long caller);
-extern void _do_write_lock(rwlock_t *rw, char *str, unsigned long caller);
-extern void _do_write_unlock(rwlock_t *rw, unsigned long caller);
-extern int _do_write_trylock(rwlock_t *rw, char *str, unsigned long caller);
-
-#define _raw_read_lock(lock) \
-do { unsigned long flags; \
- local_irq_save(flags); \
- _do_read_lock(lock, "read_lock", \
- (unsigned long) __builtin_return_address(0)); \
- local_irq_restore(flags); \
-} while(0)
-
-#define _raw_read_unlock(lock) \
-do { unsigned long flags; \
- local_irq_save(flags); \
- _do_read_unlock(lock, "read_unlock", \
- (unsigned long) __builtin_return_address(0)); \
- local_irq_restore(flags); \
-} while(0)
-
-#define _raw_write_lock(lock) \
-do { unsigned long flags; \
- local_irq_save(flags); \
- _do_write_lock(lock, "write_lock", \
- (unsigned long) __builtin_return_address(0)); \
- local_irq_restore(flags); \
-} while(0)
-
-#define _raw_write_unlock(lock) \
-do { unsigned long flags; \
- local_irq_save(flags); \
- _do_write_unlock(lock, \
- (unsigned long) __builtin_return_address(0)); \
- local_irq_restore(flags); \
-} while(0)
-
-#define _raw_write_trylock(lock) \
-({ unsigned long flags; \
- int val; \
- local_irq_save(flags); \
- val = _do_write_trylock(lock, "write_trylock", \
- (unsigned long) __builtin_return_address(0)); \
- local_irq_restore(flags); \
- val; \
-})
-
-#endif /* CONFIG_DEBUG_SPINLOCK */
-
-#define _raw_read_trylock(lock) generic_raw_read_trylock(lock)
-#define read_can_lock(rw) (!((rw)->lock & 0x80000000UL))
-#define write_can_lock(rw) (!(rw)->lock)
+#define __raw_read_lock(p) __read_lock(p)
+#define __raw_read_trylock(p) __read_trylock(p)
+#define __raw_read_unlock(p) __read_unlock(p)
+#define __raw_write_lock(p) __write_lock(p)
+#define __raw_write_unlock(p) __write_unlock(p)
+#define __raw_write_trylock(p) __write_trylock(p)
+
+#define __raw_read_can_lock(rw) (!((rw)->lock & 0x80000000UL))
+#define __raw_write_can_lock(rw) (!(rw)->lock)
#endif /* !(__ASSEMBLY__) */