#ifndef _ALPHA_SPINLOCK_H#define _ALPHA_SPINLOCK_H #include <linux/config.h>#include <asm/system.h>#include <linux/kernel.h>#include <asm/current.h>  /* * Simple spin lock operations.  There are two variants, one clears IRQ's * on the local processor, one does not. * * We make no fairness assumptions. They have a cost. */ typedef struct {	volatile unsigned int lock;#ifdef CONFIG_DEBUG_SPINLOCK	int on_cpu;	int line_no;	void *previous;	struct task_struct * task;	const char *base_file;#endif} spinlock_t; #ifdef CONFIG_DEBUG_SPINLOCK#define SPIN_LOCK_UNLOCKED	(spinlock_t){ 0, -1, 0, NULL, NULL, NULL }#else#define SPIN_LOCK_UNLOCKED	(spinlock_t){ 0 }#endif #define spin_lock_init(x)	do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)#define spin_is_locked(x)	((x)->lock != 0)#define spin_unlock_wait(x)	do { barrier(); } while ((x)->lock) #ifdef CONFIG_DEBUG_SPINLOCKextern void _raw_spin_unlock(spinlock_t * lock);extern void debug_spin_lock(spinlock_t * lock, const char *, int);extern int debug_spin_trylock(spinlock_t * lock, const char *, int);#define _raw_spin_lock(LOCK) \	debug_spin_lock(LOCK, __BASE_FILE__, __LINE__)#define _raw_spin_trylock(LOCK) \	debug_spin_trylock(LOCK, __BASE_FILE__, __LINE__)#elsestatic inline void _raw_spin_unlock(spinlock_t * lock){	mb();	lock->lock = 0;} static inline void _raw_spin_lock(spinlock_t * lock){	long tmp; 	__asm__ __volatile__(	"1:	ldl_l	%0,%1\n"	"	bne	%0,2f\n"	"	lda	%0,1\n"	"	stl_c	%0,%1\n"	"	beq	%0,2f\n"	"	mb\n"	".subsection 2\n"	"2:	ldl	%0,%1\n"	"	bne	%0,2b\n"	"	br	1b\n"	".previous"	: "=&r" (tmp), "=m" (lock->lock)	: "m"(lock->lock) : "memory");} static inline int _raw_spin_trylock(spinlock_t *lock){	return !test_and_set_bit(0, &lock->lock);}#endif /* CONFIG_DEBUG_SPINLOCK */ #define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) /***********************************************************/ typedef struct {	volatile unsigned int lock;} rwlock_t; #define RW_LOCK_UNLOCKED	(rwlock_t){ 0 } #define rwlock_init(x)		do { *(x) = RW_LOCK_UNLOCKED; } while(0) static inline int read_can_lock(rwlock_t *lock){	return (lock->lock & 1) == 0;} static inline int write_can_lock(rwlock_t *lock){	return lock->lock == 0;} #ifdef CONFIG_DEBUG_RWLOCKextern void _raw_write_lock(rwlock_t * lock);extern void _raw_read_lock(rwlock_t * lock);#elsestatic inline void _raw_write_lock(rwlock_t * lock){	long regx; 	__asm__ __volatile__(	"1:	ldl_l	%1,%0\n"	"	bne	%1,6f\n"	"	lda	%1,1\n"	"	stl_c	%1,%0\n"	"	beq	%1,6f\n"	"	mb\n"	".subsection 2\n"	"6:	ldl	%1,%0\n"	"	bne	%1,6b\n"	"	br	1b\n"	".previous"	: "=m" (*lock), "=&r" (regx)	: "m" (*lock) : "memory");} static inline void _raw_read_lock(rwlock_t * lock){	long regx; 	__asm__ __volatile__(	"1:	ldl_l	%1,%0\n"	"	blbs	%1,6f\n"	"	subl	%1,2,%1\n"	"	stl_c	%1,%0\n"	"	beq	%1,6f\n"	"	mb\n"	".subsection 2\n"	"6:	ldl	%1,%0\n"	"	blbs	%1,6b\n"	"	br	1b\n"	".previous"	: "=m" (*lock), "=&r" (regx)	: "m" (*lock) : "memory");}#endif /* CONFIG_DEBUG_RWLOCK */ static inline int _raw_read_trylock(rwlock_t * lock){	long regx;	int success; 	__asm__ __volatile__(	"1:	ldl_l	%1,%0\n"	"	lda	%2,0\n"	"	blbs	%1,2f\n"	"	subl	%1,2,%2\n"	"	stl_c	%2,%0\n"	"	beq	%2,6f\n"	"2:	mb\n"	".subsection 2\n"	"6:	br	1b\n"	".previous"	: "=m" (*lock), "=&r" (regx), "=&r" (success)	: "m" (*lock) : "memory"); 	return success;} static inline int _raw_write_trylock(rwlock_t * lock){	long regx;	int success; 	__asm__ __volatile__(	"1:	ldl_l	%1,%0\n"	"	lda	%2,0\n"	"	bne	%1,2f\n"	"	lda	%2,1\n"	"	stl_c	%2,%0\n"	"	beq	%2,6f\n"	"2:	mb\n"	".subsection 2\n"	"6:	br	1b\n"	".previous"	: "=m" (*lock), "=&r" (regx), "=&r" (success)	: "m" (*lock) : "memory"); 	return success;} static inline void _raw_write_unlock(rwlock_t * lock){	mb();	lock->lock = 0;} static inline void _raw_read_unlock(rwlock_t * lock){	long regx;	__asm__ __volatile__(	"	mb\n"	"1:	ldl_l	%1,%0\n"	"	addl	%1,2,%1\n"	"	stl_c	%1,%0\n"	"	beq	%1,6f\n"	".subsection 2\n"	"6:	br	1b\n"	".previous"	: "=m" (*lock), "=&r" (regx)	: "m" (*lock) : "memory");} #endif /* _ALPHA_SPINLOCK_H */