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Diffstat (limited to 'include/asm-ppc/spinlock.h')
-rw-r--r--include/asm-ppc/spinlock.h168
1 files changed, 0 insertions, 168 deletions
diff --git a/include/asm-ppc/spinlock.h b/include/asm-ppc/spinlock.h
deleted file mode 100644
index fccaf5531e57..000000000000
--- a/include/asm-ppc/spinlock.h
+++ /dev/null
@@ -1,168 +0,0 @@
-#ifndef __ASM_SPINLOCK_H
-#define __ASM_SPINLOCK_H
-
-#include <asm/system.h>
-
-/*
- * Simple spin lock operations.
- *
- * (the type definitions are in asm/raw_spinlock_types.h)
- */
-
-#define __raw_spin_is_locked(x) ((x)->slock != 0)
-#define __raw_spin_unlock_wait(lock) \
- do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
-#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
-
-static inline void __raw_spin_lock(raw_spinlock_t *lock)
-{
- unsigned long tmp;
-
- __asm__ __volatile__(
- "b 1f # __raw_spin_lock\n\
-2: lwzx %0,0,%1\n\
- cmpwi 0,%0,0\n\
- bne+ 2b\n\
-1: lwarx %0,0,%1\n\
- cmpwi 0,%0,0\n\
- bne- 2b\n"
- PPC405_ERR77(0,%1)
-" stwcx. %2,0,%1\n\
- bne- 2b\n\
- isync"
- : "=&r"(tmp)
- : "r"(&lock->slock), "r"(1)
- : "cr0", "memory");
-}
-
-static inline void __raw_spin_unlock(raw_spinlock_t *lock)
-{
- __asm__ __volatile__("eieio # __raw_spin_unlock": : :"memory");
- lock->slock = 0;
-}
-
-#define __raw_spin_trylock(l) (!test_and_set_bit(0,(volatile unsigned long *)(&(l)->slock)))
-
-/*
- * Read-write spinlocks, allowing multiple readers
- * but only one writer.
- *
- * NOTE! it is quite common to have readers in interrupts
- * but no interrupt writers. For those circumstances we
- * can "mix" irq-safe locks - any writer needs to get a
- * irq-safe write-lock, but readers can get non-irqsafe
- * read-locks.
- */
-
-#define __raw_read_can_lock(rw) ((rw)->lock >= 0)
-#define __raw_write_can_lock(rw) (!(rw)->lock)
-
-static __inline__ int __raw_read_trylock(raw_rwlock_t *rw)
-{
- signed int tmp;
-
- __asm__ __volatile__(
-"2: lwarx %0,0,%1 # read_trylock\n\
- addic. %0,%0,1\n\
- ble- 1f\n"
- PPC405_ERR77(0,%1)
-" stwcx. %0,0,%1\n\
- bne- 2b\n\
- isync\n\
-1:"
- : "=&r"(tmp)
- : "r"(&rw->lock)
- : "cr0", "memory");
-
- return tmp > 0;
-}
-
-static __inline__ void __raw_read_lock(raw_rwlock_t *rw)
-{
- signed int tmp;
-
- __asm__ __volatile__(
- "b 2f # read_lock\n\
-1: lwzx %0,0,%1\n\
- cmpwi 0,%0,0\n\
- blt+ 1b\n\
-2: lwarx %0,0,%1\n\
- addic. %0,%0,1\n\
- ble- 1b\n"
- PPC405_ERR77(0,%1)
-" stwcx. %0,0,%1\n\
- bne- 2b\n\
- isync"
- : "=&r"(tmp)
- : "r"(&rw->lock)
- : "cr0", "memory");
-}
-
-static __inline__ void __raw_read_unlock(raw_rwlock_t *rw)
-{
- signed int tmp;
-
- __asm__ __volatile__(
- "eieio # read_unlock\n\
-1: lwarx %0,0,%1\n\
- addic %0,%0,-1\n"
- PPC405_ERR77(0,%1)
-" stwcx. %0,0,%1\n\
- bne- 1b"
- : "=&r"(tmp)
- : "r"(&rw->lock)
- : "cr0", "memory");
-}
-
-static __inline__ int __raw_write_trylock(raw_rwlock_t *rw)
-{
- signed int tmp;
-
- __asm__ __volatile__(
-"2: lwarx %0,0,%1 # write_trylock\n\
- cmpwi 0,%0,0\n\
- bne- 1f\n"
- PPC405_ERR77(0,%1)
-" stwcx. %2,0,%1\n\
- bne- 2b\n\
- isync\n\
-1:"
- : "=&r"(tmp)
- : "r"(&rw->lock), "r"(-1)
- : "cr0", "memory");
-
- return tmp == 0;
-}
-
-static __inline__ void __raw_write_lock(raw_rwlock_t *rw)
-{
- signed int tmp;
-
- __asm__ __volatile__(
- "b 2f # write_lock\n\
-1: lwzx %0,0,%1\n\
- cmpwi 0,%0,0\n\
- bne+ 1b\n\
-2: lwarx %0,0,%1\n\
- cmpwi 0,%0,0\n\
- bne- 1b\n"
- PPC405_ERR77(0,%1)
-" stwcx. %2,0,%1\n\
- bne- 2b\n\
- isync"
- : "=&r"(tmp)
- : "r"(&rw->lock), "r"(-1)
- : "cr0", "memory");
-}
-
-static __inline__ void __raw_write_unlock(raw_rwlock_t *rw)
-{
- __asm__ __volatile__("eieio # write_unlock": : :"memory");
- rw->lock = 0;
-}
-
-#define _raw_spin_relax(lock) cpu_relax()
-#define _raw_read_relax(lock) cpu_relax()
-#define _raw_write_relax(lock) cpu_relax()
-
-#endif /* __ASM_SPINLOCK_H */