diff options
author | Paul Mackerras <paulus@samba.org> | 2008-06-09 14:01:46 +1000 |
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committer | Paul Mackerras <paulus@samba.org> | 2008-06-10 21:40:22 +1000 |
commit | 917f0af9e5a9ceecf9e72537fabb501254ba321d (patch) | |
tree | 1ef207755c6d83ce4af93ef2b5e4645eebd65886 /include/asm-ppc/spinlock.h | |
parent | 0f3d6bcd391b058c619fc30e8022e8a29fbf4bef (diff) |
powerpc: Remove arch/ppc and include/asm-ppc
All the maintained platforms are now in arch/powerpc, so the old
arch/ppc stuff can now go away.
Acked-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Becky Bruce <becky.bruce@freescale.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Jochen Friedrich <jochen@scram.de>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: Jon Loeliger <jdl@freescale.com>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Scott Wood <scottwood@freescale.com>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc/spinlock.h')
-rw-r--r-- | include/asm-ppc/spinlock.h | 168 |
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 fccaf5531e5..00000000000 --- 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 */ |