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Diffstat (limited to 'arch/powerpc/include/asm/spinlock.h')
-rw-r--r--arch/powerpc/include/asm/spinlock.h32
1 files changed, 17 insertions, 15 deletions
diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index 764094cff681..f9611bd69ed2 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -27,6 +27,7 @@
27#endif 27#endif
28#include <asm/asm-compat.h> 28#include <asm/asm-compat.h>
29#include <asm/synch.h> 29#include <asm/synch.h>
30#include <asm/ppc-opcode.h>
30 31
31#define arch_spin_is_locked(x) ((x)->slock != 0) 32#define arch_spin_is_locked(x) ((x)->slock != 0)
32 33
@@ -60,13 +61,14 @@ static inline unsigned long __arch_spin_trylock(arch_spinlock_t *lock)
60 61
61 token = LOCK_TOKEN; 62 token = LOCK_TOKEN;
62 __asm__ __volatile__( 63 __asm__ __volatile__(
63"1: lwarx %0,0,%2\n\ 64"1: " PPC_LWARX(%0,0,%2,1) "\n\
64 cmpwi 0,%0,0\n\ 65 cmpwi 0,%0,0\n\
65 bne- 2f\n\ 66 bne- 2f\n\
66 stwcx. %1,0,%2\n\ 67 stwcx. %1,0,%2\n\
67 bne- 1b\n\ 68 bne- 1b\n"
68 isync\n\ 69 PPC_ACQUIRE_BARRIER
692:" : "=&r" (tmp) 70"2:"
71 : "=&r" (tmp)
70 : "r" (token), "r" (&lock->slock) 72 : "r" (token), "r" (&lock->slock)
71 : "cr0", "memory"); 73 : "cr0", "memory");
72 74
@@ -144,7 +146,7 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock)
144{ 146{
145 SYNC_IO; 147 SYNC_IO;
146 __asm__ __volatile__("# arch_spin_unlock\n\t" 148 __asm__ __volatile__("# arch_spin_unlock\n\t"
147 LWSYNC_ON_SMP: : :"memory"); 149 PPC_RELEASE_BARRIER: : :"memory");
148 lock->slock = 0; 150 lock->slock = 0;
149} 151}
150 152
@@ -186,15 +188,15 @@ static inline long __arch_read_trylock(arch_rwlock_t *rw)
186 long tmp; 188 long tmp;
187 189
188 __asm__ __volatile__( 190 __asm__ __volatile__(
189"1: lwarx %0,0,%1\n" 191"1: " PPC_LWARX(%0,0,%1,1) "\n"
190 __DO_SIGN_EXTEND 192 __DO_SIGN_EXTEND
191" addic. %0,%0,1\n\ 193" addic. %0,%0,1\n\
192 ble- 2f\n" 194 ble- 2f\n"
193 PPC405_ERR77(0,%1) 195 PPC405_ERR77(0,%1)
194" stwcx. %0,0,%1\n\ 196" stwcx. %0,0,%1\n\
195 bne- 1b\n\ 197 bne- 1b\n"
196 isync\n\ 198 PPC_ACQUIRE_BARRIER
1972:" : "=&r" (tmp) 199"2:" : "=&r" (tmp)
198 : "r" (&rw->lock) 200 : "r" (&rw->lock)
199 : "cr0", "xer", "memory"); 201 : "cr0", "xer", "memory");
200 202
@@ -211,14 +213,14 @@ static inline long __arch_write_trylock(arch_rwlock_t *rw)
211 213
212 token = WRLOCK_TOKEN; 214 token = WRLOCK_TOKEN;
213 __asm__ __volatile__( 215 __asm__ __volatile__(
214"1: lwarx %0,0,%2\n\ 216"1: " PPC_LWARX(%0,0,%2,1) "\n\
215 cmpwi 0,%0,0\n\ 217 cmpwi 0,%0,0\n\
216 bne- 2f\n" 218 bne- 2f\n"
217 PPC405_ERR77(0,%1) 219 PPC405_ERR77(0,%1)
218" stwcx. %1,0,%2\n\ 220" stwcx. %1,0,%2\n\
219 bne- 1b\n\ 221 bne- 1b\n"
220 isync\n\ 222 PPC_ACQUIRE_BARRIER
2212:" : "=&r" (tmp) 223"2:" : "=&r" (tmp)
222 : "r" (token), "r" (&rw->lock) 224 : "r" (token), "r" (&rw->lock)
223 : "cr0", "memory"); 225 : "cr0", "memory");
224 226
@@ -269,7 +271,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
269 271
270 __asm__ __volatile__( 272 __asm__ __volatile__(
271 "# read_unlock\n\t" 273 "# read_unlock\n\t"
272 LWSYNC_ON_SMP 274 PPC_RELEASE_BARRIER
273"1: lwarx %0,0,%1\n\ 275"1: lwarx %0,0,%1\n\
274 addic %0,%0,-1\n" 276 addic %0,%0,-1\n"
275 PPC405_ERR77(0,%1) 277 PPC405_ERR77(0,%1)
@@ -283,7 +285,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
283static inline void arch_write_unlock(arch_rwlock_t *rw) 285static inline void arch_write_unlock(arch_rwlock_t *rw)
284{ 286{
285 __asm__ __volatile__("# write_unlock\n\t" 287 __asm__ __volatile__("# write_unlock\n\t"
286 LWSYNC_ON_SMP: : :"memory"); 288 PPC_RELEASE_BARRIER: : :"memory");
287 rw->lock = 0; 289 rw->lock = 0;
288} 290}
289 291