diff options
Diffstat (limited to 'include/asm-arm/spinlock.h')
| -rw-r--r-- | include/asm-arm/spinlock.h | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/include/asm-arm/spinlock.h b/include/asm-arm/spinlock.h index 6ed4f916b166..43ad4e55878c 100644 --- a/include/asm-arm/spinlock.h +++ b/include/asm-arm/spinlock.h @@ -30,6 +30,9 @@ static inline void __raw_spin_lock(raw_spinlock_t *lock) __asm__ __volatile__( "1: ldrex %0, [%1]\n" " teq %0, #0\n" +#ifdef CONFIG_CPU_32v6K +" wfene\n" +#endif " strexeq %0, %2, [%1]\n" " teqeq %0, #0\n" " bne 1b" @@ -65,7 +68,11 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lock) smp_mb(); __asm__ __volatile__( -" str %1, [%0]" +" str %1, [%0]\n" +#ifdef CONFIG_CPU_32v6K +" mcr p15, 0, %1, c7, c10, 4\n" /* DSB */ +" sev" +#endif : : "r" (&lock->lock), "r" (0) : "cc"); @@ -87,6 +94,9 @@ static inline void __raw_write_lock(raw_rwlock_t *rw) __asm__ __volatile__( "1: ldrex %0, [%1]\n" " teq %0, #0\n" +#ifdef CONFIG_CPU_32v6K +" wfene\n" +#endif " strexeq %0, %2, [%1]\n" " teq %0, #0\n" " bne 1b" @@ -122,7 +132,11 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw) smp_mb(); __asm__ __volatile__( - "str %1, [%0]" + "str %1, [%0]\n" +#ifdef CONFIG_CPU_32v6K +" mcr p15, 0, %1, c7, c10, 4\n" /* DSB */ +" sev\n" +#endif : : "r" (&rw->lock), "r" (0) : "cc"); @@ -148,6 +162,9 @@ static inline void __raw_read_lock(raw_rwlock_t *rw) "1: ldrex %0, [%2]\n" " adds %0, %0, #1\n" " strexpl %1, %0, [%2]\n" +#ifdef CONFIG_CPU_32v6K +" wfemi\n" +#endif " rsbpls %0, %1, #0\n" " bmi 1b" : "=&r" (tmp), "=&r" (tmp2) @@ -169,6 +186,11 @@ static inline void __raw_read_unlock(raw_rwlock_t *rw) " strex %1, %0, [%2]\n" " teq %1, #0\n" " bne 1b" +#ifdef CONFIG_CPU_32v6K +"\n cmp %0, #0\n" +" mcreq p15, 0, %0, c7, c10, 4\n" +" seveq" +#endif : "=&r" (tmp), "=&r" (tmp2) : "r" (&rw->lock) : "cc"); |