diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-i386/atomic.h | 12 | ||||
| -rw-r--r-- | include/asm-x86_64/atomic.h | 12 |
2 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-i386/atomic.h b/include/asm-i386/atomic.h index de649d3aa2d4..e2c00c95a5e1 100644 --- a/include/asm-i386/atomic.h +++ b/include/asm-i386/atomic.h @@ -255,5 +255,17 @@ __asm__ __volatile__(LOCK "orl %0,%1" \ #define smp_mb__before_atomic_inc() barrier() #define smp_mb__after_atomic_inc() barrier() +/* ECC atomic, DMA, SMP and interrupt safe scrub function */ + +static __inline__ void atomic_scrub(unsigned long *virt_addr, u32 size) +{ + u32 i; + for (i = 0; i < size / 4; i++, virt_addr++) + /* Very carefully read and write to memory atomically + * so we are interrupt, DMA and SMP safe. + */ + __asm__ __volatile__("lock; addl $0, %0"::"m"(*virt_addr)); +} + #include <asm-generic/atomic.h> #endif diff --git a/include/asm-x86_64/atomic.h b/include/asm-x86_64/atomic.h index 4b5cd553e772..4048508c4f40 100644 --- a/include/asm-x86_64/atomic.h +++ b/include/asm-x86_64/atomic.h @@ -426,5 +426,17 @@ __asm__ __volatile__(LOCK "orl %0,%1" \ #define smp_mb__before_atomic_inc() barrier() #define smp_mb__after_atomic_inc() barrier() +/* ECC atomic, DMA, SMP and interrupt safe scrub function */ + +static __inline__ void atomic_scrub(u32 *virt_addr, u32 size) +{ + u32 i; + for (i = 0; i < size / 4; i++, virt_addr++) + /* Very carefully read and write to memory atomically + * so we are interrupt, DMA and SMP safe. + */ + __asm__ __volatile__("lock; addl $0, %0"::"m"(*virt_addr)); +} + #include <asm-generic/atomic.h> #endif |