diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | sysdeps/sparc/sparc32/bits/atomic.h | 34 |
2 files changed, 41 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index 65cb6ba554..080caddf55 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2012-04-25 David S. Miller <davem@davemloft.net> + + * sysdeps/sparc/sparc32/bits/atomic.h: Include sysdep.h to get + HWCAP_* values only after the memory barriers have been defined. + (atomic_full_barrier): Define. + (atomic_read_barrier): Define. + (atomic_write_barrier): Define. + 2012-04-26 Siddhesh Poyarekar <siddhesh@redhat.com> * shlib-versions: Add libgcc_s version information. diff --git a/sysdeps/sparc/sparc32/bits/atomic.h b/sysdeps/sparc/sparc32/bits/atomic.h index 4f783fbc30..fb16fc29d5 100644 --- a/sysdeps/sparc/sparc32/bits/atomic.h +++ b/sysdeps/sparc/sparc32/bits/atomic.h @@ -21,7 +21,6 @@ #define _BITS_ATOMIC_H 1 #include <stdint.h> -#include <sysdep.h> typedef int8_t atomic8_t; typedef uint8_t uatomic8_t; @@ -231,6 +230,10 @@ volatile unsigned char __sparc32_atomic_locks[64] abort (); \ __v7_exchange_24_rel (mem, newval); }) +# define atomic_full_barrier() __asm ("" ::: "memory") +# define atomic_read_barrier() atomic_full_barrier () +# define atomic_write_barrier() atomic_full_barrier () + #else /* In libc.a/libpthread.a etc. we don't know if we'll be run on @@ -319,6 +322,35 @@ extern uint64_t _dl_hwcap __attribute__((weak)); __acev_w24ret = __v7_exchange_24_rel (mem, newval); \ __acev_w24ret; }) +#define atomic_full_barrier() \ + do { \ + if (__atomic_is_v9) \ + /* membar #LoadLoad | #LoadStore | #StoreLoad | #StoreStore */ \ + __asm __volatile (".word 0x8143e00f" : : : "memory"); \ + else \ + __asm __volatile ("" : : : "memory"); \ + } while (0) + +#define atomic_read_barrier() \ + do { \ + if (__atomic_is_v9) \ + /* membar #LoadLoad | #LoadStore */ \ + __asm __volatile (".word 0x8143e005" : : : "memory"); \ + else \ + __asm __volatile ("" : : : "memory"); \ + } while (0) + +#define atomic_write_barrier() \ + do { \ + if (__atomic_is_v9) \ + /* membar #StoreLoad | #StoreStore */ \ + __asm __volatile (".word 0x8143e00a" : : : "memory"); \ + else \ + __asm __volatile ("" : : : "memory"); \ + } while (0) + #endif +#include <sysdep.h> + #endif /* bits/atomic.h */ |