#include <linux/config.h>
#include <asm/asi.h>
+ .text
+
/* On SMP we need to use memory barriers to ensure
* correct memory operation ordering, nop these out
* for uniprocessor.
*/
+
#ifdef CONFIG_SMP
#define BITOP_PRE_BARRIER membar #StoreLoad | #LoadLoad
-#define BITOP_POST_BARRIER membar #StoreLoad | #StoreStore
+#define BITOP_POST_BARRIER \
+ ba,pt %xcc, 80b; \
+ membar #StoreLoad | #StoreStore
+
+80: retl
+ nop
#else
-#define BITOP_PRE_BARRIER nop
-#define BITOP_POST_BARRIER nop
+#define BITOP_PRE_BARRIER
+#define BITOP_POST_BARRIER
#endif
- .text
-
.globl test_and_set_bit
.type test_and_set_bit,#function
test_and_set_bit: /* %o0=nr, %o1=addr */
cmp %g7, %g1
bne,pn %xcc, 1b
and %g7, %o2, %g2
- BITOP_POST_BARRIER
clr %o0
+ movrne %g2, 1, %o0
+ BITOP_POST_BARRIER
retl
- movrne %g2, 1, %o0
+ nop
.size test_and_set_bit, .-test_and_set_bit
.globl test_and_clear_bit
cmp %g7, %g1
bne,pn %xcc, 1b
and %g7, %o2, %g2
- BITOP_POST_BARRIER
clr %o0
+ movrne %g2, 1, %o0
+ BITOP_POST_BARRIER
retl
- movrne %g2, 1, %o0
+ nop
.size test_and_clear_bit, .-test_and_clear_bit
.globl test_and_change_bit
cmp %g7, %g1
bne,pn %xcc, 1b
and %g7, %o2, %g2
- BITOP_POST_BARRIER
clr %o0
+ movrne %g2, 1, %o0
+ BITOP_POST_BARRIER
retl
- movrne %g2, 1, %o0
+ nop
.size test_and_change_bit, .-test_and_change_bit
.globl set_bit