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authorSam Ravnborg <sam@ravnborg.org>2008-12-03 03:10:25 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-04 09:17:19 -0800
commit478b8fecda511942404ac232897a718cecd13e48 (patch)
treee022fce8ca92f93a000e1cd686255f0b126e9fd5 /arch/sparc/lib/atomic_64.S
parent18269c0fd4db9bec2668f895f21d742486ccb90f (diff)
sparc,sparc64: unify lib/
o Renamed files in sparc64 to <name>_64.S when identical to sparc32 files. o iomap.c were equal for sparc32 and sparc64 o adjusted sparc/Makefile now we have only one lib/ Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib/atomic_64.S')
-rw-r--r--arch/sparc/lib/atomic_64.S138
1 files changed, 138 insertions, 0 deletions
diff --git a/arch/sparc/lib/atomic_64.S b/arch/sparc/lib/atomic_64.S
new file mode 100644
index 00000000000..0268210ca16
--- /dev/null
+++ b/arch/sparc/lib/atomic_64.S
@@ -0,0 +1,138 @@
+/* atomic.S: These things are too big to do inline.
+ *
+ * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
+ */
+
+#include <asm/asi.h>
+#include <asm/backoff.h>
+
+ .text
+
+ /* Two versions of the atomic routines, one that
+ * does not return a value and does not perform
+ * memory barriers, and a second which returns
+ * a value and does the barriers.
+ */
+ .globl atomic_add
+ .type atomic_add,#function
+atomic_add: /* %o0 = increment, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: lduw [%o1], %g1
+ add %g1, %o0, %g7
+ cas [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %icc, 2f
+ nop
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic_add, .-atomic_add
+
+ .globl atomic_sub
+ .type atomic_sub,#function
+atomic_sub: /* %o0 = decrement, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: lduw [%o1], %g1
+ sub %g1, %o0, %g7
+ cas [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %icc, 2f
+ nop
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic_sub, .-atomic_sub
+
+ .globl atomic_add_ret
+ .type atomic_add_ret,#function
+atomic_add_ret: /* %o0 = increment, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: lduw [%o1], %g1
+ add %g1, %o0, %g7
+ cas [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %icc, 2f
+ add %g7, %o0, %g7
+ sra %g7, 0, %o0
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic_add_ret, .-atomic_add_ret
+
+ .globl atomic_sub_ret
+ .type atomic_sub_ret,#function
+atomic_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: lduw [%o1], %g1
+ sub %g1, %o0, %g7
+ cas [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %icc, 2f
+ sub %g7, %o0, %g7
+ sra %g7, 0, %o0
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic_sub_ret, .-atomic_sub_ret
+
+ .globl atomic64_add
+ .type atomic64_add,#function
+atomic64_add: /* %o0 = increment, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: ldx [%o1], %g1
+ add %g1, %o0, %g7
+ casx [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %xcc, 2f
+ nop
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic64_add, .-atomic64_add
+
+ .globl atomic64_sub
+ .type atomic64_sub,#function
+atomic64_sub: /* %o0 = decrement, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: ldx [%o1], %g1
+ sub %g1, %o0, %g7
+ casx [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %xcc, 2f
+ nop
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic64_sub, .-atomic64_sub
+
+ .globl atomic64_add_ret
+ .type atomic64_add_ret,#function
+atomic64_add_ret: /* %o0 = increment, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: ldx [%o1], %g1
+ add %g1, %o0, %g7
+ casx [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %xcc, 2f
+ add %g7, %o0, %g7
+ mov %g7, %o0
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic64_add_ret, .-atomic64_add_ret
+
+ .globl atomic64_sub_ret
+ .type atomic64_sub_ret,#function
+atomic64_sub_ret: /* %o0 = decrement, %o1 = atomic_ptr */
+ BACKOFF_SETUP(%o2)
+1: ldx [%o1], %g1
+ sub %g1, %o0, %g7
+ casx [%o1], %g1, %g7
+ cmp %g1, %g7
+ bne,pn %xcc, 2f
+ sub %g7, %o0, %g7
+ mov %g7, %o0
+ retl
+ nop
+2: BACKOFF_SPIN(%o2, %o3, 1b)
+ .size atomic64_sub_ret, .-atomic64_sub_ret