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authorSam Ravnborg <sam@ravnborg.org>2008-12-03 14:10:25 +0300
committerDavid S. Miller <davem@davemloft.net>2008-12-04 20:17:19 +0300
commit478b8fecda511942404ac232897a718cecd13e48 (patch)
treee022fce8ca92f93a000e1cd686255f0b126e9fd5 /arch/sparc/lib/bitops.S
parent18269c0fd4db9bec2668f895f21d742486ccb90f (diff)
downloadlinux-478b8fecda511942404ac232897a718cecd13e48.tar.xz
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/bitops.S')
-rw-r--r--arch/sparc/lib/bitops.S141
1 files changed, 141 insertions, 0 deletions
diff --git a/arch/sparc/lib/bitops.S b/arch/sparc/lib/bitops.S
new file mode 100644
index 000000000000..2b7228cb8c22
--- /dev/null
+++ b/arch/sparc/lib/bitops.S
@@ -0,0 +1,141 @@
+/* bitops.S: Sparc64 atomic bit operations.
+ *
+ * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net)
+ */
+
+#include <asm/asi.h>
+#include <asm/backoff.h>
+
+ .text
+
+ .globl test_and_set_bit
+ .type test_and_set_bit,#function
+test_and_set_bit: /* %o0=nr, %o1=addr */
+ BACKOFF_SETUP(%o3)
+ srlx %o0, 6, %g1
+ mov 1, %o2
+ sllx %g1, 3, %g3
+ and %o0, 63, %g2
+ sllx %o2, %g2, %o2
+ add %o1, %g3, %o1
+1: ldx [%o1], %g7
+ or %g7, %o2, %g1
+ casx [%o1], %g7, %g1
+ cmp %g7, %g1
+ bne,pn %xcc, 2f
+ and %g7, %o2, %g2
+ clr %o0
+ movrne %g2, 1, %o0
+ retl
+ nop
+2: BACKOFF_SPIN(%o3, %o4, 1b)
+ .size test_and_set_bit, .-test_and_set_bit
+
+ .globl test_and_clear_bit
+ .type test_and_clear_bit,#function
+test_and_clear_bit: /* %o0=nr, %o1=addr */
+ BACKOFF_SETUP(%o3)
+ srlx %o0, 6, %g1
+ mov 1, %o2
+ sllx %g1, 3, %g3
+ and %o0, 63, %g2
+ sllx %o2, %g2, %o2
+ add %o1, %g3, %o1
+1: ldx [%o1], %g7
+ andn %g7, %o2, %g1
+ casx [%o1], %g7, %g1
+ cmp %g7, %g1
+ bne,pn %xcc, 2f
+ and %g7, %o2, %g2
+ clr %o0
+ movrne %g2, 1, %o0
+ retl
+ nop
+2: BACKOFF_SPIN(%o3, %o4, 1b)
+ .size test_and_clear_bit, .-test_and_clear_bit
+
+ .globl test_and_change_bit
+ .type test_and_change_bit,#function
+test_and_change_bit: /* %o0=nr, %o1=addr */
+ BACKOFF_SETUP(%o3)
+ srlx %o0, 6, %g1
+ mov 1, %o2
+ sllx %g1, 3, %g3
+ and %o0, 63, %g2
+ sllx %o2, %g2, %o2
+ add %o1, %g3, %o1
+1: ldx [%o1], %g7
+ xor %g7, %o2, %g1
+ casx [%o1], %g7, %g1
+ cmp %g7, %g1
+ bne,pn %xcc, 2f
+ and %g7, %o2, %g2
+ clr %o0
+ movrne %g2, 1, %o0
+ retl
+ nop
+2: BACKOFF_SPIN(%o3, %o4, 1b)
+ .size test_and_change_bit, .-test_and_change_bit
+
+ .globl set_bit
+ .type set_bit,#function
+set_bit: /* %o0=nr, %o1=addr */
+ BACKOFF_SETUP(%o3)
+ srlx %o0, 6, %g1
+ mov 1, %o2
+ sllx %g1, 3, %g3
+ and %o0, 63, %g2
+ sllx %o2, %g2, %o2
+ add %o1, %g3, %o1
+1: ldx [%o1], %g7
+ or %g7, %o2, %g1
+ casx [%o1], %g7, %g1
+ cmp %g7, %g1
+ bne,pn %xcc, 2f
+ nop
+ retl
+ nop
+2: BACKOFF_SPIN(%o3, %o4, 1b)
+ .size set_bit, .-set_bit
+
+ .globl clear_bit
+ .type clear_bit,#function
+clear_bit: /* %o0=nr, %o1=addr */
+ BACKOFF_SETUP(%o3)
+ srlx %o0, 6, %g1
+ mov 1, %o2
+ sllx %g1, 3, %g3
+ and %o0, 63, %g2
+ sllx %o2, %g2, %o2
+ add %o1, %g3, %o1
+1: ldx [%o1], %g7
+ andn %g7, %o2, %g1
+ casx [%o1], %g7, %g1
+ cmp %g7, %g1
+ bne,pn %xcc, 2f
+ nop
+ retl
+ nop
+2: BACKOFF_SPIN(%o3, %o4, 1b)
+ .size clear_bit, .-clear_bit
+
+ .globl change_bit
+ .type change_bit,#function
+change_bit: /* %o0=nr, %o1=addr */
+ BACKOFF_SETUP(%o3)
+ srlx %o0, 6, %g1
+ mov 1, %o2
+ sllx %g1, 3, %g3
+ and %o0, 63, %g2
+ sllx %o2, %g2, %o2
+ add %o1, %g3, %o1
+1: ldx [%o1], %g7
+ xor %g7, %o2, %g1
+ casx [%o1], %g7, %g1
+ cmp %g7, %g1
+ bne,pn %xcc, 2f
+ nop
+ retl
+ nop
+2: BACKOFF_SPIN(%o3, %o4, 1b)
+ .size change_bit, .-change_bit