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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/NGcopy_from_user.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/NGcopy_from_user.S')
-rw-r--r--arch/sparc/lib/NGcopy_from_user.S37
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/sparc/lib/NGcopy_from_user.S b/arch/sparc/lib/NGcopy_from_user.S
new file mode 100644
index 000000000000..e7f433f71b42
--- /dev/null
+++ b/arch/sparc/lib/NGcopy_from_user.S
@@ -0,0 +1,37 @@
+/* NGcopy_from_user.S: Niagara optimized copy from userspace.
+ *
+ * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
+ */
+
+#define EX_LD(x) \
+98: x; \
+ .section .fixup; \
+ .align 4; \
+99: wr %g0, ASI_AIUS, %asi;\
+ ret; \
+ restore %g0, 1, %o0; \
+ .section __ex_table,"a";\
+ .align 4; \
+ .word 98b, 99b; \
+ .text; \
+ .align 4;
+
+#ifndef ASI_AIUS
+#define ASI_AIUS 0x11
+#endif
+
+#define FUNC_NAME NGcopy_from_user
+#define LOAD(type,addr,dest) type##a [addr] ASI_AIUS, dest
+#define LOAD_TWIN(addr_reg,dest0,dest1) \
+ ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_AIUS, dest0
+#define EX_RETVAL(x) %g0
+
+#ifdef __KERNEL__
+#define PREAMBLE \
+ rd %asi, %g1; \
+ cmp %g1, ASI_AIUS; \
+ bne,pn %icc, memcpy_user_stub; \
+ nop
+#endif
+
+#include "NGmemcpy.S"