aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc/lib/U1copy_from_user.S
diff options
context:
space:
mode:
authorSam Ravnborg <sam@ravnborg.org>2008-12-03 06:10:25 -0500
committerDavid S. Miller <davem@davemloft.net>2008-12-04 12:17:19 -0500
commit478b8fecda511942404ac232897a718cecd13e48 (patch)
treee022fce8ca92f93a000e1cd686255f0b126e9fd5 /arch/sparc/lib/U1copy_from_user.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/U1copy_from_user.S')
-rw-r--r--arch/sparc/lib/U1copy_from_user.S33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc/lib/U1copy_from_user.S b/arch/sparc/lib/U1copy_from_user.S
new file mode 100644
index 000000000000..3192b0bf4fab
--- /dev/null
+++ b/arch/sparc/lib/U1copy_from_user.S
@@ -0,0 +1,33 @@
1/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
2 *
3 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
4 */
5
6#define EX_LD(x) \
798: x; \
8 .section .fixup; \
9 .align 4; \
1099: retl; \
11 mov 1, %o0; \
12 .section __ex_table,"a";\
13 .align 4; \
14 .word 98b, 99b; \
15 .text; \
16 .align 4;
17
18#define FUNC_NAME ___copy_from_user
19#define LOAD(type,addr,dest) type##a [addr] %asi, dest
20#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest
21#define EX_RETVAL(x) 0
22
23 /* Writing to %asi is _expensive_ so we hardcode it.
24 * Reading %asi to check for KERNEL_DS is comparatively
25 * cheap.
26 */
27#define PREAMBLE \
28 rd %asi, %g1; \
29 cmp %g1, ASI_AIUS; \
30 bne,pn %icc, memcpy_user_stub; \
31 nop; \
32
33#include "U1memcpy.S"