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| author |  Sam Ravnborg <sam@ravnborg.org>
| 2008-12-03 03:10:25 -0800 |
|---|---|---|
| committer |  David S. Miller <davem@davemloft.net>
| 2008-12-04 09:17:19 -0800 |
| commit | 478b8fecda511942404ac232897a718cecd13e48 (patch) | |
| tree | e022fce8ca92f93a000e1cd686255f0b126e9fd5 /arch/sparc/lib/NGcopy_to_user.S | |
| parent | sparc: prepare lib/ for unification (diff) | |
| download | linux-478b8fecda511942404ac232897a718cecd13e48.tar.gz linux-478b8fecda511942404ac232897a718cecd13e48.tar.bz2 linux-478b8fecda511942404ac232897a718cecd13e48.zip | |
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_to_user.S')
| -rw-r--r-- | arch/sparc/lib/NGcopy_to_user.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/sparc/lib/NGcopy_to_user.S b/arch/sparc/lib/NGcopy_to_user.S new file mode 100644 index 000000000000..6ea01c5532a0 --- /dev/null +++ b/arch/sparc/lib/NGcopy_to_user.S @@ -0,0 +1,40 @@ +/* NGcopy_to_user.S: Niagara optimized copy to userspace. + * + * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) + */ + +#define EX_ST(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_to_user +#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS +#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS +#define EX_RETVAL(x) %g0 + +#ifdef __KERNEL__ + /* Writing to %asi is _expensive_ so we hardcode it. + * Reading %asi to check for KERNEL_DS is comparatively + * cheap. + */ +#define PREAMBLE \ + rd %asi, %g1; \ + cmp %g1, ASI_AIUS; \ + bne,pn %icc, memcpy_user_stub; \ + nop +#endif + +#include "NGmemcpy.S" |