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| author | Anton Altaparmakov <aia21@cantab.net> | 2006-03-23 14:50:51 +0000 |
|---|---|---|
| committer | Anton Altaparmakov <aia21@cantab.net> | 2006-03-23 14:50:51 +0000 |
| commit | b4d8d1a93c6ea042b29bb66fbb1cf6bc556c18f7 (patch) | |
| tree | 030ef62361042d1a034087ad9a726db3b57bba72 /arch/sparc64/lib/NGcopy_to_user.S | |
| parent | bb8047d3540affd6b8c2adac3fe792e07143be0f (diff) | |
| parent | 2e6e33bab6e1996a5dec9108fb467b52b841e7a8 (diff) | |
| download | op-kernel-dev-b4d8d1a93c6ea042b29bb66fbb1cf6bc556c18f7.zip op-kernel-dev-b4d8d1a93c6ea042b29bb66fbb1cf6bc556c18f7.tar.gz | |
Merge branch 'master' of /usr/src/ntfs-2.6/
Diffstat (limited to 'arch/sparc64/lib/NGcopy_to_user.S')
| -rw-r--r-- | arch/sparc64/lib/NGcopy_to_user.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/sparc64/lib/NGcopy_to_user.S b/arch/sparc64/lib/NGcopy_to_user.S new file mode 100644 index 0000000..34112d5 --- /dev/null +++ b/arch/sparc64/lib/NGcopy_to_user.S @@ -0,0 +1,40 @@ +/* NGcopy_to_user.S: Niagara optimized copy to userspace. + * + * Copyright (C) 2006 David S. Miller (davem@davemloft.net) + */ + +#define EX_ST(x) \ +98: x; \ + .section .fixup; \ + .align 4; \ +99: wr %g0, ASI_AIUS, %asi;\ + retl; \ + mov 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) 0 + +#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" |
