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| author | Linus Torvalds | 2005-04-17 00:20:36 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2005-04-17 00:20:36 +0200 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc64/lib/U1copy_from_user.S | |
| download | kernel-qcow2-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel-qcow2-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz kernel-qcow2-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip | |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/sparc64/lib/U1copy_from_user.S')
| -rw-r--r-- | arch/sparc64/lib/U1copy_from_user.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc64/lib/U1copy_from_user.S b/arch/sparc64/lib/U1copy_from_user.S new file mode 100644 index 000000000000..93146a81e2d3 --- /dev/null +++ b/arch/sparc64/lib/U1copy_from_user.S @@ -0,0 +1,33 @@ +/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace. + * + * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) + */ + +#define EX_LD(x) \ +98: x; \ + .section .fixup; \ + .align 4; \ +99: retl; \ + mov 1, %o0; \ + .section __ex_table; \ + .align 4; \ + .word 98b, 99b; \ + .text; \ + .align 4; + +#define FUNC_NAME ___copy_from_user +#define LOAD(type,addr,dest) type##a [addr] %asi, dest +#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest +#define EX_RETVAL(x) 0 + + /* 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; \ + +#include "U1memcpy.S" |