diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc64/lib/U3patch.S | |
Linux-2.6.12-rc2v2.6.12-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/U3patch.S')
| -rw-r--r-- | arch/sparc64/lib/U3patch.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/sparc64/lib/U3patch.S b/arch/sparc64/lib/U3patch.S new file mode 100644 index 00000000000..e2b6c5e4b95 --- /dev/null +++ b/arch/sparc64/lib/U3patch.S @@ -0,0 +1,32 @@ +/* U3patch.S: Patch Ultra-I routines with Ultra-III variant. + * + * Copyright (C) 2004 David S. Miller <davem@redhat.com> + */ + +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define ULTRA3_DO_PATCH(OLD, NEW) \ + sethi %hi(NEW), %g1; \ + or %g1, %lo(NEW), %g1; \ + sethi %hi(OLD), %g2; \ + or %g2, %lo(OLD), %g2; \ + sub %g1, %g2, %g1; \ + sethi %hi(BRANCH_ALWAYS), %g3; \ + srl %g1, 2, %g1; \ + or %g3, %lo(BRANCH_ALWAYS), %g3; \ + or %g3, %g1, %g3; \ + stw %g3, [%g2]; \ + sethi %hi(NOP), %g3; \ + or %g3, %lo(NOP), %g3; \ + stw %g3, [%g2 + 0x4]; \ + flush %g2; + + .globl cheetah_patch_copyops + .type cheetah_patch_copyops,#function +cheetah_patch_copyops: + ULTRA3_DO_PATCH(memcpy, U3memcpy) + ULTRA3_DO_PATCH(___copy_from_user, U3copy_from_user) + ULTRA3_DO_PATCH(___copy_to_user, U3copy_to_user) + retl + nop + .size cheetah_patch_copyops,.-cheetah_patch_copyops |