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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-31 08:19:48 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-31 08:19:48 +0100 |
| commit | 818fa7f3908c7bd6c0045e9d94dc23a899ef6144 (patch) | |
| tree | ad3435c3f57c8222ad61709b716168932f13be6c /arch/sparc/lib/U3patch.S | |
| parent | 3fd4bc015ef879a7d2b955ce97fb125e3a51ba7e (diff) | |
| parent | 5fdf7e5975a0b0f6a0370655612c5dca3fd6311b (diff) | |
| download | op-kernel-dev-818fa7f3908c7bd6c0045e9d94dc23a899ef6144.zip op-kernel-dev-818fa7f3908c7bd6c0045e9d94dc23a899ef6144.tar.gz | |
Merge branch 'tracing/kmemtrace' into tracing/kmemtrace2
Diffstat (limited to 'arch/sparc/lib/U3patch.S')
| -rw-r--r-- | arch/sparc/lib/U3patch.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc/lib/U3patch.S b/arch/sparc/lib/U3patch.S new file mode 100644 index 0000000..ecc3026 --- /dev/null +++ b/arch/sparc/lib/U3patch.S @@ -0,0 +1,33 @@ +/* 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; \ + sll %g1, 11, %g1; \ + srl %g1, 11 + 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 |
