diff options
| author | David S. Miller <davem@sunset.davemloft.net> | 2006-03-05 16:41:56 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 01:11:42 -0800 |
| commit | 398d10830843bda7798f71052b54a5341a8ddd53 (patch) | |
| tree | 3c2f7da709f2f5e21fe3e5678276eae2d665735f /arch/sparc64/lib/NGpatch.S | |
| parent | 30ddbdb03339fc62480ddbff800a44066bb14455 (diff) | |
[SPARC64]: Niagara optimized memcpy() and copy_{to,from}_user().
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/lib/NGpatch.S')
| -rw-r--r-- | arch/sparc64/lib/NGpatch.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/sparc64/lib/NGpatch.S b/arch/sparc64/lib/NGpatch.S new file mode 100644 index 00000000000..f13ec9e4c8a --- /dev/null +++ b/arch/sparc64/lib/NGpatch.S @@ -0,0 +1,32 @@ +/* NGpatch.S: Patch Ultra-I routines with Niagara variant. + * + * Copyright (C) 2006 David S. Miller <davem@davemloft.net> + */ + +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define NG_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 niagara_patch_copyops + .type niagara_patch_copyops,#function +niagara_patch_copyops: + NG_DO_PATCH(memcpy, NGmemcpy) + NG_DO_PATCH(___copy_from_user, NGcopy_from_user) + NG_DO_PATCH(___copy_to_user, NGcopy_to_user) + retl + nop + .size niagara_patch_copyops,.-niagara_patch_copyops |