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| author | David S. Miller <davem@davemloft.net> | 2007-08-16 01:47:25 -0700 |
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| committer | David S. Miller <davem@davemloft.net> | 2007-08-16 01:47:25 -0700 |
| commit | cf5adce11743e98739fcb97e76d688f0b0bc2199 (patch) | |
| tree | 3cea4d74363a6570bbe5aaf4e723e3c256ffb591 /arch/sparc64/lib/NG2patch.S | |
| parent | 0fdb7f96d8c27e37ed2ca1ae5a763baf14b8fe0c (diff) | |
| download | linux-cf5adce11743e98739fcb97e76d688f0b0bc2199.tar.gz linux-cf5adce11743e98739fcb97e76d688f0b0bc2199.tar.bz2 linux-cf5adce11743e98739fcb97e76d688f0b0bc2199.zip | |
[SPARC64]: Niagara-2 optimized copies.
The bzero/memset implementation stays the same as Niagara-1.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/lib/NG2patch.S')
| -rw-r--r-- | arch/sparc64/lib/NG2patch.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc64/lib/NG2patch.S b/arch/sparc64/lib/NG2patch.S new file mode 100644 index 000000000000..28c36f06a6d1 --- /dev/null +++ b/arch/sparc64/lib/NG2patch.S @@ -0,0 +1,33 @@ +/* NG2patch.S: Patch Ultra-I routines with Niagara-2 variant. + * + * Copyright (C) 2007 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; \ + 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 niagara2_patch_copyops + .type niagara2_patch_copyops,#function +niagara2_patch_copyops: + NG_DO_PATCH(memcpy, NG2memcpy) + NG_DO_PATCH(___copy_from_user, NG2copy_from_user) + NG_DO_PATCH(___copy_to_user, NG2copy_to_user) + retl + nop + .size niagara2_patch_copyops,.-niagara2_patch_copyops |