[SPARC64]: Niagara-2 optimized copies.

The bzero/memset implementation stays the same as Niagara-1.

Signed-off-by: David S. Miller <davem@davemloft.net>

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