1 files changed, 43 insertions, 0 deletions

diff --git a/arch/sparc/lib/NG4patch.S b/arch/sparc/lib/NG4patch.S
new file mode 100644
index 000000000000..c21c34c61dda
--- /dev/null
+++ b/arch/sparc/lib/NG4patch.S
@@ -0,0 +1,43 @@
+/* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant.
+ *
+ * Copyright (C) 2012 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  niagara4_patch_copyops
+        .type   niagara4_patch_copyops,#function
+niagara4_patch_copyops:
+        NG_DO_PATCH(memcpy, NG4memcpy)
+        NG_DO_PATCH(___copy_from_user, NG4copy_from_user)
+        NG_DO_PATCH(___copy_to_user, NG4copy_to_user)
+        retl
+         nop
+        .size   niagara4_patch_copyops,.-niagara4_patch_copyops
+
+        .globl  niagara4_patch_pageops
+        .type   niagara4_patch_pageops,#function
+niagara4_patch_pageops:
+        NG_DO_PATCH(copy_user_page, NG4copy_user_page)
+        NG_DO_PATCH(_clear_page, NGclear_page)
+        NG_DO_PATCH(clear_user_page, NGclear_user_page)
+        retl
+         nop
+        .size   niagara4_patch_pageops,.-niagara4_patch_pageops