This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sparc64 / lib / U3patch.S

diff --git a/arch/sparc64/lib/U3patch.S b/arch/sparc64/lib/U3patch.S
new file mode 100644 (file)
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+++ b/arch/sparc64/lib/U3patch.S
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+/* 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; \
+       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  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