1 files changed, 33 insertions, 0 deletions

diff --git a/arch/sparc/lib/U1copy_from_user.S b/arch/sparc/lib/U1copy_from_user.S
new file mode 100644
index 00000000000..3192b0bf4fa
--- /dev/null
+++ b/arch/sparc/lib/U1copy_from_user.S
@@ -0,0 +1,33 @@
+/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
+ *
+ * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
+ */
+
+#define EX_LD(x)                \
+98:     x;                      \
+        .section .fixup;        \
+        .align 4;               \
+99:     retl;                   \
+         mov    1, %o0;         \
+        .section __ex_table,"a";\
+        .align 4;               \
+        .word 98b, 99b;         \
+        .text;                  \
+        .align 4;
+
+#define FUNC_NAME               ___copy_from_user
+#define LOAD(type,addr,dest)    type##a [addr] %asi, dest
+#define LOAD_BLK(addr,dest)     ldda [addr] ASI_BLK_AIUS, dest
+#define EX_RETVAL(x)            0
+
+        /* Writing to %asi is _expensive_ so we hardcode it.
+         * Reading %asi to check for KERNEL_DS is comparatively
+         * cheap.
+         */
+#define PREAMBLE                                        \
+        rd              %asi, %g1;                      \
+        cmp             %g1, ASI_AIUS;                  \
+        bne,pn          %icc, memcpy_user_stub;         \
+         nop;                                           \
+
+#include "U1memcpy.S"