X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=arch%2Fsparc%2Flib%2FU3copy_to_user.S;fp=arch%2Fsparc%2Flib%2FU3copy_to_user.S;h=2334f111bb0c81c36f4b1016725a238650e28d97;hb=478b8fecda511942404ac232897a718cecd13e48;hp=0000000000000000000000000000000000000000;hpb=18269c0fd4db9bec2668f895f21d742486ccb90f;p=linux-2.6-omap-h63xx.git

diff --git a/arch/sparc/lib/U3copy_to_user.S b/arch/sparc/lib/U3copy_to_user.S
new file mode 100644
index 00000000000..2334f111bb0
--- /dev/null
+++ b/arch/sparc/lib/U3copy_to_user.S
@@ -0,0 +1,33 @@
+/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace.
+ *
+ * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
+ */
+
+#define EX_ST(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		U3copy_to_user
+#define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
+#define STORE_BLK(src,addr)	stda src, [addr] ASI_BLK_AIUS
+#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 "U3memcpy.S"