1/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace.
2 *
3 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
4 */
5
6#define EX_ST(x)		\
798:	x;			\
8	.section .fixup;	\
9	.align 4;		\
1099:	retl;			\
11	 mov	1, %o0;		\
12	.section __ex_table,"a";\
13	.align 4;		\
14	.word 98b, 99b;		\
15	.text;			\
16	.align 4;
17
18#define FUNC_NAME		U3copy_to_user
19#define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
20#define STORE_BLK(src,addr)	stda src, [addr] ASI_BLK_AIUS
21#define EX_RETVAL(x)		0
22
23	/* Writing to %asi is _expensive_ so we hardcode it.
24	 * Reading %asi to check for KERNEL_DS is comparatively
25	 * cheap.
26	 */
27#define PREAMBLE					\
28	rd		%asi, %g1;			\
29	cmp		%g1, ASI_AIUS;			\
30	bne,pn		%icc, memcpy_user_stub;		\
31	 nop;						\
32
33#include "U3memcpy.S"
34