1/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
2 *
3 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
4 */
5
6#define EX_LD(x)		\
798:	x;			\
8	.section __ex_table,"a";\
9	.align 4;		\
10	.word 98b, __retl_one;	\
11	.text;			\
12	.align 4;
13
14#define EX_LD_FP(x)		\
1598:	x;			\
16	.section __ex_table,"a";\
17	.align 4;		\
18	.word 98b, __retl_one_fp;\
19	.text;			\
20	.align 4;
21
22#define FUNC_NAME		___copy_from_user
23#define LOAD(type,addr,dest)	type##a [addr] %asi, dest
24#define LOAD_BLK(addr,dest)	ldda [addr] ASI_BLK_AIUS, dest
25#define EX_RETVAL(x)		0
26
27	/* Writing to %asi is _expensive_ so we hardcode it.
28	 * Reading %asi to check for KERNEL_DS is comparatively
29	 * cheap.
30	 */
31#define PREAMBLE					\
32	rd		%asi, %g1;			\
33	cmp		%g1, ASI_AIUS;			\
34	bne,pn		%icc, ___copy_in_user;		\
35	 nop;						\
36
37#include "U1memcpy.S"
38