GENcopy_to_user.S revision 478b8fecda511942404ac232897a718cecd13e48 
1/* GENcopy_to_user.S: Generic sparc64 copy to userspace.
2 *
3 * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
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#ifndef ASI_AIUS
19#define ASI_AIUS	0x11
20#endif
21
22#define FUNC_NAME		GENcopy_to_user
23#define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
24#define EX_RETVAL(x)		0
25
26#ifdef __KERNEL__
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, memcpy_user_stub;		\
35	 nop
36#endif
37
38#include "GENmemcpy.S"
39