1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* GENcopy_to_user.S: Generic sparc64 copy to userspace.
3  *
4  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
5  */
6 
7 #define EX_ST(x,y)		\
8 98:	x;			\
9 	.section __ex_table,"a";\
10 	.align 4;		\
11 	.word 98b, y;		\
12 	.text;			\
13 	.align 4;
14 
15 #ifndef ASI_AIUS
16 #define ASI_AIUS	0x11
17 #endif
18 
19 #define FUNC_NAME		GENcopy_to_user
20 #define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
21 #define EX_RETVAL(x)		0
22 
23 #ifdef __KERNEL__
24 	/* Writing to %asi is _expensive_ so we hardcode it.
25 	 * Reading %asi to check for KERNEL_DS is comparatively
26 	 * cheap.
27 	 */
28 #define PREAMBLE					\
29 	rd		%asi, %g1;			\
30 	cmp		%g1, ASI_AIUS;			\
31 	bne,pn		%icc, raw_copy_in_user;		\
32 	 nop
33 #endif
34 
35 #include "GENmemcpy.S"
36