1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
3  *
4  * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
5  */
6 
7 #define EX_LD(x,y)		\
8 98:	x;			\
9 	.section __ex_table,"a";\
10 	.align 4;		\
11 	.word 98b, y;		\
12 	.text;			\
13 	.align 4;
14 
15 #define EX_LD_FP(x,y)		\
16 98:	x;			\
17 	.section __ex_table,"a";\
18 	.align 4;		\
19 	.word 98b, y;		\
20 	.text;			\
21 	.align 4;
22 
23 #define FUNC_NAME		raw_copy_from_user
24 #define LOAD(type,addr,dest)	type##a [addr] %asi, dest
25 #define LOAD_BLK(addr,dest)	ldda [addr] ASI_BLK_AIUS, dest
26 #define EX_RETVAL(x)		0
27 
28 	/* Writing to %asi is _expensive_ so we hardcode it.
29 	 * Reading %asi to check for KERNEL_DS is comparatively
30 	 * cheap.
31 	 */
32 #define PREAMBLE					\
33 	rd		%asi, %g1;			\
34 	cmp		%g1, ASI_AIUS;			\
35 	bne,pn		%icc, raw_copy_in_user;		\
36 	 nop;						\
37 
38 #include "U1memcpy.S"
39