1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* NG2copy_from_user.S: Niagara-2 optimized copy from userspace.
3  *
4  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
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##_fp;	\
20 	.text;			\
21 	.align 4;
22 
23 #ifndef ASI_AIUS
24 #define ASI_AIUS	0x11
25 #endif
26 
27 #ifndef ASI_BLK_AIUS_4V
28 #define ASI_BLK_AIUS_4V	0x17
29 #endif
30 
31 #define FUNC_NAME		NG2copy_from_user
32 #define LOAD(type,addr,dest)	type##a [addr] %asi, dest
33 #define LOAD_BLK(addr,dest)	ldda [addr] ASI_BLK_AIUS_4V, dest
34 #define EX_RETVAL(x)		0
35 
36 #ifdef __KERNEL__
37 #define PREAMBLE					\
38 	rd		%asi, %g1;			\
39 	cmp		%g1, ASI_AIUS;			\
40 	bne,pn		%icc, raw_copy_in_user;		\
41 	 nop
42 #endif
43 
44 #include "NG2memcpy.S"
45