1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2005-2017 Andes Technology Corporation
3 
4 #include <linux/linkage.h>
5 #include <asm/assembler.h>
6 #include <asm/errno.h>
7 
8 .macro 	lbi1 dst, addr, adj
9 lbi.bi	\dst, [\addr], \adj
10 .endm
11 
12 .macro 	sbi1 src, addr, adj
13 USER( sbi.bi, \src, [\addr], \adj)
14 .endm
15 
16 .macro	lmw1 start_reg, addr, end_reg
17 lmw.bim \start_reg, [\addr], \end_reg
18 .endm
19 
20 .macro	smw1 start_reg, addr, end_reg
21 USER( smw.bim, \start_reg, [\addr], \end_reg)
22 .endm
23 
24 
25 /* Prototype: int __arch_copy_to_user(void *to, const char *from, size_t n)
26  * Purpose  : copy a block to user memory from kernel memory
27  * Params   : to   - user memory
28  *          : from - kernel memory
29  *          : n    - number of bytes to copy
30  * Returns  : Number of bytes NOT copied.
31  */
32 
33 .text
34 ENTRY(__arch_copy_to_user)
35 	add	$r5, $r0, $r2
36 #include "copy_template.S"
37 	move	$r0, $r2
38 	ret
39 .section .fixup,"ax"
40 .align  2
41 9001:
42 	sub	$r0, $r5, $r0
43 	ret
44 .previous
45 ENDPROC(__arch_copy_to_user)
46