mirror of https://gitee.com/openkylin/linux.git
46 lines
972 B
ArmAsm
46 lines
972 B
ArmAsm
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2005-2017 Andes Technology Corporation
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
#include <asm/errno.h>
|
|
|
|
.macro lbi1 dst, addr, adj
|
|
lbi.bi \dst, [\addr], \adj
|
|
.endm
|
|
|
|
.macro sbi1 src, addr, adj
|
|
USER( sbi.bi, \src, [\addr], \adj)
|
|
.endm
|
|
|
|
.macro lmw1 start_reg, addr, end_reg
|
|
lmw.bim \start_reg, [\addr], \end_reg
|
|
.endm
|
|
|
|
.macro smw1 start_reg, addr, end_reg
|
|
USER( smw.bim, \start_reg, [\addr], \end_reg)
|
|
.endm
|
|
|
|
|
|
/* Prototype: int __arch_copy_to_user(void *to, const char *from, size_t n)
|
|
* Purpose : copy a block to user memory from kernel memory
|
|
* Params : to - user memory
|
|
* : from - kernel memory
|
|
* : n - number of bytes to copy
|
|
* Returns : Number of bytes NOT copied.
|
|
*/
|
|
|
|
.text
|
|
ENTRY(__arch_copy_to_user)
|
|
add $r5, $r0, $r2
|
|
#include "copy_template.S"
|
|
move $r0, $r2
|
|
ret
|
|
.section .fixup,"ax"
|
|
.align 2
|
|
9001:
|
|
sub $r0, $r5, $r0
|
|
ret
|
|
.previous
|
|
ENDPROC(__arch_copy_to_user)
|