| Greentime Hu | ace02e2 | 2017-10-25 14:27:22 +0800 | [diff] [blame] | 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 | USER( lbi.bi, \dst, [\addr], \adj) |
| 10 | .endm |
| 11 | |
| 12 | .macro sbi1 src, addr, adj |
| 13 | sbi.bi \src, [\addr], \adj |
| 14 | .endm |
| 15 | |
| 16 | .macro lmw1 start_reg, addr, end_reg |
| 17 | USER( lmw.bim, \start_reg, [\addr], \end_reg) |
| 18 | .endm |
| 19 | |
| 20 | .macro smw1 start_reg, addr, end_reg |
| 21 | smw.bim \start_reg, [\addr], \end_reg |
| 22 | .endm |
| 23 | |
| 24 | |
| 25 | /* Prototype: int __arch_copy_from_user(void *to, const char *from, size_t n) |
| 26 | * Purpose : copy a block from user memory to kernel memory |
| 27 | * Params : to - kernel memory |
| 28 | * : from - user memory |
| 29 | * : n - number of bytes to copy |
| 30 | * Returns : Number of bytes NOT copied. |
| 31 | */ |
| 32 | |
| 33 | .text |
| 34 | ENTRY(__arch_copy_from_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_from_user) |