| /* |
| * Copyright (C) 2012 ARM Ltd. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <linux/linkage.h> |
| #include <linux/const.h> |
| #include <asm/assembler.h> |
| #include <asm/page.h> |
| |
| /* |
| * Copy a page from src to dest (both are page aligned) |
| * |
| * Parameters: |
| * x0 - dest |
| * x1 - src |
| */ |
| ENTRY(copy_page) |
| /* Assume cache line size is 64 bytes. */ |
| prfm pldl1strm, [x1, #64] |
| 1: ldp x2, x3, [x1] |
| ldp x4, x5, [x1, #16] |
| ldp x6, x7, [x1, #32] |
| ldp x8, x9, [x1, #48] |
| add x1, x1, #64 |
| prfm pldl1strm, [x1, #64] |
| stnp x2, x3, [x0] |
| stnp x4, x5, [x0, #16] |
| stnp x6, x7, [x0, #32] |
| stnp x8, x9, [x0, #48] |
| add x0, x0, #64 |
| tst x1, #(PAGE_SIZE - 1) |
| b.ne 1b |
| ret |
| ENDPROC(copy_page) |
