| /* |
| * linux/arch/m32r/mm/page.S |
| * |
| * Clear/Copy page with CPU |
| * |
| * Copyright (C) 2004 The Free Software Initiative of Japan |
| * |
| * Written by Niibe Yutaka |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| */ |
| .text |
| .global copy_page |
| /* |
| * copy_page (to, from) |
| * |
| * PAGE_SIZE = 4096-byte |
| * Cache line = 16-byte |
| * 16 * 256 |
| */ |
| .align 4 |
| copy_page: |
| ldi r2, #255 |
| ld r3, @r0 /* cache line allocate */ |
| ld r4, @r1+ |
| ld r5, @r1+ |
| ld r6, @r1+ |
| ld r7, @r1+ |
| .fillinsn |
| 0: |
| st r4, @r0 |
| st r5, @+r0 |
| st r6, @+r0 |
| st r7, @+r0 |
| ld r4, @r1+ |
| addi r0, #4 |
| ld r5, @r1+ |
| ld r6, @r1+ |
| ld r7, @r1+ |
| ld r3, @r0 /* cache line allocate */ |
| addi r2, #-1 |
| bnez r2, 0b |
| |
| st r4, @r0 |
| st r5, @+r0 |
| st r6, @+r0 |
| st r7, @+r0 |
| jmp r14 |
| |
| .text |
| .global clear_page |
| /* |
| * clear_page (to) |
| * |
| * PAGE_SIZE = 4096-byte |
| * Cache line = 16-byte |
| * 16 * 256 |
| */ |
| .align 4 |
| clear_page: |
| ldi r2, #255 |
| ldi r4, #0 |
| ld r3, @r0 /* cache line allocate */ |
| .fillinsn |
| 0: |
| st r4, @r0 |
| st r4, @+r0 |
| st r4, @+r0 |
| st r4, @+r0 |
| addi r0, #4 |
| ld r3, @r0 /* cache line allocate */ |
| addi r2, #-1 |
| bnez r2, 0b |
| |
| st r4, @r0 |
| st r4, @+r0 |
| st r4, @+r0 |
| st r4, @+r0 |
| jmp r14 |