| /* |
| * linux/arch/arm/lib/copypage.S |
| * |
| * Copyright (C) 1995-1999 Russell King |
| * |
| * 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. |
| * |
| * ASM optimised string functions |
| */ |
| #include <linux/linkage.h> |
| #include <linux/init.h> |
| #include <asm/assembler.h> |
| #include <asm/asm-offsets.h> |
| |
| .text |
| .align 5 |
| /* |
| * ARMv3 optimised copy_user_page |
| * |
| * FIXME: do we need to handle cache stuff... |
| */ |
| ENTRY(v3_copy_user_page) |
| stmfd sp!, {r4, lr} @ 2 |
| mov r2, #PAGE_SZ/64 @ 1 |
| ldmia r1!, {r3, r4, ip, lr} @ 4+1 |
| 1: stmia r0!, {r3, r4, ip, lr} @ 4 |
| ldmia r1!, {r3, r4, ip, lr} @ 4+1 |
| stmia r0!, {r3, r4, ip, lr} @ 4 |
| ldmia r1!, {r3, r4, ip, lr} @ 4+1 |
| stmia r0!, {r3, r4, ip, lr} @ 4 |
| ldmia r1!, {r3, r4, ip, lr} @ 4 |
| subs r2, r2, #1 @ 1 |
| stmia r0!, {r3, r4, ip, lr} @ 4 |
| ldmneia r1!, {r3, r4, ip, lr} @ 4 |
| bne 1b @ 1 |
| ldmfd sp!, {r4, pc} @ 3 |
| |
| .align 5 |
| /* |
| * ARMv3 optimised clear_user_page |
| * |
| * FIXME: do we need to handle cache stuff... |
| */ |
| ENTRY(v3_clear_user_page) |
| str lr, [sp, #-4]! |
| mov r1, #PAGE_SZ/64 @ 1 |
| mov r2, #0 @ 1 |
| mov r3, #0 @ 1 |
| mov ip, #0 @ 1 |
| mov lr, #0 @ 1 |
| 1: stmia r0!, {r2, r3, ip, lr} @ 4 |
| stmia r0!, {r2, r3, ip, lr} @ 4 |
| stmia r0!, {r2, r3, ip, lr} @ 4 |
| stmia r0!, {r2, r3, ip, lr} @ 4 |
| subs r1, r1, #1 @ 1 |
| bne 1b @ 1 |
| ldr pc, [sp], #4 |
| |
| __INITDATA |
| |
| .type v3_user_fns, #object |
| ENTRY(v3_user_fns) |
| .long v3_clear_user_page |
| .long v3_copy_user_page |
| .size v3_user_fns, . - v3_user_fns |
