1/* 2 * linux/arch/arm/lib/copypage.S 3 * 4 * Copyright (C) 1995-1999 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * ASM optimised string functions 11 */ 12#include <linux/linkage.h> 13#include <linux/init.h> 14#include <asm/assembler.h> 15#include <asm/asm-offsets.h> 16 17 .text 18 .align 5 19ENTRY(v3_copy_user_page) 20 stmfd sp!, {r4, lr} @ 2 21 mov r2, #PAGE_SZ/64 @ 1 22 ldmia r1!, {r3, r4, ip, lr} @ 4+1 231: stmia r0!, {r3, r4, ip, lr} @ 4 24 ldmia r1!, {r3, r4, ip, lr} @ 4+1 25 stmia r0!, {r3, r4, ip, lr} @ 4 26 ldmia r1!, {r3, r4, ip, lr} @ 4+1 27 stmia r0!, {r3, r4, ip, lr} @ 4 28 ldmia r1!, {r3, r4, ip, lr} @ 4 29 subs r2, r2, #1 @ 1 30 stmia r0!, {r3, r4, ip, lr} @ 4 31 ldmneia r1!, {r3, r4, ip, lr} @ 4 32 bne 1b @ 1 33 ldmfd sp!, {r4, pc} @ 3 34 35 .align 5 36ENTRY(v3_clear_user_page) 37 str lr, [sp, #-4]! 38 mov r1, #PAGE_SZ/64 @ 1 39 mov r2, #0 @ 1 40 mov r3, #0 @ 1 41 mov ip, #0 @ 1 42 mov lr, #0 @ 1 431: stmia r0!, {r2, r3, ip, lr} @ 4 44 stmia r0!, {r2, r3, ip, lr} @ 4 45 stmia r0!, {r2, r3, ip, lr} @ 4 46 stmia r0!, {r2, r3, ip, lr} @ 4 47 subs r1, r1, #1 @ 1 48 bne 1b @ 1 49 ldr pc, [sp], #4 50 51 __INITDATA 52 53 .type v3_user_fns, #object 54ENTRY(v3_user_fns) 55 .long v3_clear_user_page 56 .long v3_copy_user_page 57 .size v3_user_fns, . - v3_user_fns 58