/* * 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/constants.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 LOADREGS(fd, 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