NetBSD/sys/arch/arm/arm32/bcopy_page.S

153 lines
3.6 KiB
ArmAsm

/* $NetBSD: bcopy_page.S,v 1.1 2001/03/04 08:25:39 matt Exp $ */
/*
* Copyright (c) 1995 Scott Stevens
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Scott Stevens.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* RiscBSD kernel project
*
* bcopy_page.S
*
* page optimised bcopy and bzero routines
*
* Created : 08/04/95
*/
#include <machine/param.h>
#include <machine/asm.h>
/*
* bcopy_page(src, dest)
*
* Optimised copy page routine.
*
* On entry:
* r0 - src address
* r1 - dest address
*
* Requires:
* number of bytes per page (NBPG) is a multiple of 512
*/
ENTRY(bcopy_page)
stmfd sp!, {r4-r10, lr}
mov r2, #(NBPG >> 9)
Lloopcopy:
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
subs r2, r2, #1
bne Lloopcopy
ldmfd sp!, {r4-r10, pc}
/*
* bzero_page(dest)
*
* Optimised zero page routine.
*
* On entry:
* r0 - dest address
*
* Requires:
* number of bytes per page (NBPG) is a multiple of 512
*/
ENTRY(bzero_page)
stmfd sp!, {r4-r10, lr}
mov r2, #(NBPG >> 9)
mov r3, #0
mov r4, #0
mov r5, #0
mov r6, #0
mov r7, #0
mov r8, #0
mov r9, #0
mov r10, #0
Lloopzero:
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
stmia r0!, {r3-r10}
subs r2, r2, #1
bne Lloopzero
ldmfd sp!, {r4-r10, pc}