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/* $OpenBSD: start.S,v 1.1 2006/07/28 17:12:06 kettenis Exp $ */
/* $NetBSD: srtbegin.S,v 1.7 2005/12/11 12:17:10 christos Exp $ */
/*
* Copyright (c) 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
#include <machine/asm.h>
#include <arm/armreg.h>
#define STACKSIZE 8192
ENTRY(start)
/*
* We assume we've been loaded VA==PA, or that the MMU
* is disabled. Make sure the MMU is disabled so that
* we don't have to care about the caches.
*/
/* Clear the BSS. */
adr r1, Lbss
ldmia r1, {r1, r2}
sub r2, r2, r1
mov r3, #0
1: strb r3, [r1], #0x01
subs r2, r2, #0x01
bgt 1b
/* Set the stack pointer */
adr r1, Lstack
ldr r1, [r1]
add sp, r1, #STACKSIZE
b _C_LABEL(main)
Ltext:
.word _C_LABEL(__text_store)
.word _C_LABEL(start)
.word _C_LABEL(_etext)
Ldata:
.word _C_LABEL(__data_store)
.word _C_LABEL(__data_start)
Lbss:
.word _C_LABEL(_edata)
.word _C_LABEL(_end)
Lstack:
.word Lstackspace
.comm Lstackspace, STACKSIZE
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