config root man

/*-
 * Copyright (c) 2008 John Hay.  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.
 *
 * 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.
 *
 * $FreeBSD: release/9.1.0/sys/boot/arm/ixp425/boot2/arm_init.S 186352 2008-12-20 03:26:09Z sam $
 */

#include <machine/asm.h>

ASENTRY_NP(start)
/* Initialise bss and sp */
	nop
	adr	r1, .Lstart
	ldmia	r1, {r1, r2, sp}	/* Set initial stack and */
	sub	r2, r2, r1		/* get zero init data */
	mov	r3, #0
.L1:
	str	r3, [r1], #0x0004	/* get zero init data */
	subs	r2, r2, #4
	bgt	.L1

	.extern	main
	bl	main
/* main should not return.  If it does, spin forever		*/
infiniteLoop:
	b	infiniteLoop

.Lstart:
	.word	_edata
	.word	_end
	.word	BOOT_STACK

ENTRY(cpu_id)
	mrc	p15, 0, r0, c0, c0, 0
	RET

/* End */