config root man

/*-
 * Copyright (c) 2004-2010 Juli Mallett <jmallett@FreeBSD.org>
 * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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/mips/cavium/asm_octeon.S 224661 2011-08-05 22:54:42Z marcel $
 */

#include <machine/asm.h>

	.set noreorder

#ifdef SMP
/*
 * This function must be implemented in assembly because it is called early
 * in AP boot without a valid stack.
 */
LEAF(platform_processor_id)
	.set push
	.set mips32r2
	jr	ra
	rdhwr	v0, $0
	.set pop
END(platform_processor_id)

/*
 * Called on APs to wait until they are told to launch.
 */
LEAF(octeon_ap_wait)
	jal	platform_processor_id
	nop

1:	lld	t0, octeon_ap_boot
	bne	v0, t0, 1b
	nop

	move	t0, zero
	scd	t0, octeon_ap_boot

	beqz	t0, 1b
	nop

	j	mpentry
	nop
END(octeon_ap_wait)
#endif