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Import of OpenBSD 4.2 release kernel tree with initial code to support 
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO

Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)

/*	$OpenBSD: boot.c,v 1.6 2003/08/14 17:13:57 deraadt Exp $	*/
/*	$NetBSD: boot.c,v 1.2 1997/09/14 19:27:21 pk Exp $	*/

/*-
 * Copyright (c) 1982, 1986, 1990, 1993
 *	The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 * 	@(#)boot.c	8.1 (Berkeley) 6/10/93
 */

#include <sys/param.h>
#include <sys/reboot.h>
#include <a.out.h>
#include <lib/libsa/stand.h>

#include <sparc/stand/common/promdev.h>

void copyunix(int, char *);
void promsyms(int, struct exec *);
int debug;
int netif_debug;

/*
 * Boot device is derived from ROM provided information.
 */
#define	DEFAULT_KERNEL	"bsd"

extern char	*version;
extern vaddr_t	esym;
char		fbuf[80], dbuf[128];

typedef void (*entry_t)(caddr_t, int, int, int, long, long);
int loadfile(int, vaddr_t *);

main(int argc, char *argv[])
{
	int	io;
	char	*file;
	entry_t entry;

	prom_init();

	printf(">> OpenBSD BOOT %s\n", version);

	file = prom_bootfile;
	if (file == 0 || *file == 0)
		file = DEFAULT_KERNEL;

	for (;;) {
		if (prom_boothow & RB_ASKNAME) {
			printf("device[%s]: ", prom_bootdevice);
			gets(dbuf);
			if (dbuf[0])
				prom_bootdevice = dbuf;
			printf("boot: ");
			gets(fbuf);
			if (fbuf[0])
				file = fbuf;
		}
		if ((io = open(file, 0)) >= 0)
			break;
		printf("open: %s: %s\n", file, strerror(errno));
		prom_boothow |= RB_ASKNAME;
	}

	printf("Booting %s @ 0x%x\n", file, LOADADDR);
	loadfile(io, (vaddr_t *)&entry);

	/* Note: args 2-4 not used due to conflicts with SunOS loaders */
	(*entry)(cputyp == CPU_SUN4 ? LOADADDR : (caddr_t)promvec,
		 0, 0, 0, esym, DDB_MAGIC1);

	_rtt();
}