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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: bugcrt.c,v 1.5 2003/08/20 00:25:08 deraadt Exp $ */

#include <sys/types.h>
#include <machine/prom.h>

#include "libbug.h"
#include "stand.h"

void __main(void);
void start(void);

struct mvmeprom_args bugargs = { 1 };	/* not in BSS */

	asm (".text");
	asm (".long _start-0x10");
	asm (".long _start");

void
start(void)
{
	register int dev_lun asm (MVMEPROM_REG_DEVLUN);
	register int ctrl_lun asm (MVMEPROM_REG_CTRLLUN);
	register int flags asm (MVMEPROM_REG_FLAGS);
	register int ctrl_addr asm (MVMEPROM_REG_CTRLADDR);
	register int entry asm (MVMEPROM_REG_ENTRY);
	register int conf_blk asm (MVMEPROM_REG_CONFBLK);
	register char *arg_start asm (MVMEPROM_REG_ARGSTART);
	register char *arg_end asm (MVMEPROM_REG_ARGEND);
	register char *nbarg_start asm (MVMEPROM_REG_NBARGSTART);
	register char *nbarg_end asm (MVMEPROM_REG_NBARGEND);
	extern int edata, end;
	struct mvmeprom_brdid *id, *mvmeprom_getbrdid(void);

	bugargs.dev_lun = dev_lun;
	bugargs.ctrl_lun = ctrl_lun;
	bugargs.flags = flags;
	bugargs.ctrl_addr = ctrl_addr;
	bugargs.entry = entry;
	bugargs.conf_blk = conf_blk;
	bugargs.arg_start = arg_start;
	bugargs.arg_end = arg_end;
	bugargs.nbarg_start = nbarg_start;
	bugargs.nbarg_end = nbarg_end;
	*bugargs.arg_end = 0;

	bzero(&edata, (int)&end-(int)&edata);
	id = mvmeprom_getbrdid();
	bugargs.cputyp = id->model;
	main();
	_rtt();
	/* NOTREACHED */
}

void
__main(void)
{
}


void
bugexec(void (*addr)(void))
{
	register int dev_lun asm (MVMEPROM_REG_DEVLUN);
	register int ctrl_lun asm (MVMEPROM_REG_CTRLLUN);
	register int flags asm (MVMEPROM_REG_FLAGS);
	register int ctrl_addr asm (MVMEPROM_REG_CTRLADDR);
	register int entry asm (MVMEPROM_REG_ENTRY);
	register int conf_blk asm (MVMEPROM_REG_CONFBLK);
	register char *arg_start asm (MVMEPROM_REG_ARGSTART);
	register char *arg_end asm (MVMEPROM_REG_ARGEND);

	dev_lun = bugargs.dev_lun;
	ctrl_lun = bugargs.ctrl_lun;
	flags = bugargs.flags;
	ctrl_addr = bugargs.ctrl_addr;
	entry = bugargs.entry;
	conf_blk = bugargs.conf_blk;
	arg_start = bugargs.arg_start;
	arg_end = bugargs.arg_end;

	(*addr)();
	printf("bugexec: 0x%x returned!\n", addr);

	_rtt();
}