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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: mcbusvar.h,v 1.1 2007/03/16 21:22:27 robert Exp $ */
/* $NetBSD: mcbusvar.h,v 1.6 2005/12/11 12:16:17 christos Exp $ */

/*
 * Copyright (c) 1998 by Matthew Jacob
 * NASA AMES Research Center.
 * 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 immediately at the beginning of the file, without modification,
 *    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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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.
 */

/*
 * Soft definitions for the MCBUS main system
 * bus found on AlphaServer 4100 systems.
 */

/*
 * The structure used to attach devices to the MCbus.
 */
struct mcbus_dev_attach_args {
	char *		ma_name;	/* so things aren't confused */
	u_int8_t	ma_gid;		/* GID of MCBUS (MCBUS #) */
	u_int8_t	ma_mid;		/* Module ID on MCBUS */
	u_int8_t	ma_type;	/* Module "type" */
	u_int8_t	ma_configured;	/* nonzero if configured */
};
#define	MCBUS_GID_FROM_INSTANCE(unit)	(7 - unit)

/*
 * Bus-dependent structure for CPUs. This is dynamically allocated
 * for each CPU on the MCbus, and glued into the cpu_softc as sc_busdep,
 * if there is such a beast available. Otherwise, a single global version
 * is used so that the MCPCIA configuration code can determine toads
 * like module id and bcache size of the master CPU.
 */
struct mcbus_cpu_busdep {
	u_int8_t	mcbus_cpu_mid;	/* MCbus Module ID */
	u_int8_t	mcbus_bcache;	/* BCache on this CPU */
	u_int8_t	mcbus_valid;
};

#define	MCBUS_CPU_BCACHE_0MB	0
#define	MCBUS_CPU_BCACHE_1MB	1
#define	MCBUS_CPU_BCACHE_4MB	2

/*
 * "types"
 */
#define	MCBUS_TYPE_RES	0
#define	MCBUS_TYPE_UNK	1
#define	MCBUS_TYPE_MEM	2
#define	MCBUS_TYPE_CPU	3
#define	MCBUS_TYPE_PCI	4

#ifdef _KERNEL
extern struct mcbus_cpu_busdep mcbus_primary;
extern const int mcbus_mcpcia_probe_order[];
#endif