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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: cfbreg.h,v 1.4 2003/10/18 20:14:41 jmc Exp $	*/
/*	$NetBSD: cfbreg.h,v 1.1 1996/05/01 23:25:00 cgd Exp $	*/

/*
 * Copyright (c) 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

/*
 * Color Frame Buffer definitions, from:
 * ``PMAG-BA TURBOchannel Color Frame Buffer Functional Specification
 * (Revision 1.2)'', available via anonymous FTP from gatekeeper.dec.com.
 *
 * All definitions are in "dense" TurboChannel space.
 */

/*
 * Size of the CFB address space.
 */
#define	CFB_SIZE		0x400000

/*
 * Offsets into slot space of each functional unit.
 */
#define	CFB_FB_OFFSET		0x000000	/* Frame buffer */
#define	CFB_FB_SIZE		0x100000
#define	CFB_RAMDAC_OFFSET	0x200000	/* Bt495 RAMDAC Registers */
#define	CFB_RAMDAC_SIZE		0x100000
#define	CFB_IREQCTRL_OFFSET	0x300000	/* IReq Control region */
#define	CFB_IREQCTRL_SIZE	0x080000

/*
 * Bt459 RAMDAC registers (offsets from CFB_RAMDAC_OFFSET)
 */
#define	CFB_RAMDAC_ADDRLOW	0x0000	/* Address register low byte */
#define	CFB_RAMDAC_ADDRHIGH	0x0004	/* Address register high byte */
#define	CFB_RAMDAC_REGDATA	0x0008	/* Register addressed by addr reg */
#define	CFB_RAMDAC_CMAPDATA	0x000c	/* Colormap loc addressed by addr reg */