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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: pcb.h,v 1.4 2007/01/13 22:00:56 miod Exp $ */
/*
 * Copyright (c) 1996 Nivas Madhur
 * Mach Operating System
 * Copyright (c) 1993-1992 Carnegie Mellon University
 * All Rights Reserved.
 *
 * 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 AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON AND OMRON DISCLAIM 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 Mellon
 * the rights to redistribute these changes.
 */
/*
 * Motorola 88100 pcb definitions
 *
 */
/*
 */
#ifndef _M88K_PCB_H_
#define _M88K_PCB_H_

#include <machine/frame.h>

/*
 * Our PCB is the regular PCB+Save area for kernel frame.
 * Upon entering kernel mode from user land, save the user context
 * in the saved_state area - this is passed as the exception frame.
 * On a context switch, only registers that need to be saved by the
 * C calling convention and few other regs (pc, psr etc) are saved
 * in the kernel_state part of the PCB. Typically, trap frames are
 * saved on the stack (by low level handlers or by hardware) but,
 * we just decided to do it in the PCB.
 */

struct m88100_pcb {
	unsigned pcb_pc;	/* address to return */
	unsigned :32;
	unsigned pcb_r14;
	unsigned pcb_r15;
	unsigned pcb_r16;
	unsigned pcb_r17;
	unsigned pcb_r18;
	unsigned pcb_r19;
	unsigned pcb_r20;
	unsigned pcb_r21;
	unsigned pcb_r22;
	unsigned pcb_r23;
	unsigned pcb_r24;
	unsigned pcb_r25;
	unsigned pcb_r26;
	unsigned pcb_r27;
	unsigned pcb_r28;
	unsigned pcb_r29;
	unsigned pcb_r30;
	unsigned pcb_sp; 	/* kernel stack pointer */
	/* floating-point state */
	unsigned pcb_fcr62;
	unsigned pcb_fcr63;
};

struct pcb
{
	struct m88100_pcb	kernel_state;
	struct trapframe	user_state;
	int			pcb_onfault;
};

/*
 *	Location of saved user registers for the proc.
 */
#define	USER_REGS(p) \
	(((struct reg *)(&((p)->p_addr->u_pcb.user_state))))

/*
 * The pcb is augmented with machine-dependent additional data for
 * core dumps.  Note that the trapframe here is a copy of the one
 * from the top of the kernel stack (included here so that the kernel
 * stack itself need not be dumped).
 */
struct md_coredump {
	struct	trapframe md_tf;
};

#endif /* _M88K_PCB_H_ */