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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: db_machdep.h,v 1.11 2005/11/06 22:21:30 miod Exp $	*/
/*	$NetBSD: db_machdep.h,v 1.6 1998/08/10 14:33:33 ragge Exp $	*/

/* 
 * Mach Operating System
 * Copyright (c) 1991,1990 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 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 Mellon
 * the rights to redistribute these changes.
 */

#ifndef	_VAX_DB_MACHDEP_H_
#define	_VAX_DB_MACHDEP_H_

/*
 * Machine-dependent defines for new kernel debugger.
 * Modified for vax out of i386 code.
 */

#include <sys/param.h>
#include <uvm/uvm_extern.h>
#include <machine/trap.h>
#include <machine/psl.h>

typedef	vaddr_t	db_addr_t;		/* address - unsigned */
typedef	long		db_expr_t;	/* expression - signed */

typedef struct trapframe db_regs_t;
db_regs_t	ddb_regs;	/* register state */
#define	DDB_REGS	(&ddb_regs)

#define	PC_REGS(regs)	((db_addr_t)(regs)->pc)
#define	SET_PC_REGS(regs, value)	(regs)->pc = (long)(value)

#define	BKPT_INST	0x03		/* breakpoint instruction */
#define	BKPT_SIZE	(1)		/* size of breakpoint inst */
#define	BKPT_SET(inst)	(BKPT_INST)

#define	FIXUP_PC_AFTER_BREAK(regs)	((regs)->pc -= BKPT_SIZE)

#define	db_clear_single_step(regs)	((regs)->psl &= ~PSL_T)
#define	db_set_single_step(regs)	((regs)->psl |=  PSL_T)

#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BPTFLT)
#define IS_WATCHPOINT_TRAP(type, code)	((type) == T_TRCTRAP)

#define	I_CALL		0xfb
#define	I_RET		0x04
#define	I_IRET		0x02

#define	inst_trap_return(ins)	(((ins)&0xff) == I_IRET)
#define	inst_return(ins)	(((ins)&0xff) == I_RET)
#define	inst_call(ins)		(((ins)&0xff) == I_CALL)

#define inst_load(ins)		0
#define inst_store(ins)		0

/* Prototypes */
void	kdb_trap(struct trapframe *);

/*
 * We use a.out symbols in DDB.
 */
#define	DB_AOUT_SYMBOLS

#endif	/* _VAX_DB_MACHDEP_H_ */