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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: ka53.c,v 1.5 2002/09/21 13:42:43 hugh Exp $	*/
/*	$NetBSD: ka53.c,v 1.2 2000/06/04 02:19:27 matt Exp $	*/
/*
 * Copyright (c) 2002 Hugh Graham.
 * Copyright (c) 2000 Ludd, University of Lule}, Sweden.
 * 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, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *     This product includes software developed at Ludd, University of 
 *     Lule}, Sweden and its contributors.
 * 4. 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 ``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 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.
 */

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/kernel.h>

#include <machine/clock.h>
#include <machine/cpu.h>
#include <machine/scb.h>
#include <machine/sid.h>
#include <machine/mtpr.h>

static void    ka53_conf(void);
static void    ka53_memerr(void);
static int     ka53_mchk(caddr_t);
static void    ka53_softmem(void *);
static void    ka53_hardmem(void *);
static void    ka53_steal_pages(void);
static void    ka53_cache_enable(void);

/* 
 * Declaration of 680-specific calls.
 */
struct cpu_dep ka53_calls = {
	ka53_steal_pages,
	ka53_mchk,
	ka53_memerr, 
	ka53_conf,
	generic_clkread,
	generic_clkwrite,
	32,	 /* ~VUPS */
	2,	/* SCB pages */
	generic_halt,
	generic_reboot,
};

void
ka53_conf()
{
	char *cpuname;

	/* This initialises ISP, avoiding interrupt exceptions  */
	{volatile int *hej = (void *)mfpr(PR_ISP); *hej = *hej; hej[-1] = hej[-1];}

	/* This vector (qbus related?) comes out of nowhere, ignore it for now */
	scb_vecalloc(0x0, (void *)nullop, NULL, SCB_ISTACK, NULL);

	cpmbx = (struct cpmbx *)vax_map_physmem(0x20140400, 1);

	switch((vax_siedata >> 8) & 0xFF) {
	case VAX_STYP_50:
		cpuname = "KA50";
		break;
	case VAX_STYP_51:
		cpuname = "KA51";
		break;
	case VAX_STYP_52:
		cpuname = "KA52";
		break;
	case VAX_STYP_53:
		cpuname = "KA53";
		break;
	default:
		cpuname = "unknown NVAX";
	}
	printf("cpu0: %s, ucode rev %d\n", cpuname, vax_cpudata & 0xff);
}

/*
 * Why may we get memory errors during startup???
 */

void
ka53_hardmem(void *arg)
{
	if (cold == 0)
		printf("Hard memory error\n");
	splhigh();
}

void
ka53_softmem(void *arg)
{
	if (cold == 0)
		printf("Soft memory error\n");
	splhigh();
}


/*
 * KA53-specific IPRs. KA53 has the funny habit to control all caches
 * via IPRs.
 */
#define PR_CCTL	 0xa0
#define CCTL_ENABLE	0x00000001
#define CCTL_SW_ETM	0x40000000
#define CCTL_HW_ETM	0x80000000

#define PR_BCETSTS	0xa3
#define PR_BCEDSTS	0xa6
#define PR_NESTS	0xae

#define PR_VMAR	 0xd0
#define PR_VTAG	 0xd1
#define PR_ICSR	 0xd3
#define ICSR_ENABLE	0x01

#define PR_PCCTL	0xf8
#define PCCTL_P_EN	0x10
#define PCCTL_I_EN	0x02
#define PCCTL_D_EN	0x01

void
ka53_cache_enable()
{
	int start, slut;

	/*
	 * Turn caches off.
	 */
	mtpr(0, PR_ICSR);
	mtpr(0, PR_PCCTL);
	mtpr(mfpr(PR_CCTL) | CCTL_SW_ETM, PR_CCTL);

	/*
	 * Invalidate caches.
	 */
	mtpr(mfpr(PR_CCTL) | 6, PR_CCTL);	/* Set cache size and speed */
	mtpr(mfpr(PR_BCETSTS), PR_BCETSTS);	/* Clear error bits */
	mtpr(mfpr(PR_BCEDSTS), PR_BCEDSTS);	/* Clear error bits */
	mtpr(mfpr(PR_NESTS), PR_NESTS);	 /* Clear error bits */


	start = 0x01400000;
	slut  = 0x01420000;

	/* Flush cache lines */
	for (; start < slut; start += 0x20)
		mtpr(0, start);

	mtpr((mfpr(PR_CCTL) & ~(CCTL_SW_ETM|CCTL_ENABLE)) | CCTL_HW_ETM,
	    PR_CCTL);

	start = 0x01000000;
	slut  = 0x01020000;

	/* clear tag and valid */
	for (; start < slut; start += 0x20)
		mtpr(0, start);

	mtpr(mfpr(PR_CCTL) | 6 | CCTL_ENABLE, PR_CCTL); /* enab. bcache */

	start = 0x01800000;
	slut  = 0x01802000;

	/* Clear primary cache */
	for (; start < slut; start += 0x20)
		mtpr(0, start);

	/* Flush the pipes (via REI) */
	asm("movpsl -(sp); movab 1f,-(sp); rei; 1:;");

	/* Enable primary cache */
	mtpr(PCCTL_P_EN|PCCTL_I_EN|PCCTL_D_EN, PR_PCCTL);

	/* Enable the VIC */
	start = 0;
	slut  = 0x800;
	for (; start < slut; start += 0x20) {
		mtpr(start, PR_VMAR);
		mtpr(0, PR_VTAG);
	}
	mtpr(ICSR_ENABLE, PR_ICSR);
}

void
ka53_memerr()
{
	printf("Memory err!\n");
}

int
ka53_mchk(caddr_t addr)
{
	mtpr(0x00, PR_MCESR);
	printf("Machine Check\n");
	return 0;
}

void
ka53_steal_pages()
{

	/*
	 * Get the soft and hard memory error vectors now.
	 */

	scb_vecalloc(0x54, ka53_softmem, NULL, 0, NULL);
	scb_vecalloc(0x60, ka53_hardmem, NULL, 0, NULL);


	/* Turn on caches (to speed up execution a bit) */
	ka53_cache_enable();
}