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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: ka750.c,v 1.10 2003/06/02 23:27:59 millert Exp $ */
/*	$NetBSD: ka750.c,v 1.30 1999/08/14 11:30:48 ragge Exp $ */
/*
 * Copyright (c) 1982, 1986, 1988 The Regents of the University of California.
 * Copyright (c) 1994 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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	@(#)ka750.c	7.4 (Berkeley) 5/9/91
 *	@(#)autoconf.c	7.20 (Berkeley) 5/9/91
 */

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

#include <machine/ka750.h>
#include <machine/mtpr.h>
#include <machine/cpu.h>
#include <machine/clock.h>
#include <machine/sid.h>

#include <vax/vax/gencons.h>

void	ctuattach(void);
static	void	ka750_clrf(void);
static	void	ka750_conf(void);
static	void    ka750_memerr(void);
static	int     ka750_mchk(caddr_t);


struct	cpu_dep ka750_calls = {
	0,
	ka750_mchk,
	ka750_memerr,
	ka750_conf,
	generic_clkread,
	generic_clkwrite,
	1,	/* ~VUPS */
	4,	/* SCB pages */
	0,	/* halt call */
	0,	/* Reboot call */
	ka750_clrf,
};

static	caddr_t mcraddr[4];	/* XXX */

void
ka750_conf()
{
	printf("cpu0: KA750, hardware rev %d, ucode rev %d, ",
	    V750HARDW(vax_cpudata), V750UCODE(vax_cpudata));
	if (mfpr(PR_ACCS) & 255) {
		printf("FPA present, enabling.\n");
		mtpr(0x8000, PR_ACCS);
	} else
		printf("no FPA\n");

	if (mfpr(PR_TODR) == 0) { /* Check for failing battery */
		mtpr(1, PR_TODR);
		printf("WARNING: TODR battery broken\n");
	}

	/* Call ctuattach() here so it can setup its vectors. */
	ctuattach();
}

int ka750_memmatch(struct  device  *, struct cfdata	 *, void *);
void ka750_memenable(struct	 device	 *, struct  device  *, void *);

struct	cfattach mem_cmi_ca = {
	sizeof(struct device), ka750_memmatch, ka750_memenable
};

int
ka750_memmatch(parent, cf, aux)
	struct	device	*parent;
	struct cfdata *cf;
	void	*aux;
{
	struct	sbi_attach_args *sa = (struct sbi_attach_args *)aux;

	if (cf->cf_loc[CMICF_TR] != sa->nexnum && cf->cf_loc[CMICF_TR] > -1)
		return 0;

	if (sa->type != NEX_MEM16)
		return 0;

	return 1;
}

struct	mcr750 {
	int	mc_err;			/* error bits */
	int	mc_inh;			/* inhibit crd */
	int	mc_inf;			/* info bits */
};

#define M750_ICRD	0x10000000	/* inhibit crd interrupts, in [1] */
#define M750_UNCORR	0xc0000000	/* uncorrectable error, in [0] */
#define M750_CORERR	0x20000000	/* correctable error, in [0] */

#define M750_INH(mcr)	((mcr)->mc_inh = 0)
#define M750_ENA(mcr)	((mcr)->mc_err = (M750_UNCORR|M750_CORERR), \
			 (mcr)->mc_inh = M750_ICRD)
#define M750_ERR(mcr)	((mcr)->mc_err & (M750_UNCORR|M750_CORERR))

#define M750_SYN(err)	((err) & 0x7f)
#define M750_ADDR(err)	(((err) >> 9) & 0x7fff)

/* enable crd interrupts */
void
ka750_memenable(parent, self, aux)
	struct	device	*parent, *self;
	void	*aux;
{
	struct	sbi_attach_args *sa = (struct sbi_attach_args *)aux;
	struct mcr750 *mcr = (struct mcr750 *)sa->nexaddr;
	int k, l, m, cardinfo;
	
	mcraddr[self->dv_unit] = (caddr_t)sa->nexaddr;

	/* We will use this info for error reporting - later! */
	cardinfo = mcr->mc_inf;
	switch ((cardinfo >> 24) & 3) {
	case 0: printf(": L0011 ");
		break;

	case 1: printf(": L0016 ");
		m = cardinfo & 0xaaaa;
		for (k = l = 0; k < 16; k++){
			if (m & 1)
				l++;
			m >>= 1;
		}
		printf("with %d M8750",l);
		break;

	case 3: printf(": L0022 ");
		m = cardinfo & 0x5555;
		for (k = l = 0; k < 16; k++) {
			if (m & 1)
				l++;
			m>>=1;
		}
		printf("with %d M7199",l);
		m = cardinfo & 0xaaaa;
		if (m) {
			for (k = l = 0; k < 16; k++) {
				if (m & 1)
					l++;
				m >>= 1;
			}
			printf(" and %d M8750",l);
		}
		break;
	}
	printf("\n");


	M750_ENA((struct mcr750 *)mcraddr[0]);
}

/* log crd errors */
void
ka750_memerr()
{
	register struct mcr750 *mcr = (struct mcr750 *)mcraddr[0];
	register int err;

	if (M750_ERR(mcr)) {
		err = mcr->mc_err;	/* careful with i/o space refs */
		printf("mcr0: %s", err & M750_UNCORR ?
		    "hard error" : "soft ecc");
		printf(" addr %x syn %x\n", M750_ADDR(err), M750_SYN(err));
		M750_INH(mcr);
	}
}

char *mc750[]={"0","1","2","3","4","5","6","7","8","9","10","11","12","13",
	"14","15"};

struct mc750frame {
	int	mc5_bcnt;		/* byte count == 0x28 */
	int	mc5_summary;		/* summary parameter (as above) */
	int	mc5_va;			/* virtual address register */
	int	mc5_errpc;		/* error pc */
	int	mc5_mdr;
	int	mc5_svmode;		/* saved mode register */
	int	mc5_rdtimo;		/* read lock timeout */
	int	mc5_tbgpar;		/* tb group parity error register */
	int	mc5_cacherr;		/* cache error register */
	int	mc5_buserr;		/* bus error register */
	int	mc5_mcesr;		/* machine check status register */
	int	mc5_pc;			/* trapped pc */
	int	mc5_psl;		/* trapped psl */
};

#define MC750_TBERR	2		/* type code of cp tbuf par */
#define MC750_TBPAR	4		/* tbuf par bit in mcesr */

int
ka750_mchk(cmcf)
	caddr_t cmcf;
{
	register struct mc750frame *mcf = (struct mc750frame *)cmcf;
	register int type = mcf->mc5_summary;
	int mcsr = mfpr(PR_MCSR);

	printf("machine check %x: %s%s\n", type, mc750[type&0xf],
	    (type&0xf0) ? " abort" : " fault"); 
	printf(
"\tva %x errpc %x mdr %x smr %x rdtimo %x tbgpar %x cacherr %x\n",
	    mcf->mc5_va, mcf->mc5_errpc, mcf->mc5_mdr, mcf->mc5_svmode,
	    mcf->mc5_rdtimo, mcf->mc5_tbgpar, mcf->mc5_cacherr);
	printf("\tbuserr %x mcesr %x pc %x psl %x mcsr %x\n",
	    mcf->mc5_buserr, mcf->mc5_mcesr, mcf->mc5_pc, mcf->mc5_psl,
	    mcsr);
	mtpr(0, PR_TBIA);
	mtpr(0xf, PR_MCESR);
	if (type == MC750_TBERR && (mcf->mc5_mcesr&0xe) == MC750_TBPAR) {
		printf("tbuf par: flushing and returning\n");
		return (MCHK_RECOVERED);
	}
	return (MCHK_PANIC);
}

void
ka750_clrf()
{
	int s = splhigh();

#define WAIT	while ((mfpr(PR_TXCS) & GC_RDY) == 0) ;

	WAIT;

	mtpr(GC_CWFL|GC_CONS, PR_TXDB);

	WAIT;
	mtpr(GC_CCFL|GC_CONS, PR_TXDB);

	WAIT;
	splx(s);
}