/*      $OpenBSD: apecs.c,v 1.24 2025/06/28 16:04:09 miod Exp $ */
/*      $NetBSD: apecs.c,v 1.16 1996/12/05 01:39:34 cgd Exp $   */

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * Copyright (c) 1995, 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.
 */

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

#include <machine/autoconf.h>
#include <machine/rpb.h>

#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/apecsreg.h>
#include <alpha/pci/apecsvar.h>
#ifdef DEC_2100_A50
#include <alpha/pci/pci_2100_a50.h>
#endif
#ifdef DEC_EB64PLUS
#include <alpha/pci/pci_eb64plus.h>
#endif
#ifdef DEC_1000A
#include <alpha/pci/pci_1000a.h>
#endif
#ifdef DEC_1000
#include <alpha/pci/pci_1000.h>
#endif

int     apecsmatch(struct device *, void *, void *);
void    apecsattach(struct device *, struct device *, void *);

const struct cfattach apecs_ca = {
        sizeof(struct device), apecsmatch, apecsattach,
};

struct cfdriver apecs_cd = {
        NULL, "apecs", DV_DULL,
};

int     apecsprint(void *, const char *pnp);

/* There can be only one. */
int apecsfound;
struct apecs_config apecs_configuration;

int
apecsmatch(struct device *parent, void *match, void *aux)
{
        struct mainbus_attach_args *ma = aux;

        /* Make sure that we're looking for an APECS. */
        if (strcmp(ma->ma_name, apecs_cd.cd_name) != 0)
                return (0);

        if (apecsfound)
                return (0);

        return (1);
}

/*
 * Set up the chipset's function pointers.
 */
void
apecs_init(struct apecs_config *acp, int mallocsafe)
{
        acp->ac_comanche_pass2 =
            (REGVAL(COMANCHE_ED) & COMANCHE_ED_PASS2) != 0;
        acp->ac_memwidth =
            (REGVAL(COMANCHE_GCR) & COMANCHE_GCR_WIDEMEM) != 0 ? 128 : 64;
        acp->ac_epic_pass2 =
            (REGVAL(EPIC_DCSR) & EPIC_DCSR_PASS2) != 0;

        acp->ac_haxr1 = REGVAL(EPIC_HAXR1);
        acp->ac_haxr2 = REGVAL(EPIC_HAXR2);

        if (!acp->ac_initted) {
                /* don't do these twice since they set up extents */
                apecs_bus_io_init(&acp->ac_iot, acp);
                apecs_bus_mem_init(&acp->ac_memt, acp);
        }
        acp->ac_mallocsafe = mallocsafe;

        apecs_pci_init(&acp->ac_pc, acp);
        alpha_pci_chipset = &acp->ac_pc;
        alpha_pci_chipset->pc_name = "apecs";
        alpha_pci_chipset->pc_mem = APECS_PCI_SPARSE;
        alpha_pci_chipset->pc_dense = APECS_PCI_DENSE;
        alpha_pci_chipset->pc_ports = APECS_PCI_SIO;
        alpha_pci_chipset->pc_bwx = 0;
        alpha_pci_chipset->pc_hae_mask = EPIC_HAXR1_EADDR;

        acp->ac_initted = 1;
}

void
apecsattach(struct device *parent, struct device *self, void *aux)
{
        struct apecs_config *acp;
        struct pcibus_attach_args pba;

        /* note that we've attached the chipset; can't have 2 APECSes. */
        apecsfound = 1;

        /*
         * set up the chipset's info; done once at console init time
         * (maybe), but doesn't hurt to do twice.
         */
        acp = &apecs_configuration;
        apecs_init(acp, 1);

        apecs_dma_init(acp);

        printf(": DECchip %s Core Logic chipset\n",
            acp->ac_memwidth == 128 ? "21072" : "21071");
        printf("%s: DC21071-CA pass %d, %d-bit memory bus\n",
            self->dv_xname, acp->ac_comanche_pass2 ? 2 : 1, acp->ac_memwidth);
        printf("%s: DC21071-DA pass %d\n", self->dv_xname,
            acp->ac_epic_pass2 ? 2 : 1);
        /* XXX print bcache size */

        if (!acp->ac_epic_pass2)
                printf("WARNING: 21071-DA NOT PASS2... NO BETS...\n");

        switch (cputype) {
#ifdef DEC_2100_A50
        case ST_DEC_2100_A50:
                pci_2100_a50_pickintr(acp);
                break;
#endif

#ifdef DEC_EB64PLUS
        case ST_EB64P:
                pci_eb64plus_pickintr(acp);
                break;
#endif

#ifdef DEC_1000A
        case ST_DEC_1000A:
                pci_1000a_pickintr(acp, &acp->ac_iot, &acp->ac_memt,
                        &acp->ac_pc);
                break;
#endif

#ifdef DEC_1000
        case ST_DEC_1000:
                pci_1000_pickintr(acp, &acp->ac_iot, &acp->ac_memt,
                        &acp->ac_pc);
                break;
#endif

        default:
                panic("apecsattach: shouldn't be here, really...");
        }

        bzero(&pba, sizeof(pba));
        pba.pba_busname = "pci";
        pba.pba_iot = &acp->ac_iot;
        pba.pba_memt = &acp->ac_memt;
        pba.pba_dmat =
            alphabus_dma_get_tag(&acp->ac_dmat_direct, ALPHA_BUS_PCI);
        pba.pba_pc = &acp->ac_pc;
        pba.pba_domain = pci_ndomains++;
        pba.pba_bus = 0;
#ifdef notyet
        pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
            PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
#endif
        config_found(self, &pba, apecsprint);
}

int
apecsprint(void *aux, const char *pnp)
{
        register struct pcibus_attach_args *pba = aux;

        /* only PCIs can attach to APECSes; easy. */
        if (pnp)
                printf("%s at %s", pba->pba_busname, pnp);
        printf(" bus %d", pba->pba_bus);
        return (UNCONF);
}