/*      $NetBSD: mainbus.c,v 1.14 2022/12/12 01:07:52 gutteridge Exp $  */

/*-
 * Copyright (c) 2006 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Author:
 *
 * 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.14 2022/12/12 01:07:52 gutteridge Exp $");

#include "acpica.h"

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

#include <dev/acpi/acpica.h>
#include <dev/acpi/acpivar.h>
#include <actables.h>


static int mainbus_match(device_t, cfdata_t, void *);
static void mainbus_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(mainbus, 0, mainbus_match, mainbus_attach, NULL, NULL);


/*
 * Probe for the mainbus; always succeeds.
 */
static int
mainbus_match(device_t parent, cfdata_t match, void *aux)
{

        return 1;
}

/*
 * Attach the mainbus.
 */
static void
mainbus_attach(device_t parent, device_t self, void *aux)
{
#if NACPICA > 0
        struct acpibus_attach_args aaa;
#endif
        ACPI_PHYSICAL_ADDRESS rsdp_ptr;
        ACPI_MADT_LOCAL_SAPIC *entry;
        ACPI_TABLE_MADT *table;
        ACPI_TABLE_RSDP *rsdp;
        ACPI_TABLE_XSDT *xsdt;
        char *end, *p;
        int tables, i;

        aprint_naive("\n");
        aprint_normal("\n");

        if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
                panic("cpu not found");

        rsdp = (ACPI_TABLE_RSDP *)IA64_PHYS_TO_RR7(rsdp_ptr);
        xsdt = (ACPI_TABLE_XSDT *)IA64_PHYS_TO_RR7(rsdp->XsdtPhysicalAddress);

        tables = (UINT64 *)((char *)xsdt + xsdt->Header.Length) -
            xsdt->TableOffsetEntry;

        for (i = 0; i < tables; i++) {
                int len;
                char *sig;

                table = (ACPI_TABLE_MADT *)
                    IA64_PHYS_TO_RR7(xsdt->TableOffsetEntry[i]);

                sig = table->Header.Signature;
                if (strncmp(sig, ACPI_SIG_MADT, ACPI_NAMESEG_SIZE) != 0)
                        continue;
                len = table->Header.Length;
                if (ACPI_FAILURE(AcpiUtChecksum((void *)table, len)))
                        continue;

                end = (char *)table + table->Header.Length;
                p = (char *)(table + 1);
                while (p < end) {
                        entry = (ACPI_MADT_LOCAL_SAPIC *)p;

                        if (entry->Header.Type == ACPI_MADT_TYPE_LOCAL_SAPIC)
                                config_found(self, entry, NULL,
                                    CFARGS(.iattr = "cpubus"));

                        p += entry->Header.Length;
                }
        }

#if NACPICA > 0
        acpi_probe();

        aaa.aa_iot = IA64_BUS_SPACE_IO;
        aaa.aa_memt = IA64_BUS_SPACE_MEM;
        aaa.aa_pc = 0;
        aaa.aa_pciflags =
            PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY |
            PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY |
            PCI_FLAGS_MWI_OKAY;
        aaa.aa_ic = 0;
        aaa.aa_dmat = NULL;     /* XXX */
        aaa.aa_dmat64 = NULL;   /* XXX */
        config_found(self, &aaa, NULL,
            CFARGS(.iattr = "acpibus"));
#endif

        return;
}