/*      $NetBSD: madt.c,v 1.6 2023/07/13 18:43:34 mrg Exp $     */
/*-
 * Copyright (c) 2001 Doug Rabson
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD: src/sys/ia64/acpica/madt.c,v 1.20 2007/03/22 18:16:42 jkim Exp $
 */

#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/mutex.h>

#include <machine/md_var.h>
#include <machine/sapicvar.h>

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


extern uint64_t ia64_lapic_address;

static void
print_entry(ACPI_SUBTABLE_HEADER *entry)
{

        switch (entry->Type) {
        case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: {
                ACPI_MADT_INTERRUPT_OVERRIDE *iso =
                    (ACPI_MADT_INTERRUPT_OVERRIDE *)entry;
                printf("\tInterrupt source override entry\n");
                printf("\t\tBus=%u, Source=%u, Irq=0x%x\n", iso->Bus,
                    iso->SourceIrq, iso->GlobalIrq);
                break;
        }

        case ACPI_MADT_TYPE_IO_APIC:
                printf("\tI/O APIC entry\n");
                break;

        case ACPI_MADT_TYPE_IO_SAPIC: {
                ACPI_MADT_IO_SAPIC *sapic = (ACPI_MADT_IO_SAPIC *)entry;
                printf("\tI/O SAPIC entry\n");
                printf("\t\tId=0x%x, InterruptBase=0x%x, Address=0x%lx\n",
                    sapic->Id, sapic->GlobalIrqBase, sapic->Address);
                break;
        }

        case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
                printf("\tLocal APIC NMI entry\n");
                break;

        case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: {
                ACPI_MADT_LOCAL_APIC_OVERRIDE *lapic =
                    (ACPI_MADT_LOCAL_APIC_OVERRIDE *)entry;
                printf("\tLocal APIC override entry\n");
                printf("\t\tLocal APIC address=0x%jx\n", lapic->Address);
                break;
        }

        case ACPI_MADT_TYPE_LOCAL_SAPIC: {
                ACPI_MADT_LOCAL_SAPIC *sapic = (ACPI_MADT_LOCAL_SAPIC *)entry;
                printf("\tLocal SAPIC entry\n");
                printf("\t\tProcessorId=0x%x, Id=0x%x, Eid=0x%x",
                    sapic->ProcessorId, sapic->Id, sapic->Eid);
                if (!(sapic->LapicFlags & ACPI_MADT_ENABLED))
                        printf(" (disabled)");
                printf("\n");
                break;
        }

        case ACPI_MADT_TYPE_NMI_SOURCE:
                printf("\tNMI entry\n");
                break;

        case ACPI_MADT_TYPE_INTERRUPT_SOURCE: {
                ACPI_MADT_INTERRUPT_SOURCE *pis =
                    (ACPI_MADT_INTERRUPT_SOURCE *)entry;
                printf("\tPlatform interrupt entry\n");
                printf("\t\tPolarity=%u, TriggerMode=%u, Id=0x%x, "
                    "Eid=0x%x, Vector=0x%x, Irq=%d\n",
                    pis->IntiFlags & ACPI_MADT_POLARITY_MASK,
                    (pis->IntiFlags & ACPI_MADT_TRIGGER_MASK) >> 2,
                    pis->Id, pis->Eid, pis->IoSapicVector, pis->GlobalIrq);
                break;
        }

        case ACPI_MADT_TYPE_LOCAL_APIC:
                printf("\tLocal APIC entry\n");
                break;

        default:
                printf("\tUnknown type %d entry\n", entry->Type);
                break;
        }
}

void
ia64_probe_sapics(void)
{
        ACPI_PHYSICAL_ADDRESS rsdp_ptr;
        ACPI_SUBTABLE_HEADER *entry;
        ACPI_TABLE_MADT *table;
        ACPI_TABLE_RSDP *rsdp;
        ACPI_TABLE_XSDT *xsdt;
        char *end, *p;
        int t, tables;
        extern int has_i8259;

        if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
                return;

        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 (t = 0; t < tables; t++) {
                table = (ACPI_TABLE_MADT *)
                    IA64_PHYS_TO_RR7(xsdt->TableOffsetEntry[t]);

                if (bootverbose)
                        printf("Table '%c%c%c%c' at %p\n",
                            table->Header.Signature[0],
                            table->Header.Signature[1],
                            table->Header.Signature[2],
                            table->Header.Signature[3], table);

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

                /* Save the address of the processor interrupt block. */
                if (bootverbose)
                        printf("\tLocal APIC address=0x%x\n", table->Address);
                ia64_lapic_address = table->Address;

                if (table->Flags & ACPI_MADT_PCAT_COMPAT)
                        has_i8259 = 1;

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

                        if (bootverbose)
                                print_entry(entry);

                        switch (entry->Type) {
                        case ACPI_MADT_TYPE_IO_SAPIC:
                        {
                                ACPI_MADT_IO_SAPIC *sapic =
                                    (ACPI_MADT_IO_SAPIC *)entry;

                                sapic_create(sapic->Id, sapic->GlobalIrqBase,
                                    sapic->Address);
                                break;
                        }

                        case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
                        {
                                ACPI_MADT_LOCAL_APIC_OVERRIDE *lapic =
                                    (ACPI_MADT_LOCAL_APIC_OVERRIDE *)entry;

                                ia64_lapic_address = lapic->Address;
                                break;
                        }

#ifdef MULTIPROCESSOR
                        case ACPI_MADT_TYPE_LOCAL_SAPIC:
                        {
                                ACPI_MADT_LOCAL_SAPIC *sapic =
                                    (ACPI_MADT_LOCAL_SAPIC *)entry;

                                if (sapic->LapicFlags & ACPI_MADT_ENABLED)
                                        cpu_mp_add(sapic->ProcessorId,
                                            sapic->Id, sapic->Eid);
                                break;
                        }
#endif

                        default:
                                break;
                        }

                        p += entry->Length;
                }
        }
}

/*
 * Count the number of local SAPIC entries in the APIC table. Every enabled
 * entry corresponds to a processor.
 */
int
ia64_count_cpus(void)
{
        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 cpus, t, tables;

        if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
                return 0;

        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;

        cpus = 0;

        for (t = 0; t < tables; t++) {
                table = (ACPI_TABLE_MADT *)
                    IA64_PHYS_TO_RR7(xsdt->TableOffsetEntry[t]);

                if (strncmp(table->Header.Signature, ACPI_SIG_MADT,
                    ACPI_NAMESEG_SIZE) != 0 ||
                    ACPI_FAILURE(AcpiUtChecksum((void *)table,
                        table->Header.Length)))
                        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 &&
                            (entry->LapicFlags & ACPI_MADT_ENABLED))
                                cpus++;

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

        return cpus;
}