/*      $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;
}

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