ArmPlatformPkg/ArmJunoPkg/AcpiTables/Madt.aslc

   1 /** @file
   2 *  Multiple APIC Description Table (MADT)
   3 *
   4 *  Copyright (c) 2012 - 2014, ARM Limited. All rights reserved.
   5 *
   6 *  This program and the accompanying materials
   7 *  are licensed and made available under the terms and conditions of the BSD License
   8 *  which accompanies this distribution.  The full text of the license may be found at
   9 *  http://opensource.org/licenses/bsd-license.php
  10 *
  11 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 *
  14 **/
  15
  16 #include "ArmPlatform.h"
  17 #include <Library/AcpiLib.h>
  18 #include <Library/PcdLib.h>
  19 #include <IndustryStandard/Acpi.h>
  20
  21 #pragma pack (1)
  22
  23 typedef struct {
  24   EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER   Header;
  25   EFI_ACPI_5_0_GIC_STRUCTURE                            GicInterfaces[FixedPcdGet32 (PcdCoreCount)];
  26   EFI_ACPI_5_0_GIC_DISTRIBUTOR_STRUCTURE                GicDistributor;
  27 } EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE;
  28
  29 #pragma pack ()
  30
  31 //
  32 // Multiple APIC Description Table
  33 //
  34 EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE Madt = {
  35   {
  36     ARM_ACPI_HEADER (
  37       EFI_ACPI_1_0_APIC_SIGNATURE,
  38       EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE,
  39       EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_REVISION
  40     ),
  41     //
  42     // MADT specific fields
  43     //
  44     0, // LocalApicAddress
  45     0, // Flags
  46   },
  47   {
  48     // Format: EFI_ACPI_5_0_GIC_STRUCTURE_INIT(GicId, AcpiCpuId, Flags, PmuIrq, GicBase)
  49     // Note: The GIC Structure of the primary CPU must be the first entry (see note in 5.2.12.14 GIC Structure of
  50     //       ACPI v5.0).
  51     //       On Juno we can change the primary CPU changing the SCC register. It is not currently supported in the
  52     //       Trusted Firmware. When supported, we will need to code to dynamically change the ordering.
  53     //       For now we leave CPU2 (A53-0) at the first position.
  54     //       The cores from a same cluster are kept together. It is not an ACPI requirement but in case the OSPM uses
  55     //       the ACPI ARM Parking protocol, it might want to wake up the cores in the order of this table.
  56     EFI_ACPI_5_0_GIC_STRUCTURE_INIT(2, 2, EFI_ACPI_5_0_GIC_ENABLED, 50, FixedPcdGet32 (PcdGicInterruptInterfaceBase)), // A53-0
  57     EFI_ACPI_5_0_GIC_STRUCTURE_INIT(3, 3, EFI_ACPI_5_0_GIC_ENABLED, 54, FixedPcdGet32 (PcdGicInterruptInterfaceBase)), // A53-1
  58     EFI_ACPI_5_0_GIC_STRUCTURE_INIT(4, 4, EFI_ACPI_5_0_GIC_ENABLED, 58, FixedPcdGet32 (PcdGicInterruptInterfaceBase)), // A53-2
  59     EFI_ACPI_5_0_GIC_STRUCTURE_INIT(5, 5, EFI_ACPI_5_0_GIC_ENABLED, 62, FixedPcdGet32 (PcdGicInterruptInterfaceBase)), // A53-3
  60     EFI_ACPI_5_0_GIC_STRUCTURE_INIT(0, 0, EFI_ACPI_5_0_GIC_ENABLED, 34, FixedPcdGet32 (PcdGicInterruptInterfaceBase)), // A57-0
  61     EFI_ACPI_5_0_GIC_STRUCTURE_INIT(1, 1, EFI_ACPI_5_0_GIC_ENABLED, 38, FixedPcdGet32 (PcdGicInterruptInterfaceBase))  // A57-1
  62   },
  63   EFI_ACPI_5_0_GIC_DISTRIBUTOR_INIT(0, FixedPcdGet32 (PcdGicDistributorBase), 0)
  64 };
  65
  66 VOID*
  67 ReferenceAcpiTable (
  68   VOID
  69   )
  70 {
  71   //
  72   // Reference the table being generated to prevent the optimizer from removing the
  73   // data structure from the executable
  74   //
  75   return (VOID*)&Madt;
  76 }