/** @file
*  Generic Timer Description Table (GTDT)
*
*  Copyright (c) 2018, Linaro Limited. All rights reserved.
*  Copyright (c) 2012 - 2016, ARM Limited. All rights reserved.
*
*  SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/

#include <Library/AcpiLib.h>
#include <Library/PcdLib.h>
#include <IndustryStandard/Acpi.h>

#include "AcpiTables.h"

#define SYSTEM_TIMER_BASE_ADDRESS   0xFF80001C
#define GTDT_GLOBAL_FLAGS           0
#define GTDT_GTIMER_FLAGS           EFI_ACPI_6_0_GTDT_TIMER_FLAG_TIMER_INTERRUPT_POLARITY

#pragma pack (1)

typedef struct {
  EFI_ACPI_6_0_GENERIC_TIMER_DESCRIPTION_TABLE Gtdt;
} EFI_ACPI_6_0_GENERIC_TIMER_DESCRIPTION_TABLES;

#pragma pack ()

EFI_ACPI_6_0_GENERIC_TIMER_DESCRIPTION_TABLES Gtdt = {
  {
    ACPI_HEADER(
      EFI_ACPI_6_0_GENERIC_TIMER_DESCRIPTION_TABLE_SIGNATURE,
      EFI_ACPI_6_0_GENERIC_TIMER_DESCRIPTION_TABLES,
      EFI_ACPI_6_0_GENERIC_TIMER_DESCRIPTION_TABLE_REVISION
    ),
    SYSTEM_TIMER_BASE_ADDRESS,                    // UINT64  PhysicalAddress
    0,                                            // UINT32  Reserved
    FixedPcdGet32 (PcdArmArchTimerSecIntrNum),    // UINT32  SecurePL1TimerGSIV
    GTDT_GTIMER_FLAGS,                            // UINT32  SecurePL1TimerFlags
    FixedPcdGet32 (PcdArmArchTimerIntrNum),       // UINT32  NonSecurePL1TimerGSIV
    GTDT_GTIMER_FLAGS,                            // UINT32  NonSecurePL1TimerFlags
    FixedPcdGet32 (PcdArmArchTimerVirtIntrNum),   // UINT32  VirtualTimerGSIV
    GTDT_GTIMER_FLAGS,                            // UINT32  VirtualTimerFlags
    FixedPcdGet32 (PcdArmArchTimerHypIntrNum),    // UINT32  NonSecurePL2TimerGSIV
    GTDT_GTIMER_FLAGS,                            // UINT32  NonSecurePL2TimerFlags
    0xFFFFFFFFFFFFFFFF,                           // UINT64  CntReadBasePhysicalAddress
    0,                                            // UINT32  PlatformTimerCount
    0                                             // UINT32 PlatfromTimerOffset
  },
};

//
// Reference the table being generated to prevent the optimizer
// from removing the data structure from the executable
//
VOID* CONST ReferenceAcpiTable = &Gtdt;
