/** @file
  Legacy Region Support

  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>

  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _LEGACY_INTERRUPT_H_
#define _LEGACY_INTERRUPT_H_

#include <PiDxe.h>

#include <Protocol/LegacyInterrupt.h>

#include <Library/PcdLib.h>
#include <Library/PciLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <OvmfPlatforms.h>


#define LEGACY_INT_BUS  0
#define LEGACY_INT_DEV_PIIX4  0x01
#define LEGACY_INT_DEV_Q35    0x1f
#define LEGACY_INT_FUNC 0

#define PIRQN           0x00  // PIRQ Null
#define PIRQA           0x60
#define PIRQB           0x61
#define PIRQC           0x62
#define PIRQD           0x63
#define PIRQE           0x68
#define PIRQF           0x69
#define PIRQG           0x6A
#define PIRQH           0x6B

#define MAX_PIRQ_NUMBER 8

/**
  Return the number of PIRQs supported by this chipset.

  @param[in]  This         Pointer to LegacyInterrupt Protocol
  @param[out] NumberPirqs  The pointer to return the max IRQ number supported

  @retval EFI_SUCCESS   Max PIRQs successfully returned

**/
EFI_STATUS
EFIAPI
GetNumberPirqs (
  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
  OUT UINT8                          *NumberPirqs
  );

/**
  Return PCI location of this device.
  $PIR table requires this info.

  @param[in]   This                - Protocol instance pointer.
  @param[out]  Bus                 - PCI Bus
  @param[out]  Device              - PCI Device
  @param[out]  Function            - PCI Function

  @retval  EFI_SUCCESS   Bus/Device/Function returned

**/
EFI_STATUS
EFIAPI
GetLocation (
  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
  OUT UINT8                          *Bus,
  OUT UINT8                          *Device,
  OUT UINT8                          *Function
  );

/**
  Read the given PIRQ register

  @param[in]  This        Protocol instance pointer
  @param[in]  PirqNumber  The Pirq register 0 = A, 1 = B etc
  @param[out] PirqData    Value read

  @retval EFI_SUCCESS   Decoding change affected.
  @retval EFI_INVALID_PARAMETER   Invalid PIRQ number

**/
EFI_STATUS
EFIAPI
ReadPirq (
  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
  IN  UINT8                          PirqNumber,
  OUT UINT8                          *PirqData
  );

/**
  Write the given PIRQ register

  @param[in]  This        Protocol instance pointer
  @param[in]  PirqNumber  The Pirq register 0 = A, 1 = B etc
  @param[out] PirqData    Value to write

  @retval EFI_SUCCESS   Decoding change affected.
  @retval EFI_INVALID_PARAMETER   Invalid PIRQ number

**/
EFI_STATUS
EFIAPI
WritePirq (
  IN  EFI_LEGACY_INTERRUPT_PROTOCOL  *This,
  IN  UINT8                          PirqNumber,
  IN  UINT8                          PirqData
  );

#endif

