text: /** @file
  
  Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent
  
  **/
  
  #ifndef PCI_PLATFORM_H_
  #define PCI_PLATFORM_H_
  
  #include <PiDxe.h>
  #include <Register/PchRegsSata.h>
  #include <Register/PchRegsEva.h>
  #include <PchAccess.h>
  #include <Platform.h>
  #include <Library/BaseLib.h>
  #include <Library/BaseMemoryLib.h>
  #include <Library/DebugLib.h>
  #include <Library/S3PciLib.h>
  #include <Library/PciLib.h>
  #include <Library/UefiRuntimeServicesTableLib.h>
  #include <Library/MemoryAllocationLib.h>
  #include <Library/UefiBootServicesTableLib.h>
  #include <Library/HobLib.h>
  #include <Library/PcdLib.h>
  #include <Protocol/Runtime.h>
  #include <Protocol/CpuIo2.h>
  #include <Protocol/PciCallback.h>
  #include <Protocol/PciPlatform.h>
  #include <Protocol/PciIovPlatform.h>
  #include <Protocol/PciIo.h>
  #include <Protocol/FirmwareVolume2.h>
  #include <Guid/SetupVariable.h>
  #include <Guid/SocketVariable.h>
  #include <IndustryStandard/Pci.h>
  
  //
  // Global variables for Option ROMs
  //
  
  #define INVALID                     0xBD
  
  #define PCI_CALLBACK_DATA_SIGNATURE SIGNATURE_32 ('P', 'c', 'i', 'c')
  
  typedef struct {
    UINT32                    Signature;
    LIST_ENTRY                Link;
    EFI_PCI_CALLBACK_FUNC     Function;
    EFI_PCI_ENUMERATION_PHASE Phase;
  } PCI_CALLBACK_DATA;
  
  typedef struct {
    EFI_HANDLE                      PciPlatformHandle;
    EFI_HANDLE                      RootBridgeHandle;
    EFI_PCI_PLATFORM_PROTOCOL       PciPlatform;
    EFI_PCI_CALLBACK_PROTOCOL       PciCallback;
  #ifdef EFI_PCI_IOV_SUPPORT
    EFI_PCI_IOV_PLATFORM_PROTOCOL   PciIovPlatform;
  #endif
    EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
    EFI_CPU_IO2_PROTOCOL            *CpuIo;
    EFI_LIST_ENTRY                  PciCallbackList;
    EFI_PCI_CALLBACK_CONTEXT        Context;
    EFI_PCI_ENUMERATION_PHASE       PciEnumerationPhase;
    UINT8                           BusAssignedTime;
  } PCI_PLATFORM_PRIVATE_DATA;
  
  #define PCI_CALLBACK_DATA_FROM_LINK(_node) \
    CR ( \
      _node, \
      PCI_CALLBACK_DATA, \
      Link, \
      PCI_CALLBACK_DATA_SIGNATURE \
      )
  
  extern PCI_PLATFORM_PRIVATE_DATA  mPciPrivateData;
  extern EFI_GUID  gPchSataEfiLoadProtocolGuid;
  
  /**
  
    Perform initialization by the phase indicated.
  
    @param This          -  Pointer to the EFI_PCI_PLATFORM_PROTOCOL instance.
    @param HostBridge    -  The associated PCI host bridge handle.
    @param Phase         -  The phase of the PCI controller enumeration.
    @param ChipsetPhase  -  Defines the execution phase of the PCI chipset driver.
  
    @retval EFI_SUCCESS  -  Must return with success.
  
  **/
  EFI_STATUS
  EFIAPI
  PhaseNotify (
    IN EFI_PCI_PLATFORM_PROTOCOL                        *This,
    IN EFI_HANDLE                                       HostBridge,
    IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PHASE    Phase,
    IN EFI_PCI_CHIPSET_EXECUTION_PHASE                  ChipsetPhase
    )
  ;
  
  /**
  
    The PlatformPrepController() function can be used to notify the platform driver so that
    it can perform platform-specific actions. No specific actions are required.
    Several notification points are defined at this time. More synchronization points may be
    added as required in the future. The PCI bus driver calls the platform driver twice for
    every PCI controller-once before the PCI Host Bridge Resource Allocation Protocol driver
    is notified, and once after the PCI Host Bridge Resource Allocation Protocol driver has
    been notified.
    This member function may not perform any error checking on the input parameters. It also
    does not return any error codes. If this member function detects any error condition, it
    needs to handle those errors on its own because there is no way to surface any errors to
    the caller.
  
    @param This          -  Pointer to the EFI_PCI_PLATFORM_PROTOCOL instance.
    @param HostBridge    -  The associated PCI host bridge handle.
    @param RootBridge    -  The associated PCI root bridge handle.
    @param PciAddress    -  The address of the PCI device on the PCI bus.
    @param Phase         -  The phase of the PCI controller enumeration.
    @param ChipsetPhase  -  Defines the execution phase of the PCI chipset driver.
  
    @retval EFI_SUCCESS  -  The function completed successfully.
  
  **/
  EFI_STATUS
  EFIAPI
  PlatformPrepController (
    IN  EFI_PCI_PLATFORM_PROTOCOL                      *This,
    IN  EFI_HANDLE                                     HostBridge,
    IN  EFI_HANDLE                                     RootBridge,
    IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS    PciAddress,
    IN  EFI_PCI_CONTROLLER_RESOURCE_ALLOCATION_PHASE   Phase,
    IN  EFI_PCI_CHIPSET_EXECUTION_PHASE                ChipsetPhase
    )
  ;
  
  /**
  
    Set the PciPolicy as EFI_RESERVE_ISA_IO_NO_ALIAS | EFI_RESERVE_VGA_IO_NO_ALIAS.
  
    @param This       -  The pointer to the Protocol itself.
    PciPolicy  -  the returned Policy.
  
    @retval EFI_UNSUPPORTED        -  Function not supported.
    @retval EFI_INVALID_PARAMETER  -  Invalid PciPolicy value.
  
  **/
  EFI_STATUS
  EFIAPI
  GetPlatformPolicy (
    IN  CONST EFI_PCI_PLATFORM_PROTOCOL            *This,
    OUT EFI_PCI_PLATFORM_POLICY              *PciPolicy
    )
  ;
  
  /**
  
    Return a PCI ROM image for the onboard device represented by PciHandle.
  
    @param This       -  Protocol instance pointer.
    PciHandle  -  PCI device to return the ROM image for.
    RomImage   -  PCI Rom Image for onboard device.
    RomSize    -  Size of RomImage in bytes.
  
    @retval EFI_SUCCESS    -  RomImage is valid.
    @retval EFI_NOT_FOUND  -  No RomImage.
  
  **/
  EFI_STATUS
  EFIAPI
  GetPciRom (
    IN   CONST EFI_PCI_PLATFORM_PROTOCOL      *This,
    IN   EFI_HANDLE                           PciHandle,
    OUT  VOID                                 **RomImage,
    OUT  UINTN                                *RomSize
    )
  ;
  
  /**
  
    Register a callback during PCI bus enumeration
  
    @param This       -  Protocol instance pointer.
    @param Function   -  Callback function pointer.
    @param Phase      -  PCI enumeration phase.
  
    @retval EFI_SUCCESS           - Function has registed successfully
    @retval EFI_UNSUPPORTED       - The function has been regisered
    @retval EFI_InVALID_PARAMETER - The parameter is incorrect
  
  **/
  EFI_STATUS
  EFIAPI
  RegisterPciCallback (
    IN  EFI_PCI_CALLBACK_PROTOCOL               *This,
    IN  EFI_PCI_CALLBACK_FUNC                   Function,
    IN  EFI_PCI_ENUMERATION_PHASE               Phase
    )
  ;
  
  #endif
  