QuarkPlatformPkg/Pci/Dxe/PciHostBridge/PciRootBridge.h - third_party/edk2 - Git at Google

 /** @file
 The PCI Root Bridge header file.

 Copyright (c) 2013-2015 Intel Corporation.

 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
 http://opensource.org/licenses/bsd-license.php

 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.


 **/

 #ifndef _PCI_ROOT_BRIDGE_H_
 #define _PCI_ROOT_BRIDGE_H_

 #include <PiDxe.h>
 #include <IndustryStandard/Acpi.h>
 #include <IndustryStandard/Pci.h>
 #include <PciHostResource.h>

 //
 // Driver Consumed Protocol Prototypes
 //
 #include <Protocol/Metronome.h>
 #include <Protocol/CpuIo2.h>
 #include <Protocol/DevicePath.h>
 #include <Protocol/Runtime.h>
 #include <Protocol/PciRootBridgeIo.h>
 #include <Library/UefiLib.h>
 #include <Library/DebugLib.h>
 #include <Library/DevicePathLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/DxeServicesTableLib.h>
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/BaseLib.h>


 //
 // Define the region of memory used for DMA memory
 //
 #define DMA_MEMORY_TOP          0x0000000001FFFFFFULL

 //
 // The number of PCI root bridges
 //
 #define ROOT_BRIDGE_COUNT  1

 //
 // The default latency for controllers
 //
 #define DEFAULT_PCI_LATENCY 0x20

 //
 // Define resource status constant
 //
 typedef struct {
   EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation;
   UINTN                                     NumberOfBytes;
   UINTN                                     NumberOfPages;
   EFI_PHYSICAL_ADDRESS                      HostAddress;
   EFI_PHYSICAL_ADDRESS                      MappedHostAddress;
 } MAP_INFO;

 typedef struct {
   ACPI_HID_DEVICE_PATH      AcpiDevicePath;
   EFI_DEVICE_PATH_PROTOCOL  EndDevicePath;
 } EFI_PCI_ROOT_BRIDGE_DEVICE_PATH;

 #define PCI_ROOT_BRIDGE_SIGNATURE SIGNATURE_32 ('e', '2', 'p', 'b')

 typedef struct {
   UINT32                            Signature;
   EFI_LIST_ENTRY                    Link;
   EFI_HANDLE                        Handle;
   UINT64                            RootBridgeAllocAttrib;
   UINT64                            Attributes;
   UINT64                            Supports;
   PCI_RES_NODE                      ResAllocNode[6];
   PCI_ROOT_BRIDGE_RESOURCE_APERTURE Aperture;
   EFI_LOCK                          PciLock;
   UINTN                             PciAddress;
   UINTN                             PciData;
   UINT32                            HecBase;
   UINT32                            HecLen;
   UINTN                             BusScanCount;
   BOOLEAN                           BusNumberAssigned;
   VOID                              *ConfigBuffer;
   EFI_DEVICE_PATH_PROTOCOL          *DevicePath;
   EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL   Io;
 } PCI_ROOT_BRIDGE_INSTANCE;

 //
 // Driver Instance Data Macros
 //
 #define DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(a) CR (a, PCI_ROOT_BRIDGE_INSTANCE, Io, PCI_ROOT_BRIDGE_SIGNATURE)

 #define DRIVER_INSTANCE_FROM_LIST_ENTRY(a)              CR (a, PCI_ROOT_BRIDGE_INSTANCE, Link, PCI_ROOT_BRIDGE_SIGNATURE)

 EFI_STATUS
 SimpleIioRootBridgeConstructor (
   IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL    *Protocol,
   IN EFI_HANDLE                         HostBridgeHandle,
   IN PCI_ROOT_BRIDGE_RESOURCE_APERTURE  *ResAppeture,
   IN UINT64                             AllocAttributes
   )
 /*++

 Routine Description:

   Construct the Pci Root Bridge Io protocol.

 Arguments:

   Protocol          -  Protocol to initialize.
   HostBridgeHandle  -  Handle to the HostBridge.
   ResAppeture       -  Resource apperture of the root bridge.
   AllocAttributes   -  Attribute of resouce allocated.

 Returns:

   EFI_SUCCESS  -  Success.
   Others       -  Fail.

 --*/
 ;

 //
 // Protocol Member Function Prototypes
 //
 EFI_STATUS
 EFIAPI
 RootBridgeIoPollMem (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN  UINT64                                 Address,
   IN  UINT64                                 Mask,
   IN  UINT64                                 Value,
   IN  UINT64                                 Delay,
   OUT UINT64                                 *Result
   )
 /*++

 Routine Description:

   Poll an address in memory mapped space until an exit condition is met
   or a timeout occurs.

 Arguments:

   This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Width    -  Width of the memory operation.
   Address  -  The base address of the memory operation.
   Mask     -  Mask used for polling criteria.
   Value    -  Comparison value used for polling exit criteria.
   Delay    -  Number of 100ns units to poll.
   Result   -  Pointer to the last value read from memory location.

 Returns:

   EFI_SUCCESS            -  Success.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.
   EFI_TIMEOUT            -  Delay expired before a match occurred.
   EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoPollIo (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN  UINT64                                 Address,
   IN  UINT64                                 Mask,
   IN  UINT64                                 Value,
   IN  UINT64                                 Delay,
   OUT UINT64                                 *Result
   )
 /*++

 Routine Description:

   Poll an address in I/O space until an exit condition is met
   or a timeout occurs.

 Arguments:

   This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Width    -  Width of I/O operation.
   Address  -  The base address of the I/O operation.
   Mask     -  Mask used for polling criteria.
   Value    -  Comparison value used for polling exit criteria.
   Delay    -  Number of 100ns units to poll.
   Result   -  Pointer to the last value read from memory location.

 Returns:

   EFI_SUCCESS            -  Success.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.
   EFI_TIMEOUT            -  Delay expired before a match occurred.
   EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoMemRead (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN     UINT64                                 Address,
   IN     UINTN                                  Count,
   IN OUT VOID                                   *Buffer
   )
 /*++

 Routine Description:

   Allow read from memory mapped I/O space.

 Arguments:

   This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Width    -  The width of memory operation.
   Address  -  Base address of the memory operation.
   Count    -  Number of memory opeartion to perform.
   Buffer   -  The destination buffer to store data.

 Returns:

   EFI_SUCCESS            -  Success.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.
   EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoMemWrite (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN     UINT64                                 Address,
   IN     UINTN                                  Count,
   IN OUT VOID                                   *Buffer
   )
 /*++

 Routine Description:

   Allow write to memory mapped I/O space.

 Arguments:

   This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Width    -  The width of memory operation.
   Address  -  Base address of the memory operation.
   Count    -  Number of memory opeartion to perform.
   Buffer   -  The source buffer to write data from.

 Returns:

   EFI_SUCCESS            -  Success.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.
   EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoIoRead (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN     UINT64                                 UserAddress,
   IN     UINTN                                  Count,
   IN OUT VOID                                   *UserBuffer
   )
 /*++

 Routine Description:

   Enable a PCI driver to read PCI controller registers in the
   PCI root bridge I/O space.

 Arguments:

   This         -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
   Width        -  Signifies the width of the memory operation.
   UserAddress  -  The base address of the I/O operation.
   Count        -  The number of I/O operations to perform.
   UserBuffer   -  The destination buffer to store the results.

 Returns:

   EFI_SUCCESS            -  The data was read from the PCI root bridge.
   EFI_INVALID_PARAMETER  -  Invalid parameters found.
   EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
                             resources.
 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoIoWrite (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN     UINT64                                 UserAddress,
   IN     UINTN                                  Count,
   IN OUT VOID                                   *UserBuffer
   )
 /*++

 Routine Description:

   Enable a PCI driver to write to PCI controller registers in the
   PCI root bridge I/O space.

 Arguments:

   This         -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
   Width        -  Signifies the width of the memory operation.
   UserAddress  -  The base address of the I/O operation.
   Count        -  The number of I/O operations to perform.
   UserBuffer   -  The source buffer to write data from.

 Returns:

   EFI_SUCCESS            -  The data was written to the PCI root bridge.
   EFI_INVALID_PARAMETER  -  Invalid parameters found.
   EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
                             resources.
 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoCopyMem (
   IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL          *This,
   IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH    Width,
   IN UINT64                                   DestAddress,
   IN UINT64                                   SrcAddress,
   IN UINTN                                    Count
   )
 /*++

 Routine Description:

   Copy one region of PCI root bridge memory space to be copied to
   another region of PCI root bridge memory space.

 Arguments:

   This         -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Width        -  Signifies the width of the memory operation.
   DestAddress  -  Destination address of the memory operation.
   SrcAddress   -  Source address of the memory operation.
   Count        -  Number of memory operations to perform.

 Returns:

   EFI_SUCCESS            -  The data was copied successfully.
   EFI_INVALID_PARAMETER  -  Invalid parameters found.
   EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
                             resources.
 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoPciRead (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN     UINT64                                 Address,
   IN     UINTN                                  Count,
   IN OUT VOID                                   *Buffer
   )
 /*++

 Routine Description:

   Allows read from PCI configuration space.

 Arguments:

   This     -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
   Width    -  Signifies the width of the memory operation.
   Address  -  The address within the PCI configuration space
               for the PCI controller.
   Count    -  The number of PCI configuration operations
               to perform.
   Buffer   -  The destination buffer to store the results.

 Returns:

   EFI_SUCCESS            -  The data was read from the PCI root bridge.
   EFI_INVALID_PARAMETER  -  Invalid parameters found.
   EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
                             resources.
 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoPciWrite (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
   IN     UINT64                                 Address,
   IN     UINTN                                  Count,
   IN OUT VOID                                   *Buffer
   )
 /*++

 Routine Description:

   Allows write to PCI configuration space.

 Arguments:

   This     -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
   Width    -  Signifies the width of the memory operation.
   Address  -  The address within the PCI configuration space
               for the PCI controller.
   Count    -  The number of PCI configuration operations
               to perform.
   Buffer   -  The source buffer to get the results.

 Returns:

   EFI_SUCCESS            -  The data was written to the PCI root bridge.
   EFI_INVALID_PARAMETER  -  Invalid parameters found.
   EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
                             resources.
 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoMap (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL            *This,
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION  Operation,
   IN     VOID                                       *HostAddress,
   IN OUT UINTN                                      *NumberOfBytes,
   OUT    EFI_PHYSICAL_ADDRESS                       *DeviceAddress,
   OUT    VOID                                       **Mapping
   )
 /*++

 Routine Description:

   Provides the PCI controller-specific address needed to access
   system memory for DMA.

 Arguments:

   This           -  A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
   Operation      -  Indicate if the bus master is going to read or write
                     to system memory.
   HostAddress    -  The system memory address to map on the PCI controller.
   NumberOfBytes  -  On input the number of bytes to map.
                     On output the number of bytes that were mapped.
   DeviceAddress  -  The resulting map address for the bus master PCI
                     controller to use to access the system memory's HostAddress.
   Mapping        -  The value to pass to Unmap() when the bus master DMA
                     operation is complete.

 Returns:

   EFI_SUCCESS            -  Success.
   EFI_INVALID_PARAMETER  -  Invalid parameters found.
   EFI_UNSUPPORTED        -  The HostAddress cannot be mapped as a common
                             buffer.
   EFI_DEVICE_ERROR       -  The System hardware could not map the requested
                             address.
   EFI_OUT_OF_RESOURCES   -  The request could not be completed due to
                             lack of resources.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoUnmap (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
   IN  VOID                             *Mapping
   )
 /*++

 Routine Description:

   Completes the Map() operation and releases any corresponding resources.

 Arguments:

   This     -  Pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Mapping  -  The value returned from Map() operation.

 Returns:

   EFI_SUCCESS            -  The range was unmapped successfully.
   EFI_INVALID_PARAMETER  -  Mapping is not a value that was returned
                             by Map operation.
   EFI_DEVICE_ERROR       -  The data was not committed to the target
                             system memory.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoAllocateBuffer (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
   IN  EFI_ALLOCATE_TYPE                Type,
   IN  EFI_MEMORY_TYPE                  MemoryType,
   IN  UINTN                            Pages,
   OUT VOID                             **HostAddress,
   IN  UINT64                           Attributes
   )
 /*++

 Routine Description:

   Allocates pages that are suitable for a common buffer mapping.

 Arguments:

   This         -  Pointer to EFI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Type         -  Not used and can be ignored.
   MemoryType   -  Type of memory to allocate.
   Pages        -  Number of pages to allocate.
   HostAddress  -  Pointer to store the base system memory address
                   of the allocated range.
   Attributes   -  Requested bit mask of attributes of the allocated
                   range.

 Returns:

   EFI_SUCCESS            -  The requested memory range were allocated.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.
   EFI_UNSUPPORTED        -  Attributes is unsupported.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoFreeBuffer (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
   IN  UINTN                            Pages,
   OUT VOID                             *HostAddress
   )
 /*++

 Routine Description:

   Free memory allocated in AllocateBuffer.

 Arguments:

   This         -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
                   instance.
   Pages        -  Number of pages to free.
   HostAddress  -  The base system memory address of the
                   allocated range.

 Returns:

   EFI_SUCCESS            -  Requested memory pages were freed.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoFlush (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This
   )
 /*++

 Routine Description:

   Flushes all PCI posted write transactions from a PCI host
   bridge to system memory.

 Arguments:

   This  - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.

 Returns:

   EFI_SUCCESS       -  PCI posted write transactions were flushed
                        from PCI host bridge to system memory.
   EFI_DEVICE_ERROR  -  Fail due to hardware error.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoGetAttributes (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
   OUT UINT64                           *Supported,
   OUT UINT64                           *Attributes
   )
 /*++

 Routine Description:

   Get the attributes that a PCI root bridge supports and
   the attributes the PCI root bridge is currently using.

 Arguments:

   This        -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
                  instance.
   Supports    -  A pointer to the mask of attributes that
                  this PCI root bridge supports.
   Attributes  -  A pointer to the mask of attributes that
                  this PCI root bridge is currently using.
 Returns:

   EFI_SUCCESS            -  Success.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.

 --*/

 // GC_TODO:    Supported - add argument and description to function comment
 //
 // GC_TODO:    Supported - add argument and description to function comment
 //
 // GC_TODO:    Supported - add argument and description to function comment
 //
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoSetAttributes (
   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
   IN     UINT64                           Attributes,
   IN OUT UINT64                           *ResourceBase,
   IN OUT UINT64                           *ResourceLength
   )
 /*++

 Routine Description:

   Sets the attributes for a resource range on a PCI root bridge.

 Arguments:

   This            -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Attributes      -  The mask of attributes to set.
   ResourceBase    -  Pointer to the base address of the resource range
                      to be modified by the attributes specified by Attributes.
   ResourceLength  -  Pointer to the length of the resource range to be modified.

 Returns:
   EFI_SUCCESS            -  Success.
   EFI_INVALID_PARAMETER  -  Invalid parameter found.
   EFI_OUT_OF_RESOURCES   -  Not enough resources to set the attributes upon.

 --*/
 ;

 EFI_STATUS
 EFIAPI
 RootBridgeIoConfiguration (
   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
   OUT VOID                             **Resources
   )
 /*++

 Routine Description:

   Retrieves the current resource settings of this PCI root bridge
   in the form of a set of ACPI 2.0 resource descriptor.

 Arguments:

   This       -  Pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
   Resources  -  Pointer to the ACPI 2.0 resource descriptor that
                 describe the current configuration of this PCI root
                 bridge.

 Returns:

   EFI_SUCCESS      -  Success.
   EFI_UNSUPPORTED  -  Current configuration of the PCI root bridge
                       could not be retrieved.

 --*/
 ;

 #endif
	/** @file
	The PCI Root Bridge header file.

	Copyright (c) 2013-2015 Intel Corporation.

	This program and the accompanying materials
	are licensed and made available under the terms and conditions of the BSD License
	which accompanies this distribution. The full text of the license may be found at
	http://opensource.org/licenses/bsd-license.php

	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.


	**/

	#ifndef _PCI_ROOT_BRIDGE_H_
	#define _PCI_ROOT_BRIDGE_H_

	#include <PiDxe.h>
	#include <IndustryStandard/Acpi.h>
	#include <IndustryStandard/Pci.h>
	#include <PciHostResource.h>

	//
	// Driver Consumed Protocol Prototypes
	//
	#include <Protocol/Metronome.h>
	#include <Protocol/CpuIo2.h>
	#include <Protocol/DevicePath.h>
	#include <Protocol/Runtime.h>
	#include <Protocol/PciRootBridgeIo.h>
	#include <Library/UefiLib.h>
	#include <Library/DebugLib.h>
	#include <Library/DevicePathLib.h>
	#include <Library/BaseMemoryLib.h>
	#include <Library/DxeServicesTableLib.h>
	#include <Library/UefiBootServicesTableLib.h>
	#include <Library/BaseLib.h>


	//
	// Define the region of memory used for DMA memory
	//
	#define DMA_MEMORY_TOP 0x0000000001FFFFFFULL

	//
	// The number of PCI root bridges
	//
	#define ROOT_BRIDGE_COUNT 1

	//
	// The default latency for controllers
	//
	#define DEFAULT_PCI_LATENCY 0x20

	//
	// Define resource status constant
	//
	typedef struct {
	EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation;
	UINTN NumberOfBytes;
	UINTN NumberOfPages;
	EFI_PHYSICAL_ADDRESS HostAddress;
	EFI_PHYSICAL_ADDRESS MappedHostAddress;
	} MAP_INFO;

	typedef struct {
	ACPI_HID_DEVICE_PATH AcpiDevicePath;
	EFI_DEVICE_PATH_PROTOCOL EndDevicePath;
	} EFI_PCI_ROOT_BRIDGE_DEVICE_PATH;

	#define PCI_ROOT_BRIDGE_SIGNATURE SIGNATURE_32 ('e', '2', 'p', 'b')

	typedef struct {
	UINT32 Signature;
	EFI_LIST_ENTRY Link;
	EFI_HANDLE Handle;
	UINT64 RootBridgeAllocAttrib;
	UINT64 Attributes;
	UINT64 Supports;
	PCI_RES_NODE ResAllocNode[6];
	PCI_ROOT_BRIDGE_RESOURCE_APERTURE Aperture;
	EFI_LOCK PciLock;
	UINTN PciAddress;
	UINTN PciData;
	UINT32 HecBase;
	UINT32 HecLen;
	UINTN BusScanCount;
	BOOLEAN BusNumberAssigned;
	VOID *ConfigBuffer;
	EFI_DEVICE_PATH_PROTOCOL *DevicePath;
	EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL Io;
	} PCI_ROOT_BRIDGE_INSTANCE;

	//
	// Driver Instance Data Macros
	//
	#define DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(a) CR (a, PCI_ROOT_BRIDGE_INSTANCE, Io, PCI_ROOT_BRIDGE_SIGNATURE)

	#define DRIVER_INSTANCE_FROM_LIST_ENTRY(a) CR (a, PCI_ROOT_BRIDGE_INSTANCE, Link, PCI_ROOT_BRIDGE_SIGNATURE)

	EFI_STATUS
	SimpleIioRootBridgeConstructor (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *Protocol,
	IN EFI_HANDLE HostBridgeHandle,
	IN PCI_ROOT_BRIDGE_RESOURCE_APERTURE *ResAppeture,
	IN UINT64 AllocAttributes
	)
	/*++

	Routine Description:

	Construct the Pci Root Bridge Io protocol.

	Arguments:

	Protocol - Protocol to initialize.
	HostBridgeHandle - Handle to the HostBridge.
	ResAppeture - Resource apperture of the root bridge.
	AllocAttributes - Attribute of resouce allocated.

	Returns:

	EFI_SUCCESS - Success.
	Others - Fail.

	--*/
	;

	//
	// Protocol Member Function Prototypes
	//
	EFI_STATUS
	EFIAPI
	RootBridgeIoPollMem (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 Address,
	IN UINT64 Mask,
	IN UINT64 Value,
	IN UINT64 Delay,
	OUT UINT64 *Result
	)
	/*++

	Routine Description:

	Poll an address in memory mapped space until an exit condition is met
	or a timeout occurs.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Width - Width of the memory operation.
	Address - The base address of the memory operation.
	Mask - Mask used for polling criteria.
	Value - Comparison value used for polling exit criteria.
	Delay - Number of 100ns units to poll.
	Result - Pointer to the last value read from memory location.

	Returns:

	EFI_SUCCESS - Success.
	EFI_INVALID_PARAMETER - Invalid parameter found.
	EFI_TIMEOUT - Delay expired before a match occurred.
	EFI_OUT_OF_RESOURCES - Fail due to lack of resources.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoPollIo (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 Address,
	IN UINT64 Mask,
	IN UINT64 Value,
	IN UINT64 Delay,
	OUT UINT64 *Result
	)
	/*++

	Routine Description:

	Poll an address in I/O space until an exit condition is met
	or a timeout occurs.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Width - Width of I/O operation.
	Address - The base address of the I/O operation.
	Mask - Mask used for polling criteria.
	Value - Comparison value used for polling exit criteria.
	Delay - Number of 100ns units to poll.
	Result - Pointer to the last value read from memory location.

	Returns:

	EFI_SUCCESS - Success.
	EFI_INVALID_PARAMETER - Invalid parameter found.
	EFI_TIMEOUT - Delay expired before a match occurred.
	EFI_OUT_OF_RESOURCES - Fail due to lack of resources.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoMemRead (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 Address,
	IN UINTN Count,
	IN OUT VOID *Buffer
	)
	/*++

	Routine Description:

	Allow read from memory mapped I/O space.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Width - The width of memory operation.
	Address - Base address of the memory operation.
	Count - Number of memory opeartion to perform.
	Buffer - The destination buffer to store data.

	Returns:

	EFI_SUCCESS - Success.
	EFI_INVALID_PARAMETER - Invalid parameter found.
	EFI_OUT_OF_RESOURCES - Fail due to lack of resources.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoMemWrite (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 Address,
	IN UINTN Count,
	IN OUT VOID *Buffer
	)
	/*++

	Routine Description:

	Allow write to memory mapped I/O space.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Width - The width of memory operation.
	Address - Base address of the memory operation.
	Count - Number of memory opeartion to perform.
	Buffer - The source buffer to write data from.

	Returns:

	EFI_SUCCESS - Success.
	EFI_INVALID_PARAMETER - Invalid parameter found.
	EFI_OUT_OF_RESOURCES - Fail due to lack of resources.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoIoRead (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 UserAddress,
	IN UINTN Count,
	IN OUT VOID *UserBuffer
	)
	/*++

	Routine Description:

	Enable a PCI driver to read PCI controller registers in the
	PCI root bridge I/O space.

	Arguments:

	This - A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
	Width - Signifies the width of the memory operation.
	UserAddress - The base address of the I/O operation.
	Count - The number of I/O operations to perform.
	UserBuffer - The destination buffer to store the results.

	Returns:

	EFI_SUCCESS - The data was read from the PCI root bridge.
	EFI_INVALID_PARAMETER - Invalid parameters found.
	EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
	resources.
	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoIoWrite (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 UserAddress,
	IN UINTN Count,
	IN OUT VOID *UserBuffer
	)
	/*++

	Routine Description:

	Enable a PCI driver to write to PCI controller registers in the
	PCI root bridge I/O space.

	Arguments:

	This - A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
	Width - Signifies the width of the memory operation.
	UserAddress - The base address of the I/O operation.
	Count - The number of I/O operations to perform.
	UserBuffer - The source buffer to write data from.

	Returns:

	EFI_SUCCESS - The data was written to the PCI root bridge.
	EFI_INVALID_PARAMETER - Invalid parameters found.
	EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
	resources.
	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoCopyMem (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 DestAddress,
	IN UINT64 SrcAddress,
	IN UINTN Count
	)
	/*++

	Routine Description:

	Copy one region of PCI root bridge memory space to be copied to
	another region of PCI root bridge memory space.

	Arguments:

	This - A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Width - Signifies the width of the memory operation.
	DestAddress - Destination address of the memory operation.
	SrcAddress - Source address of the memory operation.
	Count - Number of memory operations to perform.

	Returns:

	EFI_SUCCESS - The data was copied successfully.
	EFI_INVALID_PARAMETER - Invalid parameters found.
	EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
	resources.
	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoPciRead (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 Address,
	IN UINTN Count,
	IN OUT VOID *Buffer
	)
	/*++

	Routine Description:

	Allows read from PCI configuration space.

	Arguments:

	This - A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
	Width - Signifies the width of the memory operation.
	Address - The address within the PCI configuration space
	for the PCI controller.
	Count - The number of PCI configuration operations
	to perform.
	Buffer - The destination buffer to store the results.

	Returns:

	EFI_SUCCESS - The data was read from the PCI root bridge.
	EFI_INVALID_PARAMETER - Invalid parameters found.
	EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
	resources.
	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoPciWrite (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
	IN UINT64 Address,
	IN UINTN Count,
	IN OUT VOID *Buffer
	)
	/*++

	Routine Description:

	Allows write to PCI configuration space.

	Arguments:

	This - A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
	Width - Signifies the width of the memory operation.
	Address - The address within the PCI configuration space
	for the PCI controller.
	Count - The number of PCI configuration operations
	to perform.
	Buffer - The source buffer to get the results.

	Returns:

	EFI_SUCCESS - The data was written to the PCI root bridge.
	EFI_INVALID_PARAMETER - Invalid parameters found.
	EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
	resources.
	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoMap (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation,
	IN VOID *HostAddress,
	IN OUT UINTN *NumberOfBytes,
	OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
	OUT VOID **Mapping
	)
	/*++

	Routine Description:

	Provides the PCI controller-specific address needed to access
	system memory for DMA.

	Arguments:

	This - A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
	Operation - Indicate if the bus master is going to read or write
	to system memory.
	HostAddress - The system memory address to map on the PCI controller.
	NumberOfBytes - On input the number of bytes to map.
	On output the number of bytes that were mapped.
	DeviceAddress - The resulting map address for the bus master PCI
	controller to use to access the system memory's HostAddress.
	Mapping - The value to pass to Unmap() when the bus master DMA
	operation is complete.

	Returns:

	EFI_SUCCESS - Success.
	EFI_INVALID_PARAMETER - Invalid parameters found.
	EFI_UNSUPPORTED - The HostAddress cannot be mapped as a common
	buffer.
	EFI_DEVICE_ERROR - The System hardware could not map the requested
	address.
	EFI_OUT_OF_RESOURCES - The request could not be completed due to
	lack of resources.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoUnmap (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN VOID *Mapping
	)
	/*++

	Routine Description:

	Completes the Map() operation and releases any corresponding resources.

	Arguments:

	This - Pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Mapping - The value returned from Map() operation.

	Returns:

	EFI_SUCCESS - The range was unmapped successfully.
	EFI_INVALID_PARAMETER - Mapping is not a value that was returned
	by Map operation.
	EFI_DEVICE_ERROR - The data was not committed to the target
	system memory.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoAllocateBuffer (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN EFI_ALLOCATE_TYPE Type,
	IN EFI_MEMORY_TYPE MemoryType,
	IN UINTN Pages,
	OUT VOID **HostAddress,
	IN UINT64 Attributes
	)
	/*++

	Routine Description:

	Allocates pages that are suitable for a common buffer mapping.

	Arguments:

	This - Pointer to EFI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Type - Not used and can be ignored.
	MemoryType - Type of memory to allocate.
	Pages - Number of pages to allocate.
	HostAddress - Pointer to store the base system memory address
	of the allocated range.
	Attributes - Requested bit mask of attributes of the allocated
	range.

	Returns:

	EFI_SUCCESS - The requested memory range were allocated.
	EFI_INVALID_PARAMETER - Invalid parameter found.
	EFI_UNSUPPORTED - Attributes is unsupported.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoFreeBuffer (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN UINTN Pages,
	OUT VOID *HostAddress
	)
	/*++

	Routine Description:

	Free memory allocated in AllocateBuffer.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
	instance.
	Pages - Number of pages to free.
	HostAddress - The base system memory address of the
	allocated range.

	Returns:

	EFI_SUCCESS - Requested memory pages were freed.
	EFI_INVALID_PARAMETER - Invalid parameter found.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoFlush (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This
	)
	/*++

	Routine Description:

	Flushes all PCI posted write transactions from a PCI host
	bridge to system memory.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.

	Returns:

	EFI_SUCCESS - PCI posted write transactions were flushed
	from PCI host bridge to system memory.
	EFI_DEVICE_ERROR - Fail due to hardware error.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoGetAttributes (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	OUT UINT64 *Supported,
	OUT UINT64 *Attributes
	)
	/*++

	Routine Description:

	Get the attributes that a PCI root bridge supports and
	the attributes the PCI root bridge is currently using.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
	instance.
	Supports - A pointer to the mask of attributes that
	this PCI root bridge supports.
	Attributes - A pointer to the mask of attributes that
	this PCI root bridge is currently using.
	Returns:

	EFI_SUCCESS - Success.
	EFI_INVALID_PARAMETER - Invalid parameter found.

	--*/

	// GC_TODO: Supported - add argument and description to function comment
	//
	// GC_TODO: Supported - add argument and description to function comment
	//
	// GC_TODO: Supported - add argument and description to function comment
	//
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoSetAttributes (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	IN UINT64 Attributes,
	IN OUT UINT64 *ResourceBase,
	IN OUT UINT64 *ResourceLength
	)
	/*++

	Routine Description:

	Sets the attributes for a resource range on a PCI root bridge.

	Arguments:

	This - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Attributes - The mask of attributes to set.
	ResourceBase - Pointer to the base address of the resource range
	to be modified by the attributes specified by Attributes.
	ResourceLength - Pointer to the length of the resource range to be modified.

	Returns:
	EFI_SUCCESS - Success.
	EFI_INVALID_PARAMETER - Invalid parameter found.
	EFI_OUT_OF_RESOURCES - Not enough resources to set the attributes upon.

	--*/
	;

	EFI_STATUS
	EFIAPI
	RootBridgeIoConfiguration (
	IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
	OUT VOID **Resources
	)
	/*++

	Routine Description:

	Retrieves the current resource settings of this PCI root bridge
	in the form of a set of ACPI 2.0 resource descriptor.

	Arguments:

	This - Pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
	Resources - Pointer to the ACPI 2.0 resource descriptor that
	describe the current configuration of this PCI root
	bridge.

	Returns:

	EFI_SUCCESS - Success.
	EFI_UNSUPPORTED - Current configuration of the PCI root bridge
	could not be retrieved.

	--*/
	;

	#endif