MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h

   1 /** @file
   2
   3   The PCI Root Bridge header file.
   4
   5 Copyright (c) 1999 - 2016, Intel Corporation. All rights reserved.<BR>
   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 #ifndef _PCI_ROOT_BRIDGE_H_
  17 #define _PCI_ROOT_BRIDGE_H_
  18
  19 #include <PiDxe.h>
  20 #include <IndustryStandard/Acpi.h>
  21 #include <IndustryStandard/Pci.h>
  22
  23 //
  24 // Driver Consumed Protocol Prototypes
  25 //
  26 #include <Protocol/Metronome.h>
  27 #include <Protocol/CpuIo2.h>
  28 #include <Protocol/DevicePath.h>
  29 #include <Protocol/PciRootBridgeIo.h>
  30 #include <Library/DebugLib.h>
  31 #include <Library/DevicePathLib.h>
  32 #include <Library/BaseMemoryLib.h>
  33 #include <Library/DxeServicesTableLib.h>
  34 #include <Library/UefiBootServicesTableLib.h>
  35 #include <Library/BaseLib.h>
  36 #include <Library/PciSegmentLib.h>
  37 #include "PciHostResource.h"
  38
  39
  40 typedef enum {
  41   IoOperation,
  42   MemOperation,
  43   PciOperation
  44 } OPERATION_TYPE;
  45
  46 #define MAP_INFO_SIGNATURE  SIGNATURE_32 ('_', 'm', 'a', 'p')
  47 typedef struct {
  48   UINT32                                    Signature;
  49   LIST_ENTRY                                Link;
  50   EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation;
  51   UINTN                                     NumberOfBytes;
  52   UINTN                                     NumberOfPages;
  53   EFI_PHYSICAL_ADDRESS                      HostAddress;
  54   EFI_PHYSICAL_ADDRESS                      MappedHostAddress;
  55 } MAP_INFO;
  56 #define MAP_INFO_FROM_LINK(a) CR (a, MAP_INFO, Link, MAP_INFO_SIGNATURE)
  57
  58 #define PCI_ROOT_BRIDGE_SIGNATURE SIGNATURE_32 ('_', 'p', 'r', 'b')
  59
  60 typedef struct {
  61   UINT32                            Signature;
  62   LIST_ENTRY                        Link;
  63   EFI_HANDLE                        Handle;
  64   UINT64                            AllocationAttributes;
  65   UINT64                            Attributes;
  66   UINT64                            Supports;
  67   PCI_RES_NODE                      ResAllocNode[TypeMax];
  68   PCI_ROOT_BRIDGE_APERTURE          Bus;
  69   PCI_ROOT_BRIDGE_APERTURE          Io;
  70   PCI_ROOT_BRIDGE_APERTURE          Mem;
  71   PCI_ROOT_BRIDGE_APERTURE          PMem;
  72   PCI_ROOT_BRIDGE_APERTURE          MemAbove4G;
  73   PCI_ROOT_BRIDGE_APERTURE          PMemAbove4G;
  74   BOOLEAN                           DmaAbove4G;
  75   BOOLEAN                           NoExtendedConfigSpace;
  76   VOID                              *ConfigBuffer;
  77   EFI_DEVICE_PATH_PROTOCOL          *DevicePath;
  78   CHAR16                            *DevicePathStr;
  79   EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL   RootBridgeIo;
  80
  81   BOOLEAN                           ResourceSubmitted;
  82   LIST_ENTRY                        Maps;
  83 } PCI_ROOT_BRIDGE_INSTANCE;
  84
  85 #define ROOT_BRIDGE_FROM_THIS(a) CR (a, PCI_ROOT_BRIDGE_INSTANCE, RootBridgeIo, PCI_ROOT_BRIDGE_SIGNATURE)
  86
  87 #define ROOT_BRIDGE_FROM_LINK(a) CR (a, PCI_ROOT_BRIDGE_INSTANCE, Link, PCI_ROOT_BRIDGE_SIGNATURE)
  88
  89 /**
  90   Construct the Pci Root Bridge instance.
  91
  92   @param Bridge            The root bridge instance.
  93
  94   @return The pointer to PCI_ROOT_BRIDGE_INSTANCE just created
  95           or NULL if creation fails.
  96 **/
  97 PCI_ROOT_BRIDGE_INSTANCE *
  98 CreateRootBridge (
  99   IN PCI_ROOT_BRIDGE       *Bridge
 100   );
 101
 102 //
 103 // Protocol Member Function Prototypes
 104 //
 105 /**
 106
 107   Poll an address in memory mapped space until an exit condition is met
 108   or a timeout occurs.
 109
 110   @param This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 111   @param Width    -  Width of the memory operation.
 112   @param Address  -  The base address of the memory operation.
 113   @param Mask     -  Mask used for polling criteria.
 114   @param Value    -  Comparison value used for polling exit criteria.
 115   @param Delay    -  Number of 100ns units to poll.
 116   @param Result   -  Pointer to the last value read from memory location.
 117
 118   @retval EFI_SUCCESS            -  Success.
 119   @retval EFI_INVALID_PARAMETER  -  Invalid parameter found.
 120   @retval EFI_TIMEOUT            -  Delay expired before a match occurred.
 121   @retval EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.
 122
 123 **/
 124 EFI_STATUS
 125 EFIAPI
 126 RootBridgeIoPollMem (
 127   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 128   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 129   IN  UINT64                                 Address,
 130   IN  UINT64                                 Mask,
 131   IN  UINT64                                 Value,
 132   IN  UINT64                                 Delay,
 133   OUT UINT64                                 *Result
 134   )
 135 ;
 136
 137 /**
 138
 139   Poll an address in I/O space until an exit condition is met
 140   or a timeout occurs.
 141
 142   @param This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 143   @param Width    -  Width of I/O operation.
 144   @param Address  -  The base address of the I/O operation.
 145   @param Mask     -  Mask used for polling criteria.
 146   @param Value    -  Comparison value used for polling exit criteria.
 147   @param Delay    -  Number of 100ns units to poll.
 148   @param Result   -  Pointer to the last value read from memory location.
 149
 150   @retval EFI_SUCCESS            -  Success.
 151   @retval EFI_INVALID_PARAMETER  -  Invalid parameter found.
 152   @retval EFI_TIMEOUT            -  Delay expired before a match occurred.
 153   @retval EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.
 154
 155 **/
 156 EFI_STATUS
 157 EFIAPI
 158 RootBridgeIoPollIo (
 159   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 160   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 161   IN  UINT64                                 Address,
 162   IN  UINT64                                 Mask,
 163   IN  UINT64                                 Value,
 164   IN  UINT64                                 Delay,
 165   OUT UINT64                                 *Result
 166   )
 167 ;
 168
 169 /**
 170
 171   Allow read from memory mapped I/O space.
 172
 173   @param This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 174   @param Width    -  The width of memory operation.
 175   @param Address  -  Base address of the memory operation.
 176   @param Count    -  Number of memory opeartion to perform.
 177   @param Buffer   -  The destination buffer to store data.
 178
 179   @retval EFI_SUCCESS            -  Success.
 180   @retval EFI_INVALID_PARAMETER  -  Invalid parameter found.
 181   @retval EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.
 182
 183 **/
 184 EFI_STATUS
 185 EFIAPI
 186 RootBridgeIoMemRead (
 187   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 188   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 189   IN     UINT64                                 Address,
 190   IN     UINTN                                  Count,
 191   IN OUT VOID                                   *Buffer
 192   )
 193 ;
 194
 195 /**
 196
 197   Allow write to memory mapped I/O space.
 198
 199   @param This     -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 200   @param Width    -  The width of memory operation.
 201   @param Address  -  Base address of the memory operation.
 202   @param Count    -  Number of memory opeartion to perform.
 203   @param Buffer   -  The source buffer to write data from.
 204
 205   @retval EFI_SUCCESS            -  Success.
 206   @retval EFI_INVALID_PARAMETER  -  Invalid parameter found.
 207   @retval EFI_OUT_OF_RESOURCES   -  Fail due to lack of resources.
 208
 209 **/
 210 EFI_STATUS
 211 EFIAPI
 212 RootBridgeIoMemWrite (
 213   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 214   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 215   IN     UINT64                                 Address,
 216   IN     UINTN                                  Count,
 217   IN OUT VOID                                   *Buffer
 218   )
 219 ;
 220
 221 /**
 222
 223   Enable a PCI driver to read PCI controller registers in the
 224   PCI root bridge I/O space.
 225
 226   @param This         -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
 227   @param Width        -  Signifies the width of the memory operation.
 228   @param UserAddress  -  The base address of the I/O operation.
 229   @param Count        -  The number of I/O operations to perform.
 230   @param UserBuffer   -  The destination buffer to store the results.
 231
 232   @retval EFI_SUCCESS            -  The data was read from the PCI root bridge.
 233   @retval EFI_INVALID_PARAMETER  -  Invalid parameters found.
 234   @retval EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
 235                             @retval resources.
 236 **/
 237 EFI_STATUS
 238 EFIAPI
 239 RootBridgeIoIoRead (
 240   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 241   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 242   IN     UINT64                                 UserAddress,
 243   IN     UINTN                                  Count,
 244   IN OUT VOID                                   *UserBuffer
 245   )
 246 ;
 247
 248 /**
 249
 250   Enable a PCI driver to write to PCI controller registers in the
 251   PCI root bridge I/O space.
 252
 253   @param This         -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
 254   @param Width        -  Signifies the width of the memory operation.
 255   @param UserAddress  -  The base address of the I/O operation.
 256   @param Count        -  The number of I/O operations to perform.
 257   @param UserBuffer   -  The source buffer to write data from.
 258
 259   @retval EFI_SUCCESS            -  The data was written to the PCI root bridge.
 260   @retval EFI_INVALID_PARAMETER  -  Invalid parameters found.
 261   @retval EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
 262                             @retval resources.
 263 **/
 264 EFI_STATUS
 265 EFIAPI
 266 RootBridgeIoIoWrite (
 267   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 268   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 269   IN     UINT64                                 UserAddress,
 270   IN     UINTN                                  Count,
 271   IN OUT VOID                                   *UserBuffer
 272   )
 273 ;
 274
 275 /**
 276
 277   Copy one region of PCI root bridge memory space to be copied to
 278   another region of PCI root bridge memory space.
 279
 280   @param This         -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 281   @param Width        -  Signifies the width of the memory operation.
 282   @param DestAddress  -  Destination address of the memory operation.
 283   @param SrcAddress   -  Source address of the memory operation.
 284   @param Count        -  Number of memory operations to perform.
 285
 286   @retval EFI_SUCCESS            -  The data was copied successfully.
 287   @retval EFI_INVALID_PARAMETER  -  Invalid parameters found.
 288   @retval EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
 289                             @retval resources.
 290 **/
 291 EFI_STATUS
 292 EFIAPI
 293 RootBridgeIoCopyMem (
 294   IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL          *This,
 295   IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH    Width,
 296   IN UINT64                                   DestAddress,
 297   IN UINT64                                   SrcAddress,
 298   IN UINTN                                    Count
 299   )
 300 ;
 301
 302 /**
 303
 304   Allows read from PCI configuration space.
 305
 306   @param This     -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
 307   @param Width    -  Signifies the width of the memory operation.
 308   @param Address  -  The address within the PCI configuration space
 309                      for the PCI controller.
 310   @param Count    -  The number of PCI configuration operations
 311                      to perform.
 312   @param Buffer   -  The destination buffer to store the results.
 313
 314   @retval EFI_SUCCESS            -  The data was read from the PCI root bridge.
 315   @retval EFI_INVALID_PARAMETER  -  Invalid parameters found.
 316   @retval EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
 317                             @retval resources.
 318 **/
 319 EFI_STATUS
 320 EFIAPI
 321 RootBridgeIoPciRead (
 322   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 323   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 324   IN     UINT64                                 Address,
 325   IN     UINTN                                  Count,
 326   IN OUT VOID                                   *Buffer
 327   )
 328 ;
 329
 330 /**
 331
 332   Allows write to PCI configuration space.
 333
 334   @param This     -  A pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
 335   @param Width    -  Signifies the width of the memory operation.
 336   @param Address  -  The address within the PCI configuration space
 337                      for the PCI controller.
 338   @param Count    -  The number of PCI configuration operations
 339                      to perform.
 340   @param Buffer   -  The source buffer to get the results.
 341
 342   @retval EFI_SUCCESS            -  The data was written to the PCI root bridge.
 343   @retval EFI_INVALID_PARAMETER  -  Invalid parameters found.
 344   @retval EFI_OUT_OF_RESOURCES   -  The request could not be completed due to a lack of
 345                             @retval resources.
 346 **/
 347 EFI_STATUS
 348 EFIAPI
 349 RootBridgeIoPciWrite (
 350   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL        *This,
 351   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
 352   IN     UINT64                                 Address,
 353   IN     UINTN                                  Count,
 354   IN OUT VOID                                   *Buffer
 355   )
 356 ;
 357
 358 /**
 359   Provides the PCI controller-specific address needed to access
 360   system memory for DMA.
 361
 362   @param This           A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
 363   @param Operation      Indicate if the bus master is going to read or write
 364                         to system memory.
 365   @param HostAddress    The system memory address to map on the PCI controller.
 366   @param NumberOfBytes  On input the number of bytes to map.
 367                         On output the number of bytes that were mapped.
 368   @param DeviceAddress  The resulting map address for the bus master PCI
 369                         controller to use to access the system memory's HostAddress.
 370   @param Mapping        The value to pass to Unmap() when the bus master DMA
 371                         operation is complete.
 372
 373   @retval EFI_SUCCESS            Success.
 374   @retval EFI_INVALID_PARAMETER  Invalid parameters found.
 375   @retval EFI_UNSUPPORTED        The HostAddress cannot be mapped as a common buffer.
 376   @retval EFI_DEVICE_ERROR       The System hardware could not map the requested address.
 377   @retval EFI_OUT_OF_RESOURCES   The request could not be completed due to lack of resources.
 378 **/
 379 EFI_STATUS
 380 EFIAPI
 381 RootBridgeIoMap (
 382   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL            *This,
 383   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION  Operation,
 384   IN     VOID                                       *HostAddress,
 385   IN OUT UINTN                                      *NumberOfBytes,
 386   OUT    EFI_PHYSICAL_ADDRESS                       *DeviceAddress,
 387   OUT    VOID                                       **Mapping
 388   )
 389 ;
 390
 391 /**
 392   Completes the Map() operation and releases any corresponding resources.
 393
 394   The Unmap() function completes the Map() operation and releases any
 395   corresponding resources.
 396   If the operation was an EfiPciOperationBusMasterWrite or
 397   EfiPciOperationBusMasterWrite64, the data is committed to the target system
 398   memory.
 399   Any resources used for the mapping are freed.
 400
 401   @param[in] This      A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
 402   @param[in] Mapping   The mapping value returned from Map().
 403
 404   @retval EFI_SUCCESS            The range was unmapped.
 405   @retval EFI_INVALID_PARAMETER  Mapping is not a value that was returned by Map().
 406   @retval EFI_DEVICE_ERROR       The data was not committed to the target system memory.
 407 **/
 408 EFI_STATUS
 409 EFIAPI
 410 RootBridgeIoUnmap (
 411   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
 412   IN  VOID                             *Mapping
 413   )
 414 ;
 415
 416 /**
 417   Allocates pages that are suitable for an EfiPciOperationBusMasterCommonBuffer
 418   or EfiPciOperationBusMasterCommonBuffer64 mapping.
 419
 420   @param This        A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
 421   @param Type        This parameter is not used and must be ignored.
 422   @param MemoryType  The type of memory to allocate, EfiBootServicesData or
 423                      EfiRuntimeServicesData.
 424   @param Pages       The number of pages to allocate.
 425   @param HostAddress A pointer to store the base system memory address of the
 426                      allocated range.
 427   @param Attributes  The requested bit mask of attributes for the allocated
 428                      range. Only the attributes
 429                      EFI_PCI_ATTRIBUTE_MEMORY_WRITE_COMBINE,
 430                      EFI_PCI_ATTRIBUTE_MEMORY_CACHED, and
 431                      EFI_PCI_ATTRIBUTE_DUAL_ADDRESS_CYCLE may be used with this
 432                      function.
 433
 434   @retval EFI_SUCCESS            The requested memory pages were allocated.
 435   @retval EFI_INVALID_PARAMETER  MemoryType is invalid.
 436   @retval EFI_INVALID_PARAMETER  HostAddress is NULL.
 437   @retval EFI_UNSUPPORTED        Attributes is unsupported. The only legal
 438                                  attribute bits are MEMORY_WRITE_COMBINE,
 439                                  MEMORY_CACHED, and DUAL_ADDRESS_CYCLE.
 440   @retval EFI_OUT_OF_RESOURCES   The memory pages could not be allocated.
 441 **/
 442 EFI_STATUS
 443 EFIAPI
 444 RootBridgeIoAllocateBuffer (
 445   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
 446   IN  EFI_ALLOCATE_TYPE                Type,
 447   IN  EFI_MEMORY_TYPE                  MemoryType,
 448   IN  UINTN                            Pages,
 449   OUT VOID                             **HostAddress,
 450   IN  UINT64                           Attributes
 451   )
 452 ;
 453
 454 /**
 455
 456   Free memory allocated in AllocateBuffer.
 457
 458   @param This         -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
 459                          instance.
 460   @param Pages        -  Number of pages to free.
 461   @param HostAddress  -  The base system memory address of the
 462                          allocated range.
 463
 464   @retval EFI_SUCCESS            -  Requested memory pages were freed.
 465   @retval EFI_INVALID_PARAMETER  -  Invalid parameter found.
 466
 467 **/
 468 EFI_STATUS
 469 EFIAPI
 470 RootBridgeIoFreeBuffer (
 471   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
 472   IN  UINTN                            Pages,
 473   OUT VOID                             *HostAddress
 474   )
 475 ;
 476
 477 /**
 478
 479   Flushes all PCI posted write transactions from a PCI host
 480   bridge to system memory.
 481
 482   @param This  - Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 483
 484   @retval EFI_SUCCESS       -  PCI posted write transactions were flushed
 485                        @retval from PCI host bridge to system memory.
 486   @retval EFI_DEVICE_ERROR  -  Fail due to hardware error.
 487
 488 **/
 489 EFI_STATUS
 490 EFIAPI
 491 RootBridgeIoFlush (
 492   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This
 493   )
 494 ;
 495
 496 /**
 497   Gets the attributes that a PCI root bridge supports setting with
 498   SetAttributes(), and the attributes that a PCI root bridge is currently
 499   using.
 500
 501   The GetAttributes() function returns the mask of attributes that this PCI
 502   root bridge supports and the mask of attributes that the PCI root bridge is
 503   currently using.
 504
 505   @param This        A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
 506   @param Supported   A pointer to the mask of attributes that this PCI root
 507                      bridge supports setting with SetAttributes().
 508   @param Attributes  A pointer to the mask of attributes that this PCI root
 509                      bridge is currently using.
 510
 511   @retval  EFI_SUCCESS           If Supports is not NULL, then the attributes
 512                                  that the PCI root bridge supports is returned
 513                                  in Supports. If Attributes is not NULL, then
 514                                  the attributes that the PCI root bridge is
 515                                  currently using is returned in Attributes.
 516   @retval  EFI_INVALID_PARAMETER Both Supports and Attributes are NULL.
 517 **/
 518 EFI_STATUS
 519 EFIAPI
 520 RootBridgeIoGetAttributes (
 521   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
 522   OUT UINT64                           *Supported,
 523   OUT UINT64                           *Attributes
 524   )
 525 ;
 526
 527 /**
 528
 529   Sets the attributes for a resource range on a PCI root bridge.
 530
 531   @param This            -  Pointer to EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 532   @param Attributes      -  The mask of attributes to set.
 533   @param ResourceBase    -  Pointer to the base address of the resource range
 534                             to be modified by the attributes specified by Attributes.
 535   @param ResourceLength  -  Pointer to the length of the resource range to be modified.
 536
 537   @retval EFI_SUCCESS            -  Success.
 538   @retval EFI_INVALID_PARAMETER  -  Invalid parameter found.
 539   @retval EFI_OUT_OF_RESOURCES   -  Not enough resources to set the attributes upon.
 540
 541 **/
 542 EFI_STATUS
 543 EFIAPI
 544 RootBridgeIoSetAttributes (
 545   IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
 546   IN     UINT64                           Attributes,
 547   IN OUT UINT64                           *ResourceBase,
 548   IN OUT UINT64                           *ResourceLength
 549   )
 550 ;
 551
 552 /**
 553
 554   Retrieves the current resource settings of this PCI root bridge
 555   in the form of a set of ACPI 2.0 resource descriptor.
 556
 557   @param This       -  Pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
 558   @param Resources  -  Pointer to the ACPI 2.0 resource descriptor that
 559                        describe the current configuration of this PCI root
 560                        bridge.
 561
 562   @retval EFI_SUCCESS      -  Success.
 563   @retval EFI_UNSUPPORTED  -  Current configuration of the PCI root bridge
 564                       @retval could not be retrieved.
 565
 566 **/
 567 EFI_STATUS
 568 EFIAPI
 569 RootBridgeIoConfiguration (
 570   IN  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
 571   OUT VOID                             **Resources
 572   )
 573 ;
 574
 575
 576 extern EFI_METRONOME_ARCH_PROTOCOL *mMetronome;
 577 extern EFI_CPU_IO2_PROTOCOL         *mCpuIo;
 578 #endif