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