PciHostBridgeLibNull.c

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#include <PiDxe.h>
#include <Library/PciHostBridgeLib.h>
#include <Library/DebugLib.h>
 
GLOBAL_REMOVE_IF_UNREFERENCED
CHAR16  *mPciHostBridgeLibAcpiAddressSpaceTypeStr[] = {
  L"Mem", L"I/O", L"Bus"
};
 
PCI_ROOT_BRIDGE *
EFIAPI
PciHostBridgeGetRootBridges (
  UINTN  *Count
  )
{
  *Count = 0;
  return NULL;
}
 
VOID
EFIAPI
PciHostBridgeFreeRootBridges (
  PCI_ROOT_BRIDGE  *Bridges,
  UINTN            Count
  )
{
  return;
}
 
VOID
EFIAPI
PciHostBridgeResourceConflict (
  EFI_HANDLE  HostBridgeHandle,
  VOID        *Configuration
  )
{
  EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR  *Descriptor;
  UINTN                              RootBridgeIndex;
 
  DEBUG ((DEBUG_ERROR, "PciHostBridge: Resource conflict happens!\n"));
 
  RootBridgeIndex = 0;
  Descriptor      = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *)Configuration;
  while (Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) {
    DEBUG ((DEBUG_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++));
    for ( ; Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR; Descriptor++) {
      ASSERT (
        Descriptor->ResType <
        (sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr) /
         sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr[0])
        )
        );
      DEBUG ((
        DEBUG_ERROR,
        " %s: Length/Alignment = 0x%lx / 0x%lx\n",
        mPciHostBridgeLibAcpiAddressSpaceTypeStr[Descriptor->ResType],
        Descriptor->AddrLen,
        Descriptor->AddrRangeMax
        ));
      if (Descriptor->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) {
        DEBUG ((
          DEBUG_ERROR,
          "     Granularity/SpecificFlag = %ld / %02x%s\n",
          Descriptor->AddrSpaceGranularity,
          Descriptor->SpecificFlag,
          ((Descriptor->SpecificFlag &
            EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE
            ) != 0) ? L" (Prefetchable)" : L""
          ));
      }
    }
 
    //
    // Skip the END descriptor for root bridge
    //
    ASSERT (Descriptor->Desc == ACPI_END_TAG_DESCRIPTOR);
    Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *)(
                                                       (EFI_ACPI_END_TAG_DESCRIPTOR *)Descriptor + 1
                                                       );
  }
}