OvmfPkg/Library/PciHostBridgeUtilityLib/PciHostBridgeUtilityLib.c

   1 /** @file
   2   Provide common utility functions to PciHostBridgeLib instances in
   3   ArmVirtPkg and OvmfPkg.
   4
   5   Copyright (C) 2016, Red Hat, Inc.
   6   Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
   7   Copyright (c) 2020, Huawei Corporation. All rights reserved.<BR>
   8
   9   SPDX-License-Identifier: BSD-2-Clause-Patent
  10
  11 **/
  12
  13 #include <IndustryStandard/Acpi10.h>
  14 #include <Library/DebugLib.h>
  15 #include <Library/PciHostBridgeUtilityLib.h>
  16
  17
  18 GLOBAL_REMOVE_IF_UNREFERENCED
  19 CHAR16 *mPciHostBridgeUtilityLibAcpiAddressSpaceTypeStr[] = {
  20   L"Mem", L"I/O", L"Bus"
  21 };
  22
  23
  24 /**
  25   Utility function to inform the platform that the resource conflict happens.
  26
  27   @param[in] Configuration  Pointer to PCI I/O and PCI memory resource
  28                             descriptors. The Configuration contains the
  29                             resources for all the root bridges. The resource
  30                             for each root bridge is terminated with END
  31                             descriptor and an additional END is appended
  32                             indicating the end of the entire resources. The
  33                             resource descriptor field values follow the
  34                             description in
  35                             EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
  36                             .SubmitResources().
  37 **/
  38 VOID
  39 EFIAPI
  40 PciHostBridgeUtilityResourceConflict (
  41   IN VOID  *Configuration
  42   )
  43 {
  44   EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor;
  45   UINTN                             RootBridgeIndex;
  46   DEBUG ((DEBUG_ERROR, "PciHostBridge: Resource conflict happens!\n"));
  47
  48   RootBridgeIndex = 0;
  49   Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Configuration;
  50   while (Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) {
  51     DEBUG ((DEBUG_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++));
  52     for (; Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR; Descriptor++) {
  53       ASSERT (Descriptor->ResType <
  54               ARRAY_SIZE (mPciHostBridgeUtilityLibAcpiAddressSpaceTypeStr)
  55               );
  56       DEBUG ((DEBUG_ERROR, " %s: Length/Alignment = 0x%lx / 0x%lx\n",
  57               mPciHostBridgeUtilityLibAcpiAddressSpaceTypeStr[Descriptor->ResType],
  58               Descriptor->AddrLen, Descriptor->AddrRangeMax
  59               ));
  60       if (Descriptor->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) {
  61         DEBUG ((DEBUG_ERROR, "     Granularity/SpecificFlag = %ld / %02x%s\n",
  62                 Descriptor->AddrSpaceGranularity, Descriptor->SpecificFlag,
  63                 ((Descriptor->SpecificFlag &
  64                   EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE
  65                   ) != 0) ? L" (Prefetchable)" : L""
  66                 ));
  67       }
  68     }
  69     //
  70     // Skip the END descriptor for root bridge
  71     //
  72     ASSERT (Descriptor->Desc == ACPI_END_TAG_DESCRIPTOR);
  73     Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *)(
  74                    (EFI_ACPI_END_TAG_DESCRIPTOR *)Descriptor + 1
  75                    );
  76   }
  77 }
  78