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110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/** @file
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Null instance of PCI Host Bridge Library with empty functions.
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Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include <Library/PciHostBridgeLib.h>
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#include <Library/DebugLib.h>
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GLOBAL_REMOVE_IF_UNREFERENCED
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CHAR16 *mPciHostBridgeLibAcpiAddressSpaceTypeStr[] = {
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L"Mem", L"I/O", L"Bus"
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};
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/**
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Return all the root bridge instances in an array.
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@param Count Return the count of root bridge instances.
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@return All the root bridge instances in an array.
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The array should be passed into PciHostBridgeFreeRootBridges()
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when it's not used.
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**/
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PCI_ROOT_BRIDGE *
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EFIAPI
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PciHostBridgeGetRootBridges (
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UINTN *Count
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)
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{
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*Count = 0;
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return NULL;
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}
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/**
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Free the root bridge instances array returned from PciHostBridgeGetRootBridges().
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@param Bridges The root bridge instances array.
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@param Count The count of the array.
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**/
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VOID
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EFIAPI
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PciHostBridgeFreeRootBridges (
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PCI_ROOT_BRIDGE *Bridges,
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UINTN Count
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)
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{
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return;
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}
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/**
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Inform the platform that the resource conflict happens.
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@param HostBridgeHandle Handle of the Host Bridge.
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@param Configuration Pointer to PCI I/O and PCI memory resource
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descriptors. The Configuration contains the resources
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for all the root bridges. The resource for each root
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bridge is terminated with END descriptor and an
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additional END is appended indicating the end of the
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entire resources. The resource descriptor field
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values follow the description in
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EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
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.SubmitResources().
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**/
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VOID
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EFIAPI
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PciHostBridgeResourceConflict (
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EFI_HANDLE HostBridgeHandle,
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VOID *Configuration
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)
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{
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EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor;
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UINTN RootBridgeIndex;
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DEBUG ((EFI_D_ERROR, "PciHostBridge: Resource conflict happens!\n"));
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RootBridgeIndex = 0;
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Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Configuration;
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while (Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) {
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DEBUG ((EFI_D_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++));
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for (; Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR; Descriptor++) {
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ASSERT (Descriptor->ResType <
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(sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr) /
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sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr[0])
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)
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);
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DEBUG ((EFI_D_ERROR, " %s: Length/Alignment = 0x%lx / 0x%lx\n",
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mPciHostBridgeLibAcpiAddressSpaceTypeStr[Descriptor->ResType],
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Descriptor->AddrLen, Descriptor->AddrRangeMax
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));
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if (Descriptor->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) {
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DEBUG ((EFI_D_ERROR, " Granularity/SpecificFlag = %ld / %02x%s\n",
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Descriptor->AddrSpaceGranularity, Descriptor->SpecificFlag,
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((Descriptor->SpecificFlag &
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EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE
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) != 0) ? L" (Prefetchable)" : L""
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));
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}
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}
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//
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// Skip the END descriptor for root bridge
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//
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ASSERT (Descriptor->Desc == ACPI_END_TAG_DESCRIPTOR);
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Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *)(
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(EFI_ACPI_END_TAG_DESCRIPTOR *)Descriptor + 1
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);
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}
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}
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