1 /** @file 2 Null instance of PCI Host Bridge Library with empty functions. 3 4 Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> 5 6 This program and the accompanying materials are licensed and made available 7 under the terms and conditions of the BSD License which accompanies this 8 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, WITHOUT 12 WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 **/ 15 #include <PiDxe.h> 16 #include <Library/PciHostBridgeLib.h> 17 #include <Library/DebugLib.h> 18 19 GLOBAL_REMOVE_IF_UNREFERENCED 20 CHAR16 *mPciHostBridgeLibAcpiAddressSpaceTypeStr[] = { 21 L"Mem", L"I/O", L"Bus" 22 }; 23 24 /** 25 Return all the root bridge instances in an array. 26 27 @param Count Return the count of root bridge instances. 28 29 @return All the root bridge instances in an array. 30 The array should be passed into PciHostBridgeFreeRootBridges() 31 when it's not used. 32 **/ 33 PCI_ROOT_BRIDGE * 34 EFIAPI 35 PciHostBridgeGetRootBridges ( 36 UINTN *Count 37 ) 38 { 39 *Count = 0; 40 return NULL; 41 } 42 43 /** 44 Free the root bridge instances array returned from PciHostBridgeGetRootBridges(). 45 46 @param Bridges The root bridge instances array. 47 @param Count The count of the array. 48 **/ 49 VOID 50 EFIAPI 51 PciHostBridgeFreeRootBridges ( 52 PCI_ROOT_BRIDGE *Bridges, 53 UINTN Count 54 ) 55 { 56 return; 57 } 58 59 /** 60 Inform the platform that the resource conflict happens. 61 62 @param HostBridgeHandle Handle of the Host Bridge. 63 @param Configuration Pointer to PCI I/O and PCI memory resource 64 descriptors. The Configuration contains the resources 65 for all the root bridges. The resource for each root 66 bridge is terminated with END descriptor and an 67 additional END is appended indicating the end of the 68 entire resources. The resource descriptor field 69 values follow the description in 70 EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL 71 .SubmitResources(). 72 **/ 73 VOID 74 EFIAPI 75 PciHostBridgeResourceConflict ( 76 EFI_HANDLE HostBridgeHandle, 77 VOID *Configuration 78 ) 79 { 80 EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor; 81 UINTN RootBridgeIndex; 82 DEBUG ((EFI_D_ERROR, "PciHostBridge: Resource conflict happens!\n")); 83 84 RootBridgeIndex = 0; 85 Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Configuration; 86 while (Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) { 87 DEBUG ((EFI_D_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++)); 88 for (; Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR; Descriptor++) { 89 ASSERT (Descriptor->ResType < 90 (sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr) / 91 sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr[0]) 92 ) 93 ); 94 DEBUG ((EFI_D_ERROR, " %s: Length/Alignment = 0x%lx / 0x%lx\n", 95 mPciHostBridgeLibAcpiAddressSpaceTypeStr[Descriptor->ResType], 96 Descriptor->AddrLen, Descriptor->AddrRangeMax 97 )); 98 if (Descriptor->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) { 99 DEBUG ((EFI_D_ERROR, " Granularity/SpecificFlag = %ld / %02x%s\n", 100 Descriptor->AddrSpaceGranularity, Descriptor->SpecificFlag, 101 ((Descriptor->SpecificFlag & 102 EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE 103 ) != 0) ? L" (Prefetchable)" : L"" 104 )); 105 } 106 } 107 // 108 // Skip the END descriptor for root bridge 109 // 110 ASSERT (Descriptor->Desc == ACPI_END_TAG_DESCRIPTOR); 111 Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *)( 112 (EFI_ACPI_END_TAG_DESCRIPTOR *)Descriptor + 1 113 ); 114 } 115 } 116