1 /** @file 2 PCI Host Bridge Library instance for AMD Seattle SOC 3 4 Copyright (c) 2016, Linaro Ltd. 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 #include <Library/DevicePathLib.h> 19 #include <Library/MemoryAllocationLib.h> 20 #include <Library/PcdLib.h> 21 22 #include <Protocol/PciRootBridgeIo.h> 23 #include <Protocol/PciHostBridgeResourceAllocation.h> 24 25 #pragma pack(1) 26 typedef struct { 27 ACPI_HID_DEVICE_PATH AcpiDevicePath; 28 EFI_DEVICE_PATH_PROTOCOL EndDevicePath; 29 } EFI_PCI_ROOT_BRIDGE_DEVICE_PATH; 30 #pragma pack () 31 32 STATIC EFI_PCI_ROOT_BRIDGE_DEVICE_PATH mEfiPciRootBridgeDevicePath = { 33 { 34 { 35 ACPI_DEVICE_PATH, 36 ACPI_DP, 37 { 38 (UINT8) (sizeof(ACPI_HID_DEVICE_PATH)), 39 (UINT8) ((sizeof(ACPI_HID_DEVICE_PATH)) >> 8) 40 } 41 }, 42 EISA_PNP_ID(0x0A08), // PCI Express 43 0 44 }, 45 46 { 47 END_DEVICE_PATH_TYPE, 48 END_ENTIRE_DEVICE_PATH_SUBTYPE, 49 { 50 END_DEVICE_PATH_LENGTH, 51 0 52 } 53 } 54 }; 55 56 GLOBAL_REMOVE_IF_UNREFERENCED 57 CHAR16 *mPciHostBridgeLibAcpiAddressSpaceTypeStr[] = { 58 L"Mem", L"I/O", L"Bus" 59 }; 60 61 /** 62 Return all the root bridge instances in an array. 63 64 @param Count Return the count of root bridge instances. 65 66 @return All the root bridge instances in an array. 67 The array should be passed into PciHostBridgeFreeRootBridges() 68 when it's not used. 69 **/ 70 PCI_ROOT_BRIDGE * 71 EFIAPI 72 PciHostBridgeGetRootBridges ( 73 UINTN *Count 74 ) 75 { 76 PCI_ROOT_BRIDGE *RootBridge; 77 78 *Count = 1; 79 RootBridge = AllocateZeroPool (*Count * sizeof *RootBridge); 80 81 RootBridge->Segment = 0; 82 83 RootBridge->Supports = EFI_PCI_ATTRIBUTE_IDE_PRIMARY_IO | 84 EFI_PCI_ATTRIBUTE_IDE_SECONDARY_IO | 85 EFI_PCI_ATTRIBUTE_ISA_IO_16 | 86 EFI_PCI_ATTRIBUTE_ISA_MOTHERBOARD_IO | 87 EFI_PCI_ATTRIBUTE_VGA_MEMORY | 88 EFI_PCI_ATTRIBUTE_VGA_IO_16 | 89 EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO_16; 90 RootBridge->Attributes = RootBridge->Supports; 91 92 RootBridge->DmaAbove4G = TRUE; 93 94 RootBridge->AllocationAttributes = EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM | 95 EFI_PCI_HOST_BRIDGE_MEM64_DECODE ; 96 97 RootBridge->Bus.Base = PcdGet32 (PcdPciBusMin); 98 RootBridge->Bus.Limit = PcdGet32 (PcdPciBusMax); 99 RootBridge->Io.Base = PcdGet64 (PcdPciIoBase); 100 RootBridge->Io.Limit = PcdGet64 (PcdPciIoBase) + PcdGet64 (PcdPciIoSize) - 1; 101 RootBridge->Mem.Base = PcdGet32 (PcdPciMmio32Base); 102 RootBridge->Mem.Limit = PcdGet32 (PcdPciMmio32Base) + PcdGet32 (PcdPciMmio32Size) - 1; 103 RootBridge->MemAbove4G.Base = PcdGet64 (PcdPciMmio64Base); 104 RootBridge->MemAbove4G.Limit = PcdGet64 (PcdPciMmio64Base) + PcdGet64 (PcdPciMmio64Size) - 1; 105 106 // 107 // No separate ranges for prefetchable and non-prefetchable BARs 108 // 109 RootBridge->PMem.Base = MAX_UINT64; 110 RootBridge->PMem.Limit = 0; 111 RootBridge->PMemAbove4G.Base = MAX_UINT64; 112 RootBridge->PMemAbove4G.Limit = 0; 113 114 ASSERT (FixedPcdGet64 (PcdPciMmio32Translation) == 0); 115 ASSERT (FixedPcdGet64 (PcdPciMmio64Translation) == 0); 116 117 RootBridge->NoExtendedConfigSpace = FALSE; 118 119 RootBridge->DevicePath = (EFI_DEVICE_PATH_PROTOCOL *)&mEfiPciRootBridgeDevicePath; 120 121 return RootBridge; 122 } 123 124 /** 125 Free the root bridge instances array returned from PciHostBridgeGetRootBridges(). 126 127 @param Bridges The root bridge instances array. 128 @param Count The count of the array. 129 **/ 130 VOID 131 EFIAPI 132 PciHostBridgeFreeRootBridges ( 133 PCI_ROOT_BRIDGE *Bridges, 134 UINTN Count 135 ) 136 { 137 FreePool (Bridges); 138 } 139 140 /** 141 Inform the platform that the resource conflict happens. 142 143 @param HostBridgeHandle Handle of the Host Bridge. 144 @param Configuration Pointer to PCI I/O and PCI memory resource 145 descriptors. The Configuration contains the resources 146 for all the root bridges. The resource for each root 147 bridge is terminated with END descriptor and an 148 additional END is appended indicating the end of the 149 entire resources. The resource descriptor field 150 values follow the description in 151 EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL 152 .SubmitResources(). 153 **/ 154 VOID 155 EFIAPI 156 PciHostBridgeResourceConflict ( 157 EFI_HANDLE HostBridgeHandle, 158 VOID *Configuration 159 ) 160 { 161 EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor; 162 UINTN RootBridgeIndex; 163 DEBUG ((EFI_D_ERROR, "PciHostBridge: Resource conflict happens!\n")); 164 165 RootBridgeIndex = 0; 166 Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Configuration; 167 while (Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) { 168 DEBUG ((EFI_D_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++)); 169 for (; Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR; Descriptor++) { 170 ASSERT (Descriptor->ResType < 171 (sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr) / 172 sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr[0]) 173 ) 174 ); 175 DEBUG ((EFI_D_ERROR, " %s: Length/Alignment = 0x%lx / 0x%lx\n", 176 mPciHostBridgeLibAcpiAddressSpaceTypeStr[Descriptor->ResType], 177 Descriptor->AddrLen, Descriptor->AddrRangeMax 178 )); 179 if (Descriptor->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) { 180 DEBUG ((EFI_D_ERROR, " Granularity/SpecificFlag = %ld / %02x%s\n", 181 Descriptor->AddrSpaceGranularity, Descriptor->SpecificFlag, 182 ((Descriptor->SpecificFlag & 183 EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE 184 ) != 0) ? L" (Prefetchable)" : L"" 185 )); 186 } 187 } 188 // 189 // Skip the END descriptor for root bridge 190 // 191 ASSERT (Descriptor->Desc == ACPI_END_TAG_DESCRIPTOR); 192 Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *)( 193 (EFI_ACPI_END_TAG_DESCRIPTOR *)Descriptor + 1 194 ); 195 } 196 } 197
