1 /** @file 2 3 Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR> 4 5 6 This program and the accompanying materials are licensed and made available under 7 8 the terms and conditions of the BSD License that accompanies this distribution. 9 10 The full text of the license may be found at 11 12 http://opensource.org/licenses/bsd-license.php. 13 14 15 16 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 17 18 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 19 20 21 22 23 Module Name: 24 25 SlotConfig.c 26 27 Abstract: 28 29 Sets platform/SKU specific expansion slot information. 30 InitializeSlotInfo()31 32 33 --*/ 34 #include "SlotConfig.h" 35 36 // 37 // Implementation 38 // 39 VOID 40 InitializeSlotInfo ( 41 ) 42 { 43 UINT16 BusSaveState; 44 UINT16 Vendor; 45 UINT8 CurrentBus; 46 UINTN i; 47 UINTN j; 48 EFI_HANDLE Handle; 49 EFI_STATUS Status; 50 BOOLEAN RunNext; 51 52 // 53 // Loop through the slot table and see if any slots have cards in them 54 // 55 for (i = 0; i < mSlotBridgeTableSize; i++) { 56 // 57 // Initialize variable 58 // 59 RunNext = FALSE; 60 61 // 62 // Hide mini PCIe slots per SKU 63 // 64 for (j = 0; j < mSlotInformation.NumberOfEntries; j++) { 65 if (mSlotInformation.SlotEntries[j].SmbiosSlotId == mSlotBridgeTable[i].SmbiosSlotId) { 66 if ((mSlotInformation.SlotEntries[j].SmbiosSlotId == 0x02) && 67 (mBoardFeatures & B_BOARD_FEATURES_NO_MINIPCIE) 68 ) { 69 mSlotInformation.SlotEntries[j].Disabled = TRUE; 70 RunNext = TRUE; 71 } 72 break; 73 } 74 } 75 76 if (RunNext) { 77 // 78 // Skip slot device detection since the slot is disabled. 79 // 80 continue; 81 } 82 83 // 84 // Check to see if the bridge has a bus number and assign one if not 85 // 86 BusSaveState = MmPci16 ( 87 0, 88 mSlotBridgeTable[i].Bus, 89 mSlotBridgeTable[i].Dev, 90 mSlotBridgeTable[i].Function, 91 PCI_BRIDGE_SECONDARY_BUS_REGISTER_OFFSET 92 ); 93 if (BusSaveState == 0) { 94 // 95 // Assign temp bus number 96 // 97 MmPci16 ( 98 0, 99 mSlotBridgeTable[i].Bus, 100 mSlotBridgeTable[i].Dev, 101 mSlotBridgeTable[i].Function, 102 PCI_BRIDGE_SECONDARY_BUS_REGISTER_OFFSET 103 ) = DEF_BUS_CONFIG; 104 CurrentBus = DEF_BUS; 105 } else if (BusSaveState == 0xFFFF) { 106 // 107 // Bridge is disabled so continue with next entry in the table 108 // 109 continue; 110 } else { 111 // 112 // Use existing bus number 113 // 114 CurrentBus = (UINT8) BusSaveState & 0xFF; 115 } 116 117 // 118 // Check to see if a device is behind the bridge 119 // 120 Vendor = MmPci16 ( 121 0, 122 CurrentBus, 123 mSlotBridgeTable[i].TargetDevice, 124 0, 125 0 126 ); 127 if (Vendor != 0xFFFF) { 128 // 129 // Device found so make sure the slot is marked that way 130 // 131 for (j = 0; j < mSlotInformation.NumberOfEntries; j++) { 132 if (mSlotInformation.SlotEntries[j].SmbiosSlotId == mSlotBridgeTable[i].SmbiosSlotId) { 133 mSlotInformation.SlotEntries[j].InUse = TRUE; 134 break; 135 } 136 } 137 } 138 139 // 140 // Restore previous bus information 141 // 142 if (BusSaveState == 0) { 143 MmPci16 ( 144 0, 145 mSlotBridgeTable[i].Bus, 146 mSlotBridgeTable[i].Dev, 147 mSlotBridgeTable[i].Function, 148 PCI_BRIDGE_SECONDARY_BUS_REGISTER_OFFSET 149 ) = 0; 150 } 151 } 152 153 Handle = NULL; 154 Status = gBS->InstallProtocolInterface ( 155 &Handle, 156 &gEfiSmbiosSlotPopulationGuid, 157 EFI_NATIVE_INTERFACE, 158 &mSlotInformation 159 ); 160 ASSERT_EFI_ERROR(Status); 161 162 } 163