1 /** @file 2 3 Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR> 4 5 This program and the accompanying materials are licensed and made available under 7 the terms and conditions of the BSD License that accompanies this distribution. 9 The full text of the license may be found at 11 http://opensource.org/licenses/bsd-license.php. 13 15 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 17 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 19 21 23 Module Name: 24 25 SlotConfig.c 26 27 Abstract: 28 29 Sets platform/SKU specific expansion slot information. 30 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
