Vlv2TbltDevicePkg/PlatformDxe/SlotConfig.c

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