EdkNt32Pkg/Pei/FlashMap/FlashMap.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   FlashMap.c
  15
  16 Abstract:
  17
  18   PEIM to build GUIDed HOBs for platform specific flash map
  19
  20 --*/
  21
  22
  23 #include <FlashLayout.h>
  24
  25 EFI_STATUS
  26 EFIAPI
  27 GetAreaInfo (
  28   IN  EFI_PEI_SERVICES            **PeiServices,
  29   IN PEI_FLASH_MAP_PPI            *This,
  30   IN  EFI_FLASH_AREA_TYPE         AreaType,
  31   IN  EFI_GUID                    *AreaTypeGuid,
  32   OUT UINT32                      *NumEntries,
  33   OUT EFI_FLASH_SUBAREA_ENTRY     **Entries
  34   );
  35
  36 EFI_STATUS
  37 EFIAPI
  38 MemoryDiscoveredPpiNotifyCallback (
  39   IN EFI_PEI_SERVICES           **PeiServices,
  40   IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDescriptor,
  41   IN VOID                       *Ppi
  42   );
  43
  44 //
  45 // Module globals
  46 //
  47 static PEI_FLASH_MAP_PPI      mFlashMapPpi = { GetAreaInfo };
  48
  49 static EFI_PEI_PPI_DESCRIPTOR mPpiListFlashMap = {
  50   (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
  51   &gPeiFlashMapPpiGuid,
  52   &mFlashMapPpi
  53 };
  54
  55 static EFI_FLASH_AREA_DATA    mFlashAreaData[] = {
  56   //
  57   // Variable area
  58   //
  59   {
  60     EFI_VARIABLE_STORE_OFFSET,
  61     EFI_VARIABLE_STORE_LENGTH,
  62     EFI_FLASH_AREA_SUBFV | EFI_FLASH_AREA_MEMMAPPED_FV,
  63     EFI_FLASH_AREA_EFI_VARIABLES
  64   },
  65   //
  66   // FTW spare (backup) block
  67   //
  68   {
  69     EFI_WINNT_FTW_SPARE_BLOCK_OFFSET,
  70     EFI_WINNT_FTW_SPARE_BLOCK_LENGTH,
  71     EFI_FLASH_AREA_SUBFV | EFI_FLASH_AREA_MEMMAPPED_FV,
  72     EFI_FLASH_AREA_FTW_BACKUP
  73   },
  74   //
  75   // FTW private working (state) area
  76   //
  77   {
  78     EFI_FTW_WORKING_OFFSET,
  79     EFI_FTW_WORKING_LENGTH,
  80     EFI_FLASH_AREA_SUBFV | EFI_FLASH_AREA_MEMMAPPED_FV,
  81     EFI_FLASH_AREA_FTW_STATE
  82   },
  83   //
  84   // Recovery FV
  85   //
  86   {
  87     EFI_WINNT_FIRMWARE_OFFSET,
  88     EFI_WINNT_FIRMWARE_LENGTH,
  89     EFI_FLASH_AREA_FV | EFI_FLASH_AREA_MEMMAPPED_FV,
  90     EFI_FLASH_AREA_RECOVERY_BIOS
  91   },
  92   //
  93   // System Non-Volatile Storage FV
  94   //
  95   {
  96     EFI_WINNT_RUNTIME_UPDATABLE_OFFSET,
  97     EFI_WINNT_RUNTIME_UPDATABLE_LENGTH + EFI_WINNT_FTW_SPARE_BLOCK_LENGTH,
  98     EFI_FLASH_AREA_FV | EFI_FLASH_AREA_MEMMAPPED_FV,
  99     EFI_FLASH_AREA_GUID_DEFINED
 100   },
 101 };
 102
 103
 104 EFI_STATUS
 105 EFIAPI
 106 PeimInitializeFlashMap (
 107   IN EFI_FFS_FILE_HEADER       *FfsHeader,
 108   IN EFI_PEI_SERVICES          **PeiServices
 109   )
 110 /*++
 111
 112 Routine Description:
 113   Build GUIDed HOBs for platform specific flash map
 114
 115 Arguments:
 116   FfsHeader   - A pointer to the EFI_FFS_FILE_HEADER structure.
 117   PeiServices - General purpose services available to every PEIM.
 118
 119 Returns:
 120   EFI_STATUS
 121
 122 --*/
 123 // TODO:    EFI_SUCCESS - add return value to function comment
 124 {
 125   EFI_STATUS              Status;
 126   NT_FWH_PPI              *NtFwhPpi;
 127   EFI_PEI_PPI_DESCRIPTOR  *PpiDescriptor;
 128   EFI_PHYSICAL_ADDRESS    FdBase;
 129   UINT64                  FdSize;
 130   UINTN                   NumOfHobData;
 131   UINTN                   Index;
 132   EFI_FLASH_AREA_HOB_DATA FlashHobData;
 133
 134   DEBUG ((EFI_D_ERROR, "NT 32 Flash Map PEIM Loaded\n"));
 135
 136   //
 137   // Install FlashMap PPI
 138   //
 139   Status = PeiServicesInstallPpi (&mPpiListFlashMap);
 140   ASSERT_EFI_ERROR (Status);
 141
 142
 143   //
 144   // Get the Fwh Information PPI
 145   //
 146   Status = PeiServicesLocatePpi (
 147             &gNtFwhPpiGuid, // GUID
 148             0,              // INSTANCE
 149             &PpiDescriptor, // EFI_PEI_PPI_DESCRIPTOR
 150             &NtFwhPpi       // PPI
 151             );
 152   ASSERT_EFI_ERROR (Status);
 153
 154   //
 155   // Assume that FD0 contains the Flash map.
 156   //
 157   Status = NtFwhPpi->NtFwh (0, &FdBase, &FdSize);
 158   if (EFI_ERROR (Status)) {
 159     return Status;
 160   }
 161
 162   //
 163   // Get number of types
 164   //
 165   NumOfHobData = sizeof (mFlashAreaData) / sizeof (EFI_FLASH_AREA_DATA);
 166
 167   //
 168   // Build flash area entries as GUIDed HOBs.
 169   //
 170   for (Index = 0; Index < NumOfHobData; Index++) {
 171     (*PeiServices)->SetMem (&FlashHobData, sizeof (EFI_FLASH_AREA_HOB_DATA), 0);
 172
 173     FlashHobData.AreaType               = mFlashAreaData[Index].AreaType;
 174     FlashHobData.NumberOfEntries        = 1;
 175     FlashHobData.SubAreaData.Attributes = mFlashAreaData[Index].Attributes;
 176     FlashHobData.SubAreaData.Base       = FdBase + (EFI_PHYSICAL_ADDRESS) (UINTN) mFlashAreaData[Index].Base;
 177     FlashHobData.SubAreaData.Length     = (EFI_PHYSICAL_ADDRESS) (UINTN) mFlashAreaData[Index].Length;
 178
 179     switch (FlashHobData.AreaType) {
 180     case EFI_FLASH_AREA_RECOVERY_BIOS:
 181     case EFI_FLASH_AREA_MAIN_BIOS:
 182       (*PeiServices)->CopyMem (
 183                         &FlashHobData.AreaTypeGuid,
 184                         &gEfiFirmwareFileSystemGuid,
 185                         sizeof (EFI_GUID)
 186                         );
 187       (*PeiServices)->CopyMem (
 188                         &FlashHobData.SubAreaData.FileSystem,
 189                         &gEfiFirmwareVolumeBlockProtocolGuid,
 190                         sizeof (EFI_GUID)
 191                         );
 192       break;
 193
 194     case EFI_FLASH_AREA_GUID_DEFINED:
 195       (*PeiServices)->CopyMem (
 196                         &FlashHobData.AreaTypeGuid,
 197                         &gEfiSystemNvDataHobGuid,
 198                         sizeof (EFI_GUID)
 199                         );
 200       (*PeiServices)->CopyMem (
 201                         &FlashHobData.SubAreaData.FileSystem,
 202                         &gEfiFirmwareVolumeBlockProtocolGuid,
 203                         sizeof (EFI_GUID)
 204                         );
 205
 206       //
 207       // We also update a PCD entry so that any driver that depend on
 208       // PCD entry PcdFlashNvStorageVariableBase will get the information.
 209       //
 210       PcdSet32 (PcdFlashNvStorageVariableBase, (UINT32) FlashHobData.SubAreaData.Base);
 211       break;
 212
 213     default:
 214       break;
 215     }
 216
 217     BuildGuidDataHob (
 218       &gEfiFlashMapHobGuid,
 219       &FlashHobData,
 220       sizeof (EFI_FLASH_AREA_HOB_DATA)
 221       );
 222   }
 223
 224   return EFI_SUCCESS;
 225 }
 226
 227 EFI_STATUS
 228 EFIAPI
 229 GetAreaInfo (
 230   IN  EFI_PEI_SERVICES            **PeiServices,
 231   IN PEI_FLASH_MAP_PPI            *This,
 232   IN  EFI_FLASH_AREA_TYPE         AreaType,
 233   IN  EFI_GUID                    *AreaTypeGuid,
 234   OUT UINT32                      *NumEntries,
 235   OUT EFI_FLASH_SUBAREA_ENTRY     **Entries
 236   )
 237 /*++
 238
 239   Routine Description:
 240     Implementation of Flash Map PPI
 241
 242 --*/
 243 // TODO: function comment is missing 'Arguments:'
 244 // TODO: function comment is missing 'Returns:'
 245 // TODO:    PeiServices - add argument and description to function comment
 246 // TODO:    This - add argument and description to function comment
 247 // TODO:    AreaType - add argument and description to function comment
 248 // TODO:    AreaTypeGuid - add argument and description to function comment
 249 // TODO:    NumEntries - add argument and description to function comment
 250 // TODO:    Entries - add argument and description to function comment
 251 // TODO:    EFI_SUCCESS - add return value to function comment
 252 // TODO:    EFI_NOT_FOUND - add return value to function comment
 253 {
 254   EFI_STATUS                    Status;
 255   EFI_PEI_HOB_POINTERS          Hob;
 256   EFI_HOB_FLASH_MAP_ENTRY_TYPE  *FlashMapEntry;
 257
 258   Status = PeiServicesGetHobList (&Hob.Raw);
 259   while (!END_OF_HOB_LIST (Hob)) {
 260     if (Hob.Header->HobType == EFI_HOB_TYPE_GUID_EXTENSION && CompareGuid (&Hob.Guid->Name, &gEfiFlashMapHobGuid)) {
 261       FlashMapEntry = (EFI_HOB_FLASH_MAP_ENTRY_TYPE *) Hob.Raw;
 262       if (AreaType == FlashMapEntry->AreaType) {
 263         if (AreaType == EFI_FLASH_AREA_GUID_DEFINED) {
 264           if (!CompareGuid (AreaTypeGuid, &FlashMapEntry->AreaTypeGuid)) {
 265             continue;
 266           }
 267         }
 268
 269         *NumEntries = FlashMapEntry->NumEntries;
 270         *Entries    = FlashMapEntry->Entries;
 271         return EFI_SUCCESS;
 272       }
 273     }
 274
 275     Hob.Raw = GET_NEXT_HOB (Hob);
 276   }
 277
 278   return EFI_NOT_FOUND;
 279 }