MdeModulePkg/Core/Pei/PeiMain/PeiMain.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   PeiMain.c
  15
  16 Abstract:
  17
  18   Pei Core Main Entry Point
  19
  20 Revision History
  21
  22 --*/
  23
  24 #include <PeiMain.h>
  25
  26 //
  27 //CAR is filled with this initial value during SEC phase
  28 //
  29 #define INIT_CAR_VALUE 0x5AA55AA5
  30
  31 static EFI_PEI_PPI_DESCRIPTOR mMemoryDiscoveredPpi = {
  32   (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
  33   &gEfiPeiMemoryDiscoveredPpiGuid,
  34   NULL
  35 };
  36
  37 //
  38 // Pei Core Module Variables
  39 //
  40 //
  41 static EFI_PEI_SERVICES  mPS = {
  42   {
  43     PEI_SERVICES_SIGNATURE,
  44     PEI_SERVICES_REVISION,
  45     sizeof (EFI_PEI_SERVICES),
  46     0,
  47     0
  48   },
  49   PeiInstallPpi,
  50   PeiReInstallPpi,
  51   PeiLocatePpi,
  52   PeiNotifyPpi,
  53
  54   PeiGetBootMode,
  55   PeiSetBootMode,
  56
  57   PeiGetHobList,
  58   PeiCreateHob,
  59
  60   PeiFvFindNextVolume,
  61   PeiFfsFindNextFile,
  62   PeiFfsFindSectionData,
  63
  64   PeiInstallPeiMemory,
  65   PeiAllocatePages,
  66   PeiAllocatePool,
  67   (EFI_PEI_COPY_MEM)CopyMem,
  68   (EFI_PEI_SET_MEM)SetMem,
  69
  70   PeiReportStatusCode,
  71   PeiResetSystem,
  72
  73   NULL,
  74   NULL,
  75
  76   PeiFfsFindFileByName,
  77   PeiFfsGetFileInfo,
  78   PeiFfsGetVolumeInfo,
  79   PeiRegisterForShadow
  80 };
  81
  82 EFI_STATUS
  83 EFIAPI
  84 PeiCore (
  85   IN CONST EFI_SEC_PEI_HAND_OFF        *SecCoreData,
  86   IN CONST EFI_PEI_PPI_DESCRIPTOR      *PpiList,
  87   IN VOID                              *Data
  88   )
  89 /*++
  90
  91 Routine Description:
  92
  93   The entry routine to Pei Core, invoked by PeiMain during transition
  94   from SEC to PEI. After switching stack in the PEI core, it will restart
  95   with the old core data.
  96
  97 Arguments:
  98
  99   SecCoreData          - Points to a data structure containing information about the PEI core's operating
 100                          environment, such as the size and location of temporary RAM, the stack location and
 101                          the BFV location.
 102   PpiList              - Points to a list of one or more PPI descriptors to be installed initially by the PEI core.
 103                          An empty PPI list consists of a single descriptor with the end-tag
 104                          EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST. As part of its initialization
 105                          phase, the PEI Foundation will add these SEC-hosted PPIs to its PPI database such
 106                          that both the PEI Foundation and any modules can leverage the associated service
 107                          calls and/or code in these early PPIs
 108   Data                 - Pointer to old core data that is used to initialize the
 109                          core's data areas.
 110
 111 Returns:
 112
 113   This function never returns
 114   EFI_NOT_FOUND        - Never reach
 115
 116 --*/
 117 {
 118   PEI_CORE_INSTANCE                                     PrivateData;
 119   EFI_STATUS                                            Status;
 120   PEI_CORE_TEMP_POINTERS                                TempPtr;
 121   UINT64                                                mTick;
 122   PEI_CORE_INSTANCE                                     *OldCoreData;
 123   EFI_PEI_CPU_IO_PPI                                    *CpuIo;
 124   EFI_PEI_PCI_CFG2_PPI                                  *PciCfg;
 125   PEI_CORE_ENTRY_POINT                                  ShadowedPeiCore;
 126
 127   mTick = 0;
 128   OldCoreData = (PEI_CORE_INSTANCE *) Data;
 129
 130   if (PerformanceMeasurementEnabled()) {
 131     if (OldCoreData == NULL) {
 132       mTick = GetPerformanceCounter ();
 133     }
 134   }
 135
 136   if (OldCoreData != NULL) {
 137     ShadowedPeiCore = (PEI_CORE_ENTRY_POINT) (UINTN) OldCoreData->ShadowedPeiCore;
 138     if (ShadowedPeiCore != NULL) {
 139       OldCoreData->ShadowedPeiCore = NULL;
 140       ShadowedPeiCore (
 141         SecCoreData,
 142         PpiList,
 143         OldCoreData
 144         );
 145     }
 146
 147     CopyMem (&PrivateData, OldCoreData, sizeof (PEI_CORE_INSTANCE));
 148
 149     CpuIo = (VOID*)PrivateData.ServiceTableShadow.CpuIo;
 150     PciCfg = (VOID*)PrivateData.ServiceTableShadow.PciCfg;
 151
 152     CopyMem (&PrivateData.ServiceTableShadow, &mPS, sizeof (mPS));
 153
 154     PrivateData.ServiceTableShadow.CpuIo  = CpuIo;
 155     PrivateData.ServiceTableShadow.PciCfg = PciCfg;
 156   } else {
 157     ZeroMem (&PrivateData, sizeof (PEI_CORE_INSTANCE));
 158     PrivateData.Signature = PEI_CORE_HANDLE_SIGNATURE;
 159     CopyMem (&PrivateData.ServiceTableShadow, &mPS, sizeof (mPS));
 160   }
 161
 162   PrivateData.PS = &PrivateData.ServiceTableShadow;
 163
 164   //
 165   // Initialize libraries that the PeiCore is linked against
 166   // BUGBUG: The FileHandle is passed in as NULL.  Do we look it up or remove it from the lib init?
 167   //
 168   ProcessLibraryConstructorList (NULL, &PrivateData.PS);
 169
 170   InitializeMemoryServices (&PrivateData, SecCoreData, OldCoreData);
 171
 172   InitializePpiServices (&PrivateData, OldCoreData);
 173
 174   //
 175   // Save PeiServicePointer so that it can be retrieved anywhere.
 176   //
 177   SetPeiServicesTablePointer(&PrivateData.PS);
 178
 179   if (OldCoreData != NULL) {
 180
 181     PERF_END (NULL,"PreMem", NULL, 0);
 182     PERF_START (NULL,"PostMem", NULL, 0);
 183
 184     //
 185     // The following code dumps out interesting cache as RAM usage information
 186     // so we can keep tabs on how the cache as RAM is being utilized.  The
 187     // DEBUG_CODE_BEGIN macro is used to prevent this code from being compiled
 188     // on a debug build.
 189     //
 190     DEBUG_CODE_BEGIN ();
 191       UINTN  *StackPointer;
 192       UINTN  StackValue;
 193
 194       StackValue = INIT_CAR_VALUE;
 195       for (StackPointer = (UINTN *) OldCoreData->MaxTopOfCarHeap;
 196            ((UINTN) StackPointer < ((UINTN) OldCoreData->BottomOfCarHeap + OldCoreData->SizeOfCacheAsRam))
 197            && StackValue == INIT_CAR_VALUE;
 198            StackPointer++) {
 199         StackValue = *StackPointer;
 200       }
 201
 202       DEBUG ((EFI_D_INFO, "Total Cache as RAM:    %d bytes.\n", OldCoreData->SizeOfCacheAsRam));
 203       DEBUG ((EFI_D_INFO, "  CAR stack ever used: %d bytes.\n",
 204         ((UINTN) OldCoreData->TopOfCarHeap - (UINTN) StackPointer)
 205         ));
 206       DEBUG ((EFI_D_INFO, "  CAR heap used:       %d bytes.\n",
 207         ((UINTN) OldCoreData->HobList.HandoffInformationTable->EfiFreeMemoryBottom -
 208         (UINTN) OldCoreData->HobList.Raw)
 209         ));
 210     DEBUG_CODE_END ();
 211
 212     //
 213     // Alert any listeners that there is permanent memory available
 214     //
 215
 216     PERF_START (NULL,"DisMem", NULL, 0);
 217     Status = PeiServicesInstallPpi (&mMemoryDiscoveredPpi);
 218     PERF_END (NULL,"DisMem", NULL, 0);
 219
 220   } else {
 221
 222     //
 223     // Report Status Code EFI_SW_PC_INIT
 224     //
 225     REPORT_STATUS_CODE (
 226       EFI_PROGRESS_CODE,
 227       FixedPcdGet32 (PcdStatusCodeValuePeiCoreEntry)
 228       );
 229
 230     PERF_START (NULL,"PEI", NULL, mTick);
 231     //
 232     // If first pass, start performance measurement.
 233     //
 234     PERF_START (NULL,"PreMem", NULL, mTick);
 235
 236     //
 237     // If SEC provided any PPI services to PEI, install them.
 238     //
 239     if (PpiList != NULL) {
 240       Status = PeiServicesInstallPpi (PpiList);
 241       ASSERT_EFI_ERROR (Status);
 242     }
 243   }
 244
 245   InitializeSecurityServices (&PrivateData.PS, OldCoreData);
 246
 247   InitializeDispatcherData (&PrivateData, OldCoreData, SecCoreData);
 248
 249   //
 250   // Install Pei Load File PPI.
 251   //
 252   InitializeImageServices (&PrivateData, OldCoreData);
 253
 254   //
 255   // Call PEIM dispatcher
 256   //
 257   PeiDispatcher (SecCoreData, &PrivateData);
 258
 259   //
 260   // Check if InstallPeiMemory service was called.
 261   //
 262   ASSERT(PrivateData.PeiMemoryInstalled == TRUE);
 263
 264   PERF_END (NULL, "PostMem", NULL, 0);
 265
 266   Status = PeiServicesLocatePpi (
 267              &gEfiDxeIplPpiGuid,
 268              0,
 269              NULL,
 270              (VOID **)&TempPtr.DxeIpl
 271              );
 272   ASSERT_EFI_ERROR (Status);
 273
 274   DEBUG ((EFI_D_INFO, "DXE IPL Entry\n"));
 275   Status = TempPtr.DxeIpl->Entry (
 276                              TempPtr.DxeIpl,
 277                              &PrivateData.PS,
 278                              PrivateData.HobList
 279                              );
 280
 281   ASSERT_EFI_ERROR (Status);
 282
 283   return EFI_NOT_FOUND;
 284 }
 285
 286