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
 126   mTick = 0;
 127   OldCoreData = (PEI_CORE_INSTANCE *) Data;
 128
 129   if (PerformanceMeasurementEnabled()) {
 130     if (OldCoreData == NULL) {
 131       mTick = GetPerformanceCounter ();
 132     }
 133   }
 134
 135   if (OldCoreData != NULL) {
 136     CopyMem (&PrivateData, OldCoreData, sizeof (PEI_CORE_INSTANCE));
 137
 138     CpuIo = (VOID*)PrivateData.ServiceTableShadow.CpuIo;
 139     PciCfg = (VOID*)PrivateData.ServiceTableShadow.PciCfg;
 140
 141     CopyMem (&PrivateData.ServiceTableShadow, &mPS, sizeof (mPS));
 142
 143     PrivateData.ServiceTableShadow.CpuIo  = CpuIo;
 144     PrivateData.ServiceTableShadow.PciCfg = PciCfg;
 145   } else {
 146     ZeroMem (&PrivateData, sizeof (PEI_CORE_INSTANCE));
 147     PrivateData.Signature = PEI_CORE_HANDLE_SIGNATURE;
 148     CopyMem (&PrivateData.ServiceTableShadow, &mPS, sizeof (mPS));
 149   }
 150
 151   PrivateData.PS = &PrivateData.ServiceTableShadow;
 152
 153   //
 154   // Initialize libraries that the PeiCore is linked against
 155   // BUGBUG: The FileHandle is passed in as NULL.  Do we look it up or remove it from the lib init?
 156   //
 157   ProcessLibraryConstructorList (NULL, &PrivateData.PS);
 158
 159   InitializeMemoryServices (&PrivateData, SecCoreData, OldCoreData);
 160
 161   InitializePpiServices (&PrivateData, OldCoreData);
 162
 163   //
 164   // Save PeiServicePointer so that it can be retrieved anywhere.
 165   //
 166   SetPeiServicesTablePointer(&PrivateData.PS);
 167
 168   if (OldCoreData != NULL) {
 169
 170     PERF_END (NULL,"PreMem", NULL, 0);
 171     PERF_START (NULL,"PostMem", NULL, 0);
 172
 173     //
 174     // The following code dumps out interesting cache as RAM usage information
 175     // so we can keep tabs on how the cache as RAM is being utilized.  The
 176     // DEBUG_CODE_BEGIN macro is used to prevent this code from being compiled
 177     // on a debug build.
 178     //
 179     DEBUG_CODE_BEGIN ();
 180       UINTN  *StackPointer;
 181       UINTN  StackValue;
 182
 183       StackValue = INIT_CAR_VALUE;
 184       for (StackPointer = (UINTN *) OldCoreData->TopOfCarHeap;
 185            ((UINTN) StackPointer < ((UINTN) OldCoreData->MaxTopOfCarHeap))
 186            && StackValue == INIT_CAR_VALUE;
 187            StackPointer++) {
 188         StackValue = *StackPointer;
 189       }
 190
 191       DEBUG ((EFI_D_INFO, "Total Cache as RAM:    %d bytes.\n", OldCoreData->SizeOfCacheAsRam));
 192       DEBUG ((EFI_D_INFO, "  CAR stack ever used: %d bytes.\n",
 193         ((UINTN) OldCoreData->MaxTopOfCarHeap - (UINTN) StackPointer)
 194         ));
 195       DEBUG ((EFI_D_INFO, "  CAR heap used:       %d bytes.\n",
 196         ((UINTN) OldCoreData->HobList.HandoffInformationTable->EfiFreeMemoryBottom -
 197         (UINTN) OldCoreData->HobList.Raw)
 198         ));
 199     DEBUG_CODE_END ();
 200
 201     //
 202     // Alert any listeners that there is permanent memory available
 203     //
 204
 205     PERF_START (NULL,"DisMem", NULL, 0);
 206     Status = PeiServicesInstallPpi (&mMemoryDiscoveredPpi);
 207     PERF_END (NULL,"DisMem", NULL, 0);
 208
 209   } else {
 210
 211     //
 212     // Report Status Code EFI_SW_PC_INIT
 213     //
 214     REPORT_STATUS_CODE (
 215       EFI_PROGRESS_CODE,
 216       FixedPcdGet32 (PcdStatusCodeValuePeiCoreEntry)
 217       );
 218
 219     PERF_START (NULL,"PEI", NULL, mTick);
 220     //
 221     // If first pass, start performance measurement.
 222     //
 223     PERF_START (NULL,"PreMem", NULL, mTick);
 224
 225     //
 226     // If SEC provided any PPI services to PEI, install them.
 227     //
 228     if (PpiList != NULL) {
 229       Status = PeiServicesInstallPpi (PpiList);
 230       ASSERT_EFI_ERROR (Status);
 231     }
 232   }
 233
 234   InitializeSecurityServices (&PrivateData.PS, OldCoreData);
 235
 236   InitializeDispatcherData (&PrivateData, OldCoreData, SecCoreData);
 237
 238   //
 239   // Install Pei Load File PPI.
 240   //
 241   InitializeImageServices (&PrivateData, OldCoreData);
 242
 243   //
 244   // Call PEIM dispatcher
 245   //
 246   PeiDispatcher (SecCoreData, &PrivateData);
 247
 248   //
 249   // Check if InstallPeiMemory service was called.
 250   //
 251   ASSERT(PrivateData.PeiMemoryInstalled == TRUE);
 252
 253   PERF_END (NULL, "PostMem", NULL, 0);
 254
 255   Status = PeiServicesLocatePpi (
 256              &gEfiDxeIplPpiGuid,
 257              0,
 258              NULL,
 259              (VOID **)&TempPtr.DxeIpl
 260              );
 261   ASSERT_EFI_ERROR (Status);
 262
 263   DEBUG ((EFI_D_INFO, "DXE IPL Entry\n"));
 264   Status = TempPtr.DxeIpl->Entry (
 265                              TempPtr.DxeIpl,
 266                              &PrivateData.PS,
 267                              PrivateData.HobList
 268                              );
 269
 270   ASSERT_EFI_ERROR (Status);
 271
 272   return EFI_NOT_FOUND;
 273 }
 274
 275