EdkModulePkg/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
  72   PeiResetSystem
  73 };
  74
  75 EFI_STATUS
  76 EFIAPI
  77 PeiCore (
  78   IN EFI_PEI_STARTUP_DESCRIPTOR  *PeiStartupDescriptor,
  79   IN PEI_CORE_INSTANCE           *OldCoreData
  80   )
  81 /*++
  82
  83 Routine Description:
  84
  85   The entry routine to Pei Core, invoked by PeiMain during transition
  86   from SEC to PEI. After switching stack in the PEI core, it will restart
  87   with the old core data.
  88
  89 Arguments:
  90
  91   PeiStartupDescriptor - Information and services provided by SEC phase.
  92   OldCoreData          - Pointer to old core data that is used to initialize the
  93                          core's data areas.
  94
  95 Returns:
  96
  97   This function never returns
  98   EFI_NOT_FOUND        - Never reach
  99
 100 --*/
 101 {
 102   PEI_CORE_INSTANCE                                     PrivateData;
 103   EFI_STATUS                                            Status;
 104   PEI_CORE_TEMP_POINTERS                                TempPtr;
 105   PEI_CORE_DISPATCH_DATA                                *DispatchData;
 106   UINT64                                                mTick;
 107
 108   mTick = 0;
 109
 110   if (PerformanceMeasurementEnabled()) {
 111     if (OldCoreData == NULL) {
 112       mTick = GetPerformanceCounter ();
 113     }
 114   }
 115
 116   //
 117   // For IPF in CAR mode the real memory access is uncached,in InstallPeiMemory()
 118   //  the 63-bit of address is set to 1.
 119   //
 120   SWITCH_TO_CACHE_MODE (OldCoreData);
 121
 122   if (OldCoreData != NULL) {
 123     CopyMem (&PrivateData, OldCoreData, sizeof (PEI_CORE_INSTANCE));
 124   } else {
 125     ZeroMem (&PrivateData, sizeof (PEI_CORE_INSTANCE));
 126   }
 127
 128   PrivateData.Signature = PEI_CORE_HANDLE_SIGNATURE;
 129   PrivateData.PS = &mPS;
 130
 131   //
 132   // Initialize libraries that the PeiCore is linked against
 133   // BUGBUG: The FfsHeader is passed in as NULL.  Do we look it up or remove it from the lib init?
 134   //
 135   ProcessLibraryConstructorList (NULL, &PrivateData.PS);
 136
 137   InitializeMemoryServices (&PrivateData.PS, PeiStartupDescriptor, OldCoreData);
 138
 139   InitializePpiServices (&PrivateData.PS, OldCoreData);
 140
 141   InitializeSecurityServices (&PrivateData.PS, OldCoreData);
 142
 143   InitializeDispatcherData (&PrivateData.PS, OldCoreData, PeiStartupDescriptor);
 144
 145   if (OldCoreData != NULL) {
 146
 147     PERF_END (NULL,"PreMem", NULL, 0);
 148     PERF_START (NULL,"PostMem", NULL, 0);
 149
 150     //
 151     // The following code dumps out interesting cache as RAM usage information
 152     // so we can keep tabs on how the cache as RAM is being utilized.  The
 153     // DEBUG_CODE_BEGIN macro is used to prevent this code from being compiled
 154     // on a debug build.
 155     //
 156     DEBUG_CODE_BEGIN ();
 157       UINTN  *StackPointer;
 158       UINTN  StackValue;
 159
 160       StackValue = INIT_CAR_VALUE;
 161       for (StackPointer = (UINTN *) OldCoreData->MaxTopOfCarHeap;
 162            ((UINTN) StackPointer < ((UINTN) OldCoreData->BottomOfCarHeap + OldCoreData->SizeOfCacheAsRam))
 163            && StackValue == INIT_CAR_VALUE;
 164            StackPointer++) {
 165         StackValue = *StackPointer;
 166       }
 167
 168       DEBUG ((EFI_D_INFO, "Total Cache as RAM:    %d bytes.\n", OldCoreData->SizeOfCacheAsRam));
 169       DEBUG ((EFI_D_INFO, "  CAR stack ever used: %d bytes.\n",
 170         ((UINTN) OldCoreData->TopOfCarHeap - (UINTN) StackPointer)
 171         ));
 172       DEBUG ((EFI_D_INFO, "  CAR heap used:       %d bytes.\n",
 173         ((UINTN) OldCoreData->HobList.HandoffInformationTable->EfiFreeMemoryBottom -
 174         (UINTN) OldCoreData->HobList.Raw)
 175         ));
 176     DEBUG_CODE_END ();
 177
 178     //
 179     // Alert any listeners that there is permanent memory available
 180     //
 181
 182     PERF_START (NULL,"DisMem", NULL, 0);
 183     Status = PeiServicesInstallPpi (&mMemoryDiscoveredPpi);
 184     PERF_END (NULL,"DisMem", NULL, 0);
 185
 186   } else {
 187
 188     //
 189     // Report Status Code EFI_SW_PC_INIT
 190     //
 191     REPORT_STATUS_CODE (
 192       EFI_PROGRESS_CODE,
 193       EFI_SOFTWARE_PEI_CORE | EFI_SW_PC_INIT
 194       );
 195
 196     PERF_START (NULL,"PEI", NULL, mTick);
 197     //
 198     // If first pass, start performance measurement.
 199     //
 200     PERF_START (NULL,"PreMem", NULL, mTick);
 201
 202     //
 203     // If SEC provided any PPI services to PEI, install them.
 204     //
 205     if (PeiStartupDescriptor->DispatchTable != NULL) {
 206       Status = PeiServicesInstallPpi (PeiStartupDescriptor->DispatchTable);
 207       ASSERT_EFI_ERROR (Status);
 208     }
 209   }
 210
 211   DispatchData = &PrivateData.DispatchData;
 212
 213   //
 214   // Call PEIM dispatcher
 215   //
 216   PeiDispatcher (PeiStartupDescriptor, &PrivateData, DispatchData);
 217
 218   //
 219   // Check if InstallPeiMemory service was called.
 220   //
 221   ASSERT(PrivateData.PeiMemoryInstalled == TRUE);
 222
 223   PERF_END (NULL, "PostMem", NULL, 0);
 224
 225   Status = PeiServicesLocatePpi (
 226              &gEfiDxeIplPpiGuid,
 227              0,
 228              NULL,
 229              (VOID **)&TempPtr.DxeIpl
 230              );
 231   ASSERT_EFI_ERROR (Status);
 232
 233   DEBUG ((EFI_D_INFO, "DXE IPL Entry\n"));
 234   Status = TempPtr.DxeIpl->Entry (
 235                              TempPtr.DxeIpl,
 236                              &PrivateData.PS,
 237                              PrivateData.HobList
 238                              );
 239
 240   ASSERT_EFI_ERROR (Status);
 241
 242   return EFI_NOT_FOUND;
 243 }
 244