ArmPlatformPkg/PrePeiCore/PrePeiCore.c

   1 /** @file
   2 *  Main file supporting the transition to PEI Core in Normal World for Versatile Express
   3 *
   4 *  Copyright (c) 2011, ARM Limited. All rights reserved.
   5 *
   6 *  This program and the accompanying materials
   7 *  are licensed and made available under the terms and conditions of the BSD License
   8 *  which accompanies this distribution.  The full text of the license may be found at
   9 *  http://opensource.org/licenses/bsd-license.php
  10 *
  11 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 *
  14 **/
  15
  16 #include <Library/BaseLib.h>
  17 #include <Library/DebugAgentLib.h>
  18 #include <Library/PrintLib.h>
  19 #include <Library/ArmLib.h>
  20 #include <Library/SerialPortLib.h>
  21
  22 #include <Ppi/ArmGlobalVariable.h>
  23
  24 #include "PrePeiCore.h"
  25
  26 EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI   mTemporaryRamSupportPpi = { PrePeiCoreTemporaryRamSupport };
  27 ARM_GLOBAL_VARIABLE_PPI             mGlobalVariablePpi = { PrePeiCoreGetGlobalVariableMemory };
  28
  29 EFI_PEI_PPI_DESCRIPTOR      gCommonPpiTable[] = {
  30   {
  31     EFI_PEI_PPI_DESCRIPTOR_PPI,
  32     &gEfiTemporaryRamSupportPpiGuid,
  33     &mTemporaryRamSupportPpi
  34   },
  35   {
  36     EFI_PEI_PPI_DESCRIPTOR_PPI,
  37     &gArmGlobalVariablePpiGuid,
  38     &mGlobalVariablePpi
  39   }
  40 };
  41
  42 VOID
  43 CreatePpiList (
  44   OUT UINTN                   *PpiListSize,
  45   OUT EFI_PEI_PPI_DESCRIPTOR  **PpiList
  46   )
  47 {
  48   EFI_PEI_PPI_DESCRIPTOR *PlatformPpiList;
  49   UINTN                   PlatformPpiListSize;
  50   UINTN                   ListBase;
  51   EFI_PEI_PPI_DESCRIPTOR *LastPpi;
  52
  53   // Get the Platform PPIs
  54   PlatformPpiListSize = 0;
  55   ArmPlatformGetPlatformPpiList (&PlatformPpiListSize, &PlatformPpiList);
  56
  57   // Copy the Common and Platform PPis in Temporrary Memory
  58   ListBase = PcdGet32 (PcdCPUCoresStackBase);
  59   CopyMem ((VOID*)ListBase, gCommonPpiTable, sizeof(gCommonPpiTable));
  60   CopyMem ((VOID*)(ListBase + sizeof(gCommonPpiTable)), PlatformPpiList, PlatformPpiListSize);
  61
  62   // Set the Terminate flag on the last PPI entry
  63   LastPpi = (EFI_PEI_PPI_DESCRIPTOR*)ListBase + ((sizeof(gCommonPpiTable) + PlatformPpiListSize) / sizeof(EFI_PEI_PPI_DESCRIPTOR)) - 1;
  64   LastPpi->Flags |= EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
  65
  66   *PpiList     = (EFI_PEI_PPI_DESCRIPTOR*)ListBase;
  67   *PpiListSize = sizeof(gCommonPpiTable) + PlatformPpiListSize;
  68 }
  69
  70 VOID
  71 CEntryPoint (
  72   IN  UINTN                     MpId,
  73   IN  EFI_PEI_CORE_ENTRY_POINT  PeiCoreEntryPoint
  74   )
  75 {
  76   //Clean Data cache
  77   ArmCleanInvalidateDataCache();
  78
  79   //Invalidate instruction cache
  80   ArmInvalidateInstructionCache();
  81
  82   // Enable Instruction & Data caches
  83   ArmEnableDataCache ();
  84   ArmEnableInstructionCache ();
  85
  86   //
  87   // Note: Doesn't have to Enable CPU interface in non-secure world,
  88   // as Non-secure interface is already enabled in Secure world.
  89   //
  90
  91   // Write VBAR - The Vector table must be 32-byte aligned
  92   ASSERT(((UINT32)PeiVectorTable & ((1 << 5)-1)) == 0);
  93   ArmWriteVBar((UINT32)PeiVectorTable);
  94
  95   //Note: The MMU will be enabled by MemoryPeim. Only the primary core will have the MMU on.
  96
  97   // If not primary Jump to Secondary Main
  98   if (IS_PRIMARY_CORE(MpId)) {
  99     // Initialize the Debug Agent for Source Level Debugging
 100     InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, NULL, NULL);
 101     SaveAndSetDebugTimerInterrupt (TRUE);
 102
 103     // Goto primary Main.
 104     PrimaryMain (PeiCoreEntryPoint);
 105   } else {
 106     SecondaryMain (MpId);
 107   }
 108
 109   // PEI Core should always load and never return
 110   ASSERT (FALSE);
 111 }
 112
 113 EFI_STATUS
 114 EFIAPI
 115 PrePeiCoreTemporaryRamSupport (
 116   IN CONST EFI_PEI_SERVICES   **PeiServices,
 117   IN EFI_PHYSICAL_ADDRESS     TemporaryMemoryBase,
 118   IN EFI_PHYSICAL_ADDRESS     PermanentMemoryBase,
 119   IN UINTN                    CopySize
 120   )
 121 {
 122   VOID                             *OldHeap;
 123   VOID                             *NewHeap;
 124   VOID                             *OldStack;
 125   VOID                             *NewStack;
 126
 127   OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;
 128   NewHeap = (VOID*)((UINTN)PermanentMemoryBase + (CopySize >> 1));
 129
 130   OldStack = (VOID*)((UINTN)TemporaryMemoryBase + (CopySize >> 1));
 131   NewStack = (VOID*)(UINTN)PermanentMemoryBase;
 132
 133   //
 134   // Migrate the temporary memory stack to permanent memory stack.
 135   //
 136   CopyMem (NewStack, OldStack, CopySize >> 1);
 137
 138   //
 139   // Migrate the temporary memory heap to permanent memory heap.
 140   //
 141   CopyMem (NewHeap, OldHeap, CopySize >> 1);
 142
 143   SecSwitchStack ((UINTN)NewStack - (UINTN)OldStack);
 144
 145   return EFI_SUCCESS;
 146 }
 147
 148 EFI_STATUS
 149 PrePeiCoreGetGlobalVariableMemory (
 150   OUT EFI_PHYSICAL_ADDRESS    *GlobalVariableBase
 151   )
 152 {
 153   ASSERT (GlobalVariableBase != NULL);
 154
 155   *GlobalVariableBase = (UINTN)PcdGet32 (PcdCPUCoresStackBase) +
 156                         (UINTN)PcdGet32 (PcdCPUCorePrimaryStackSize) -
 157                         (UINTN)PcdGet32 (PcdPeiGlobalVariableSize);
 158
 159   return EFI_SUCCESS;
 160 }
 161
 162 VOID
 163 PeiCommonExceptionEntry (
 164   IN UINT32 Entry,
 165   IN UINT32 LR
 166   )
 167 {
 168   CHAR8           Buffer[100];
 169   UINTN           CharCount;
 170
 171   switch (Entry) {
 172   case 0:
 173     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reset Exception at 0x%X\n\r",LR);
 174     break;
 175   case 1:
 176     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Undefined Exception at 0x%X\n\r",LR);
 177     break;
 178   case 2:
 179     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"SWI Exception at 0x%X\n\r",LR);
 180     break;
 181   case 3:
 182     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"PrefetchAbort Exception at 0x%X\n\r",LR);
 183     break;
 184   case 4:
 185     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"DataAbort Exception at 0x%X\n\r",LR);
 186     break;
 187   case 5:
 188     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reserved Exception at 0x%X\n\r",LR);
 189     break;
 190   case 6:
 191     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"IRQ Exception at 0x%X\n\r",LR);
 192     break;
 193   case 7:
 194     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"FIQ Exception at 0x%X\n\r",LR);
 195     break;
 196   default:
 197     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Unknown Exception at 0x%X\n\r",LR);
 198     break;
 199   }
 200   SerialPortWrite ((UINT8 *) Buffer, CharCount);
 201   while(1);
 202 }