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) 2011-2012, 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/ArmLib.h>
  19
  20 #include <Ppi/ArmGlobalVariable.h>
  21
  22 #include "PrePeiCore.h"
  23
  24 EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI   mTemporaryRamSupportPpi = { PrePeiCoreTemporaryRamSupport };
  25 ARM_GLOBAL_VARIABLE_PPI             mGlobalVariablePpi = { PrePeiCoreGetGlobalVariableMemory };
  26
  27 EFI_PEI_PPI_DESCRIPTOR      gCommonPpiTable[] = {
  28   {
  29     EFI_PEI_PPI_DESCRIPTOR_PPI,
  30     &gEfiTemporaryRamSupportPpiGuid,
  31     &mTemporaryRamSupportPpi
  32   },
  33   {
  34     EFI_PEI_PPI_DESCRIPTOR_PPI,
  35     &gArmGlobalVariablePpiGuid,
  36     &mGlobalVariablePpi
  37   }
  38 };
  39
  40 VOID
  41 CreatePpiList (
  42   OUT UINTN                   *PpiListSize,
  43   OUT EFI_PEI_PPI_DESCRIPTOR  **PpiList
  44   )
  45 {
  46   EFI_PEI_PPI_DESCRIPTOR *PlatformPpiList;
  47   UINTN                   PlatformPpiListSize;
  48   UINTN                   ListBase;
  49   EFI_PEI_PPI_DESCRIPTOR *LastPpi;
  50
  51   // Get the Platform PPIs
  52   PlatformPpiListSize = 0;
  53   ArmPlatformGetPlatformPpiList (&PlatformPpiListSize, &PlatformPpiList);
  54
  55   // Copy the Common and Platform PPis in Temporrary Memory
  56   ListBase = PcdGet32 (PcdCPUCoresStackBase);
  57   CopyMem ((VOID*)ListBase, gCommonPpiTable, sizeof(gCommonPpiTable));
  58   CopyMem ((VOID*)(ListBase + sizeof(gCommonPpiTable)), PlatformPpiList, PlatformPpiListSize);
  59
  60   // Set the Terminate flag on the last PPI entry
  61   LastPpi = (EFI_PEI_PPI_DESCRIPTOR*)ListBase + ((sizeof(gCommonPpiTable) + PlatformPpiListSize) / sizeof(EFI_PEI_PPI_DESCRIPTOR)) - 1;
  62   LastPpi->Flags |= EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
  63
  64   *PpiList     = (EFI_PEI_PPI_DESCRIPTOR*)ListBase;
  65   *PpiListSize = sizeof(gCommonPpiTable) + PlatformPpiListSize;
  66 }
  67
  68 VOID
  69 CEntryPoint (
  70   IN  UINTN                     MpId,
  71   IN  EFI_PEI_CORE_ENTRY_POINT  PeiCoreEntryPoint
  72   )
  73 {
  74   //Clean Data cache
  75   ArmCleanInvalidateDataCache ();
  76
  77   //Invalidate instruction cache
  78   ArmInvalidateInstructionCache ();
  79
  80   // Enable Instruction & Data caches
  81   ArmEnableDataCache ();
  82   ArmEnableInstructionCache ();
  83
  84   //
  85   // Note: Doesn't have to Enable CPU interface in non-secure world,
  86   // as Non-secure interface is already enabled in Secure world.
  87   //
  88
  89   // Write VBAR - The Exception Vector table must be aligned to its requirement
  90   ASSERT (((UINTN)PeiVectorTable & ARM_VECTOR_TABLE_ALIGNMENT) == 0);
  91   ArmWriteVBar ((UINTN)PeiVectorTable);
  92
  93   //Note: The MMU will be enabled by MemoryPeim. Only the primary core will have the MMU on.
  94
  95   // If not primary Jump to Secondary Main
  96   if (ArmPlatformIsPrimaryCore (MpId)) {
  97     // Initialize the Debug Agent for Source Level Debugging
  98     InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, NULL, NULL);
  99     SaveAndSetDebugTimerInterrupt (TRUE);
 100
 101     // Initialize the platform specific controllers
 102     ArmPlatformInitialize (MpId);
 103
 104     // Goto primary Main.
 105     PrimaryMain (PeiCoreEntryPoint);
 106   } else {
 107     SecondaryMain (MpId);
 108   }
 109
 110   // PEI Core should always load and never return
 111   ASSERT (FALSE);
 112 }
 113
 114 EFI_STATUS
 115 EFIAPI
 116 PrePeiCoreTemporaryRamSupport (
 117   IN CONST EFI_PEI_SERVICES   **PeiServices,
 118   IN EFI_PHYSICAL_ADDRESS     TemporaryMemoryBase,
 119   IN EFI_PHYSICAL_ADDRESS     PermanentMemoryBase,
 120   IN UINTN                    CopySize
 121   )
 122 {
 123   VOID                             *OldHeap;
 124   VOID                             *NewHeap;
 125   VOID                             *OldStack;
 126   VOID                             *NewStack;
 127
 128   OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;
 129   NewHeap = (VOID*)((UINTN)PermanentMemoryBase + (CopySize >> 1));
 130
 131   OldStack = (VOID*)((UINTN)TemporaryMemoryBase + (CopySize >> 1));
 132   NewStack = (VOID*)(UINTN)PermanentMemoryBase;
 133
 134   //
 135   // Migrate the temporary memory stack to permanent memory stack.
 136   //
 137   CopyMem (NewStack, OldStack, CopySize >> 1);
 138
 139   //
 140   // Migrate the temporary memory heap to permanent memory heap.
 141   //
 142   CopyMem (NewHeap, OldHeap, CopySize >> 1);
 143
 144   SecSwitchStack ((UINTN)NewStack - (UINTN)OldStack);
 145
 146   return EFI_SUCCESS;
 147 }
 148
 149 EFI_STATUS
 150 PrePeiCoreGetGlobalVariableMemory (
 151   OUT EFI_PHYSICAL_ADDRESS    *GlobalVariableBase
 152   )
 153 {
 154   ASSERT (GlobalVariableBase != NULL);
 155
 156   *GlobalVariableBase = (UINTN)PcdGet32 (PcdCPUCoresStackBase) +
 157                         (UINTN)PcdGet32 (PcdCPUCorePrimaryStackSize) -
 158                         (UINTN)PcdGet32 (PcdPeiGlobalVariableSize);
 159
 160   return EFI_SUCCESS;
 161 }
 162