ArmRealViewEbPkg/SecForPei/Sec.c

   1 /** @file
   2   C Entry point for the SEC. First C code after the reset vector.
   3
   4   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   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 <PiPei.h>
  17 #include <Ppi/TemporaryRamSupport.h>
  18 #include <Library/PcdLib.h>
  19 #include <Library/IoLib.h>
  20 #include <Library/BaseLib.h>
  21 #include <Library/BaseMemoryLib.h>
  22 #include <ArmEb/ArmEb.h>
  23
  24 EFI_STATUS
  25 EFIAPI
  26 SecTemporaryRamSupport (
  27   IN CONST EFI_PEI_SERVICES   **PeiServices,
  28   IN EFI_PHYSICAL_ADDRESS     TemporaryMemoryBase,
  29   IN EFI_PHYSICAL_ADDRESS     PermanentMemoryBase,
  30   IN UINTN                    CopySize
  31   );
  32
  33 VOID
  34 SecSwitchStack (
  35   INTN    StackDelta
  36   );
  37
  38 TEMPORARY_RAM_SUPPORT_PPI   mSecTemporaryRamSupportPpi = {SecTemporaryRamSupport};
  39
  40 EFI_PEI_PPI_DESCRIPTOR      gSecPpiTable[] = {
  41   {
  42     EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
  43     &gEfiTemporaryRamSupportPpiGuid,
  44     &mSecTemporaryRamSupportPpi
  45   }
  46 };
  47
  48
  49 VOID
  50 EFIAPI
  51 _ModuleEntryPoint(
  52   VOID
  53   );
  54
  55 VOID
  56 CEntryPoint (
  57   IN  UINTN                     TempRamBase,
  58   IN  UINTN                     TempRamSize,
  59   IN  EFI_PEI_CORE_ENTRY_POINT  PeiCoreEntryPoint
  60   )
  61 {
  62   EFI_SEC_PEI_HAND_OFF        SecCoreData;
  63
  64   // Turn off remapping NOR to 0. We can will now see DRAM in low memory (although it is not yet initialized)
  65   // note: this makes SEC platform-specific for the EB platform
  66   MmioOr32 (0x10001000 ,BIT8); //EB_SP810_CTRL_BASE
  67
  68   //
  69   // Bind this information into the SEC hand-off state
  70   // Note: this must be in sync with the stuff in the asm file
  71   // Note also:  HOBs (pei temp ram) MUST be above stack
  72   //
  73   SecCoreData.DataSize               = sizeof(EFI_SEC_PEI_HAND_OFF);
  74   SecCoreData.BootFirmwareVolumeBase = (VOID *)(UINTN)PcdGet32 (PcdEmbeddedFdBaseAddress);
  75   SecCoreData.BootFirmwareVolumeSize = PcdGet32 (PcdEmbeddedFdSize);
  76   SecCoreData.TemporaryRamBase       = (VOID*)(UINTN)TempRamBase;
  77   SecCoreData.TemporaryRamSize       = TempRamSize;
  78   SecCoreData.PeiTemporaryRamBase    = (VOID *)(UINTN)(SecCoreData.TemporaryRamBase + (SecCoreData.TemporaryRamSize / 2));
  79   SecCoreData.PeiTemporaryRamSize    = SecCoreData.TemporaryRamSize / 2;
  80   SecCoreData.StackBase              = (VOID *)(UINTN)(SecCoreData.TemporaryRamBase);
  81   SecCoreData.StackSize              = SecCoreData.TemporaryRamSize - SecCoreData.PeiTemporaryRamSize;
  82
  83   // jump to pei core entry point
  84   (PeiCoreEntryPoint)(&SecCoreData, (VOID *)&gSecPpiTable);
  85 }
  86
  87 EFI_STATUS
  88 EFIAPI
  89 SecTemporaryRamSupport (
  90   IN CONST EFI_PEI_SERVICES   **PeiServices,
  91   IN EFI_PHYSICAL_ADDRESS     TemporaryMemoryBase,
  92   IN EFI_PHYSICAL_ADDRESS     PermanentMemoryBase,
  93   IN UINTN                    CopySize
  94   )
  95 {
  96   //
  97   // Migrate the whole temporary memory to permenent memory.
  98   //
  99   CopyMem (
 100     (VOID*)(UINTN)PermanentMemoryBase,
 101     (VOID*)(UINTN)TemporaryMemoryBase,
 102     CopySize
 103     );
 104
 105   SecSwitchStack((UINTN)(PermanentMemoryBase - TemporaryMemoryBase));
 106
 107   //
 108   // We need *not* fix the return address because currently,
 109   // The PeiCore is excuted in flash.
 110   //
 111
 112   //
 113   // Simulate to invalid temporary memory, terminate temporary memory
 114   //
 115   //ZeroMem ((VOID*)(UINTN)TemporaryMemoryBase, CopySize);
 116
 117   return EFI_SUCCESS;
 118 }
 119