MdeModulePkg/Core/DxeIplPeim/X64/DxeLoadFunc.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   DxeLoadFunc.c
  15
  16 Abstract:
  17
  18   Ia32-specifc functionality for DxeLoad.
  19
  20 --*/
  21
  22 //
  23 // Include common header file for this module.
  24 //
  25 #include "CommonHeader.h"
  26
  27 #include "DxeIpl.h"
  28
  29 VOID
  30 HandOffToDxeCore (
  31   IN EFI_PHYSICAL_ADDRESS   DxeCoreEntryPoint,
  32   IN EFI_PEI_HOB_POINTERS   HobList,
  33   IN EFI_PEI_PPI_DESCRIPTOR *EndOfPeiSignal
  34   )
  35 {
  36   VOID                *BaseOfStack;
  37   VOID                *TopOfStack;
  38   EFI_STATUS          Status;
  39
  40   //
  41   // Allocate 128KB for the Stack
  42   //
  43   BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
  44   ASSERT (BaseOfStack != NULL);
  45
  46   //
  47   // Compute the top of the stack we were allocated. Pre-allocate a UINTN
  48   // for safety.
  49   //
  50   TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
  51   TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
  52
  53   //
  54   // End of PEI phase singal
  55   //
  56   Status = PeiServicesInstallPpi (EndOfPeiSignal);
  57   ASSERT_EFI_ERROR (Status);
  58
  59   SwitchStack (
  60     (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
  61     HobList.Raw,
  62     NULL,
  63     TopOfStack
  64     );
  65 }