UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / MdeModulePkg / Core / DxeIplPeim / Ebc / DxeLoadFunc.c

/** @file\r
  EBC-specific functionality for DxeLoad.\r
\r
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "DxeIpl.h"\r
\r
/**\r
   Transfers control to DxeCore.\r
\r
   This function performs a CPU architecture specific operations to execute\r
   the entry point of DxeCore with the parameters of HobList.\r
   It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.\r
\r
   @param DxeCoreEntryPoint         The entry point of DxeCore.\r
   @param HobList                   The start of HobList passed to DxeCore.\r
\r
**/\r
VOID\r
HandOffToDxeCore (\r
  IN EFI_PHYSICAL_ADDRESS  DxeCoreEntryPoint,\r
  IN EFI_PEI_HOB_POINTERS  HobList\r
  )\r
{\r
  VOID        *BaseOfStack;\r
  VOID        *TopOfStack;\r
  EFI_STATUS  Status;\r
\r
  //\r
  // Allocate 128KB for the Stack\r
  //\r
  BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));\r
  ASSERT (BaseOfStack != NULL);\r
\r
  //\r
  // Compute the top of the stack we were allocated. Pre-allocate a UINTN\r
  // for safety.\r
  //\r
  TopOfStack = (VOID *)((UINTN)BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);\r
  TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r
\r
  //\r
  // End of PEI phase signal\r
  //\r
  Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r
  //\r
  UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN)BaseOfStack, STACK_SIZE);\r
\r
  //\r
  // Transfer the control to the entry point of DxeCore.\r
  //\r
  SwitchStack (\r
    (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r
    HobList.Raw,\r
    NULL,\r
    TopOfStack\r
    );\r
}\r