audk/CorebootModulePkg/SecCore/Ia32/SecEntry.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution.  The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php.
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
# Module Name:
#
#  SecEntry.S
#
# Abstract:
#
#  This is the code that begins in protected mode.
#   It will transfer the control to pei core.
#
#------------------------------------------------------------------------------

ASM_GLOBAL  ASM_PFX(SecStartup)

# Pcds
ASM_GLOBAL  ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))

#
# SecCore Entry Point
#
# Processor is in flat protected mode
#
# @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
# @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
# @param[in]  EBP   Pointer to the start of the Boot Firmware Volume
#
# @return     None  This routine does not return
#
ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
ASM_PFX(_ModuleEntryPoint):
  #
  # Disable all the interrupts
  #
  cli
  
  #
  # Construct the temporary memory at 0x80000, length 0x10000
  #
  movl $(BASE_512KB + SIZE_64KB), %esp

  #
  # Pass BFV into the PEI Core
  #
  pushl ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))
  
  #
  # Pass stack base into the PEI Core
  #
  pushl $BASE_512KB

  #
  # Pass stack size into the PEI Core
  #
  pushl $SIZE_64KB

  #
  # Pass Control into the PEI Core
  #
  call SecStartup
  
  #
  # Never return to here
  #
  jmp .