OvmfPkg/Sec/Ia32/SecEntry.nasm

   1 ;------------------------------------------------------------------------------
   2 ;*
   3 ;*   Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
   4 ;*   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 ;*    CpuAsm.asm
  13 ;*
  14 ;*   Abstract:
  15 ;*
  16 ;------------------------------------------------------------------------------
  17
  18 #include <Base.h>
  19
  20     SECTION .text
  21
  22 extern ASM_PFX(SecCoreStartupWithStack)
  23
  24 ;
  25 ; SecCore Entry Point
  26 ;
  27 ; Processor is in flat protected mode
  28 ;
  29 ; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
  30 ; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
  31 ; @param[in]  EBP   Pointer to the start of the Boot Firmware Volume
  32 ;
  33 ; @return     None  This routine does not return
  34 ;
  35 global ASM_PFX(_ModuleEntryPoint)
  36 ASM_PFX(_ModuleEntryPoint):
  37
  38     ;
  39     ; Load temporary RAM stack based on PCDs
  40     ;
  41     %define SEC_TOP_OF_STACK (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \
  42                           FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
  43     mov     eax, SEC_TOP_OF_STACK
  44     mov     esp, eax
  45     nop
  46
  47     ;
  48     ; Setup parameters and call SecCoreStartupWithStack
  49     ;   [esp]   return address for call
  50     ;   [esp+4] BootFirmwareVolumePtr
  51     ;   [esp+8] TopOfCurrentStack
  52     ;
  53     push    eax
  54     push    ebp
  55     call    ASM_PFX(SecCoreStartupWithStack)
  56