OvmfPkg/Sec/X64/SecEntry.asm

   1       TITLE   SecEntry.asm
   2 ;------------------------------------------------------------------------------
   3 ;*
   4 ;*   Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
   5 ;*   This program and the accompanying materials
   6 ;*   are licensed and made available under the terms and conditions of the BSD License
   7 ;*   which accompanies this distribution.  The full text of the license may be found at
   8 ;*   http://opensource.org/licenses/bsd-license.php
   9 ;*
  10 ;*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 ;*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ;*
  13 ;*    CpuAsm.asm
  14 ;*
  15 ;*   Abstract:
  16 ;*
  17 ;------------------------------------------------------------------------------
  18
  19 #include <Base.h>
  20
  21 .code
  22
  23 EXTERN SecCoreStartupWithStack:PROC
  24
  25 ;
  26 ; SecCore Entry Point
  27 ;
  28 ; Processor is in flat protected mode
  29 ;
  30 ; @param[in]  RAX   Initial value of the EAX register (BIST: Built-in Self Test)
  31 ; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
  32 ; @param[in]  RBP   Pointer to the start of the Boot Firmware Volume
  33 ;
  34 ; @return     None  This routine does not return
  35 ;
  36 _ModuleEntryPoint PROC PUBLIC
  37
  38     ;
  39     ; Load temporary RAM stack based on PCDs
  40     ;
  41     SEC_TOP_OF_STACK EQU (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \
  42                           FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
  43     mov     rsp, SEC_TOP_OF_STACK
  44     nop
  45
  46     ;
  47     ; Setup parameters and call SecCoreStartupWithStack
  48     ;   rcx: BootFirmwareVolumePtr
  49     ;   rdx: TopOfCurrentStack
  50     ;
  51     mov     rcx, rbp
  52     mov     rdx, rsp
  53     sub     rsp, 20h
  54     call    SecCoreStartupWithStack
  55
  56 _ModuleEntryPoint ENDP
  57
  58 END