OvmfPkg/Sec/X64/SecEntry.S

   1 #      TITLE   SecEntry.asm
   2 #------------------------------------------------------------------------------
   3 #*
   4 #*   Copyright (c) 2006 - 2009, 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
  20 #include "SecMain.h"
  21
  22 #EXTERN ASM_PFX(SecCoreStartupWithStack)
  23
  24 #
  25 # SecCore Entry Point
  26 #
  27 # Processor is in flat protected mode
  28 #
  29 # @param[in]  RAX   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]  RBP   Pointer to the start of the Boot Firmware Volume
  32 #
  33 # @return     None  This routine does not return
  34 #
  35 ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
  36 ASM_PFX(_ModuleEntryPoint):
  37
  38     #
  39     # Load temporary stack top at very low memory.  The C code
  40     # can reload to a better address.
  41     #
  42     movq    $INITIAL_TOP_OF_STACK, %rsp
  43     nop
  44
  45     #
  46     # Setup parameters and call SecCoreStartupWithStack
  47     #   rcx: BootFirmwareVolumePtr
  48     #   rdx: TopOfCurrentStack
  49     #
  50     movq    %rbp, %rcx
  51     movq    %rsp, %rdx
  52     subq    $0x20, %rsp
  53     call    ASM_PFX(SecCoreStartupWithStack)
  54