OvmfPkg/Sec/X64/SecEntry.S

   1 #      TITLE   SecEntry.asm
   2
   3 #------------------------------------------------------------------------------
   4 #*
   5 #*   Copyright 2006 - 2009, Intel Corporation
   6 #*   All rights reserved. This program and the accompanying materials
   7 #*   are licensed and made available under the terms and conditions of the BSD License
   8 #*   which accompanies this distribution.  The full text of the license may be found at
   9 #*   http://opensource.org/licenses/bsd-license.php
  10 #*
  11 #*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 #*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 #*
  14 #*    CpuAsm.asm
  15 #*
  16 #*   Abstract:
  17 #*
  18 #------------------------------------------------------------------------------
  19
  20
  21 #include "SecMain.h"
  22
  23 #EXTERN ASM_PFX(SecCoreStartupWithStack)
  24
  25 #
  26 #  SecCore Entry Point
  27 #
  28 #  Processor is in flat protected mode
  29 #
  30 #  @param  ESI  Pointer to SEC Core Entry Point (this function)
  31 #  @param  EDI  Pointer to PEI Core Entry Point
  32 #  @param  EBP  Pointer to the start of the Boot Firmware Volume
  33 #
  34 #  @return None
  35 #
  36 #
  37 .intel_syntax
  38 ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
  39 ASM_PFX(_ModuleEntryPoint):
  40
  41     #
  42     # Load temporary stack top at very low memory.  The C code
  43     # can reload to a better address.
  44     #
  45     mov     %rsp, INITIAL_TOP_OF_STACK
  46     nop
  47
  48     #
  49     # Setup parameters and call SecCoreStartupWithStack
  50     #   rcx: BootFirmwareVolumePtr
  51     #   rdx: SecCoreEntryPoint
  52     #   r8:  PeiCoreEntryPoint
  53     #   r9:  TopOfCurrentStack
  54     #
  55     mov     %rcx, %rbp
  56     mov     %rdx, %rsi
  57     mov     %r8, %rdi
  58     mov     %r9, %rsp
  59     call    ASM_PFX(SecCoreStartupWithStack)
  60