OvmfPkg/Sec/X64/SecEntry.asm

   1       TITLE   SecEntry.asm
   2 ;------------------------------------------------------------------------------
   3 ;*
   4 ;*   Copyright 2006 - 2009, Intel Corporation
   5 ;*   All rights reserved. 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 "SecMain.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  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 _ModuleEntryPoint PROC PUBLIC
  38
  39     ;
  40     ; Load temporary stack top at very low memory.  The C code
  41     ; can reload to a better address.
  42     ;
  43     mov     rsp, INITIAL_TOP_OF_STACK
  44     nop
  45
  46     ;
  47     ; Setup parameters and call SecCoreStartupWithStack
  48     ;   rcx: BootFirmwareVolumePtr
  49     ;   rdx: SecCoreEntryPoint
  50     ;   r8:  PeiCoreEntryPoint
  51     ;   r9:  TopOfCurrentStack
  52     ;
  53     mov     rcx, rbp
  54     mov     rdx, rsi
  55     mov     r8, rdi
  56     mov     r9, rsp
  57     call    SecCoreStartupWithStack
  58
  59 _ModuleEntryPoint ENDP
  60
  61 END