CorebootModulePkg/SecCore/Ia32/SecEntry.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 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 ; Module Name:
  13 ;
  14 ;  SecEntry.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;  This is the code that begins in protected mode.
  19 ;  It will transfer the control to pei core.
  20 ;
  21 ;------------------------------------------------------------------------------
  22 #include <Base.h>
  23
  24 .686p
  25 .xmm
  26 .model small, c
  27
  28 EXTRN   SecStartup:NEAR
  29
  30 ; Pcds
  31 EXTRN   PcdGet32 (PcdPayloadFdMemBase):DWORD
  32
  33     .code
  34
  35 ;
  36 ; SecCore Entry Point
  37 ;
  38 ; Processor is in flat protected mode
  39 ;
  40 ; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
  41 ; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
  42 ; @param[in]  EBP   Pointer to the start of the Boot Firmware Volume
  43 ;
  44 ; @return     None  This routine does not return
  45 ;
  46
  47 _ModuleEntryPoint   PROC PUBLIC
  48   ;
  49   ; Disable all the interrupts
  50   ;
  51   cli
  52   ;
  53   ; Construct the temporary memory at 0x80000, length 0x10000
  54   ;
  55   mov  esp, (BASE_512KB + SIZE_64KB)
  56
  57   ;
  58   ; Pass BFV into the PEI Core
  59   ;
  60   push    PcdGet32 (PcdPayloadFdMemBase)
  61
  62   ;
  63   ; Pass stack base into the PEI Core
  64   ;
  65   push    BASE_512KB
  66
  67   ;
  68   ; Pass stack size into the PEI Core
  69   ;
  70   push    SIZE_64KB
  71
  72   ;
  73   ; Pass Control into the PEI Core
  74   ;
  75   call SecStartup
  76 _ModuleEntryPoint   ENDP
  77
  78 END