CorebootModulePkg/SecCore/Ia32/SecEntry.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Module Name:
   7 ;
   8 ;  SecEntry.asm
   9 ;
  10 ; Abstract:
  11 ;
  12 ;  This is the code that begins in protected mode.
  13 ;  It will transfer the control to pei core.
  14 ;
  15 ;------------------------------------------------------------------------------
  16 #include <Base.h>
  17
  18 .686p
  19 .xmm
  20 .model small, c
  21
  22 EXTRN   SecStartup:NEAR
  23
  24 ; Pcds
  25 EXTRN   PcdGet32 (PcdPayloadFdMemBase):DWORD
  26
  27     .code
  28
  29 ;
  30 ; SecCore Entry Point
  31 ;
  32 ; Processor is in flat protected mode
  33 ;
  34 ; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
  35 ; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
  36 ; @param[in]  EBP   Pointer to the start of the Boot Firmware Volume
  37 ;
  38 ; @return     None  This routine does not return
  39 ;
  40
  41 _ModuleEntryPoint   PROC PUBLIC
  42   ;
  43   ; Disable all the interrupts
  44   ;
  45   cli
  46   ;
  47   ; Construct the temporary memory at 0x80000, length 0x10000
  48   ;
  49   mov  esp, (BASE_512KB + SIZE_64KB)
  50
  51   ;
  52   ; Pass BFV into the PEI Core
  53   ;
  54   push    PcdGet32 (PcdPayloadFdMemBase)
  55
  56   ;
  57   ; Pass stack base into the PEI Core
  58   ;
  59   push    BASE_512KB
  60
  61   ;
  62   ; Pass stack size into the PEI Core
  63   ;
  64   push    SIZE_64KB
  65
  66   ;
  67   ; Pass Control into the PEI Core
  68   ;
  69   call SecStartup
  70 _ModuleEntryPoint   ENDP
  71
  72 END