CorebootModulePkg/SecCore/Ia32/SecEntry.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2015 - 2016, 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 ; Abstract:
  13 ;
  14 ;   Entry point for the coreboot UEFI payload.
  15 ;
  16 ;------------------------------------------------------------------------------
  17
  18 SECTION .text
  19
  20 ; C Functions
  21 extern  ASM_PFX(SecStartup)
  22
  23 ; Pcds
  24 extern  ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))
  25
  26 ;
  27 ; SecCore Entry Point
  28 ;
  29 ; Processor is in flat protected mode
  30 ;
  31 ; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
  32 ; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
  33 ; @param[in]  EBP   Pointer to the start of the Boot Firmware Volume
  34 ;
  35 ; @return     None  This routine does not return
  36 ;
  37 global ASM_PFX(_ModuleEntryPoint)
  38 ASM_PFX(_ModuleEntryPoint):
  39   ;
  40   ; Disable all the interrupts
  41   ;
  42   cli
  43   ;
  44   ; Construct the temporary memory at 0x80000, length 0x10000
  45   ;
  46   mov     esp, (BASE_512KB + SIZE_64KB)
  47
  48   ;
  49   ; Pass BFV into the PEI Core
  50   ;
  51   push    DWORD [ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))]
  52
  53   ;
  54   ; Pass stack base into the PEI Core
  55   ;
  56   push    BASE_512KB
  57
  58   ;
  59   ; Pass stack size into the PEI Core
  60   ;
  61   push    SIZE_64KB
  62
  63   ;
  64   ; Pass Control into the PEI Core
  65   ;
  66   call    ASM_PFX(SecStartup)
  67
  68   ;
  69   ; Should never return
  70   ;
  71   jmp     $
  72