CorebootModulePkg/SecCore/Ia32/SecEntry.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Abstract:
   7 ;
   8 ;   Entry point for the coreboot UEFI payload.
   9 ;
  10 ;------------------------------------------------------------------------------
  11
  12 SECTION .text
  13
  14 ; C Functions
  15 extern  ASM_PFX(SecStartup)
  16
  17 ; Pcds
  18 extern  ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))
  19
  20 ;
  21 ; SecCore Entry Point
  22 ;
  23 ; Processor is in flat protected mode
  24 ;
  25 ; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
  26 ; @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
  27 ; @param[in]  EBP   Pointer to the start of the Boot Firmware Volume
  28 ;
  29 ; @return     None  This routine does not return
  30 ;
  31 global ASM_PFX(_ModuleEntryPoint)
  32 ASM_PFX(_ModuleEntryPoint):
  33   ;
  34   ; Disable all the interrupts
  35   ;
  36   cli
  37   ;
  38   ; Construct the temporary memory at 0x80000, length 0x10000
  39   ;
  40   mov     esp, (BASE_512KB + SIZE_64KB)
  41
  42   ;
  43   ; Pass BFV into the PEI Core
  44   ;
  45   push    DWORD [ASM_PFX(PcdGet32 (PcdPayloadFdMemBase))]
  46
  47   ;
  48   ; Pass stack base into the PEI Core
  49   ;
  50   push    BASE_512KB
  51
  52   ;
  53   ; Pass stack size into the PEI Core
  54   ;
  55   push    SIZE_64KB
  56
  57   ;
  58   ; Pass Control into the PEI Core
  59   ;
  60   call    ASM_PFX(SecStartup)
  61
  62   ;
  63   ; Should never return
  64   ;
  65   jmp     $
  66