OvmfPkg/ResetVector/JumpToSec.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2008, Intel Corporation
   4 ; All rights reserved. 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 ;   JumpToSec.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   Jump from the reset vector binary to SEC
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22 BITS    32
  23
  24 TransitionFrom16RealTo32FlatComplete:
  25
  26     OneTimeCall Flat32SearchForBfvBase
  27
  28     OneTimeCall Flat32SearchForSecAndPeiEntries
  29
  30     ;
  31     ; ESI - SEC Core entry point
  32     ; EDI - PEI Core entry point
  33     ; EBP - Start of BFV
  34     ;
  35     ; Jump to SEC Core entry point
  36     ;
  37
  38 %ifdef ARCH_IA32
  39
  40     jmp     esi
  41
  42 %else
  43
  44     OneTimeCall Transition32FlatTo64Flat
  45 BITS    64
  46
  47     mov     rax, 0x00000000ffffffff
  48     and     rsi, rax
  49     and     rdi, rax
  50     and     rbp, rax
  51     ;
  52     ; RSI - SEC Core entry point
  53     ; RDI - PEI Core entry point
  54     ; RBP - Start of BFV
  55     ;
  56     ; Jump to SEC Core entry point
  57     ;
  58
  59     jmp     rsi
  60
  61 %endif
  62
  63