UefiCpuPkg/CpuDxe/Ia32/CpuAsm.asm

   1       TITLE   CpuAsm.asm:
   2 ;------------------------------------------------------------------------------
   3 ;*
   4 ;*   Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
   5 ;*   This program and the accompanying materials
   6 ;*   are licensed and made available under the terms and conditions of the BSD License
   7 ;*   which accompanies this distribution.  The full text of the license may be found at
   8 ;*   http://opensource.org/licenses/bsd-license.php
   9 ;*
  10 ;*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 ;*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ;*
  13 ;*    CpuAsm.asm
  14 ;*
  15 ;*   Abstract:
  16 ;*
  17 ;------------------------------------------------------------------------------
  18
  19     .686
  20     .model  flat,C
  21     .code
  22
  23 ;------------------------------------------------------------------------------
  24 ; VOID
  25 ; SetCodeSelector (
  26 ;   UINT16 Selector
  27 ;   );
  28 ;------------------------------------------------------------------------------
  29 SetCodeSelector PROC PUBLIC
  30     mov     ecx, [esp+4]
  31     sub     esp, 0x10
  32     lea     eax, setCodeSelectorLongJump
  33     mov     [esp], eax
  34     mov     [esp+4], cx
  35     jmp     fword ptr [esp]
  36 setCodeSelectorLongJump:
  37     add     esp, 0x10
  38     ret
  39 SetCodeSelector ENDP
  40
  41 ;------------------------------------------------------------------------------
  42 ; VOID
  43 ; SetDataSelectors (
  44 ;   UINT16 Selector
  45 ;   );
  46 ;------------------------------------------------------------------------------
  47 SetDataSelectors PROC PUBLIC
  48     mov     ecx, [esp+4]
  49     mov     ss, cx
  50     mov     ds, cx
  51     mov     es, cx
  52     mov     fs, cx
  53     mov     gs, cx
  54     ret
  55 SetDataSelectors ENDP
  56
  57
  58 END