EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/EnablePaging64.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006, 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 # Module Name:
  13 #
  14 #   EnablePaging64.S
  15 #
  16 # Abstract:
  17 #
  18 #   AsmEnablePaging64 function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24 #include <EdkIIGlueBase.h>
  25 #------------------------------------------------------------------------------
  26 # VOID
  27 # EFIAPI
  28 # InternalX86EnablePaging64 (
  29 #   IN      UINT16                    Cs,                       %rdi
  30 #   IN      UINT64                    EntryPoint,               %rsi
  31 #   IN      UINT64                    Context1,  OPTIONAL       %rdx
  32 #   IN      UINT64                    Context2,  OPTIONAL       %rcx
  33 #   IN      UINT64                    NewStack                  %r8
  34 #   );
  35 #------------------------------------------------------------------------------
  36 .globl ASM_PFX(InternalX86EnablePaging64)
  37 ASM_PFX(InternalX86EnablePaging64):
  38     cli
  39     pop    %rax
  40     callq  Base
  41 Base:
  42     addl   $(L1-Base),(%rsp)
  43     mov    %cr4,%rax
  44     or     $0x20,%al
  45     mov    %rax,%cr4
  46     mov    $0xc0000080,%ecx
  47     rdmsr
  48     or     $0x1,%ah
  49     wrmsr
  50     mov    %cr0,%rax
  51     bts    $0x1f,%eax
  52     mov    %rax,%cr0
  53     lret
  54 L1:
  55     addr32 mov (%esp),%rbx
  56     addr32 mov 0x8(%esp),%rcx
  57     addr32 mov 0x10(%esp),%rdx
  58     addr32 mov 0x18(%esp),%rsp
  59     add    $-0x20,%rsp
  60     callq  *%rbx
  61     jmp    .