diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/X64/EnablePaging64.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/EnablePaging64.S | 122 |
1 files changed, 61 insertions, 61 deletions
diff --git a/MdePkg/Library/BaseLib/X64/EnablePaging64.S b/MdePkg/Library/BaseLib/X64/EnablePaging64.S index 6a66aba3f7..82c6eb75b4 100644 --- a/MdePkg/Library/BaseLib/X64/EnablePaging64.S +++ b/MdePkg/Library/BaseLib/X64/EnablePaging64.S @@ -1,61 +1,61 @@ -#------------------------------------------------------------------------------ -# -# Copyright (c) 2006 - 2008, Intel Corporation -# All rights reserved. This program and the accompanying materials -# are licensed and made available under the terms and conditions of the BSD License -# which accompanies this distribution. The full text of the license may be found at -# http://opensource.org/licenses/bsd-license.php -# -# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, -# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. -# -# Module Name: -# -# EnablePaging64.S -# -# Abstract: -# -# AsmEnablePaging64 function -# -# Notes: -# -#------------------------------------------------------------------------------ - - -#------------------------------------------------------------------------------ -# VOID -# EFIAPI -# InternalX86EnablePaging64 ( -# IN UINT16 Cs, -# IN UINT64 EntryPoint, -# IN UINT64 Context1, OPTIONAL -# IN UINT64 Context2, OPTIONAL -# IN UINT64 NewStack -# ); -#------------------------------------------------------------------------------ -.global ASM_PFX(InternalX86EnablePaging64) -ASM_PFX(InternalX86EnablePaging64): - cli - pop %rax # skip the return address - callq Base -Base: - addl $(L1-Base),(%rsp) # offset for ret, seg is the 1st arg - mov %cr4,%rax - or $0x20,%al - mov %rax,%cr4 # enable PAE - mov $0xc0000080,%ecx - rdmsr - or $0x1,%ah # set LME - wrmsr - mov %cr0,%rax - bts $0x1f,%eax - mov %rax,%cr0 # enable paging - lret -L1: # long mode starts here - addr32 mov (%esp),%rbx - addr32 mov 0x8(%esp),%rcx - addr32 mov 0x10(%esp),%rdx - addr32 mov 0x18(%esp),%rsp - add $-0x20,%rsp - callq *%rbx - jmp . # dead loop if EntryPoint() returned +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2008, Intel Corporation
+# All rights reserved. This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+# EnablePaging64.S
+#
+# Abstract:
+#
+# AsmEnablePaging64 function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------
+# VOID
+# EFIAPI
+# InternalX86EnablePaging64 (
+# IN UINT16 Cs,
+# IN UINT64 EntryPoint,
+# IN UINT64 Context1, OPTIONAL
+# IN UINT64 Context2, OPTIONAL
+# IN UINT64 NewStack
+# );
+#------------------------------------------------------------------------------
+.global ASM_PFX(InternalX86EnablePaging64)
+ASM_PFX(InternalX86EnablePaging64):
+ cli
+ pop %rax # skip the return address
+ callq Base
+Base:
+ addl $(L1-Base),(%rsp) # offset for ret, seg is the 1st arg
+ mov %cr4,%rax
+ or $0x20,%al
+ mov %rax,%cr4 # enable PAE
+ mov $0xc0000080,%ecx
+ rdmsr
+ or $0x1,%ah # set LME
+ wrmsr
+ mov %cr0,%rax
+ bts $0x1f,%eax
+ mov %rax,%cr0 # enable paging
+ lret
+L1: # long mode starts here
+ addr32 mov (%esp),%rbx
+ addr32 mov 0x8(%esp),%rcx
+ addr32 mov 0x10(%esp),%rdx
+ addr32 mov 0x18(%esp),%rsp
+ add $-0x20,%rsp
+ callq *%rbx
+ jmp . # dead loop if EntryPoint() returned
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