diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/X64/DisablePaging64.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/DisablePaging64.S | 118 |
1 files changed, 59 insertions, 59 deletions
diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.S b/MdePkg/Library/BaseLib/X64/DisablePaging64.S index e4f77970ed..a55059e3be 100644 --- a/MdePkg/Library/BaseLib/X64/DisablePaging64.S +++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.S @@ -1,65 +1,65 @@ -#------------------------------------------------------------------------------ -# -# 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: -# -# DisablePaging64.S -# -# Abstract: -# -# AsmDisablePaging64 function -# -# Notes: -# -#------------------------------------------------------------------------------ - - - -#------------------------------------------------------------------------------ -# VOID -# EFIAPI -# InternalX86DisablePaging64 ( -# IN UINT16 Cs, -# IN UINT64 EntryPoint, -# IN UINT64 Context1, OPTIONAL -# IN UINT32 Context2, OPTIONAL -# IN UINT64 NewStack -# ); -#------------------------------------------------------------------------------ - -.global ASM_PFX(InternalX86DisablePaging64) -ASM_PFX(InternalX86DisablePaging64): - cli - shl $0x20,%rcx # rcx[32..47] <- Cs - lea L1, %eax +#------------------------------------------------------------------------------
+#
+# 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:
+#
+# DisablePaging64.S
+#
+# Abstract:
+#
+# AsmDisablePaging64 function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------
+# VOID
+# EFIAPI
+# InternalX86DisablePaging64 (
+# IN UINT16 Cs,
+# IN UINT64 EntryPoint,
+# IN UINT64 Context1, OPTIONAL
+# IN UINT32 Context2, OPTIONAL
+# IN UINT64 NewStack
+# );
+#------------------------------------------------------------------------------
+
+.global ASM_PFX(InternalX86DisablePaging64)
+ASM_PFX(InternalX86DisablePaging64):
+ cli
+ shl $0x20,%rcx # rcx[32..47] <- Cs
+ lea L1, %eax
mov %r8d, %esi
or %rax, %rcx # rcx[0..47] <- Cs:@F
mov %r9d, %edi
mov 0x28(%rsp), %eax # eax <- New Stack
push %rcx
ret # switch to compatibility mode
-L1: - mov %eax,%esp # set up new stack - mov %cr0,%rax - btr $0x1f,%eax - mov %rax,%cr0 # disable paging - mov $0xc0000080,%ecx - rdmsr - and $0xfe,%ah # clear LME - wrmsr - mov %cr4,%rax - and $0xdf,%al # clear PAE - mov %rax,%cr4 - push %rdi # push Context2 - push %rsi # push Context1 - callq *%rdx # transfer control to EntryPoint - jmp . # no one should get here - +L1:
+ mov %eax,%esp # set up new stack
+ mov %cr0,%rax
+ btr $0x1f,%eax
+ mov %rax,%cr0 # disable paging
+ mov $0xc0000080,%ecx
+ rdmsr
+ and $0xfe,%ah # clear LME
+ wrmsr
+ mov %cr4,%rax
+ and $0xdf,%al # clear PAE
+ mov %rax,%cr4
+ push %rdi # push Context2
+ push %rsi # push Context1
+ callq *%rdx # transfer control to EntryPoint
+ jmp . # no one should get here
+
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