1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
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, %rdi
# IN UINT64 EntryPoint, %rsi
# IN UINT64 Context1, OPTIONAL %rdx
# IN UINT32 Context2, OPTIONAL %rcx
# IN UINT64 NewStack %r8
# );
#------------------------------------------------------------------------------
.global ASM_PFX(InternalX86DisablePaging64)
ASM_PFX(InternalX86DisablePaging64):
cli
shl $0x20,%rcx
lea L1, %eax
mov %r8d, %esi
or %rax, %rcx
mov %r9d, %edi
mov 0x28(%rsp), %eax
push %rcx
ret
L1:
mov %eax,%esp
mov %cr0,%rax
btr $0x1f,%eax
mov %rax,%cr0
mov $0xc0000080,%ecx
rdmsr
and $0xfe,%ah
wrmsr
mov %cr4,%rax
and $0xdf,%al
mov %rax,%cr4
push %rdi
push %rsi
callq *%rdx
jmp .
|
