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f1baef62 | 1 | #------------------------------------------------------------------------------ |
2 | # | |
c2049caa | 3 | # Copyright (c) 2006 - 2008, Intel Corporation |
f1baef62 | 4 | # All rights reserved. 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 | # DisablePaging64.S | |
15 | # | |
16 | # Abstract: | |
17 | # | |
18 | # AsmDisablePaging64 function | |
19 | # | |
20 | # Notes: | |
21 | # | |
22 | #------------------------------------------------------------------------------ | |
23 | ||
24 | ||
25 | ||
26 | #------------------------------------------------------------------------------ | |
27 | # VOID | |
28 | # EFIAPI | |
29 | # InternalX86DisablePaging64 ( | |
30 | # IN UINT16 Cs, %rdi | |
31 | # IN UINT64 EntryPoint, %rsi | |
32 | # IN UINT64 Context1, OPTIONAL %rdx | |
33 | # IN UINT32 Context2, OPTIONAL %rcx | |
34 | # IN UINT64 NewStack %r8 | |
35 | # ); | |
36 | #------------------------------------------------------------------------------ | |
37 | ||
85c25283 | 38 | .global ASM_PFX(InternalX86DisablePaging64) |
39 | ASM_PFX(InternalX86DisablePaging64): | |
f1baef62 | 40 | cli |
41 | shl $0x20,%rcx | |
c2049caa | 42 | lea L1, %eax |
43 | mov %r8d, %esi \r | |
44 | or %rax, %rcx\r | |
45 | mov %r9d, %edi \r | |
46 | mov 0x28(%rsp), %eax\r | |
47 | push %rcx\r | |
48 | ret\r | |
f1baef62 | 49 | L1: |
50 | mov %eax,%esp | |
51 | mov %cr0,%rax | |
52 | btr $0x1f,%eax | |
53 | mov %rax,%cr0 | |
54 | mov $0xc0000080,%ecx | |
55 | rdmsr | |
56 | and $0xfe,%ah | |
57 | wrmsr | |
58 | mov %cr4,%rax | |
59 | and $0xdf,%al | |
60 | mov %rax,%cr4 | |
61 | push %rdi | |
62 | push %rsi | |
c2049caa | 63 | callq *%rdx |
f1baef62 | 64 | jmp . |
65 |