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b1ff428c | 1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
3 | # Copyright (c) 2006 - 2008, Intel Corporation\r | |
4 | # All rights reserved. This program and the accompanying materials\r | |
5 | # are licensed and made available under the terms and conditions of the BSD License\r | |
6 | # which accompanies this distribution. The full text of the license may be found at\r | |
7 | # http://opensource.org/licenses/bsd-license.php\r | |
8 | #\r | |
9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | #\r | |
12 | # Module Name:\r | |
13 | #\r | |
14 | # EnablePaging64.S\r | |
15 | #\r | |
16 | # Abstract:\r | |
17 | #\r | |
18 | # AsmEnablePaging64 function\r | |
19 | #\r | |
20 | # Notes:\r | |
21 | #\r | |
22 | #------------------------------------------------------------------------------\r | |
23 | \r | |
24 | \r | |
25 | #------------------------------------------------------------------------------\r | |
26 | # VOID\r | |
27 | # EFIAPI\r | |
28 | # InternalX86EnablePaging64 (\r | |
29 | # IN UINT16 Cs,\r | |
30 | # IN UINT64 EntryPoint,\r | |
31 | # IN UINT64 Context1, OPTIONAL\r | |
32 | # IN UINT64 Context2, OPTIONAL\r | |
33 | # IN UINT64 NewStack\r | |
34 | # );\r | |
35 | #------------------------------------------------------------------------------\r | |
36 | .global ASM_PFX(InternalX86EnablePaging64)\r | |
37 | ASM_PFX(InternalX86EnablePaging64):\r | |
38 | cli \r | |
39 | pop %rax # skip the return address\r | |
40 | callq Base\r | |
41 | Base:\r | |
42 | addl $(L1-Base),(%rsp) # offset for ret, seg is the 1st arg\r | |
43 | mov %cr4,%rax\r | |
44 | or $0x20,%al\r | |
45 | mov %rax,%cr4 # enable PAE\r | |
46 | mov $0xc0000080,%ecx\r | |
47 | rdmsr \r | |
48 | or $0x1,%ah # set LME\r | |
49 | wrmsr \r | |
50 | mov %cr0,%rax\r | |
51 | bts $0x1f,%eax\r | |
52 | mov %rax,%cr0 # enable paging\r | |
53 | lret \r | |
54 | L1: # long mode starts here\r | |
55 | addr32 mov (%esp),%rbx\r | |
56 | addr32 mov 0x8(%esp),%rcx\r | |
57 | addr32 mov 0x10(%esp),%rdx\r | |
58 | addr32 mov 0x18(%esp),%rsp\r | |
59 | add $-0x20,%rsp\r | |
60 | callq *%rbx\r | |
61 | jmp . # dead loop if EntryPoint() returned\r |