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author | raywu <raywu0301@gmail.com> | 2018-06-15 00:00:50 +0800 |
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committer | raywu <raywu0301@gmail.com> | 2018-06-15 00:00:50 +0800 |
commit | b7c51c9cf4864df6aabb99a1ae843becd577237c (patch) | |
tree | eebe9b0d0ca03062955223097e57da84dd618b9a /EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/EnablePaging64.asm | |
download | zprj-b7c51c9cf4864df6aabb99a1ae843becd577237c.tar.xz |
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/EnablePaging64.asm')
-rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/EnablePaging64.asm | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/EnablePaging64.asm b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/EnablePaging64.asm new file mode 100644 index 0000000..97e90c9 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/EnablePaging64.asm @@ -0,0 +1,62 @@ +; Copyright (c) 2004, 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.Asm +; +; Abstract: +; +; AsmEnablePaging64 function +; +; Notes: +; +;------------------------------------------------------------------------------ + + .code + +;------------------------------------------------------------------------------ +; VOID +; EFIAPI +; InternalX86EnablePaging64 ( +; IN UINT16 Cs, +; IN UINT64 EntryPoint, +; IN UINT64 Context1, OPTIONAL +; IN UINT64 Context2, OPTIONAL +; IN UINT64 NewStack +; ); +;------------------------------------------------------------------------------ +InternalX86EnablePaging64 PROC + cli + pop rax + call @Base +@Base: + add dword ptr [rsp], @F - @Base ; offset for far retf, seg is the 1st arg + mov rax, cr4 ; mov eax, cr4 + or al, (1 SHL 5) + mov cr4, rax ; enable PAE + mov ecx, 0c0000080h + rdmsr + or ah, 1 ; set LME + wrmsr + mov rax, cr0 ; mov eax, cr0 + bts eax, 31 + mov cr0, rax ; enable paging + retf +@@: ; long mode starts here + mov rbx, [esp] + mov rcx, [esp + 8] + mov rdx, [esp + 10h] + mov rsp, [esp + 18h] + add rsp, -20h + call rbx + jmp $ ; halt processor if EntryPoint() returned +InternalX86EnablePaging64 ENDP + + END |