diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/EnablePaging64.asm')
-rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/EnablePaging64.asm | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/EnablePaging64.asm b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/EnablePaging64.asm new file mode 100644 index 0000000..ce30372 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/EnablePaging64.asm @@ -0,0 +1,66 @@ +; 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: +; +;------------------------------------------------------------------------------ + + .686p + .model flat,C + .code + +;------------------------------------------------------------------------------ +; VOID +; EFIAPI +; InternalX86EnablePaging64 ( +; IN UINT16 Cs, +; IN UINT64 EntryPoint, +; IN UINT64 Context1, OPTIONAL +; IN UINT64 Context2, OPTIONAL +; IN UINT64 NewStack +; ); +;------------------------------------------------------------------------------ +InternalX86EnablePaging64 PROC + cli + mov [esp], @F ; offset for far retf, seg is the 1st arg + mov eax, cr4 + or al, (1 SHL 5) + mov cr4, eax ; enable PAE + mov ecx, 0c0000080h + rdmsr + or ah, 1 ; set LME + wrmsr + mov eax, cr0 + bts eax, 31 + mov cr0, eax ; enable paging + retf +@@: ; long mode starts here + DB 67h, 48h + mov ebx, [esp] ; mov rbx, [esp] + DB 67h, 48h + mov ecx, [esp + 8] ; mov rcx, [esp + 8] + DB 67h, 48h + mov edx, [esp + 10h] ; mov rdx, [esp + 10h] + DB 67h, 48h + mov esp, [esp + 18h] ; mov rsp, [esp + 18h] + DB 48h + add esp, -20h ; add rsp, -20h + call ebx ; call rbx + jmp $ +InternalX86EnablePaging64 ENDP + + END |