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1.Updated some functions header of BaseLib with new MWG spec

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2.Rollback EnablePaging64.asm

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@669 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff
2006-06-30 08:40:03 +00:00
parent 9040f3054f
commit 30817eb4e4
4 changed files with 182 additions and 142 deletions
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39
MdePkg/Library/BaseLib/Ia32/EnablePaging64.asm
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@@ -26,13 +26,9 @@
.code
InternalX86EnablePaging64 PROC
cli
mov ebx, [esp + 4] ; save CS
mov eax, OFFSET cs_address
mov word ptr [eax], bx ; Update CS selector for far jump
mov eax, cr4
cli
mov [esp], @F ; offset for far retf
mov eax, cr4
or al, (1 SHL 5)
mov cr4, eax ; enable PAE
mov ecx, 0c0000080h
@@ -41,30 +37,19 @@ InternalX86EnablePaging64 PROC
wrmsr
mov eax, cr0
bts eax, 31
mov cr0, eax ; enable paging
retf
jmp go_to_long_mode
go_to_long_mode:
;
; This is the next instruction after enabling paging. Jump to long mode
;
db 067h
db 0eah ; Far Jump Offset:Selector to reload CS
dd OFFSET in_long_mode ; Offset is ensuing instruction boundary
cs_address:
dw 0h ; CS selector will be updated at runtime
in_long_mode: ; now in long mode
mov cr0, eax ; enable paging
retf
@@: ; long mode starts here
DB 67h, 48h
mov ebx, [esp + 8] ; mov rbx, [esp]
DB 67h, 48h
mov ebx, [esp] ; mov rbx, [esp]
DB 67h, 48h
DB 67h, 48h
mov ecx, [esp + 8] ; mov rcx, [esp + 8]
DB 67h, 48h
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