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Select correct self-map base for PAE and non-PAE paging
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This commit is contained in:
Aiken Harris
2025-12-22 10:14:11 +01:00
parent e237a944cc
commit 6aa148784b
1 changed files with 14 additions and 1 deletions
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15
boot/xtldr/modules/xtos_o/i686/memory.cc
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@@ -59,9 +59,22 @@ EFI_STATUS
Xtos::EnablePaging(IN PXTBL_PAGE_MAPPING PageMap)
{
EFI_STATUS Status;
ULONG_PTR SelfMapAddress;
/* Initialize self map address */
if(PageMap->PageMapLevel == 3)
{
/* For PML3 (PAE) use PTE base address */
SelfMapAddress = MM_PTE_BASE;
}
else
{
/* For PML2 (PAE disabled) use legacy PDE base address */
SelfMapAddress = MM_PDE_LEGACY_BASE;
}
/* Build page map */
Status = XtLdrProtocol->Memory.BuildPageMap(PageMap, MM_PTE_BASE);
Status = XtLdrProtocol->Memory.BuildPageMap(PageMap, SelfMapAddress);
if(Status != STATUS_EFI_SUCCESS)
{
/* Failed to build page map */