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Do not hardcode PML shift values

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This commit is contained in:
Rafal Kupiec
2024-05-27 22:26:05 +02:00
parent f968eb21fd
commit 6b1ccc4ce5
3 changed files with 10 additions and 9 deletions
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6
xtldr/arch/i686/memory.c
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@@ -260,10 +260,10 @@ BlpSelfMapPml(IN PXTBL_PAGE_MAPPING PageMap,
if(PageMap->PageMapLevel == 3)
{
/* Calculate PML index based on provided self map address */
PmlIndex = (SelfMapAddress >> 21) & 0x1FF;
PmlIndex = (SelfMapAddress >> MM_PDI_SHIFT) & 0x1FF;
/* Get Page Directory */
Pml = (PHARDWARE_PTE)(((PHARDWARE_PTE)PageMap->PtePointer)[SelfMapAddress >> 30].PageFrameNumber * EFI_PAGE_SIZE);
Pml = (PHARDWARE_PTE)(((PHARDWARE_PTE)PageMap->PtePointer)[SelfMapAddress >> MM_PPI_SHIFT].PageFrameNumber * EFI_PAGE_SIZE);
/* Add self-mapping for PML3 (PAE enabled) */
for(Index = 0; Index < 4; Index++)
@@ -276,7 +276,7 @@ BlpSelfMapPml(IN PXTBL_PAGE_MAPPING PageMap,
else
{
/* Calculate PML index based on provided self map address */
PmlIndex = (SelfMapAddress >> 22);
PmlIndex = (SelfMapAddress >> MM_PDI_LEGACY_SHIFT);
/* Add self-mapping for PML2 (PAE disabled) */
((PHARDWARE_LEGACY_PTE)PageMap->PtePointer)[PmlIndex].PageFrameNumber = (UINT_PTR)PageMap->PtePointer / EFI_PAGE_SIZE;