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Make ExectOS only run on processors which support PAE

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This commit is contained in:
Rafal Kupiec
2024-05-24 16:30:39 +02:00
parent 5221db2e63
commit b4588d5b4c
5 changed files with 9 additions and 50 deletions
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29
xtoskrnl/mm/i686/init.c
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@@ -23,27 +23,11 @@ XTAPI
PMMPTE
MmpGetPdeAddress(PVOID Address)
{
ULONG Offset, PdeBase, PdiShift, PteShift;
/* Get PDI and PTE shifts based on memory extension flag */
if(MmpMemoryExtension)
{
/* Get bit shifts for PAE system */
PdeBase = MM_PDE_PAE_BASE;
PdiShift = MM_PDI_PAE_SHIFT;
PteShift = MM_PTE_PAE_SHIFT;
}
else
{
/* Get bit shifts for non-PAE system */
PdeBase = MM_PDE_BASE;
PdiShift = MM_PDI_SHIFT;
PteShift = MM_PTE_SHIFT;
}
ULONG Offset;
/* Calculate offset and return PTE address */
Offset = ((((ULONG)(Address)) >> PdiShift) << PteShift);
return (PMMPTE)(PdeBase + Offset);
Offset = ((((ULONG)(Address)) >> MM_PDI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MM_PDE_BASE + Offset);
}
/**
@@ -60,13 +44,10 @@ XTAPI
PMMPTE
MmpGetPteAddress(PVOID Address)
{
ULONG Offset, PteShift;
/* Get PTE shift based on memory extension flag */
PteShift = MmpMemoryExtension ? MM_PTE_PAE_SHIFT : MM_PTE_SHIFT;
ULONG Offset;
/* Calculate offset and return PTE address */
Offset = ((((ULONG)(Address)) >> MM_PTI_SHIFT) << PteShift);
Offset = ((((ULONG)(Address)) >> MM_PTI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MM_PTE_BASE + Offset);
}