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[NTOS]: Implement MiRemoveZeroPage and MiZeroPhysicalPage.

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svn path=/trunk/; revision=47621
This commit is contained in:
Sir Richard 2010-06-06 14:12:28 +00:00
parent 08b2876a25
commit 49448736a2
1 changed files with 87 additions and 0 deletions
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87
reactos/ntoskrnl/mm/ARM3/pfnlist.c
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@ -56,6 +56,20 @@ PMMPFNLIST MmPageLocationList[] =
};
/* FUNCTIONS ******************************************************************/
VOID
NTAPI
MiZeroPhysicalPage(IN PFN_NUMBER PageFrameIndex)
{
KIRQL OldIrql;
PVOID VirtualAddress;
PEPROCESS Process = PsGetCurrentProcess();
/* Map in hyperspace, then wipe it using XMMI or MEMSET */
VirtualAddress = MiMapPageInHyperSpace(Process, PageFrameIndex, &OldIrql);
KeZeroPages(VirtualAddress, PAGE_SIZE);
MiUnmapPageInHyperSpace(Process, VirtualAddress, OldIrql);
}
VOID
NTAPI
MiInsertInListTail(IN PMMPFNLIST ListHead,
@ -441,6 +455,79 @@ MiRemoveAnyPage(IN ULONG Color)
return PageIndex;
}
PFN_NUMBER
NTAPI
MiRemoveZeroPage(IN ULONG Color)
{
PFN_NUMBER PageIndex;
PMMPFN Pfn1;
BOOLEAN Zero;
/* Make sure PFN lock is held and we have pages */
ASSERT(KeGetCurrentIrql() == DISPATCH_LEVEL);
ASSERT(MmAvailablePages != 0);
ASSERT(Color < MmSecondaryColors);
/* Check the colored zero list */
#if 0 // Enable when using ARM3 database */
PageIndex = MmFreePagesByColor[ZeroedPageList][Color].Flink;
if (PageIndex == LIST_HEAD)
{
#endif
/* Check the zero list */
ASSERT_LIST_INVARIANT(&MmZeroedPageListHead);
PageIndex = MmZeroedPageListHead.Flink;
Color = PageIndex & MmSecondaryColorMask;
if (PageIndex == LIST_HEAD)
{
ASSERT(MmZeroedPageListHead.Total == 0);
Zero = TRUE;
#if 0 // Enable when using ARM3 database */
/* Check the colored free list */
PageIndex = MmFreePagesByColor[ZeroedPageList][Color].Flink;
if (PageIndex == LIST_HEAD)
{
#endif
/* Check the free list */
ASSERT_LIST_INVARIANT(&MmFreePageListHead);
PageIndex = MmFreePageListHead.Flink;
Color = PageIndex & MmSecondaryColorMask;
ASSERT(PageIndex != LIST_HEAD);
if (PageIndex == LIST_HEAD)
{
/* FIXME: Should check the standby list */
ASSERT(MmZeroedPageListHead.Total == 0);
}
#if 0 // Enable when using ARM3 database */
}
#endif
}
#if 0 // Enable when using ARM3 database */
}
#endif
/* Sanity checks */
Pfn1 = MiGetPfnEntry(PageIndex);
ASSERT((Pfn1->u3.e1.PageLocation == FreePageList) ||
(Pfn1->u3.e1.PageLocation == ZeroedPageList));
/* Remove the page from its list */
PageIndex = MiRemovePageByColor(PageIndex, Color);
ASSERT(Pfn1 == MiGetPfnEntry(PageIndex));
/* Zero it, if needed */
if (Zero) MiZeroPhysicalPage(PageIndex);
/* Sanity checks */
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
ASSERT(Pfn1->u2.ShareCount == 0);
ASSERT_LIST_INVARIANT(&MmFreePageListHead);
ASSERT_LIST_INVARIANT(&MmZeroedPageListHead);
/* Return the page */
return PageIndex;
}
PMMPFN
NTAPI
MiRemoveHeadList(IN PMMPFNLIST ListHead)