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reactos/ntoskrnl/mm/ARM3/pfnlist.c

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/*
* PROJECT: ReactOS Kernel
* LICENSE: BSD - See COPYING.ARM in the top level directory
* FILE: ntoskrnl/mm/ARM3/pfnlist.c
* PURPOSE: ARM Memory Manager PFN List Manipulation
* PROGRAMMERS: ReactOS Portable Systems Group
*/
/* INCLUDES *******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
#define MODULE_INVOLVED_IN_ARM3
#include <mm/ARM3/miarm.h>
#if DBG
#define ASSERT_LIST_INVARIANT(x) \
do { \
ASSERT(((x)->Total == 0 && \
(x)->Flink == LIST_HEAD && \
(x)->Blink == LIST_HEAD) || \
((x)->Total != 0 && \
(x)->Flink != LIST_HEAD && \
(x)->Blink != LIST_HEAD)); \
} while (0)
#else
#define ASSERT_LIST_INVARIANT(x)
#endif
/* GLOBALS ********************************************************************/
BOOLEAN MmDynamicPfn;
BOOLEAN MmMirroring;
ULONG MmSystemPageColor;
ULONG MmTransitionSharedPages;
ULONG MmTotalPagesForPagingFile;
MMPFNLIST MmZeroedPageListHead = {0, ZeroedPageList, LIST_HEAD, LIST_HEAD};
MMPFNLIST MmFreePageListHead = {0, FreePageList, LIST_HEAD, LIST_HEAD};
MMPFNLIST MmStandbyPageListHead = {0, StandbyPageList, LIST_HEAD, LIST_HEAD};
MMPFNLIST MmStandbyPageListByPriority[8];
MMPFNLIST MmModifiedPageListHead = {0, ModifiedPageList, LIST_HEAD, LIST_HEAD};
MMPFNLIST MmModifiedPageListByColor[1] = {{0, ModifiedPageList, LIST_HEAD, LIST_HEAD}};
MMPFNLIST MmModifiedNoWritePageListHead = {0, ModifiedNoWritePageList, LIST_HEAD, LIST_HEAD};
MMPFNLIST MmBadPageListHead = {0, BadPageList, LIST_HEAD, LIST_HEAD};
MMPFNLIST MmRomPageListHead = {0, StandbyPageList, LIST_HEAD, LIST_HEAD};
PMMPFNLIST MmPageLocationList[] =
{
&MmZeroedPageListHead,
&MmFreePageListHead,
&MmStandbyPageListHead,
&MmModifiedPageListHead,
&MmModifiedNoWritePageListHead,
&MmBadPageListHead,
NULL,
NULL
};
ULONG MI_PFN_CURRENT_USAGE;
CHAR MI_PFN_CURRENT_PROCESS_NAME[16] = "None yet";
/* FUNCTIONS ******************************************************************/
static
VOID
MiIncrementAvailablePages(
VOID)
{
/* Increment available pages */
MmAvailablePages++;
/* Check if we've reached the configured low memory threshold */
if (MmAvailablePages == MmLowMemoryThreshold)
{
/* Clear the event, because now we're ABOVE the threshold */
KeClearEvent(MiLowMemoryEvent);
}
else if (MmAvailablePages == MmHighMemoryThreshold)
{
/* Otherwise check if we reached the high threshold and signal the event */
KeSetEvent(MiHighMemoryEvent, 0, FALSE);
}
}
static
VOID
MiDecrementAvailablePages(
VOID)
{
ASSERT(MmAvailablePages > 0);
/* See if we hit any thresholds */
if (MmAvailablePages == MmHighMemoryThreshold)
{
/* Clear the high memory event */
KeClearEvent(MiHighMemoryEvent);
}
else if (MmAvailablePages == MmLowMemoryThreshold)
{
/* Signal the low memory event */
KeSetEvent(MiLowMemoryEvent, 0, FALSE);
}
/* One less page */
MmAvailablePages--;
if (MmAvailablePages < MmMinimumFreePages)
{
/* FIXME: Should wake up the MPW and working set manager, if we had one */
DPRINT1("Running low on pages: %lu remaining\n", MmAvailablePages);
/* Call RosMm and see if it can release any pages for us */
MmRebalanceMemoryConsumers();
}
}
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);
ASSERT(VirtualAddress);
KeZeroPages(VirtualAddress, PAGE_SIZE);
MiUnmapPageInHyperSpace(Process, VirtualAddress, OldIrql);
}
VOID
NTAPI
MiUnlinkFreeOrZeroedPage(IN PMMPFN Entry)
{
PFN_NUMBER OldFlink, OldBlink;
PMMPFNLIST ListHead;
MMLISTS ListName;
ULONG Color;
PMMCOLOR_TABLES ColorTable;
PMMPFN Pfn1;
/* Make sure the PFN lock is held */
MI_ASSERT_PFN_LOCK_HELD();
/* Make sure the PFN entry isn't in-use */
ASSERT(Entry->u3.e1.WriteInProgress == 0);
ASSERT(Entry->u3.e1.ReadInProgress == 0);
/* Find the list for this entry, make sure it's the free or zero list */
ListHead = MmPageLocationList[Entry->u3.e1.PageLocation];
ListName = ListHead->ListName;
ASSERT(ListHead != NULL);
ASSERT(ListName <= FreePageList);
ASSERT_LIST_INVARIANT(ListHead);
/* Remove one count */
ASSERT(ListHead->Total != 0);
ListHead->Total--;
/* Get the forward and back pointers */
OldFlink = Entry->u1.Flink;
OldBlink = Entry->u2.Blink;
/* Check if the next entry is the list head */
if (OldFlink != LIST_HEAD)
{
/* It is not, so set the backlink of the actual entry, to our backlink */
MI_PFN_ELEMENT(OldFlink)->u2.Blink = OldBlink;
}
else
{
/* Set the list head's backlink instead */
ListHead->Blink = OldBlink;
}
/* Check if the back entry is the list head */
if (OldBlink != LIST_HEAD)
{
/* It is not, so set the backlink of the actual entry, to our backlink */
MI_PFN_ELEMENT(OldBlink)->u1.Flink = OldFlink;
}
else
{
/* Set the list head's backlink instead */
ListHead->Flink = OldFlink;
}
/* Get the page color */
OldBlink = MiGetPfnEntryIndex(Entry);
Color = OldBlink & MmSecondaryColorMask;
/* Get the first page on the color list */
ColorTable = &MmFreePagesByColor[ListName][Color];
/* Check if this was was actually the head */
OldFlink = ColorTable->Flink;
if (OldFlink == OldBlink)
{
/* Make the table point to the next page this page was linking to */
ColorTable->Flink = Entry->OriginalPte.u.Long;
if (ColorTable->Flink != LIST_HEAD)
{
/* And make the previous link point to the head now */
MI_PFN_ELEMENT(ColorTable->Flink)->u4.PteFrame = COLORED_LIST_HEAD;
}
else
{
/* And if that page was the head, loop the list back around */
ColorTable->Blink = (PVOID)LIST_HEAD;
}
}
else
{
/* This page shouldn't be pointing back to the head */
ASSERT(Entry->u4.PteFrame != COLORED_LIST_HEAD);
/* Make the back link point to whoever the next page is */
Pfn1 = MI_PFN_ELEMENT(Entry->u4.PteFrame);
Pfn1->OriginalPte.u.Long = Entry->OriginalPte.u.Long;
/* Check if this page was pointing to the head */
if (Entry->OriginalPte.u.Long != LIST_HEAD)
{
/* Make the back link point to the head */
Pfn1 = MI_PFN_ELEMENT(Entry->OriginalPte.u.Long);
Pfn1->u4.PteFrame = Entry->u4.PteFrame;
}
else
{
/* Then the table is directly back pointing to this page now */
ColorTable->Blink = Pfn1;
}
}
/* One less colored page */
ASSERT(ColorTable->Count >= 1);
ColorTable->Count--;
/* ReactOS Hack */
Entry->OriginalPte.u.Long = 0;
/* We are not on a list anymore */
Entry->u1.Flink = Entry->u2.Blink = 0;
ASSERT_LIST_INVARIANT(ListHead);
/* Decrement number of available pages */
MiDecrementAvailablePages();
#if MI_TRACE_PFNS
ASSERT(MI_PFN_CURRENT_USAGE != MI_USAGE_NOT_SET);
Entry->PfnUsage = MI_PFN_CURRENT_USAGE;
memcpy(Entry->ProcessName, MI_PFN_CURRENT_PROCESS_NAME, 16);
Entry->CallSite = _ReturnAddress();
MI_PFN_CURRENT_USAGE = MI_USAGE_NOT_SET;
MI_SET_PROCESS2("Not Set");
#endif
}
VOID
NTAPI
MiUnlinkPageFromList(IN PMMPFN Pfn)
{
PMMPFNLIST ListHead;
PFN_NUMBER OldFlink, OldBlink;
/* Make sure the PFN lock is held */
MI_ASSERT_PFN_LOCK_HELD();
/* ARM3 should only call this for dead pages */
ASSERT(Pfn->u3.e2.ReferenceCount == 0);
/* Transition pages are supposed to be standby/modified/nowrite */
ListHead = MmPageLocationList[Pfn->u3.e1.PageLocation];
ASSERT(ListHead->ListName >= StandbyPageList);
/* Check if this was standby, or modified */
if (ListHead == &MmStandbyPageListHead)
{
/* Should not be a ROM page */
ASSERT(Pfn->u3.e1.Rom == 0);
/* Get the exact list */
ListHead = &MmStandbyPageListByPriority[Pfn->u4.Priority];
/* Decrement number of available pages */
MiDecrementAvailablePages();
/* Decrease transition page counter */
ASSERT(Pfn->u3.e1.PrototypePte == 1); /* Only supported ARM3 case */
MmTransitionSharedPages--;
}
else if (ListHead == &MmModifiedPageListHead)
{
/* Only shared memory (page-file backed) modified pages are supported */
ASSERT(Pfn->OriginalPte.u.Soft.Prototype == 0);
/* Decrement the counters */
ListHead->Total--;
MmTotalPagesForPagingFile--;
/* Pick the correct colored list */
ListHead = &MmModifiedPageListByColor[0];
/* Decrease transition page counter */
MmTransitionSharedPages--;
}
else if (ListHead == &MmModifiedNoWritePageListHead)
{
/* List not yet supported */
ASSERT(FALSE);
}
/* Nothing should be in progress and the list should not be empty */
ASSERT(Pfn->u3.e1.WriteInProgress == 0);
ASSERT(Pfn->u3.e1.ReadInProgress == 0);
ASSERT(ListHead->Total != 0);
/* Get the forward and back pointers */
OldFlink = Pfn->u1.Flink;
OldBlink = Pfn->u2.Blink;
/* Check if the next entry is the list head */
if (OldFlink != LIST_HEAD)
{
/* It is not, so set the backlink of the actual entry, to our backlink */
MI_PFN_ELEMENT(OldFlink)->u2.Blink = OldBlink;
}
else
{
/* Set the list head's backlink instead */
ListHead->Blink = OldBlink;
}
/* Check if the back entry is the list head */
if (OldBlink != LIST_HEAD)
{
/* It is not, so set the backlink of the actual entry, to our backlink */
MI_PFN_ELEMENT(OldBlink)->u1.Flink = OldFlink;
}
else
{
/* Set the list head's backlink instead */
ListHead->Flink = OldFlink;
}
/* ReactOS Hack */
Pfn->OriginalPte.u.Long = 0;
/* We are not on a list anymore */
Pfn->u1.Flink = Pfn->u2.Blink = 0;
/* Remove one entry from the list */
ListHead->Total--;
ASSERT_LIST_INVARIANT(ListHead);
}
PFN_NUMBER
NTAPI
MiRemovePageByColor(IN PFN_NUMBER PageIndex,
IN ULONG Color)
{
PMMPFN Pfn1;
PMMPFNLIST ListHead;
MMLISTS ListName;
PFN_NUMBER OldFlink, OldBlink;
USHORT OldColor, OldCache;
PMMCOLOR_TABLES ColorTable;
/* Make sure PFN lock is held */
MI_ASSERT_PFN_LOCK_HELD();
ASSERT(Color < MmSecondaryColors);
/* Get the PFN entry */
Pfn1 = MI_PFN_ELEMENT(PageIndex);
ASSERT(Pfn1->u3.e1.RemovalRequested == 0);
ASSERT(Pfn1->u3.e1.Rom == 0);
/* Capture data for later */
OldColor = Pfn1->u3.e1.PageColor;
OldCache = Pfn1->u3.e1.CacheAttribute;
/* Could be either on free or zero list */
ListHead = MmPageLocationList[Pfn1->u3.e1.PageLocation];
ASSERT_LIST_INVARIANT(ListHead);
ListName = ListHead->ListName;
ASSERT(ListName <= FreePageList);
/* Remove a page */
ListHead->Total--;
/* Get the forward and back pointers */
OldFlink = Pfn1->u1.Flink;
OldBlink = Pfn1->u2.Blink;
/* Check if the next entry is the list head */
if (OldFlink != LIST_HEAD)
{
/* It is not, so set the backlink of the actual entry, to our backlink */
MI_PFN_ELEMENT(OldFlink)->u2.Blink = OldBlink;
}
else
{
/* Set the list head's backlink instead */
ListHead->Blink = OldBlink;
}
/* Check if the back entry is the list head */
if (OldBlink != LIST_HEAD)
{
/* It is not, so set the backlink of the actual entry, to our backlink */
MI_PFN_ELEMENT(OldBlink)->u1.Flink = OldFlink;
}
else
{
/* Set the list head's backlink instead */
ListHead->Flink = OldFlink;
}
/* We are not on a list anymore */
ASSERT_LIST_INVARIANT(ListHead);
Pfn1->u1.Flink = Pfn1->u2.Blink = 0;
/* Zero flags but restore color and cache */
Pfn1->u3.e2.ShortFlags = 0;
Pfn1->u3.e1.PageColor = OldColor;
Pfn1->u3.e1.CacheAttribute = OldCache;
/* Get the first page on the color list */
ASSERT(Color < MmSecondaryColors);
ColorTable = &MmFreePagesByColor[ListName][Color];
ASSERT(ColorTable->Count >= 1);
/* Set the forward link to whoever we were pointing to */
ColorTable->Flink = Pfn1->OriginalPte.u.Long;
/* Get the first page on the color list */
if (ColorTable->Flink == LIST_HEAD)
{
/* This is the beginning of the list, so set the sentinel value */
ColorTable->Blink = (PVOID)LIST_HEAD;
}
else
{
/* The list is empty, so we are the first page */
MI_PFN_ELEMENT(ColorTable->Flink)->u4.PteFrame = COLORED_LIST_HEAD;
}
/* One less page */
ColorTable->Count--;
/* ReactOS Hack */
Pfn1->OriginalPte.u.Long = 0;
/* Decrement number of available pages */
MiDecrementAvailablePages();
#if MI_TRACE_PFNS
ASSERT(MI_PFN_CURRENT_USAGE != MI_USAGE_NOT_SET);
Pfn1->PfnUsage = MI_PFN_CURRENT_USAGE;
memcpy(Pfn1->ProcessName, MI_PFN_CURRENT_PROCESS_NAME, 16);
Pfn1->CallSite = _ReturnAddress();
MI_PFN_CURRENT_USAGE = MI_USAGE_NOT_SET;
MI_SET_PROCESS2("Not Set");
#endif
/* Return the page */
return PageIndex;
}
PFN_NUMBER
NTAPI
MiRemoveAnyPage(IN ULONG Color)
{
PFN_NUMBER PageIndex;
PMMPFN Pfn1;
/* Make sure PFN lock is held and we have pages */
MI_ASSERT_PFN_LOCK_HELD();
ASSERT(Color < MmSecondaryColors);
if (MmAvailablePages == 0)
{
return 0;
}
/* Check the colored free list */
PageIndex = MmFreePagesByColor[FreePageList][Color].Flink;
if (PageIndex == LIST_HEAD)
{
/* Check the colored zero list */
PageIndex = MmFreePagesByColor[ZeroedPageList][Color].Flink;
if (PageIndex == LIST_HEAD)
{
/* Check the free list */
ASSERT_LIST_INVARIANT(&MmFreePageListHead);
PageIndex = MmFreePageListHead.Flink;
Color = PageIndex & MmSecondaryColorMask;
if (PageIndex == LIST_HEAD)
{
/* Check the zero list */
ASSERT_LIST_INVARIANT(&MmZeroedPageListHead);
PageIndex = MmZeroedPageListHead.Flink;
Color = PageIndex & MmSecondaryColorMask;
ASSERT(PageIndex != LIST_HEAD);
if (PageIndex == LIST_HEAD)
{
/* FIXME: Should check the standby list */
ASSERT(MmZeroedPageListHead.Total == 0);
}
}
}
}
/* Remove the page from its list */
PageIndex = MiRemovePageByColor(PageIndex, Color);
ASSERT(PageIndex != 0);
/* Sanity checks */
Pfn1 = MI_PFN_ELEMENT(PageIndex);
ASSERT((Pfn1->u3.e1.PageLocation == FreePageList) ||
(Pfn1->u3.e1.PageLocation == ZeroedPageList));
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
ASSERT(Pfn1->u2.ShareCount == 0);
ASSERT_LIST_INVARIANT(&MmFreePageListHead);
ASSERT_LIST_INVARIANT(&MmZeroedPageListHead);
/* Return the page */
return PageIndex;
}
PFN_NUMBER
NTAPI
MiRemoveZeroPage(IN ULONG Color)
{
PFN_NUMBER PageIndex;
PMMPFN Pfn1;
BOOLEAN Zero = FALSE;
/* Make sure PFN lock is held and we have pages */
MI_ASSERT_PFN_LOCK_HELD();
ASSERT(Color < MmSecondaryColors);
if (MmAvailablePages == 0)
{
return 0;
}
/* Check the colored zero list */
PageIndex = MmFreePagesByColor[ZeroedPageList][Color].Flink;
if (PageIndex == LIST_HEAD)
{
/* Check the zero list */
ASSERT_LIST_INVARIANT(&MmZeroedPageListHead);
PageIndex = MmZeroedPageListHead.Flink;
if (PageIndex == LIST_HEAD)
{
/* This means there's no zero pages, we have to look for free ones */
ASSERT(MmZeroedPageListHead.Total == 0);
Zero = TRUE;
/* Check the colored free list */
PageIndex = MmFreePagesByColor[FreePageList][Color].Flink;
if (PageIndex == LIST_HEAD)
{
/* 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);
}
}
}
else
{
Color = PageIndex & MmSecondaryColorMask;
}
}
/* Sanity checks */
Pfn1 = MI_PFN_ELEMENT(PageIndex);
ASSERT((Pfn1->u3.e1.PageLocation == FreePageList) ||
(Pfn1->u3.e1.PageLocation == ZeroedPageList));
/* Remove the page from its list */
PageIndex = MiRemovePageByColor(PageIndex, Color);
ASSERT(PageIndex != 0);
ASSERT(Pfn1 == MI_PFN_ELEMENT(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;
}
VOID
NTAPI
MiInsertPageInFreeList(IN PFN_NUMBER PageFrameIndex)
{
PMMPFNLIST ListHead;
PFN_NUMBER LastPage;
PMMPFN Pfn1;
ULONG Color;
PMMPFN Blink;
PMMCOLOR_TABLES ColorTable;
/* Make sure the page index is valid */
MI_ASSERT_PFN_LOCK_HELD();
ASSERT((PageFrameIndex != 0) &&
(PageFrameIndex <= MmHighestPhysicalPage) &&
(PageFrameIndex >= MmLowestPhysicalPage));
/* Get the PFN entry */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
/* Sanity checks that a right kind of page is being inserted here */
ASSERT(Pfn1->u4.MustBeCached == 0);
ASSERT(Pfn1->u3.e1.Rom != 1);
ASSERT(Pfn1->u3.e1.RemovalRequested == 0);
ASSERT(Pfn1->u4.VerifierAllocation == 0);
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
/* Get the free page list and increment its count */
ListHead = &MmFreePageListHead;
ASSERT_LIST_INVARIANT(ListHead);
ListHead->Total++;
/* Get the last page on the list */
LastPage = ListHead->Blink;
if (LastPage != LIST_HEAD)
{
/* Link us with the previous page, so we're at the end now */
MI_PFN_ELEMENT(LastPage)->u1.Flink = PageFrameIndex;
}
else
{
/* The list is empty, so we are the first page */
ListHead->Flink = PageFrameIndex;
}
/* Now make the list head point back to us (since we go at the end) */
ListHead->Blink = PageFrameIndex;
ASSERT_LIST_INVARIANT(ListHead);
/* And initialize our own list pointers */
Pfn1->u1.Flink = LIST_HEAD;
Pfn1->u2.Blink = LastPage;
/* Set the list name and default priority */
Pfn1->u3.e1.PageLocation = FreePageList;
Pfn1->u4.Priority = 3;
/* Clear some status fields */
Pfn1->u4.InPageError = 0;
Pfn1->u4.AweAllocation = 0;
/* Increment number of available pages */
MiIncrementAvailablePages();
/* Get the page color */
Color = PageFrameIndex & MmSecondaryColorMask;
/* Get the first page on the color list */
ColorTable = &MmFreePagesByColor[FreePageList][Color];
if (ColorTable->Flink == LIST_HEAD)
{
/* The list is empty, so we are the first page */
Pfn1->u4.PteFrame = COLORED_LIST_HEAD;
ColorTable->Flink = PageFrameIndex;
}
else
{
/* Get the previous page */
Blink = (PMMPFN)ColorTable->Blink;
/* Make it link to us, and link back to it */
Blink->OriginalPte.u.Long = PageFrameIndex;
Pfn1->u4.PteFrame = MiGetPfnEntryIndex(Blink);
}
/* Now initialize our own list pointers */
ColorTable->Blink = Pfn1;
/* This page is now the last */
Pfn1->OriginalPte.u.Long = LIST_HEAD;
/* And increase the count in the colored list */
ColorTable->Count++;
/* Notify zero page thread if enough pages are on the free list now */
if (ListHead->Total >= 8)
{
/* Set the event */
KeSetEvent(&MmZeroingPageEvent, IO_NO_INCREMENT, FALSE);
}
#if MI_TRACE_PFNS
Pfn1->PfnUsage = MI_USAGE_FREE_PAGE;
RtlZeroMemory(Pfn1->ProcessName, 16);
Pfn1->CallSite = NULL;
#endif
}
VOID
FASTCALL
MiInsertStandbyListAtFront(IN PFN_NUMBER PageFrameIndex)
{
PMMPFNLIST ListHead;
PFN_NUMBER Flink;
PMMPFN Pfn1, Pfn2;
/* Make sure the lock is held */
DPRINT("Inserting page: %lx into standby list !\n", PageFrameIndex);
MI_ASSERT_PFN_LOCK_HELD();
/* Make sure the PFN is valid */
ASSERT((PageFrameIndex != 0) &&
(PageFrameIndex <= MmHighestPhysicalPage) &&
(PageFrameIndex >= MmLowestPhysicalPage));
/* Grab the PFN and validate it is the right kind of PFN being inserted */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
ASSERT(Pfn1->u4.MustBeCached == 0);
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
ASSERT(Pfn1->u3.e1.PrototypePte == 1);
ASSERT(Pfn1->u3.e1.Rom != 1);
/* One more transition page on a list */
MmTransitionSharedPages++;
/* Get the standby page list and increment its count */
ListHead = &MmStandbyPageListByPriority [Pfn1->u4.Priority];
ASSERT_LIST_INVARIANT(ListHead);
ListHead->Total++;
/* Make the head of the list point to this page now */
Flink = ListHead->Flink;
ListHead->Flink = PageFrameIndex;
/* Make the page point to the previous head, and back to the list */
Pfn1->u1.Flink = Flink;
Pfn1->u2.Blink = LIST_HEAD;
/* Was the list empty? */
if (Flink != LIST_HEAD)
{
/* It wasn't, so update the backlink of the previous head page */
Pfn2 = MI_PFN_ELEMENT(Flink);
Pfn2->u2.Blink = PageFrameIndex;
}
else
{
/* It was empty, so have it loop back around to this new page */
ListHead->Blink = PageFrameIndex;
}
/* Move the page onto its new location */
Pfn1->u3.e1.PageLocation = StandbyPageList;
/* Increment number of available pages */
MiIncrementAvailablePages();
}
VOID
NTAPI
MiInsertPageInList(IN PMMPFNLIST ListHead,
IN PFN_NUMBER PageFrameIndex)
{
PFN_NUMBER Flink, LastPage;
PMMPFN Pfn1, Pfn2;
MMLISTS ListName;
PMMCOLOR_TABLES ColorHead;
ULONG Color;
/* For free pages, use MiInsertPageInFreeList */
ASSERT(ListHead != &MmFreePageListHead);
/* Make sure the lock is held */
MI_ASSERT_PFN_LOCK_HELD();
/* Make sure the PFN is valid */
ASSERT((PageFrameIndex) &&
(PageFrameIndex <= MmHighestPhysicalPage) &&
(PageFrameIndex >= MmLowestPhysicalPage));
/* Page should be unused */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
ASSERT(Pfn1->u3.e1.Rom != 1);
/* Is a standby or modified page being inserted? */
ListName = ListHead->ListName;
if ((ListName == StandbyPageList) || (ListName == ModifiedPageList))
{
/* If the page is in transition, it must also be a prototype page */
if ((Pfn1->OriginalPte.u.Soft.Prototype == 0) &&
(Pfn1->OriginalPte.u.Soft.Transition == 1))
{
/* Crash the system on inconsistency */
KeBugCheckEx(MEMORY_MANAGEMENT, 0x8888, 0, 0, 0);
}
}
/* Standby pages are prioritized, so we need to get the real head */
if (ListHead == &MmStandbyPageListHead)
{
/* Obviously the prioritized list should still have the same name */
ListHead = &MmStandbyPageListByPriority[Pfn1->u4.Priority];
ASSERT(ListHead->ListName == ListName);
}
/* Increment the list count */
ListHead->Total++;
/* Is a modified page being inserted? */
if (ListHead == &MmModifiedPageListHead)
{
/* For now, only single-prototype pages should end up in this path */
DPRINT("Modified page being added: %lx\n", PageFrameIndex);
ASSERT(Pfn1->OriginalPte.u.Soft.Prototype == 0);
/* Modified pages are colored when they are selected for page file */
ListHead = &MmModifiedPageListByColor[0];
ASSERT (ListHead->ListName == ListName);
ListHead->Total++;
/* Increment the number of paging file modified pages */
MmTotalPagesForPagingFile++;
}
/* Don't handle bad pages yet yet */
ASSERT(Pfn1->u3.e1.RemovalRequested == 0);
/* Zero pages go to the head, all other pages go to the end */
if (ListName == ZeroedPageList)
{
/* Make the head of the list point to this page now */
Flink = ListHead->Flink;
ListHead->Flink = PageFrameIndex;
/* Make the page point to the previous head, and back to the list */
Pfn1->u1.Flink = Flink;
Pfn1->u2.Blink = LIST_HEAD;
/* Was the list empty? */
if (Flink != LIST_HEAD)
{
/* It wasn't, so update the backlink of the previous head page */
Pfn2 = MI_PFN_ELEMENT(Flink);
Pfn2->u2.Blink = PageFrameIndex;
}
else
{
/* It was empty, so have it loop back around to this new page */
ListHead->Blink = PageFrameIndex;
}
}
else
{
/* Get the last page on the list */
LastPage = ListHead->Blink;
if (LastPage != LIST_HEAD)
{
/* Link us with the previous page, so we're at the end now */
MI_PFN_ELEMENT(LastPage)->u1.Flink = PageFrameIndex;
}
else
{
/* The list is empty, so we are the first page */
ListHead->Flink = PageFrameIndex;
}
/* Now make the list head point back to us (since we go at the end) */
ListHead->Blink = PageFrameIndex;
ASSERT_LIST_INVARIANT(ListHead);
/* And initialize our own list pointers */
Pfn1->u1.Flink = LIST_HEAD;
Pfn1->u2.Blink = LastPage;
}
/* Move the page onto its new location */
Pfn1->u3.e1.PageLocation = ListName;
/* For zero/free pages, we also have to handle the colored lists */
if (ListName <= StandbyPageList)
{
/* Increment number of available pages */
MiIncrementAvailablePages();
/* Sanity checks */
ASSERT(ListName == ZeroedPageList);
ASSERT(Pfn1->u4.InPageError == 0);
/* Get the page color */
Color = PageFrameIndex & MmSecondaryColorMask;
/* Get the list for this color */
ColorHead = &MmFreePagesByColor[ZeroedPageList][Color];
/* Get the old head */
Flink = ColorHead->Flink;
/* Make this page point back to the list, and point forwards to the old head */
Pfn1->OriginalPte.u.Long = Flink;
Pfn1->u4.PteFrame = COLORED_LIST_HEAD;
/* Set the new head */
ColorHead->Flink = PageFrameIndex;
/* Was the head empty? */
if (Flink != LIST_HEAD)
{
/* No, so make the old head point to this page */
Pfn2 = MI_PFN_ELEMENT(Flink);
Pfn2->u4.PteFrame = PageFrameIndex;
}
else
{
/* Yes, make it loop back to this page */
ColorHead->Blink = (PVOID)Pfn1;
}
/* One more paged on the colored list */
ColorHead->Count++;
#if MI_TRACE_PFNS
ASSERT(MI_PFN_CURRENT_USAGE == MI_USAGE_NOT_SET);
Pfn1->PfnUsage = MI_USAGE_FREE_PAGE;
RtlZeroMemory(Pfn1->ProcessName, 16);
Pfn1->CallSite = NULL;
#endif
}
else if (ListName == ModifiedPageList)
{
/* In ARM3, page must be destined for page file, and not yet written out */
ASSERT(Pfn1->OriginalPte.u.Soft.Prototype == 0);
ASSERT(Pfn1->OriginalPte.u.Soft.PageFileHigh == 0);
/* One more transition page */
MmTransitionSharedPages++;
/* Increment the number of per-process modified pages */
PsGetCurrentProcess()->ModifiedPageCount++;
/* FIXME: Wake up modified page writer if there are not enough free pages */
}
else if (ListName == ModifiedNoWritePageList)
{
/* This list is not yet implemented */
ASSERT(FALSE);
}
}
VOID
NTAPI
MiInitializePfn(IN PFN_NUMBER PageFrameIndex,
IN PMMPTE PointerPte,
IN BOOLEAN Modified)
{
PMMPFN Pfn1;
NTSTATUS Status;
PMMPTE PointerPtePte;
MI_ASSERT_PFN_LOCK_HELD();
/* Setup the PTE */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
Pfn1->PteAddress = PointerPte;
DPRINT("Called for %p from %p\n", Pfn1, _ReturnAddress());
/* Check if this PFN is part of a valid address space */
if (PointerPte->u.Hard.Valid == 1)
{
/* Only valid from MmCreateProcessAddressSpace path */
ASSERT(PsGetCurrentProcess()->Vm.WorkingSetSize == 0);
/* Make this a demand zero PTE */
MI_MAKE_SOFTWARE_PTE(&Pfn1->OriginalPte, MM_READWRITE);
}
else
{
/* Copy the PTE data */
Pfn1->OriginalPte = *PointerPte;
ASSERT(!((Pfn1->OriginalPte.u.Soft.Prototype == 0) &&
(Pfn1->OriginalPte.u.Soft.Transition == 1)));
}
/* Otherwise this is a fresh page -- set it up */
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
Pfn1->u3.e2.ReferenceCount = 1;
Pfn1->u2.ShareCount = 1;
Pfn1->u3.e1.PageLocation = ActiveAndValid;
ASSERT(Pfn1->u3.e1.Rom == 0);
Pfn1->u3.e1.Modified = Modified;
/* Get the page table for the PTE */
PointerPtePte = MiAddressToPte(PointerPte);
if (PointerPtePte->u.Hard.Valid == 0)
{
/* Make sure the PDE gets paged in properly */
Status = MiCheckPdeForPagedPool(PointerPte);
if (!NT_SUCCESS(Status))
{
/* Crash */
KeBugCheckEx(MEMORY_MANAGEMENT,
0x61940,
(ULONG_PTR)PointerPte,
(ULONG_PTR)PointerPtePte->u.Long,
(ULONG_PTR)MiPteToAddress(PointerPte));
}
}
/* Get the PFN for the page table */
PageFrameIndex = PFN_FROM_PTE(PointerPtePte);
ASSERT(PageFrameIndex != 0);
Pfn1->u4.PteFrame = PageFrameIndex;
DPRINT("Incrementing share count of %lp from %p\n", PageFrameIndex, _ReturnAddress());
/* Increase its share count so we don't get rid of it */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
Pfn1->u2.ShareCount++;
}
VOID
NTAPI
MiInitializePfnAndMakePteValid(IN PFN_NUMBER PageFrameIndex,
IN PMMPTE PointerPte,
IN MMPTE TempPte)
{
PMMPFN Pfn1;
NTSTATUS Status;
PMMPTE PointerPtePte;
MI_ASSERT_PFN_LOCK_HELD();
/* PTE must be invalid */
ASSERT(PointerPte->u.Hard.Valid == 0);
/* Setup the PTE */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
Pfn1->PteAddress = PointerPte;
Pfn1->OriginalPte = DemandZeroPte;
DPRINT("Incrementing %p from %p\n", Pfn1, _ReturnAddress());
/* Otherwise this is a fresh page -- set it up */
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
Pfn1->u3.e2.ReferenceCount++;
Pfn1->u2.ShareCount++;
Pfn1->u3.e1.PageLocation = ActiveAndValid;
ASSERT(Pfn1->u3.e1.Rom == 0);
Pfn1->u3.e1.Modified = 1;
/* Get the page table for the PTE */
PointerPtePte = MiAddressToPte(PointerPte);
if (PointerPtePte->u.Hard.Valid == 0)
{
/* Make sure the PDE gets paged in properly */
Status = MiCheckPdeForPagedPool(PointerPte);
if (!NT_SUCCESS(Status))
{
/* Crash */
KeBugCheckEx(MEMORY_MANAGEMENT,
0x61940,
(ULONG_PTR)PointerPte,
(ULONG_PTR)PointerPtePte->u.Long,
(ULONG_PTR)MiPteToAddress(PointerPte));
}
}
/* Get the PFN for the page table */
PageFrameIndex = PFN_FROM_PTE(PointerPtePte);
ASSERT(PageFrameIndex != 0);
Pfn1->u4.PteFrame = PageFrameIndex;
/* Increase its share count so we don't get rid of it */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
Pfn1->u2.ShareCount++;
DPRINT("Incrementing %p from %p\n", Pfn1, _ReturnAddress());
/* Write valid PTE */
MI_WRITE_VALID_PTE(PointerPte, TempPte);
}
NTSTATUS
NTAPI
MiInitializeAndChargePfn(OUT PPFN_NUMBER PageFrameIndex,
IN PMMPDE PointerPde,
IN PFN_NUMBER ContainingPageFrame,
IN BOOLEAN SessionAllocation)
{
MMPDE TempPde;
KIRQL OldIrql;
/* Use either a global or local PDE */
TempPde = SessionAllocation ? ValidKernelPdeLocal : ValidKernelPde;
/* Lock the PFN database */
OldIrql = MiAcquirePfnLock();
/* Make sure nobody is racing us */
if (PointerPde->u.Hard.Valid == 1)
{
/* Return special error if that was the case */
MiReleasePfnLock(OldIrql);
return STATUS_RETRY;
}
/* Grab a zero page and set the PFN, then make it valid */
*PageFrameIndex = MiRemoveZeroPage(MI_GET_NEXT_COLOR());
TempPde.u.Hard.PageFrameNumber = *PageFrameIndex;
MI_WRITE_VALID_PDE(PointerPde, TempPde);
/* Initialize the PFN */
MiInitializePfnForOtherProcess(*PageFrameIndex,
PointerPde,
ContainingPageFrame);
ASSERT(MI_PFN_ELEMENT(*PageFrameIndex)->u1.WsIndex == 0);
/* Release the lock and return success */
MiReleasePfnLock(OldIrql);
return STATUS_SUCCESS;
}
VOID
NTAPI
MiDecrementShareCount(IN PMMPFN Pfn1,
IN PFN_NUMBER PageFrameIndex)
{
PMMPTE PointerPte;
MMPTE TempPte;
ASSERT(PageFrameIndex > 0);
ASSERT(MI_PFN_ELEMENT(PageFrameIndex) != NULL);
ASSERT(Pfn1 == MI_PFN_ELEMENT(PageFrameIndex));
ASSERT(MI_IS_ROS_PFN(Pfn1) == FALSE);
DPRINT("Decrementing %p from %p\n", Pfn1, _ReturnAddress());
/* Page must be in-use */
if ((Pfn1->u3.e1.PageLocation != ActiveAndValid) &&
(Pfn1->u3.e1.PageLocation != StandbyPageList))
{
/* Otherwise we have PFN corruption */
KeBugCheckEx(PFN_LIST_CORRUPT,
0x99,
PageFrameIndex,
Pfn1->u3.e1.PageLocation,
0);
}
/* Page should at least have one reference */
ASSERT(Pfn1->u3.e2.ReferenceCount != 0);
/* Check if the share count is now 0 */
ASSERT(Pfn1->u2.ShareCount < 0xF000000);
if (!--Pfn1->u2.ShareCount)
{
/* Was this a prototype PTE? */
if (Pfn1->u3.e1.PrototypePte)
{
/* Grab the PTE address and make sure it's in prototype pool */
PointerPte = Pfn1->PteAddress;
ASSERT((PointerPte >= (PMMPTE)MmPagedPoolStart) && (PointerPte <= (PMMPTE)MmPagedPoolEnd));
/* The PTE that backs it should also be valdi */
PointerPte = MiAddressToPte(PointerPte);
ASSERT(PointerPte->u.Hard.Valid == 1);
/* Get the original prototype PTE and turn it into a transition PTE */
PointerPte = Pfn1->PteAddress;
TempPte = *PointerPte;
TempPte.u.Soft.Transition = 1;
TempPte.u.Soft.Valid = 0;
TempPte.u.Soft.Prototype = 0;
TempPte.u.Soft.Protection = Pfn1->OriginalPte.u.Soft.Protection;
MI_WRITE_INVALID_PTE(PointerPte, TempPte);
DPRINT("Marking PTE: %p as transition (%p - %lx)\n", PointerPte, Pfn1, MiGetPfnEntryIndex(Pfn1));
}
/* Put the page in transition */
Pfn1->u3.e1.PageLocation = TransitionPage;
/* PFN lock must be held */
MI_ASSERT_PFN_LOCK_HELD();
if (Pfn1->u3.e2.ReferenceCount == 1)
{
/* Is there still a PFN for this page? */
if (MI_IS_PFN_DELETED(Pfn1))
{
/* Clear the last reference */
Pfn1->u3.e2.ReferenceCount = 0;
ASSERT(Pfn1->OriginalPte.u.Soft.Prototype == 0);
/* Mark the page temporarily as valid, we're going to make it free soon */
Pfn1->u3.e1.PageLocation = ActiveAndValid;
/* Bring it back into the free list */
MiInsertPageInFreeList(PageFrameIndex);
}
else
{
/* PFN not yet deleted, drop a ref count */
MiDecrementReferenceCount(Pfn1, PageFrameIndex);
}
}
else
{
/* Otherwise, just drop the reference count */
InterlockedDecrement16((PSHORT)&Pfn1->u3.e2.ReferenceCount);
}
}
}
VOID
NTAPI
MmDereferencePage(PFN_NUMBER Pfn);
VOID
NTAPI
MiDecrementReferenceCount(IN PMMPFN Pfn1,
IN PFN_NUMBER PageFrameIndex)
{
/* PFN lock must be held */
MI_ASSERT_PFN_LOCK_HELD();
/* Handle RosMm PFNs here, too (in case they got locked/unlocked by ARM3) */
if (MI_IS_ROS_PFN(Pfn1))
{
MmDereferencePage(PageFrameIndex);
return;
}
/* Sanity checks on the page */
if (PageFrameIndex > MmHighestPhysicalPage ||
Pfn1 != MI_PFN_ELEMENT(PageFrameIndex) ||
Pfn1->u3.e2.ReferenceCount == 0 ||
Pfn1->u3.e2.ReferenceCount >= 2500)
{
DPRINT1("PageFrameIndex=0x%lx, MmHighestPhysicalPage=0x%lx\n", PageFrameIndex, MmHighestPhysicalPage);
DPRINT1("Pfn1=%p, Element=%p, RefCount=%u\n", Pfn1, MI_PFN_ELEMENT(PageFrameIndex), Pfn1->u3.e2.ReferenceCount);
ASSERT(PageFrameIndex <= MmHighestPhysicalPage);
ASSERT(Pfn1 == MI_PFN_ELEMENT(PageFrameIndex));
ASSERT(Pfn1->u3.e2.ReferenceCount != 0);
ASSERT(Pfn1->u3.e2.ReferenceCount < 2500);
}
/* Dereference the page, bail out if it's still alive */
InterlockedDecrement16((PSHORT)&Pfn1->u3.e2.ReferenceCount);
if (Pfn1->u3.e2.ReferenceCount) return;
/* Nobody should still have reference to this page */
if (Pfn1->u2.ShareCount != 0)
{
/* Otherwise something's really wrong */
KeBugCheckEx(PFN_LIST_CORRUPT, 7, PageFrameIndex, Pfn1->u2.ShareCount, 0);
}
/* And it should be lying on some page list */
ASSERT(Pfn1->u3.e1.PageLocation != ActiveAndValid);
/* Did someone set the delete flag? */
if (MI_IS_PFN_DELETED(Pfn1))
{
/* Insert it into the free list, there's nothing left to do */
MiInsertPageInFreeList(PageFrameIndex);
return;
}
/* Check to see which list this page should go into */
if (Pfn1->u3.e1.Modified == 1)
{
/* Push it into the modified page list */
MiInsertPageInList(&MmModifiedPageListHead, PageFrameIndex);
}
else
{
/* Otherwise, insert this page into the standby list */
ASSERT(Pfn1->u3.e1.RemovalRequested == 0);
MiInsertStandbyListAtFront(PageFrameIndex);
}
}
VOID
NTAPI
MiInitializePfnForOtherProcess(IN PFN_NUMBER PageFrameIndex,
IN PVOID PteAddress,
IN PFN_NUMBER PteFrame)
{
PMMPFN Pfn1;
/* Setup the PTE */
Pfn1 = MI_PFN_ELEMENT(PageFrameIndex);
Pfn1->PteAddress = PteAddress;
/* Make this a software PTE */
MI_MAKE_SOFTWARE_PTE(&Pfn1->OriginalPte, MM_READWRITE);
DPRINT("Called for %p from %p\n", Pfn1, _ReturnAddress());
/* Setup the page */
ASSERT(Pfn1->u3.e2.ReferenceCount == 0);
Pfn1->u3.e2.ReferenceCount = 1;
Pfn1->u2.ShareCount = 1;
Pfn1->u3.e1.PageLocation = ActiveAndValid;
Pfn1->u3.e1.Modified = TRUE;
Pfn1->u4.InPageError = FALSE;
/* Did we get a PFN for the page table */
if (PteFrame)
{
/* Store it */
Pfn1->u4.PteFrame = PteFrame;
/* Increase its share count so we don't get rid of it */
Pfn1 = MI_PFN_ELEMENT(PteFrame);
DPRINT("Incrementing %p from %p\n", Pfn1, _ReturnAddress());
Pfn1->u2.ShareCount++;
}
}
/* EOF */
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