[sir_richard] 48977: [NTOS]: Define MI_MAKE_PROTOTYPE_PTE macro to make a real prototype PTE from a PTE. Define counter-part MiProtoPteToPte to recover the true PTE from a given Prototype PTE. [NTO...

Author: sir_richard
Date: Mon Oct  4 18:34:41 2010
New Revision: 48977

URL: http://svn.reactos.org/svn/reactos?rev=48977&view=rev
Log:
[NTOS]: Define MI_MAKE_PROTOTYPE_PTE macro to make a real prototype PTE from a PTE. Define counter-part MiProtoPteToPte to recover the true PTE from a given Prototype PTE.
[NTOS]: Define MI_PTE_LOOKUP_NEEDED instead of using 0xFFFF. The name was found in checked build assertion strings.
[NTOS]: Add MM_VIEW (used for System-mapped Section Views) and MM_SESSSION (used to define the system/session view mappings) structure definitions.

Modified:
    trunk/reactos/ntoskrnl/mm/ARM3/i386/init.c
    trunk/reactos/ntoskrnl/mm/ARM3/miarm.h

Modified: trunk/reactos/ntoskrnl/mm/ARM3/i386/init.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/i386/init....
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/i386/init.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/i386/init.c [iso-8859-1] Mon Oct  4 18:34:41 2010
@@ -26,7 +26,7 @@
 MMPDE DemandZeroPde  = {.u.Long = (MM_READWRITE << MM_PTE_SOFTWARE_PROTECTION_BITS)};

/* Template PTE for prototype page */
-MMPTE PrototypePte = {.u.Long = (MM_READWRITE << MM_PTE_SOFTWARE_PROTECTION_BITS) | PTE_PROTOTYPE | 0xFFFFF000};
+MMPTE PrototypePte = {.u.Long = (MM_READWRITE << MM_PTE_SOFTWARE_PROTECTION_BITS) | PTE_PROTOTYPE | (MI_PTE_LOOKUP_NEEDED << PAGE_SHIFT)};

/* PRIVATE FUNCTIONS **********************************************************/

Modified: trunk/reactos/ntoskrnl/mm/ARM3/miarm.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/miarm.h?re...
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/miarm.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/miarm.h [iso-8859-1] Mon Oct  4 18:34:41 2010
@@ -232,6 +232,18 @@
 #define MI_GET_PAGE_COLOR(x)                ((x) & MmSecondaryColorMask)
 #define MI_GET_NEXT_COLOR(x)                (MI_GET_PAGE_COLOR(++MmSystemPageColor))
 #define MI_GET_NEXT_PROCESS_COLOR(x)        (MI_GET_PAGE_COLOR(++(x)->NextPageColor))
+
+//
+// Decodes a Prototype PTE into the underlying PTE
+//
+#define MiProtoPteToPte(x)                  \
+    (PMMPTE)((ULONG_PTR)MmPagedPoolStart +  \
+             ((x)->u.Proto.ProtoAddressHigh | (x)->u.Proto.ProtoAddressLow))
+
+//
+// Prototype PTEs that don't yet have a pagefile association
+//
+#define MI_PTE_LOOKUP_NEEDED 0xFFFFF

//
 // FIXFIX: These should go in ex.h after the pool merge
@@ -358,6 +370,25 @@
     PFN_NUMBER StartFrame;
     PFN_NUMBER LastFrame;
 } MI_LARGE_PAGE_RANGES, *PMI_LARGE_PAGE_RANGES;
+
+typedef struct _MMVIEW
+{
+    ULONG_PTR Entry;
+    PCONTROL_AREA ControlArea;
+} MMVIEW, *PMMVIEW;
+
+typedef struct _MMSESSION
+{
+    KGUARDED_MUTEX SystemSpaceViewLock;
+    PKGUARDED_MUTEX SystemSpaceViewLockPointer;
+    PCHAR SystemSpaceViewStart;
+    PMMVIEW SystemSpaceViewTable;
+    ULONG SystemSpaceHashSize;
+    ULONG SystemSpaceHashEntries;
+    ULONG SystemSpaceHashKey;
+    ULONG BitmapFailures;
+    PRTL_BITMAP SystemSpaceBitMap;
+} MMSESSION, *PMMSESSION;

extern MMPTE HyperTemplatePte;
 extern MMPDE ValidKernelPde;
@@ -565,6 +596,31 @@
 }

//
+// Builds a Prototype PTE for the address of the PTE
+//
+FORCEINLINE
+VOID
+MI_MAKE_PROTOTYPE_PTE(IN PMMPTE NewPte,
+                      IN PMMPTE PointerPte)
+{
+    ULONG_PTR Offset;
+
+    /* Mark this as a prototype */
+    NewPte->u.Long = 0;
+    NewPte->u.Proto.Prototype = 1;
+    
+    /*
+     * Prototype PTEs are only valid in paged pool by design, this little trick
+     * lets us only use 28 bits for the adress of the PTE
+     */
+    Offset = (ULONG_PTR)PointerPte - (ULONG_PTR)MmPagedPoolStart;
+    
+    /* 7 bits go in the "low", and the other 21 bits go in the "high" */
+    NewPte->u.Proto.ProtoAddressLow = Offset & 0x7F;
+    NewPte->u.Proto.ProtoAddressHigh = Offset & 0xFFFFF80;
+}
+
+//
 // Returns if the page is physically resident (ie: a large page)
 // FIXFIX: CISC/x86 only?
 //
@@ -1107,6 +1163,12 @@
     IN PMMADDRESS_NODE Node
 );

+BOOLEAN
+NTAPI
+MiInitializeSystemSpaceMap(
+    IN PVOID InputSession OPTIONAL
+);
+
 //
 // MiRemoveZeroPage will use inline code to zero out the page manually if only
 // free pages are available. In some scenarios, we don't/can't run that piece of