From 926bd0522f6c058fdba6b9026ff8c48a03cbfa67 Mon Sep 17 00:00:00 2001
From: Sir Richard <sir_richard@svn.reactos.org>
Date: Wed, 12 May 2010 18:36:15 +0000
Subject: [PATCH] [NTOS]: Compute MiHighestUserPte, MiHighestUserPde,
 MiSessionImagePteStart, MiSessionImagePteEnd, MiSessionBasePte,
 MiSessionLastPte since these internal variables did not exit yet. Useful for
 debugging and also future PFN support. Just computes some values, no behavior
 changes.

svn path=/trunk/; revision=47173
---
 reactos/ntoskrnl/mm/ARM3/mminit.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/reactos/ntoskrnl/mm/ARM3/mminit.c b/reactos/ntoskrnl/mm/ARM3/mminit.c
index 82efa5c5075..5ed08499d98 100644
--- a/reactos/ntoskrnl/mm/ARM3/mminit.c
+++ b/reactos/ntoskrnl/mm/ARM3/mminit.c
@@ -136,6 +136,14 @@ ULONG MmSessionViewSize;
 ULONG MmSessionPoolSize;
 ULONG MmSessionImageSize;
 
+/*
+ * These are the PTE addresses of the boundaries carved out above
+ */
+PMMPTE MiSessionImagePteStart;
+PMMPTE MiSessionImagePteEnd;
+PMMPTE MiSessionBasePte;
+PMMPTE MiSessionLastPte;
+
 //
 // The system view space, on the other hand, is where sections that are memory
 // mapped into "system space" end up.
@@ -217,6 +225,11 @@ ULONG MmUserProbeAddress;
 PVOID MmHighestUserAddress;
 PVOID MmSystemRangeStart;
 
+/* And these store the respective highest PTE/PDE address */
+PMMPTE MiHighestUserPte;
+PMMPDE MiHighestUserPde;
+
+/* These variables define the system cache address space */
 PVOID MmSystemCacheStart;
 PVOID MmSystemCacheEnd;
 MMSUPPORT MmSystemCacheWs;
@@ -1700,6 +1713,10 @@ MmArmInitSystem(IN ULONG Phase,
         MmUserProbeAddress = (ULONG_PTR)MmSystemRangeStart - 0x10000;
         MmHighestUserAddress = (PVOID)(MmUserProbeAddress - 1);
         
+        /* Highest PTE and PDE based on the addresses above */
+        MiHighestUserPte = MiAddressToPte(MmHighestUserAddress);
+        MiHighestUserPde = MiAddressToPde(MmHighestUserAddress);
+        
         //
         // Get the size of the boot loader's image allocations and then round
         // that region up to a PDE size, so that any PDEs we might create for
@@ -1772,7 +1789,12 @@ MmArmInitSystem(IN ULONG Phase,
         //
         MiSystemViewStart = (PVOID)((ULONG_PTR)MmSessionBase -
                                     MmSystemViewSize);
-                                    
+
+        /* Compute the PTE addresses for all the addresses we carved out */
+        MiSessionImagePteStart = MiAddressToPte(MiSessionImageStart);
+        MiSessionImagePteEnd = MiAddressToPte(MiSessionImageEnd);
+        MiSessionBasePte = MiAddressToPte(MmSessionBase);
+        MiSessionLastPte = MiAddressToPte(MiSessionSpaceEnd);
                                     
         /* Initialize the user mode image list */
         InitializeListHead(&MmLoadedUserImageList);