[sir_richard] 47175: [NTOS]: Fix 4MB assumptions and use PDE_MAPPED_VA instead, which accurately describes the address space mapped by a PDE (which is different on PAE, x64, ARM, etc).

Author: sir_richard
Date: Wed May 12 20:42:05 2010
New Revision: 47175

URL: http://svn.reactos.org/svn/reactos?rev=47175&view=rev
Log:
[NTOS]: Fix 4MB assumptions and use PDE_MAPPED_VA instead, which accurately describes the address space mapped by a PDE (which is different on PAE, x64, ARM, etc).

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

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] Wed May 12 20:42:05 2010
@@ -339,7 +339,7 @@
     MmNonPagedSystemStart = (PVOID)((ULONG_PTR)MmNonPagedPoolStart -
                                     (MmNumberOfSystemPtes + 1) * PAGE_SIZE);
     MmNonPagedSystemStart = (PVOID)((ULONG_PTR)MmNonPagedSystemStart &
-                                    ~((4 * 1024 * 1024) - 1));
+                                    ~(PDE_MAPPED_VA - 1));

//
     // Don't let it go below the minimum
@@ -387,7 +387,7 @@
     //
     MmPfnDatabase[0] = (PVOID)0xB0000000;
     MmPfnDatabase[1] = &MmPfnDatabase[0][MmHighestPhysicalPage];
-    ASSERT(((ULONG_PTR)MmPfnDatabase[0] & ((4 * 1024 * 1024) - 1)) == 0);
+    ASSERT(((ULONG_PTR)MmPfnDatabase[0] & (PDE_MAPPED_VA - 1)) == 0);

//
     // Non paged pool comes after the PFN database

Modified: trunk/reactos/ntoskrnl/mm/ARM3/mminit.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/mminit.c?r...
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/mminit.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/mminit.c [iso-8859-1] Wed May 12 20:42:05 2010
@@ -1725,8 +1725,8 @@
         //
         MmBootImageSize = KeLoaderBlock->Extension->LoaderPagesSpanned;
         MmBootImageSize *= PAGE_SIZE;
-        MmBootImageSize = (MmBootImageSize + (4 * 1024 * 1024) - 1) & ~((4 * 1024 * 1024) - 1);
-        ASSERT((MmBootImageSize % (4 * 1024 * 1024)) == 0);
+        MmBootImageSize = (MmBootImageSize + PDE_MAPPED_VA - 1) & ~(PDE_MAPPED_VA - 1);
+        ASSERT((MmBootImageSize % PDE_MAPPED_VA) == 0);

//
         // Set the size of session view, pool, and image