[pschweitzer] 70774: [NTOSKRNL] Implement the MiWriteCombined case of MmMapIoSpace(). This fixes NVIDIA display drivers loading in ReactOS. See: https://www.reactos.org/forum/viewtopic.php?p=120359...

Author: pschweitzer
Date: Mon Feb 22 22:52:35 2016
New Revision: 70774

URL: http://svn.reactos.org/svn/reactos?rev=70774&view=rev
Log:
[NTOSKRNL]
Implement the MiWriteCombined case of MmMapIoSpace().

This fixes NVIDIA display drivers loading in ReactOS. See:
https://www.reactos.org/forum/viewtopic.php?p=120359#p120359

Modified:
    trunk/reactos/ntoskrnl/mm/ARM3/iosup.c

Modified: trunk/reactos/ntoskrnl/mm/ARM3/iosup.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/iosup.c?r…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/iosup.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/iosup.c	[iso-8859-1] Mon Feb 22 22:52:35 2016
@@ -144,9 +144,10 @@
         case MiWriteCombined:
 
             //
-            // We don't support write combining yet
-            //
-            ASSERT(FALSE);
+            // Disable the cache and allow combined writing
+            //
+            MI_PAGE_DISABLE_CACHE(&TempPte);
+            MI_PAGE_WRITE_COMBINED(&TempPte);
             break;
 
         default: