Store page map level

sdk/xtdk/xtfw.h

@@ -108,6 +108,7 @@ typedef struct _LOADER_GRAPHICS_INFORMATION_BLOCK
 typedef struct _LOADER_INFORMATION_BLOCK
 {
     PVOID DbgPrint;
+    ULONG PageMapLevel;
     LOADER_GRAPHICS_INFORMATION_BLOCK FrameBuffer;
 } LOADER_INFORMATION_BLOCK, *PLOADER_INFORMATION_BLOCK;
 

xtldr/modules/xtos_o/xtos.c

@@ -468,6 +468,9 @@ XtpInitializeLoaderBlock(IN PXTBL_PAGE_MAPPING PageMap,
         LoaderBlock->LoaderInformation.FrameBuffer.Initialized = FALSE;
     }
 
+    /* Store page map level */
+    LoaderBlock->LoaderInformation.PageMapLevel = 3;
+
     /* Close FrameBuffer protocol */
     XtLdrProtocol->Protocol.Close(ProtocolHandle, &FrameBufGuid);
 

xtoskrnl/includes/globals.h

@@ -57,4 +57,7 @@ EXTERN ULONG MmNumberOfPhysicalPages;
 /* Old biggest free memory descriptor */
 EXTERN LOADER_MEMORY_MAPPING MmOldFreeDescriptor;
 
+/* Page Map Level */
+EXTERN ULONG MmPageMapLevel;
+
 #endif /* __XTOSKRNL_GLOBALS_H */

xtoskrnl/mm/globals.c

@@ -23,3 +23,6 @@ ULONG MmNumberOfPhysicalPages;
 
 /* Old biggest free memory descriptor */
 LOADER_MEMORY_MAPPING MmOldFreeDescriptor;
+
+/* Page Map Level */
+ULONG MmPageMapLevel;

xtoskrnl/mm/init.c

@@ -31,6 +31,9 @@ MmInitializeMemoryManager(VOID)
         KePanic(0);
     }
 
+    /* Store Page Map Level */
+    MmPageMapLevel = KeInitializationBlock->LoaderInformation.PageMapLevel;
+
     /* Proceed with architecture specific initialization */
     MmpInitializeArchitecture();
 }
@@ -108,7 +111,6 @@ MmpScanMemoryDescriptors(VOID)
 
     /* Store original free descriptor */
     RtlCopyMemory(&MmOldFreeDescriptor, MmFreeDescriptor, sizeof(LOADER_MEMORY_MAPPING));
-
 }
 
 /** Checks whether the specified memory type should be considered as free.