diff --git a/sdk/xtdk/amd64/mmtypes.h b/sdk/xtdk/amd64/mmtypes.h
index f05f0801..05622444 100644
--- a/sdk/xtdk/amd64/mmtypes.h
+++ b/sdk/xtdk/amd64/mmtypes.h
@@ -73,6 +73,9 @@
 #define MM_PTE_PROTOTYPE                           0x0000000000000400ULL
 #define MM_PTE_TRANSITION                          0x0000000000000800ULL
 
+/* PTE frame bits */
+#define MM_PTE_FRAME_BITS                          57
+
 /* PTE protection bits */
 #define MM_PTE_PROTECTION_BITS                     5
 
diff --git a/sdk/xtdk/i686/mmtypes.h b/sdk/xtdk/i686/mmtypes.h
index 2e1ba89e..469a7083 100644
--- a/sdk/xtdk/i686/mmtypes.h
+++ b/sdk/xtdk/i686/mmtypes.h
@@ -69,6 +69,9 @@
 #define MM_PTE_PROTOTYPE                           0x00000400
 #define MM_PTE_TRANSITION                          0x00000800
 
+/* PTE frame bits */
+#define MM_PTE_FRAME_BITS                          25
+
 /* PTE protection bits */
 #define MM_PTE_PROTECTION_BITS                     5
 
@@ -386,6 +389,7 @@ typedef struct _MMPFN
             USHORT ReferenceCount;
         } e2;
     } u3;
+    ULONG UsedPageTableEntries;
     union
     {
         MMPTE OriginalPte;
@@ -396,12 +400,11 @@ typedef struct _MMPFN
         ULONG_PTR EntireFrame;
         struct
         {
-            ULONG_PTR PteFrame:26;
+            ULONG_PTR PteFrame:25;
             ULONG_PTR InPageError:1;
             ULONG_PTR VerifierAllocation:1;
             ULONG_PTR AweAllocation:1;
-            ULONG_PTR LockCharged:1;
-            ULONG_PTR KernelStack:1;
+            ULONG_PTR Priority:3;
             ULONG_PTR MustBeCached:1;
         };
     } u4;
diff --git a/sdk/xtdk/mmtypes.h b/sdk/xtdk/mmtypes.h
index 193ca8f1..1c0f8a53 100644
--- a/sdk/xtdk/mmtypes.h
+++ b/sdk/xtdk/mmtypes.h
@@ -14,6 +14,18 @@
 #include ARCH_HEADER(xtstruct.h)
 
 
+/* Number of hyper space pages */
+#define MM_HYPERSPACE_PAGE_COUNT                   255
+
+/* Number of paging colors */
+#define MM_PAGING_COLORS                           64
+
+/* PTE frame mask definition */
+#define MM_PFN_PTE_FRAME                           (((ULONG_PTR)1 << MM_PTE_FRAME_BITS) - 1)
+
+/* Number of reserved zeroed PTEs */
+#define MM_RESERVED_ZERO_PTES                      32
+
 /* Memory manager page lists */
 typedef enum _MMPAGELISTS
 {
@@ -27,6 +39,15 @@ typedef enum _MMPAGELISTS
    TransitionPage = 7
 } MMPAGELISTS, *PMMPAGELISTS;
 
+/* Page cache attributes */
+typedef enum _MMPFN_CACHE_ATTRIBUTE
+{
+    PfnNonCached,
+    PfnCached,
+    PfnWriteCombined,
+    PfnNotMapped
+} MMPFN_CACHE_ATTRIBUTE, *PMMPFN_CACHE_ATTRIBUTE;
+
 /* Page table pool types */
 typedef enum _MMSYSTEM_PTE_POOL_TYPE
 {
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index 3b2203d6..50c57c0b 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -49,6 +49,7 @@ typedef enum _KTIMER_TYPE KTIMER_TYPE, *PKTIMER_TYPE;
 typedef enum _KUBSAN_DATA_TYPE KUBSAN_DATA_TYPE, *PKUBSAN_DATA_TYPE;
 typedef enum _LOADER_MEMORY_TYPE LOADER_MEMORY_TYPE, *PLOADER_MEMORY_TYPE;
 typedef enum _MMPAGELISTS MMPAGELISTS, *PMMPAGELISTS;
+typedef enum _MMPFN_CACHE_ATTRIBUTE MMPFN_CACHE_ATTRIBUTE, *PMMPFN_CACHE_ATTRIBUTE;
 typedef enum _MMSYSTEM_PTE_POOL_TYPE MMSYSTEM_PTE_POOL_TYPE, *PMMSYSTEM_PTE_POOL_TYPE;
 typedef enum _MODE MODE, *PMODE;
 typedef enum _RTL_VARIABLE_TYPE RTL_VARIABLE_TYPE, *PRTL_VARIABLE_TYPE;