sdk/xtdk/mmtypes.h

@@ -10,8 +10,18 @@
 #define __XTDK_MMTYPES_H
 
 #include <xtbase.h>
+#include ARCH_HEADER(xtstruct.h)
 
 
+/* Page map routines structure definition */
+typedef CONST STRUCT _CMMPAGEMAP_ROUTINES
+{
+    VOID (XTAPI *ClearPte)(PHARDWARE_PTE PtePointer);
+    BOOLEAN (XTAPI *PteValid)(PHARDWARE_PTE PtePointer);
+    VOID (XTAPI *SetPteCaching)(PHARDWARE_PTE PtePointer, BOOLEAN CacheDisable, BOOLEAN WriteThrough);
+    VOID (XTAPI *SetPte)(PHARDWARE_PTE PtePointer, PFN_NUMBER PageFrameNumber, BOOLEAN Writable);
+} CMMPAGEMAP_ROUTINES, *PCMMPAGEMAP_ROUTINES;
+
 /* Color tables structure definition */
 typedef struct _MMCOLOR_TABLES
 {

sdk/xtdk/xtstruct.h

@@ -69,6 +69,7 @@ typedef struct _ANSI_STRING ANSI_STRING, *PANSI_STRING;
 typedef struct _ANSI_STRING32 ANSI_STRING32, *PANSI_STRING32;
 typedef struct _ANSI_STRING64 ANSI_STRING64, *PANSI_STRING64;
 typedef struct _CPPORT CPPORT, *PCPPORT;
+typedef const struct _CMMPAGEMAP_ROUTINES CMMPAGEMAP_ROUTINES, *PCMMPAGEMAP_ROUTINES;
 typedef struct _CSTRING CSTRING, *PCSTRING;
 typedef struct _EFI_1394_DEVICE_PATH EFI_1394_DEVICE_PATH, *PEFI_1394_DEVICE_PATH;
 typedef struct _EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR, *PEFI_ACPI_ADDRESS_SPACE_DESCRIPTOR;

xtoskrnl/CMakeLists.txt

@@ -60,6 +60,7 @@ list(APPEND XTOSKRNL_SOURCE
     ${XTOSKRNL_SOURCE_DIR}/mm/init.c
     ${XTOSKRNL_SOURCE_DIR}/mm/kpools.c
     ${XTOSKRNL_SOURCE_DIR}/mm/pages.c
+    ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/globals.c
     ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/init.c
     ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/pages.c
     ${XTOSKRNL_SOURCE_DIR}/mm/${ARCH}/pmap.c

xtoskrnl/includes/amd64/globals.h

@@ -30,4 +30,10 @@ EXTERN UCHAR ArKernelBootStack[KERNEL_STACK_SIZE];
 /* Kernel own fault stack */
 EXTERN UCHAR ArKernelFaultStack[KERNEL_STACK_SIZE];
 
+/* Page mapping routines for systems using 4-level paging (PML4) */
+EXTERN CMMPAGEMAP_ROUTINES MmpPml4Routines;
+
+/* Page mapping routines for systems using 5-level paging (PML5) */
+EXTERN CMMPAGEMAP_ROUTINES MmpPml5Routines;
+
 #endif /* __XTOSKRNL_AMD64_GLOBALS_H */

xtoskrnl/includes/globals.h

@@ -87,6 +87,9 @@ EXTERN PVOID MmpHardwareHeapStart;
 /* Information about the current page map */
 EXTERN MMPAGEMAP_INFO MmpPageMapInfo;
 
+/* Pointers to page map routines for the current paging mode */
+EXTERN PCMMPAGEMAP_ROUTINES MmpPageMapRoutines;
+
 /* Number of used hardware allocation descriptors */
 EXTERN ULONG MmpUsedHardwareAllocationDescriptors;
 

xtoskrnl/includes/i686/globals.h

@@ -34,4 +34,10 @@ EXTERN UCHAR ArKernelBootStack[KERNEL_STACK_SIZE];
 /* Kernel own fault stack */
 EXTERN UCHAR ArKernelFaultStack[KERNEL_STACK_SIZE];
 
+/* Page mapping routines for systems using 2-level paging (PML2) */
+EXTERN CMMPAGEMAP_ROUTINES MmpPml2Routines;
+
+/* Page mapping routines for systems using 3-level paging (PML3) */
+EXTERN CMMPAGEMAP_ROUTINES MmpPml3Routines;
+
 #endif /* __XTOSKRNL_I686_GLOBALS_H */

xtoskrnl/mm/amd64/globals.c

@@ -0,0 +1,26 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/mm/amd64/globals.c
+ * DESCRIPTION:     AMD64-specific global variables for the Memory Manager
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.h>
+
+
+/* Page mapping routines for systems using 4-level paging (PML4) */
+CMMPAGEMAP_ROUTINES MmpPml4Routines = {
+    // .ClearPte = MmpClearPte,
+    // .PteValid = MmpPml2PteValid,
+    // .SetPteCaching = MmpSetPml2PteCaching,
+    // .SetPte = MmpSetPml2Pte,
+};
+
+/* Page mapping routines for systems using 5-level paging (PML5) */
+CMMPAGEMAP_ROUTINES MmpPml5Routines = {
+    // .ClearPte = MmpClearPte,
+    // .PteValid = MmpPml3PteValid,
+    // .SetPteCaching = MmpSetPml3PteCaching,
+    // .SetPte = MmpSetPml3Pte,
+};

xtoskrnl/mm/globals.c

@@ -36,5 +36,8 @@ PVOID MmpHardwareHeapStart = MM_HARDWARE_HEAP_START_ADDRESS;
 /* Information about the current page map */
 MMPAGEMAP_INFO MmpPageMapInfo;
 
+/* Pointers to page map routines for the current paging mode */
+PCMMPAGEMAP_ROUTINES MmpPageMapRoutines;
+
 /* Number of used hardware allocation descriptors */
 ULONG MmpUsedHardwareAllocationDescriptors = 0;

xtoskrnl/mm/i686/globals.c

@@ -0,0 +1,26 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/mm/i686/globals.c
+ * DESCRIPTION:     i686-specific global variables for the Memory Manager
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.h>
+
+
+/* Page mapping routines for systems using 2-level paging (PML2) */
+CMMPAGEMAP_ROUTINES MmpPml2Routines = {
+    .ClearPte = MmpClearPte,
+    .PteValid = MmpPml2PteValid,
+    .SetPteCaching = MmpSetPml2PteCaching,
+    .SetPte = MmpSetPml2Pte,
+};
+
+/* Page mapping routines for systems using 3-level paging (PML3) */
+CMMPAGEMAP_ROUTINES MmpPml3Routines = {
+    .ClearPte = MmpClearPte,
+    .PteValid = MmpPml3PteValid,
+    .SetPteCaching = MmpSetPml3PteCaching,
+    .SetPte = MmpSetPml3Pte,
+};