Implemented Higher Half Kernel!

- Minor makefile chnages
- stage3.c "prekernel", sets up memory stuff and jumps to kernel
- kernel is now at 0xC0000000 - 3GB+ "higher half"
- Added some global variables in memory/addresses.h

include/memory/addresses.h

@@ -1,10 +1,18 @@
 #ifndef ADDRESSES_H
 #define ADDRESSES_H
 
-#define MEMMAP_AREA 0x30000
-#define KERNEL_LOC 0x50000
-#define FILETABLE_LOC 0x7000
-#define SMAP_ENTRY_COUNT 0x8500
-#define SMAP_ENTRIES 0x8504
+// Locations
+#define KERNEL_LOC              0x100000
+#define FILETABLE_LOC           0x7000
+
+// Physical memory manager
+#define MEMMAP_AREA             0x30000
+#define SMAP_ENTRY_COUNT        0x8500
+#define SMAP_ENTRIES            0x8504
+#define PHYS_MEM_MAX_BLOCKS     0x1804
+#define PHYS_MEM_USED_BLOCKS    0x1808
+
+// Virtual memory manager
+#define CURRENT_PAGE_DIR_ADDR   0x1800
 
 #endif