Cleaner include paths + some paging definitions

src/mem/paging/paging.c

@@ -0,0 +1,13 @@
+#include "paging.h"
+#include <kernel.h>
+
+void paging_init()
+{
+    uint64_t cr3;
+    asm volatile ("mov %%cr3, %0" : "=r"(cr3));
+
+    // Root directory address (cr3 without 12 less significant bits)
+    uint64_t* pml4 = PHYS_TO_VIRT(cr3 & ~0xFFF);
+
+    DEBUG("pml4=0x%p", pml4);
+}