Add helper function to create a blank table

src/mem.c

@@ -161,6 +161,24 @@ page_directory_entry* page_new_directory()
     return pgdir;
 }
 
+// Returns a blank table
+page_table_entry* page_new_table()
+{
+    page_table_entry* pgtab = (page_table_entry*) page_allocate();
+    int i;
+    for(i = 0; i < 1024; i++)
+    {
+        // This sets the following flags to the pages:
+        //   Supervisor: Only kernel-mode can access them
+        //   Write Enabled: It can be both read from and written to
+        //     (this is the 2 bit)
+        //   Not Present: The page table is not present
+        pgtab[i] = 0;
+        pgtab[i] |= PAGE_WRITABLE;
+    }
+    return pgtab;
+}
+
 page_directory_entry* initiate_directory()
 {
     // set each entry to not present

src/mem.h

@@ -37,11 +37,11 @@ void page_free(void* page_start);
 // Initilization
 page_directory_entry* mem_init_kern_tables(multiboot_memory_map* mmap, multiboot_memory_map* mmap_end);
 
-// Directory handling
+// Directory and table handling
 page_directory_entry* page_new_directory();
+page_table_entry* page_new_table();
 page_directory_entry* initiate_directory(); // DEPRECATED
 
-
 // memory mark stores a counter of bytes for the most recently used
 // memory. Everything before it is used and all valid memory after it
 // is free