Added C header for page table management

include/mmgr.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include "types/physaddr.h"
+
+/**
+ * @brief Create a new top-level page table and map the kernel in it.
+ * 
+ * This function does not load the page table; it only initializes it.
+ * 
+ * @return physaddr_t 
+ */
+physaddr_t create_address_space();
+
+/**
+ * @brief Load an existing top-level page table
+ * 
+ * @param table 
+ */
+void load_address_space(physaddr_t table);
+
+/**
+ * @brief Maps a single page with the specified flags.
+ * 
+ * @param page 
+ * @param frame 
+ * @param flags 
+ * @return int 
+ */
+int map_page(void *page, physaddr_t frame, int flags);
+
+/**
+ * @brief Unmaps a single page, returning the physical address of the frame it
+ * pointed to.
+ * 
+ * @param page 
+ * @return physaddr_t 
+ */
+physaddr_t unmap_page(void *page);