[memory] Rework memory_initialize for new loader

Created a new `memory_initialize()` function that uses the new-style
kernel args structure from the new bootloader.

Additionally:
* Fixed a hard-coded interrupt EOI address that didn't work with new
  memory locations
* Make the `page_manager::fault_handler()` automatically grant pages
  in the kernel heap

Tags: boot page fault

src/kernel/page_table.h

@@ -36,6 +36,10 @@ struct page_table
 			(entries[i] & 0x80) == 0x80;
 	}
 
+	inline bool is_page(level l, int i) const {
+		return (l == level::pt) || is_large_page(l, i);
+	}
+
 	void dump(
 		level lvl = level::pml4,
 		bool recurse = true);