Major restructure

kern/libkern/memory.h

@@ -0,0 +1,16 @@
+#ifndef MEMORY_KERNEL_H
+#define MEMORY_KERNEL_H
+
+#include <stdint.h>
+
+/* These are hardcoded for now */
+#define KERNBASE 0x80000000L
+#define PHYSTOP  (KERNBASE + 128 * 1024 * 1024)
+
+/**
+ * Returns size in bytes of detected RAM In qemu, it requires a trap handler to
+ * handle the interrupt when accessing unavailable memory.
+ */
+size_t probe_memory(void);
+
+#endif