add ringswitch stuff

kernel/thread/thread.h

@@ -28,12 +28,15 @@ class Thread {
 	/*! \brief pointer to the next element of the readylist
 	 */
 	Thread* queue_link;
+	bool isKernel;
+	void* start;
 
 	friend class Queue<Thread>;
 	friend class Semaphore;
 	/*! \brief Memory reserved for this threads stack
 	 */
-	alignas(16) char reserved_stack_space[STACK_SIZE];
+	alignas(16) char reserved_stack_space_user[STACK_SIZE];
+	alignas(16) char reserved_stack_space_isr[STACK_SIZE];
 
 	struct{
 		void* user;
@@ -80,6 +83,7 @@ class Thread {
 	 *
 	 */
 	explicit Thread();
+	explicit Thread(bool kernel, void * start = nullptr);
 
 	/*! \brief Activates the first thread on this CPU.
 	 *