Merge in the newer Xenbus implementation from Linux to the Mini-OS. The new

version compiles and starts up, but I'm not really sure how to test the new
xenbus implementation.

* Added unbind_evtchn
* Copied parts of the Linux spinlock implementation to make the changes to
  xenbus compared to Linux smaller. Also added a dummy rwsem implementation.
* Updated the xenbus-files

Signed-off-by: Simon Kagstrom <simon.kagstrom@bth.se>

1 files changed, 39 insertions, 0 deletions

diff --git a/extras/mini-os/include/semaphore.h b/extras/mini-os/include/semaphore.h
index d30c81e674..47365d25fd 100644
--- a/extras/mini-os/include/semaphore.h
+++ b/extras/mini-os/include/semaphore.h
@@ -2,6 +2,7 @@
 #define _SEMAPHORE_H_
 
 #include <wait.h>
+#include <spinlock.h>
 
 /*
  * Implementation of semaphore in Mini-os is simple, because 
@@ -14,6 +15,15 @@ struct semaphore
 	struct wait_queue_head wait;
 };
 
+/*
+ * the semaphore definition
+ */
+struct rw_semaphore {
+	signed long		count;
+	spinlock_t		wait_lock;
+	struct list_head	wait_list;
+	int			debug;
+};
 
 #define __SEMAPHORE_INITIALIZER(name, n)                            \
 {                                                                   \
@@ -31,6 +41,12 @@ struct semaphore
 
 #define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name,0)
 
+static inline void init_MUTEX(struct semaphore *sem)
+{
+  sem->count = 1;
+  init_waitqueue_head(&sem->wait);
+}
+
 static void inline down(struct semaphore *sem)
 {
     wait_event(sem->wait, sem->count > 0);
@@ -43,4 +59,27 @@ static void inline up(struct semaphore *sem)
     wake_up(&sem->wait);
 }
 
+/* FIXME! Thre read/write semaphores are unimplemented! */
+static inline void init_rwsem(struct rw_semaphore *sem)
+{
+  sem->count = 1;
+}
+
+static inline void down_read(struct rw_semaphore *sem)
+{
+}
+
+
+static inline void up_read(struct rw_semaphore *sem)
+{
+}
+
+static inline void up_write(struct rw_semaphore *sem)
+{
+}
+
+static inline void down_write(struct rw_semaphore *sem)
+{
+}
+
 #endif /* _SEMAPHORE_H */