score: Introduce map priority scheduler operation

Introduce map/unmap priority scheduler operations to map thread priority
values from/to the user domain to/from the scheduler domain.  Use the
map priority operation to validate the thread priority.  The EDF
schedulers use this new operation to distinguish between normal
priorities and priorities obtain through a job release.

Update #2173.
Update #2556.

1 files changed, 27 insertions, 0 deletions

diff --git a/cpukit/score/include/rtems/score/scheduler.h b/cpukit/score/include/rtems/score/scheduler.h
index 2e9aba5072..ba9c2b50bb 100644
--- a/cpukit/score/include/rtems/score/scheduler.h
+++ b/cpukit/score/include/rtems/score/scheduler.h
@@ -91,6 +91,18 @@ typedef struct {
     bool
   );
 
+  /** @see _Scheduler_Map_priority() */
+  Priority_Control ( *map_priority )(
+    const Scheduler_Control *,
+    Priority_Control
+  );
+
+  /** @see _Scheduler_Unmap_priority() */
+  Priority_Control ( *unmap_priority )(
+    const Scheduler_Control *,
+    Priority_Control
+  );
+
 #if defined(RTEMS_SMP)
   /**
    * Ask for help operation.
@@ -403,6 +415,21 @@ extern const Scheduler_Control _Scheduler_Table[];
   extern const Scheduler_Assignment _Scheduler_Assignments[];
 #endif
 
+/**
+ * @brief Returns the thread priority.
+ *
+ * @param[in] scheduler Unused.
+ * @param[in] priority The thread priority.
+ *
+ * @return priority The thread priority.
+ */
+Priority_Control _Scheduler_default_Map_priority(
+  const Scheduler_Control *scheduler,
+  Priority_Control         priority
+);
+
+#define _Scheduler_default_Unmap_priority _Scheduler_default_Map_priority
+
 #if defined(RTEMS_SMP)
   /**
    * @brief Does nothing.