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, 16 insertions, 0 deletions

diff --git a/cpukit/score/src/scheduleredfchangepriority.c b/cpukit/score/src/scheduleredfchangepriority.c
index 61e0481d03..6efbf87ad3 100644
--- a/cpukit/score/src/scheduleredfchangepriority.c
+++ b/cpukit/score/src/scheduleredfchangepriority.c
@@ -20,6 +20,22 @@
 
 #include <rtems/score/scheduleredfimpl.h>
 
+Priority_Control _Scheduler_EDF_Map_priority(
+  const Scheduler_Control *scheduler,
+  Priority_Control         priority
+)
+{
+  return SCHEDULER_EDF_PRIO_MSB | priority;
+}
+
+Priority_Control _Scheduler_EDF_Unmap_priority(
+  const Scheduler_Control *scheduler,
+  Priority_Control         priority
+)
+{
+  return priority & ~SCHEDULER_EDF_PRIO_MSB;
+}
+
 Scheduler_Void_or_thread _Scheduler_EDF_Change_priority(
   const Scheduler_Control *scheduler,
   Thread_Control          *the_thread,