diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index ebbf038064..27be15eb9a 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,9 @@
+2008-06-10	Chris Johns <chrisj@rtems.org>
+
+	* score/include/rtems/score/priority.h: Let the CPU define the
+	maximum and minimum priority levels to reduce the amount of memory
+	thread chains use.
+
 2008-06-06	Joel Sherrill <joel.sherrill@oarcorp.com>
 
 	* rtems/include/rtems.h, rtems/include/rtems/rtems/clock.h,
diff --git a/cpukit/score/include/rtems/score/priority.h b/cpukit/score/include/rtems/score/priority.h
index bfe43e282d..86c0e83de6 100644
--- a/cpukit/score/include/rtems/score/priority.h
+++ b/cpukit/score/include/rtems/score/priority.h
@@ -40,6 +40,11 @@
 extern "C" {
 #endif
 
+/*
+ * Processor specific information.
+ */
+#include <rtems/score/cpu.h>
+
 /**
  *  The following type defines the control block used to manage
  *  thread priorities.
@@ -49,9 +54,18 @@ extern "C" {
 typedef uint32_t   Priority_Control;
 
 /** This defines the highest (most important) thread priority. */
+#if defined (CPU_PRIORITY_MINIMUM)
+#define PRIORITY_MINIMUM      CPU_PRIORITY_MINIMUM
+#else
 #define PRIORITY_MINIMUM      0
+#endif
+
 /** This defines the lowest (least important) thread priority. */
+#if defined (CPU_PRIORITY_MAXIMUM)
+#define PRIORITY_MAXIMUM      CPU_PRIORITY_MAXIMUM
+#else
 #define PRIORITY_MAXIMUM      255
+#endif
 
 /**
  *  The following record defines the information associated with