Optional CPU dependent _Per_CPU_Information attributes

[Sebastian Huber]

I would like to add optional CPU dependent _Per_CPU_Information attributes:

Index: score/include/rtems/score/percpu.h
===================================================================
RCS file: /usr1/CVS/rtems/cpukit/score/include/rtems/score/percpu.h,v
retrieving revision 1.12
diff -u -r1.12 percpu.h
--- score/include/rtems/score/percpu.h 15 Jul 2011 14:36:37 -0000 1.12
+++ score/include/rtems/score/percpu.h 16 Aug 2011 11:42:19 -0000
@@ -216,7 +216,8 @@

*

• This is an array of per CPU core information. */

-extern Per_CPU_Control _Per_CPU_Information[];
+extern CPU_PER_CPU_INFORMATION_ATTRIBUTES Per_CPU_Control
+ _Per_CPU_Information[];

#if defined(RTEMS_SMP)
/

This allows to place the _Per_CPU_Information table into special memory regions e.g. the small data area. On some CPUs this can lead to slightly optimized load and store instructions.

This define should be placed into <rtems/score/cpu.h>. The default is undefined.

Example:

#define CPU_PER_CPU_INFORMATION_ATTRIBUTES attribute((section(".sdata")))

[Sebastian Huber]

Committed change above.

[Gedare Bloom]

Replace Version=HEAD with Version=4.11 for the tickets with Milestone >= 4.11