I upgraded to the new ipipe patch and your uic fix.  Attached is a new patch I needed - without it, I get the error message:

.../include/linux/ipipe.h:298: warning: 'struct mm_struct' declared inside parameter list
.../include/linux/ipipe.h:298: warning: its scope is only this definition or declaration, which is probably not what you want

Also, there is a problem with the uic fix.  It now gives this compile-time error:

  CC      arch/powerpc/sysdev/uic.o
.../arch/powerpc/sysdev/uic.c: In function 'uic_init_one':
.../arch/powerpc/sysdev/uic.c:234: error: incompatible types in assignment

I believe this is caused by the definition in spinlock.h:

# define spin_lock_init(lock)                    \
    do { *(lock) = SPIN_LOCK_UNLOCKED; } while (0)

The SPIN_LOCK_UNLOCKED should perhaps be IPIPE_SPIN_LOCK_UNLOCKED, but I don't know if this is the right way to fix it.

    Steve

Philippe Gerum wrote: 
Steven A. Falco wrote:
  
Thanks!  I'll try your patch and report if I still have trouble.

I've attached my patch for PPC405.

    

Thanks. You may also want to upgrade to this I-pipe patch; it should
apply properly against -rc7:

http://download.gna.org/adeos/patches/v2.6/powerpc/adeos-ipipe-2.6.23-powerpc-DENX-2.0-02.patch

You would still need the quick fix for the UIC on top of that one, though.

  
    Steve

Philippe Gerum wrote:
    
Steven A. Falco wrote:
  
      
I have built a 2.6.23-rc7 kernel (from Denx git) with Xenomai 2.4-rc3. 
Architecture is powerpc, processor is a 405GP.

I had to make some additions to arch/powerpc/kernel/head_40x.S, and I
can submit a patch if someone tells me where to post it.

    
        
Here would be nice, or to the Adeos list, indifferently - I would pick
it from both anyway.

  
      
However, while the kernel boots and runs, the xenomai user apps do not
work correctly.  Specifically, when running cyclictest, I get the following:

    
        
This patch should fix this issue.

diff --git a/arch/powerpc/sysdev/uic.c b/arch/powerpc/sysdev/uic.c
index eeb38e2..5a38086 100644
--- a/arch/powerpc/sysdev/uic.c
+++ b/arch/powerpc/sysdev/uic.c
@@ -48,7 +48,7 @@ struct uic {
 	int index;
 	int dcrbase;

-	spinlock_t lock;
+	ipipe_spinlock_t lock;

 	/* The remapper for this UIC */
 	struct irq_host	*irqhost;
  
      
How do I debug this?  I have done a little kernel hacking, but I am a
noob when it comes to Xenomai...

    
        
Well, actually, it's shame on me. I did not notice that the universal
interrupt controller code was missing some bits in post-2.6.21 I-pipe
patches.