MSR bits in irq_asm.S

Sebastian Huber sebastian.huber at
Wed Jan 13 13:13:40 UTC 2010


on PowerPC the file irq_asm.S is obsolete.  Please have a look at


for the latest exception handling code.


Leon Pollak wrote:
> Hello, all.
> I passed through all PPC irq_asm.S files and seems to see the same picture: 
> while exiting the IRQ state assembler code "restores" the MSR value ALWAYS in 
> the constant way - without taking into account whether caches are on or off.
> Well, this is OK for some specific BSP, which initializes its cache states 
> (although I should do this different).
> But this method is used in ../shared/irq_asm.S too.
> This makes me to thing, that I misunderstand something.
> Thanks for clarification...:-)

Sebastian Huber, embedded brains GmbH

Address : Obere Lagerstr. 30, D-82178 Puchheim, Germany
Phone   : +49 89 18 90 80 79-6
Fax     : +49 89 18 90 80 79-9
E-Mail  : sebastian.huber at
PGP     : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.

More information about the users mailing list