On Thu, 2008-08-21 at 10:23 +0200, Sébastien Chrétien wrote: > Exactly, I mean ppc_md.init_IRQ(). > Ok. What have I to setup in this function ? I set the mask and other > registers. Is it right ? How do I chose the mask ? It totally depends on your platform, I really can't tell you. You can look at similar platform code if there is some, otherwise the reference manual for your hardware or similar should have what you need. > At the end of this funtion, IRQ are disable. Is that right ? So who > does enable IRQs ? Yes, irqs get enabled a bit later in start_kernel(). cheers -- Michael Ellerman OzLabs, IBM Australia Development Lab wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183) We do not inherit the earth from our ancestors, we borrow it from our children. - S.M.A.R.T Person