christophe leroy <[email protected]> wrote on 2014/09/18 21:11:01: > > > Le 18/09/2014 20:12, Joakim Tjernlund a écrit : > > leroy christophe <[email protected]> wrote on 2014/09/18 18:42:14: > > > >> Le 18/09/2014 17:15, Joakim Tjernlund a écrit : > >>> Christophe Leroy <[email protected]> wrote on 2014/09/17 > > 18:36:57: > >>>> Exception InstructionAccess does not exist on MPC8xx. No need to > > branch > >>> there from somewhere else. > >>>> Handling can be done directly in InstructionTLBError Exception. > >>>> > >>>> Signed-off-by: Christophe Leroy <[email protected]> > >> . = 0x1200 > >> DataStoreTLBMiss: > >> @@ -477,7 +475,11 @@ DataStoreTLBMiss: > >> */ > >> . = 0x1300 > >> InstructionTLBError: > >> - b InstructionAccess > >> + EXCEPTION_PROLOG > >> + mr r4,r12 > >> + mr r5,r9 > >> + /* 0x400 is InstructionAccess exception, needed by bad_page_fault() > > */ > >> + EXC_XFER_LITE(0x400, handle_page_fault) > > You should have the code in TLBMiss and have the TLBError branch there as > > that is the common case. > As far as I remember, I tried it already but we don't have enough space > in TLBmiss for that. We can only have 40 instructions.
Do your other optimizations first, then you might have space :) Jocke -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
