RISCWatch w/ Linux running on ppc405D: Virtual/Physical mem issues

From: Nju Njoroge (njoroge_at_stanford.edu)
Date: 07/29/04

  • Next message: Puneet Goel: "Suggestion needed on Embedded Linux support for my board" 
    Date: 28 Jul 2004 18:59:22 -0700

    Hello,

    I have been using the Riscwatch box w/ RISCwatch ver. 5.1 software. I
    am running Linux on our embedded PPC405D. The trace captures the
    instructions with their virtual addresses. However, when an interrupt
    is detected, the processor uses the physical addresses, at which point
    Riscwatch complains it is "not configured" to read those addresses. I
    suspect that it thinks that the physical address is virtual, so when
    it goes into the TLB and/or page table for the translation, it can't
    find it since there isn't obviously a translation. In other words, I
    think that Riscwatch should switch to real mode instead at that point.
    How can configure RISCwatch to access those interrupt address
    locations that need physical address? Anyone encountered this problem
    and found a way around it? I e-mailed IBM about it, but haven't gotten
    a response yet...

    Thanks,

    NN

  • Next message: Puneet Goel: "Suggestion needed on Embedded Linux support for my board"