>> > >> I think the cause is clear now. But how to fix it? Two questions: >> > >> 2. If the DTLB miss exception handler is not the right guy to load a >> > >> proper TLB entry, how can I set one entry based on the link_address >> > >> and the address of the flat dt blob? >> > > >> > > Given how early in the boot process it is, it's probably going to need >> > > to be handled specially. >> > >> > What APIs can I use to set up DTLBs? >> >> I don't think there is one that works on 8xx. You'll could hack up >> initial_mmu, or else write some C code to insert an 8xx TLB entry. > > Yup, I think he just ends up getting out of the initial mapping which is > smallish on 8xx, no ? Might be worth sticking in one more entry during > boot...
If CONFIG_PIN_TLB is on, two more entries are pinned down, which gives 16MB mappings. Just curious. Why is there only one entry by default? what's the trade-off to pin down all 4 entries? THanks, -Shawn. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
