On Sat, Jul 25, 2020 at 9:44 AM Utkarsh Rai <utkarsh.ra...@gmail.com> wrote: > > Hello, > While changing the memory entries for a section in the ARMv7 MMU using > 'arm_cp15_set_translation_table_entries()' I get fatal exception error. On > stepping through the debugger, the exception occurs when invalidating the > data TLB entries, using 'arm_cp15_tlb_data_invalidate_entry()'. > > You can view the relevant snippet here. Interestingly enough, the fatal > exception occurs when I change the memory attribute from READ/WRITE to READ > ONLY. Can someone point out my mistake?
My best guess: The block of memory you pass is in global space. It is not likely to be page aligned. So when you change to read-only, you probably change some other global variables to read-only also, and then something tries to write to them. To see if that is the problem, use the aligned() attribute (we have RTEMS_ALIGNED) with the page size. > _______________________________________________ > devel mailing list > devel@rtems.org > http://lists.rtems.org/mailman/listinfo/devel _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
