2012/9/20 Nikolay Golikov decaprox@gmail.com:
2012/9/20 Adam Lackorzynski adam@os.inf.tu-dresden.de:
On Thu Sep 20, 2012 at 15:25:54 +0400, Nikolay Golikov wrote:
2012/9/20 Adam Lackorzynski adam@os.inf.tu-dresden.de:
On Wed Sep 19, 2012 at 17:41:01 +0400, Nikolay Golikov wrote:
Now I have another problem: I map aipstz-1 registers with l4io_request_iomem(base, AISPTZ_SIZE, L4IO_MEM_NONCACHED, &_vbase); (base = 0x53F00000, AISPTZ_SIZE = 0x4000) It return 0.
But when I try to write to mapped registers my program stopping: *((volatile l4_umword_t *)(_vbase + reg)) = val (reg = 0x0, val = 0x77777777)
Could you check whether it page-faults permanently? (Enable page-fault logging in jdb: P*, let it go, then check trace-buffer via shift-T.) Also try using l4_mem_write as it could be that writing from userspace does not work.
Yes, It's page-faults permanently. In tracebuffer I see:
pf: 0044 pfa=00003000 ip=01000294 (Wp) spc=0xf12e4690 79598 pf: 0044 pfa=00003000 ip=01000294 (Wp) spc=0xf12e4690 79597 pf: 0044 pfa=00003000 ip=01000294 (Wp) spc=0xf12e4690 79596
why it happening?
Device may only be written/read from secure privileged mode, this is one of them (I think). Please try writing/reading via l4_mem_write and l4_mem_read.
Adam
Adam adam@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/
I tried use l4_mem_write for write 0x77777777, it looks ok. But, when I tried l4_mem_read for read from same register it returns 0x0. But similar code injected to bootstrap startup function works fine.
I tried use l4_mem_write for write 0x77777777, it looks ok. But, when I tried l4_mem_read for read from same register it returns 0x0. But similar code injected to bootstrap startup function works fine.