[Qemu-discuss] Cortex A9 MMU enabling and processor hangs

[mar.krzeminski]

Hi all,

It is my first post here, and first question.
I am creating new hw board wirt cortex a-9 CPU.
I have code in my SPL:

  asm volatile ("mrc p15, 0, %0, c1, c0, 0" : "=r" (a) : ); // Read SCTLR
  a = a | (1 << 2) | (1 << 0);
  asm volatile ("mcr p15, 0, %0, c1, c0, 0" : : "r" (a)); // Write SCTLR

After writing to SCTLR cpu seems to hangs. On real hardware this code works.
My question is how can I debug what is wrong in here?

Regards,
Marcin