Wouldn't software interrupts be needed to call code to switch to a supervisor mode when needed? I _am_ rather new to ARM and such but it's my educated guess atm based on our other big CPU. I fear major complication from it.
  ----- Original Message -----
  From: Antonius Hellmann
  To: Rockbox development
  Sent: Wednesday, May 09, 2007 2:03 AM
  Subject: PPs running in supervisor mode

  One idea, why we have these troubles with interrupt handling on the PP devices is, that probably the supervisor mode has some issues with interrupt switching? I understand, that the supervisor mode makes it easy to do register manipulations. But it might be more safe to run the rockbox application code in user mode.
Received on 2007-05-09