From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <38E3CE55.977E302@cray.com> Date: Thu, 30 Mar 2000 15:59:49 -0600 From: Mike Wolf MIME-Version: 1.0 To: linuxppc-embedded@lists.linuxppc.org Subject: 4xx tlb questions Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Hi, I'm new to kernel development and have a question on the 4xx. Part of the tlb address is 8 bits from the PID register. I cannot find the code that sets the PID register for user code. I find code that sets the PID reg to 0, and I find code that saves the current value of PID reg and then setting it to 0 to do some work and then sets it back. I was expecting to see something in sched.c that set the PID to some value from the task_struct on a context switch. Its not at all obvious to me how the PID is getting set. The only other option I'm aware of is to invalidate the TLB on a context change, but I didnt see that either and the tlb handlers imply something else because they save the current value of the PID register. If it was always 0 it wouldnt need that -- Mike Wolf Cray Research 655-F Lone Oak Drive, Eagan, MN 55121 mwolf@cray.com (651)683-5313 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/