Ing.Gianfranco Morandi wrote:

I have a problem during the early initialization of the console; when the board starts from power up the first part of the message is corrupted as follow:

áÙÁááiA¹¹Á¹Í¹Á.сÑå¹áÁÁ5!éé 4 kB I-Cache 4 kB D-Cache FEC present *** Warning: CPU Core has Silicon Bugs -- Check the Errata *** Board: FADS with db MPC821, MPC860 / MPC860SAR / MPC860T rev ENG or PILOT ... ...

while if I reset the board without switch it off, the message is correct.

CPU: XPC860xxZPnnB at 49.800 MHz: 4 kB I-Cache 4 kB D-Cache FEC present *** Warning: CPU Core has Silicon Bugs -- Check the Errata *** Board: FADS with db MPC821, MPC860 / MPC860SAR / MPC860T rev ENG or PILOT ... ...

Does anybody have any idea if or where I missed some stuff ?

The garbled output is because for the FADS the rs232 port is disabled at powerup until U-Boot enables it. It takes a little while for the charge pumps to develop enough voltage to send properly, so the first characters are garbled.

When you reset the board the rs232 ports are left enabled, so the rs232 output works immediately.

You can safely ignore it, or fix it by adding a delay (maybe 50 milliseconds?) after the rs232 port is enabled in cpu/mpc8xx/serial.c. Look for BCSR1_RS232EN_1.

In my experience, what you should fix is this:

CPU: XPC860xxZPnnB at 49.800 MHz: 4 kB I-Cache 4 kB D-Cache FEC present *** Warning: CPU Core has Silicon Bugs -- Check the

The MPC860T rev B silicon has serious problems. You should replace the CPU with a revision D processor. My experience with the FADS was pretty good once I did that, but other people have had lots of problems and really _hate_ it.

Dave

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