Stuart thanks for your rapid followup. Indeed, your hint about modifying the reset function fixed the 'reboot' funtion (see below) - great! Implicitely this also confirms that the CPU on the Nokia plattform is very likely not an SC1100/1200 but some other (earlier) Geode processor.
On 9/17/06, Stuart Henderson <[EMAIL PROTECTED]> wrote:
Some other Geode-based systems use separate components for these. The watchdog is presumably in the parts of the SC1100 other than the CPU. If your board has a watchdog at all, it's not likely to emulate the SC1100 watchdog.
Unfortunately, cooling fins are glued on top of the BGA-housing of the processor in the Nokia plattform. Therefore, unlike with WRAP plattforms, the chip designation of the Geode remains hidden. Some reports hint that it could be the GX1, which was a predecessor of the SC1100 family. While the latter has an on-chip hardware watchdog according to its manual, the predecessor is apparently not. However, it is likely that the Geode I/O co-processor CS5530A includes a programmable watchdog timer - I will check that if I can get access to the datasheet (downloading datasheets from AMD is no so straightforward anymore as it used to be...). A quick survey of all other chips showed that there is no watchdog (LM2636M, CY2292SL, HIN211, Flash with BIOS-E from Insyde Software).
Reboot may be easier. Looking at /usr/src/sys/arch/i386/i386/machdep.c, there's a Geode-specific reset operation used, ... ... you can try editing this file and commenting-out "cpuresetfn = natsem6x86_cpureset;" from natsem6x86_cpu_setup() and rebuilding the kernel; this way it will use the normal PC methods instead. If this does the trick, the outl/outb are probably hanging your system, in which case the natsem6x86_cpu_setup needs to do additional CPU detection and only use the alternative reset function on SC1100 systems.
As recommended, I comment out the two 'outb' statements in the Geode-specific reset function and built a fresh kernel which now reboots flawlessly :-) Now, I will try to figure out and contribute a clean patch that discriminates the Nokia from other Geode plattform like WRAP and Soekris. I am glad my two Nokia IP120 will get a second, long life as Internet firewall & routing gateway cluster under OpenBSD :-) Thanks, Rolf
