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| Transmitting Data from Linux to OF possible ? https://powerdeveloper.org/forums/viewtopic.php?f=7&t=1520 |
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| Author: | judas [ Sat Mar 29, 2008 10:36 am ] |
| Post subject: | Transmitting Data from Linux to OF possible ? |
Hi, Due to an annoyning bug in the OF, the marvell-gigabit interface is not detected correctly on first boot after powercut. Therefore I want to have the system automatically reboot and restart, if linux detects the problem. So I need to set some OF-variable in order to take a different path in the bootmenu ... Is this possible ? |
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| Author: | Neko [ Sat Mar 29, 2008 1:23 pm ] |
| Post subject: | Re: Transmitting Data from Linux to OF possible ? |
Quote: Hi,
No. Linux kills off the firmware client interface so there's no transmitting data back to it UNLESS you hack it into the boot wrapper (or prom_init.c and the ilk). This will effectively allow you to reboot before Linux is really loaded.Due to an annoyning bug in the OF, the marvell-gigabit interface is not detected correctly on first boot after powercut. Therefore I want to have the system automatically reboot and restart, if linux detects the problem. So I need to set some OF-variable in order to take a different path in the bootmenu ... Is this possible ? Actually this would be the perfect place, but of course the Marvell driver is not loaded yet, if you make a mistake, the kernel may simply reboot over and over again :) Therefore, your best bet is to find out what is different about the configuration of the Marvell ethernet and do the check - and the reboot - in a Forth script. This is far safer and doesn't rely on driver loading.. |
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