Hello,
I have a few rock64s running NetBSD-9. I'm trying to migrate them from microSD
cards to eMMC, and apparently the rock64 u-boot isn't able to write its
environment to eMMC.
That's unfortunate, because the rock64 doesn't have a unique per-board MAC
address. If the MAC address isn't explicitly set in the u-boot environment,
all boards will use 9e:6b:01:38:f7:da.
Attempting to override the MAC address via ifconfig's 'link <address> active'
kills the awge interface completely.
I'm planning on untangling that issue, as well as the u-boot issue, but in the
meantime I need to get these boards running with unique MAC addresses.
I see this bit in sys/dev/ic/dwc_gmac.c:
prop_data_t ea = dict ? prop_dictionary_get(dict, "mac-address") : NULL;
if (ea != NULL) {
/*
* If the MAC address is overriden by a device property,
* use that.
*/
KASSERT(prop_object_type(ea) == PROP_TYPE_DATA);
KASSERT(prop_data_size(ea) == ETHER_ADDR_LEN);
memcpy(enaddr, prop_data_data_nocopy(ea), ETHER_ADDR_LEN);
}
... which leads me to believe that there's a way to specify the MAC address via
a property dictionary.
However, I haven't been able to find any documentation on where that is
actually configured. Adding various permutations of mac-address to
/boot/{cmdline,config}.txt hasn't worked.
Does this need to be done via a custom .dtb, or an option in a custom kernel,
or other?
A clue-by-four would be greatly appreciated,
--
-- Chris
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