How can I control probing of pci slots on my Sun Ultra-30 UPA/PCI system?
On Sun Ultra-30 UPA/PCI system, there are NVRAM variables which indicate to CPU PROM which slots to probe and in what order during normal system initialization. On Sun Ultra-30 UPA/PCI system they are: pcia-probe-list and pcib-probe-list. The default value for pcia-probe-list is 1,2 and the default value for pcib-probe-list is 5,4,3,2 . If you don’t want slot 4 on pcib probed during normal initialization (which occurs after a reset), change pcib-probe-list as follows: ok setenv pcib-probe-list 5,3,2 Then later, after a reset, if you wanted to probe slot 4 on pcib manually, you could run the following command: ok 4 probe-pci-slot /pci@1f,4000 Note that not all CPU PROMs have the above command. Also, in future PROMs, the behavior of the above command may change, including complete disappearance of the command.
