A P P E N D I X F

Sun Ultra 60 UPA/PCI System

This appendix describes some information that is different in this PCI-bus-based system than in an Sbus-based Sun system.

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PCI-Based System

The banner output is as follows, indicating that it is a PCI-based system by showing "UPA/PCI" in banner

Note that the output of show-devs command shows some PCI- based nodes. Also, PCI-based systems use generic names for devices. On-board network is named "network", and internal disks are named " diskn ", n representing the scsi target number for that disk.

Plug in PCI cards with their own FCodePROM may or may not be using generic names. For details on generic names, see Recommended Practices available on homepage for Open Firmware Working Group at:
http://playground.sun.com/1275

The following shows the output of the devalias command on the Sun Ultra 30UPA/PCI system:

When you look at properties for the device node of a PCI device, you will see few properties that are unique to PCI devices and few properties has a different format than that of a SBus device. For example, the output of .properties for a PCI device is:

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Generic Names

The following example shows generic names for devices under /pci@1f,4000/scsi@3 :

The command .speed shows the speed for the processor and busses attached to the system:

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pcia and pcib PCI Busses

The Sun Ultra 60 UPA/PCI system has two PCI busses, pcia & pcib . The probing of slots for those busses are controlled by the following two NVRAM configuration variables.

TABLE F-1

Variable Name	Default value	Description
pcia-probe-list	1,2	Controls probe order of plug-in devices under pcia
pcib-probe-list	3,2,4,5	Controls probe order of plug-in devices under pcib

pcia-probe-list corresponds to devices under /pci@1f,2000 and pcib-probe-list corresponds to devices under /pci@1f,4000 .

pcia supports one plug-in client (slot 1, marked as "PCI 1, 66" ). It can support a device which is 64 bits wide and runs up to 66Mhz. Even though there is no client/slot under pcia corresponding to value 2, 2 is included in pcia-probe-list default value for historical reasons.

pcib supports three plug -in clients (slot 2,4, and 5; marked as "PCI 2", "PCI 3", and "PCI 4" respectively). pcib can support devices which are 64 bits wide and run upto 33Mhz.