OpenBoot 3.x Command Reference Manual

Appendix 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.

PCI-Based System

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

ok banner
Sun Ultra 60 UPA/PCI (UltraSPARC-II 296MHz), No Keyboard
OpenBoot 3.11, 256 MB memory installed, Serial #9241373.
Ethernet address 8:0:20:8d:3:1d, Host ID: 808d031d.

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:

ok show-devs

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

ok devalias
screen                   /SUNW,ffb@1e,0
net                      /pci@1f,4000/network@1,1
disk                     /pci@1f,4000/scsi@3/disk@0,0
cdrom                    /pci@1f,4000/scsi@3/disk@6,0:f
tape                     /pci@1f,4000/scsi@3/tape@4,0
tape1                    /pci@1f,4000/scsi@3/tape@5,0
tape0                    /pci@1f,4000/scsi@3/tape@4,0
disk6                    /pci@1f,4000/scsi@3/disk@6,0
disk5                    /pci@1f,4000/scsi@3/disk@5,0
disk4                    /pci@1f,4000/scsi@3/disk@4,0
disk3                    /pci@1f,4000/scsi@3/disk@3,0
disk2                    /pci@1f,4000/scsi@3/disk@2,0
disk1                    /pci@1f,4000/scsi@3/disk@1,0
disk0                    /pci@1f,4000/scsi@3/disk@0,0
scsi                     /pci@1f,4000/scsi@3
floppy                   /pci@1f,4000/ebus@1/fdthree
ttyb                     /pci@1f,4000/ebus@1/se:b
ttya                     /pci@1f,4000/ebus@1/se:a
keyboard!                /pci@1f,4000/ebus@1/su@14,3083f8:forcemode
keyboard                 /pci@1f,4000/ebus@1/su@14,3083f8
mouse                    /pci@1f,4000/ebus@1/su@14,3062f8
name                     aliases

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:

ok cd /pci@1f,4000/scsi@3
ok .properties
assigned-addresses       81001810 00000000 00000400 00000000 00000100 
                         82001814 00000000 00010000 00000000 00000100 
                         82001818 00000000 00011000 00000000 00001000 
device_type              scsi-2
clock-frequency          02625a00 
reg                      00001800 00000000 00000000 00000000 00000000 
                         01001810 00000000 00000000 00000000 00000100 
                         02001814 00000000 00000000 00000000 00000100 
                         02001818 00000000 00000000 00000000 00001000 
model                    Symbios,53C875
compatible               glm
name                     scsi
devsel-speed             00000001 
class-code               00010000 
interrupts               00000001 
max-latency              00000040 
min-grant                00000011 
revision-id              00000014 
device-id                0000000f 
vendor-id                00001000

Generic Names

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

ok ls
f007ae2c tape
f00797f4 disk

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

ok .speed
CPU  Speed : 296.00MHz
UPA  Speed : 098.66MHz
PCI  Bus A : 66Mhz
PCI  Bus B : 33Mhz

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 




Controls probe order of plug-in devices under pcia



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.