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B-1
System Devices Location Map
Appendix B. System Devices Location Map
•
System Units, Cards, Fans, CPU’s, Memory and Sensors
, on page B-2
•
PCI/ISA Busses and Devices
, on page B-4
•
PCI Architecture Flow (I/O Subsystem
), on page B-5.
Each system device is mapped through location codes which identify its physical location
(physical location code) and/or its logical function (AIX location code).
A physical location code is an alphanumeric string of variable length, consisting of a
hierarchical series of device identifier: each device is identified through a path which starts
from the unit including the device and leads to the device itself.
The unit including the device is identified as follows:
• U1.# , where:
– U1 logically identifies a global system configuration (e.g., a configuration including a
base unit and two disk expansion units)
– # physically identifies the unit: 0 base unit, 1 first expansion unit, 2 second expansion
unit.
An example of physical location code follows; it identifies the memory DIMM installed on
memory riser 0, in slot 1:
•
U1.0.P1-M0.1
– U1.0
identifies the system base unit
– P1
identifies the system planar
– M0.1
identifies memory riser 0, connector 1.
The AIX location code is a string in the format AB-CD-EF-GH. AB identifies the bus the
device belongs to, CD identifies the device itself, EF identifies a connector and GH identifies
a port or device. Planars, cards and controllers are identified by AB-CD only. For PCI
controllers, CD is the hexadecimal value of the device identification on the PCI bus
multiplied by 8. For example, the location code of the device installed in PCI slot 5, which is
on PCI bus 0 and has the Dev. ID 7, is:
• 10-38 , where
– 10 identifies PCI bus 0
– 38 is the hexadecimal value of decimal 56 (Dev. ID 7 multiplied by 8).
Aim of the following tables is to provide and correlate the different identifications of each
system device.
The tables list:
• The available devices
• The bus they belong to (for PCI/ISA devices only)
• The device identification (Dev. ID) on the bus (for PCI devices only, not meaningful for
ISA devices)
•
The device node under Open Firmware
•
The device physical location code
•
The AIX location code.
Additional information on the device handling is given in Open Firmware, Identifying
Device Path , in the Maintenance Guide .