Appendix C
PCI Cards and Device Mapping
C-3
C.2
Device Map Examples
As shown in the diagrams below, the OpenBoot PROM displays the following parts
in sequence for each PCI card in an External I/O Expansion Unit:
■
The I/O Unit (IOU) slot in the server
■
Multiple devices inside the I/O boat
■
The PCI card in the I/O boat
■
Disk drives, SCSI ports, or networks that connect to the PCI card
C.2.1
Device Map for PCI Express Cards
This is an example of a complete device path for a PCI Express (PCIe) card in a PCI
Express boat:
IOU_slot
is the IOU slot to which the link card for a External I/O Expansion Unit is
connected. See
and
.
shows the device path for a PCI Express card. The device path is the
accumulation of ports from the host data bus (item 1) to the PCI card (item 6).
FIGURE C-1
Device Path for PCI Express (PCIe) PCI Cards
/
IOU_slot
/pci@0/pci@9/pci@0/pci@9/
abc@n
2
3
4
5
6
0
0
9
1
1
0
1
0
0
9
9
PCIe slot 6
PCIe slot 5
PCIe slot 4
PCIe slot 3
PCIe slot 2
PCIe slot 1
1a
1
Summary of Contents for SPARC Enterprise M4000
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