Board Manual 69
External RAID Section 4

The IQ80321 provides the capability for the user to develop RAID applications. There is a

requirement to provide the ability of makin g the secondary PCI-X devices private and the a bility to

route the interrupt lines. The following requi rements describe this capability.

4.1 Private Device Configuration

The devices on the SPCI-X bus (Expansion Slot and Intel® 82544 Gigabit Ethernet Controller) are

configured as private devices based on Tabl e 86 requirements.

Table 86. Private Device Configuration Requirements

Description
The Secondary PCI- X Expansion slot is c onfigured as private by either the Intel ® 80321 I/O processor (Us in g a
GPIO pin) or IBM PCI-X Bridge .
The Intel® 82544 Gigabit Ethernet Co nt rol le r is conf ig ur ed as pr i va te by ei th er t he 80 32 1 (U sing a GP I O pi n) o r
IBM PCI-X Bridge.
The device configuration scheme is based on Figure 17.

Figure 17. IDSEL Routing for Private Device Configuration

A9459-02
Intel® 80321
I/O Processor
SPCI-X Slot
Intel® 82544
Gigabit Ethernet
GPIO IDSEL_EN_PCIX1
GBE_IDSEL
PCIX_IDSEL
IDSEL
S-Ad Line 24
S-Ad Line 18
S-Ad Line 20
S-Ad Line 22
GPIO IDSEL_EN_GBE
Private Space Public Space IDSEL_REROUTE_EN
U3D1
U3D1
PCI-X
Bridge
S-Ad Line 28
Dip Switch
S4D1
Dip Switch
S8E1-7
DipSwitch
S7E1