Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

231

A root port can handle interrupts and events from an endpoint device. A root port also 

generates its own interrupts for some events, including power management events, but 

also including error events.

A root port receives two interrupt types from an endpoint device: INTx (legacy) and 

MSI. MSIs are automatically passed upstream by the root port, just as other memory 

writes are passed. INTx messages are delivered to the legacy block interrupt router/

controller by the root port.

Events and interrupts that are handled by the root port are shown with the interrupts 

they deliver to the interrupt decoder/router.

 lists the interrupts and events generated based on packets received, or 

events generated in the root port. Configuration is needed by the software to enable 

the different interrupts as applicable.

When INTx interrupts are received by an end point, they are mapped to the interrupts 

shown in 

 and sent to the interrupt decoder/router in the Intel SoC legacy 

block.

Interrupts generated from events within the root port are not swizzled.

INTx

Packet

X

X

PM_PME

Packet

X

X

Power Management (PM)

Event

X

X

X

X

ERR_CORR

Packet

X

ERR_NONFATAL

Packet

X

ERR_FATAL

Packet

X

Internal Error

Event

X

VDM

Packet

X

Root Port 1

INTA#

INTB#

INTC#

INTD#

Root Port 2

INTD#

INTA#

INTB#

INTC#

Root Port 3

INTC#

INTD#

INTA#

INTB#

Root Port 4

INTB#

INTC#

INTD#

INTA#