Intel CONTROLLERS 413808 - Manual (Page 259)

Intel ® 413808 and 413812 I/O Controllers in TPER Mode
October 2007 Developer’s Manual
Order Number: 317805-001US 259
Address Translation Unit (PCI Express)—Intel
®
413808 and 413812
Standard Messages accepted by SRL as target
ERR_COR
Signal detection of a correctable error
to Root Complex
RC
Log in PCI Express Advanced
Error registers and interrupt the
core via the root interrupt bit in
the ATUISR
ERR_NONFATAL
Signal detection of an uncorrectable
error Root Complex
RC
ERR_FATAL
Signal detection of a fatal error Root
Complex
RC
PM_Active_State_NAK
Rejection of request to enter a low
power state
End
Point
PME_Turn_Off
Notification of pending turn-off of link
clock and power
End
Point
Generate PME_TO_Ack message.
PM_PME
PME message conveying the ID of the
PME originator
RC
Log in requester ID in the Root
Status Register. Interrupt the
core via the Root Complex
interrupt bit in the ATUISR
PME_TO_Ack
c Acknowledge turn-off of link clock and
power
RC
Assert_INTx Assert INTx virtual signal RC
Captured and converted to
signals to Interrupt Controller Deassert_INTx De-assert INTx virtual signal RC
Set_Slot_Power_Limit Set Slot Power Limit in Upstream Port End
Point
Copy payload to Device
Capabilities register and
interrupt the core.
Vendor Defined Message
Type 0/1
Vendor Specific Message. It is used by
devices to communicate with SRL
device core.
RC,
End
Point
Log in Inbound Vendor Message
Register and interrupt the core.
Attention_Indicator_X
These messages are issued by the
root port to change the indicator on
the device
End
Point
Log in the PEMCSR, and
interrupt the core
Power_Indicator_X
These messages are issued by the
root port to change the indicator on
the device
End
Point
Log in the PEMCSR, and
interrupt the core
Attention_Button_Pressed Issued by endpoint when button
pressed on device
RC
Log in Slot Status Register and
interrupt core
a. As a Root Complex, system software never requests SRL to broadcast the
PME_Turn_Off message in preparation for removing the main power and clock
sources. Thus, SRL doesn’t generate this message as a RC. However, for reuse
purpose the Message Unit is capable of generating this message.
b. As an End Point, SRL never generates a PM_PME message to the RC. It means SRL
doesn’t consume AUX power. However, for reuse purpose the Message Unit is
capable of generating this message.
c. SRL doesn’t generate PME_Turn_Off message. Thus it shouldn’t receive
PME_TO_Ack Message. However, for reuse purpose the Message Unit is capable of
accepting this message.
Table 125. Supported Message Types (Sheet 2 of 2)
Message Description/ Comments
RC or
End
Point
Comment