Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Integrated I/O (IIO) Configuration Registers
236
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
14.2.52 ROOTCAP
PCI Express Root Capabilities.
14.2.53 ROOTSTS
PCI Express Root Status.
Type:
CFG
PortID:
N/A
Bus:
0
Device:
0Function:0 (PCIe* Mode)
Bus:
0
Device:
2Function:0-3
Bus:
0
Device:
3Function:0-3
Offset:
0xae
Bit
Attr
Default
Description
15:1
RV
-
Reserved.
0:0
RO
RW_O (Device 0 
Function 0)
0x1
0x0 (Device 0 
Function 0)
crs_software_visibility:
This bit, when set, indicates that the Root Port is capable of 
returning Configuration Request Retry Status (CRS) Completion 
Status to software. Intel Xeon processor E7-2800/4800/8800 v2 
product family Product Family supports this capability.
Type:
CFG
PortID:
N/A
Bus:
0
Device:
0Function:0 (PCIe* Mode)
Bus:
0
Device:
2Function:0-3
Bus:
0
Device:
3Function:0-3
Offset:
0xb0
Bit
Attr
Default
Description
31:18
RV
-
Reserved.
17:17
RO_V
0x0
pme_pending:
This field indicates that another PME is pending when the PME Status bit is 
set. When the PME Status bit is cleared by software; the pending PME is 
delivered by hardware by setting the PME Status bit again and updating the 
Requestor ID appropriately. The PME pending bit is cleared by hardware if no 
more PMEs are pending.
16:16
RW1C
0x0
pme_status:
This field indicates a PM_PME message (either from the link or internally from 
within that root port) was received at the port.
1: PME was asserted by a requester as indicated by the PME Requester ID 
field
This bit is cleared by software by writing a '1'. Note that the root port itself 
could be the source of a PME event when a hotplug event is observed when 
the port is in D3hot state.
15:0
RO_V
0x0
pme_requester_id:
This field indicates the PCI requester ID of the last PME requestor. If the root 
port itself was the source of the (virtual) PME message, then a RequesterID 
of CPUBUSNO0:DevNo:FunctionNo is logged in this field.
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