Processor Configuration Registers
Intel
®
Core
TM
i7-620LE/UE, i7-610E, i5-520E and Intel
®
Celeron
®
Processor P4500, P4505 Series
Datasheet Addendum
April 2010
128
Document Number: 323178-002
6.2.44
RCTL - Root Control
B/D/F/Type:
0/6/0/PCI
Address Offset:
BC-BDh
Default Value:
0000h
Access:
RO; RW
Size:
16 bits
Allows control of PCI Express Root Complex specific parameters. The system error
control bits in this register determine if corresponding SERRs are generated when our
device detects an error (reported in this device's Device Status register) or when an
error message is received across the link. Reporting of SERR as controlled by these bits
takes precedence over the SERR Enable in the PCI Command Register.
Table 67. RCTL - Root Control Register
Bit
Access
Default
Value
RST/
PWR
Description
15:5
RO
000h
Core
Reserved
4
RO
0b
Core
Reserved for CRS Software Visibility Enable (CSVE)
This bit, when set, enables the Root Port to return
Configuration Request Retry Status (CRS) Completion Status
to software.
Root Ports that do not implement this capability must hardwire
this bit to 0b.
3
RW
0b
Core
PME Interrupt Enable (PMEIE)
0 = No interrupts are generated as a result of receiving PME
messages.
1 = Enables interrupt generation upon receipt of a PME
message as reflected in the PME Status bit of the Root
Status Register. A PME interrupt is also generated if the
PME Status bit of the Root Status Register is set when this
bit is set from a cleared state.
2
RW
0b
Core
System Error on Fatal Error Enable (SEFEE)
0 = Controls the Root Complex's response to fatal errors.No
SERR generated on receipt of fatal error.
1 = Indicates that an SERR should be generated if a fatal error
is reported by any of the devices in the hierarchy
associated with this Root Port, or by the Root Port itself.
1
RW
0b
Core
System Error on Non-Fatal Uncorrectable Error Enable
(SENFUEE)
Controls the Root Complex's response to non-fatal errors.
0 = No SERR generated on receipt of non-fatal error.
1 = Indicates that an SERR should be generated if a non-fatal
error is reported by any of the devices in the hierarchy
associated with this Root Port, or by the Root Port itself.
0
RW
0b
Core
System Error on Correctable Error Enable (SECEE)
Controls the Root Complex's response to correctable errors.
0 = No SERR generated on receipt of correctable error.
1 = Indicates that an SERR should be generated if a
correctable error is reported by any of the devices in the
hierarchy associated with this Root Port, or by the Root
Port itself.