Intel
®
Core
TM
i7-620LE/UE, i7-610E, i5-520E and Intel
®
Celeron
®
Processor P4500, P4505 Series
April 2010
Datasheet Addendum
Document Number: 323178-002
113
Processor Configuration Registers
6.2.36
DCTL - Device Control
B/D/F/Type:
0/6/0/PCI
Address Offset:
A8-A9h
Default Value:
0000h
Access:
RO; RW
Size:
16 bits
Provides control for PCI Express device specific capabilities.
The error reporting enable bits are in reference to errors detected by this device, not
error messages received across the link. The reporting of error messages (ERR_CORR,
ERR_NONFATAL, ERR_FATAL) received by Root Port is controlled exclusively by Root
Port Command Register.
Table 59. DCTL - Device Control Register (Sheet 1 of 2)
Bit
Access
Default
Value
RST/
PWR
Description
15
RO
0h
Core
Reserved
14:12
RO
000b
Core
Reserved for Max Read Request Size (MRRS)
11
RO
0b
Core
Reserved for Enable No Snoop (RSVD)
10
RO
0b
Core
Reserved
Reserved for Auxiliary (AUX) PM Enable ()
9
RO
0b
Core
Reserved
Reserved for Phantom Functions Enable ()
8
RO
0b
Core
Reserved
Reserved for Extended Tag Field Enable ()
7:5
RW
000b
Core
Max Payload Size (MPS)
000:128B max supported payload for Transaction Layer Packets
(TLP). As a receiver, the Device must handle TLPs as large as the
set value; as transmitter, the Device must not generate TLPs
exceeding the set value.
All other encodings are reserved.
Hardware will actually ignore this field. It is writeable only to
support compliance testing.
4
RO
0b
Core
Reserved for Enable Relaxed Ordering (RSVD)
3
RW
0b
Core
Unsupported Request Reporting Enable (URRE)
When set, allows signaling ERR_NONFATAL, ERR_FATAL, or
ERR_CORR to the Root Control register when detecting an
unmasked Unsupported Request (UR). An ERR_CORR is signaled
when an unmasked Advisory Non-Fatal UR is received. An
ERR_FATAL or ERR_NONFATAL is sent to the Root Control register
when an uncorrectable non-Advisory UR is received with the
severity bit set in the Uncorrectable Error Severity register.
2
RW
0b
Core
Fatal Error Reporting Enable (FERE)
When set, enables signaling of ERR_FATAL to the Root Control
register due to internally detected errors or error messages
received across the link. Other bits also control the full scope of
related error reporting.