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
87
Processor Configuration Registers
6.2.4
PCISTS6 - PCI Status
B/D/F/Type:
0/6/0/PCI
Address Offset:
6-7h
Default Value:
0010h
Access:
RO; RWC
Size:
16 bits
This register reports the occurrence of error conditions associated with primary side of
the “virtual” Host-PCI Express bridge embedded within the processor.
Table 27. PCISTS6 - PCI Status Register (Sheet 1 of 2)
Bit
Access
Default
Value
RST/
PWR
Description
15
RO
0b
Core
Detected Parity Error (DPE)
Not Applicable or Implemented. Hard wired to 0. Parity
(generating poisoned TLPs) is not supported on the primary side
of this device (we don't do error forwarding).
14
RWC
0b
Core
Signaled System Error (SSE)
This bit is set when this Device sends an SERR due to detecting
an ERR_FATAL or ERR_NONFATAL condition and the SERR Enable
bit in the Command register is 1. Both received (if enabled by
BCTRL6[1]) and internally detected error messages do not affect
this field.
13
RO
0b
Core
Received Master Abort Status (RMAS)
Not Applicable or Implemented. Hard wired to 0. The concept of a
master abort does not exist on primary side of this device.
12
RO
0b
Core
Received Target Abort Status (RTAS)
Not Applicable or Implemented. Hard wired to 0. The concept of a
target abort does not exist on primary side of this device.
11
RO
0b
Core
Signaled Target Abort Status (STAS)
Not Applicable or Implemented. Hard wired to 0. The concept of a
target abort does not exist on primary side of this device.
10:9
RO
00b
Core
DEVSELB Timing (DEVT)
This device is not the subtractively decoded device on bus 0. This
bit field is therefore hard wired to 00 to indicate that the device
uses the fastest possible decode.
8
RO
0b
Core
Master Data Parity Error (PMDPE)
Because the primary side of the PCIe graphic's virtual P2P bridge
is integrated with the PROCESSOR functionality there is no
scenario where this bit will get set. Because hardware will never
set this bit, it is impossible for software to have an opportunity to
clear this bit or otherwise test that it is implemented. The
PCI
Local Bus Specification
defines it as a R/WC, but for our
implementation an RO definition behaves the same way and will
meet all Microsoft testing requirements.
This bit can only be set when the Parity Error Enable bit in the PCI
Command register is set.
7
RO
0b
Core
Fast Back-to-Back (FB2B)
Not Applicable or Implemented. Hard wired to 0.
6
RO
0b
Core
Reserved