Vc0Rctl - Vc0 Resource Control - Intel I5-520E - DATASHEET ADDENDUM Datasheet

Table 77. VC0RCAP - VC0 Resource Capability (Sheet 2 of 2)
Bit Access
22:16 RO
15 RO
14:8 RO
7:0 RO
6.3.6

VC0RCTL - VC0 Resource Control

B/D/F/Type:
Address Offset:
Default Value:
Access:
Size:
Controls the resources associated with PCI Express Virtual Channel 0.
® TM
Intel Core i7-620LE/UE, i7-610E, i5-520E and Intel
Datasheet Addendum
136
Default
RST/PWR
Value
00h Core
0b Core
00h Core
01h Core
®
Celeron
Description
Reserved for Maximum Time Slots
Reject Snoop Transactions (RSNPT):
Reject Snoop Transactions (RSNPT):
0: Transactions with or without the No Snoop bit set within
the TLP header are allowed on this VC.
1: When Set, any transaction for which the No Snoop
attribute is applicable but is not Set within the TLP Header
is rejected as an Unsupported Request
Reserved
Port Arbitration Capability (PAC)
Port Arbitration Capability – Indicates types of Port
Arbitration supported by the VC resource. This field is valid
for all Switch Ports, Root Ports that support peer-to to-
peer traffic, and RCRBs, but not for PCI Express Endpoint
devices or Root Ports that do not support peer to peer
traffic. Each bit location within this field corresponds to a
Port Arbitration Capability defined below. When more than
one bit in this field is Set, it indicates that the VC resource
can be configured to provide different arbitration services.
Software selects among these capabilities by writing to the
Port Arbitration Select field (see below). Defined bit
positions are:
Bit 0 Non-configurable hardware-fixed arbitration scheme,
e.g., Round Robin (RR)
Bit 1 Weighted Round Robin (WRR) arbitration with 32
phases
Bit 2 WRR arbitration with 64 phases
Bit 3 WRR arbitration with 128 phases
Bit 4 Time-based WRR with 128 phases
Bit 5 WRR arbitration with 256 phases
Bits 6-7 Reserved MCH default indicates "Non-configurable
hardware-fixed arbitration scheme".
0/6/0/MMR
114-117h
800000FFh
RO; RW;
32 bits
®
Processor P4500, P4505 Series
Processor Configuration Registers
April 2010
Document Number: 323178-002