Intel B940 Datasheet download pdf (Page 215)

Datasheet, Volume 2 215

Processor Configuration Registers

2.15.31 VTCMPLRESR—VT Completion Resource Dedication

This register provides a programmable interface to dedicate the DMI Completion

Tracking Queue resources to DMI VC0 Read, DMI VC0 Write, DMI VC1 and DMI VCp VT

fetch and PEG Completion Tracking Queue resources to PEG VC0 read and PEG VC0

write VT fetch.

B/D/F/Type: 0/0/0/VC0PREMAP

Address Offset: F00–F03h

Reset Value: 00060000h

Access: RW-L, RO

Bit Attr

Reset

Value

Description

31:20 RW-L 000h Reserved

19:16 RO 6h

DMI VT Completion Tracking Queue Resource Available

(DMIVTCTRA)

Number of entries available in DMI VT Completion Tracking Queue. 1-based.

The values programmed in the fields below must not be greater than the

value advertised in this field.

15:12 RW-L 0h

DMI VC1 VT Completion Tracking Queue Resource Threshold

(DMIVC1CTQRT)

This field provides a 1-based minimum threshold value used to throttle DMI

VC1 VT fetch. When the number of free DMI VT Completion Tracking Queue

entries equals or falls below the value programmed in this field, DMI VC1 VT

fetch is throttled until the number of free DMI Completion Tracking Queue

entries rise above this threshold. For example:

0000 = Throttle DMI VC1 VT Fetch when there is no entry left.

0001 = Throttle DMI VC1 VT Fetch when there is 1 or less entry left.

0010 = Throttle DMI VC1 VT Fetch when there is 2 or less entry left.

0011 = Throttle DMI VC1 VT Fetch when there is 3 or less entry left.

0100 = Throttle DMI VC1 VT Fetch when there is 4 or less entry left.

0101–1111 = Reserved.

11:8 RW-L 0h

DMI VCp VT Completion Tracking Queue Resource Threshold

(DMIVCPCTQRT)

This field provides a 1-based minimum threshold value used to throttle DMI

VCp VT fetch. When the number of free DMI VT Completion Tracking Queue

entries equals or falls below the value programmed in this field, DMI VCp VT

fetch is throttled until the number of free DMI Completion Tracking Queue

entries rise above this threshold. For example:

0000 = Throttle DMI VCp VT Fetch when there is no entry left.

0001 = Throttle DMI VCp VT Fetch when there is 1 or less entry left.

0010 = Throttle DMI VCp VT Fetch when there is 2 or less entry left.

0011 = Throttle DMI VCp VT Fetch when there is 3 or less entry left.

0100 = Throttle DMI VCp VT Fetch when there is 4 or less entry left.

0101–1111 = Reserved.

7:4 RW-L 0h

DMI VC0 Write VT Completion Tracking Queue Resource Threshold

(DMIVC0WRCTQRT)

This field provides a 1-based minimum threshold value used to throttle DMI

VC0 Write VT fetch. When the number of free DMI VT Completion Tracking

Queue entries equals or falls below the value programmed in this field, DMI

VC0 Write VT fetch is throttled until the number of free DMI Completion

Tracking Queue entries rise above this threshold. For example:

0000 = Throttle DMI VC0 Write VT Fetch when there is no entry left.

0001 = Throttle DMI VC0 Write VT Fetch when there is 1 or less entry left.

0010 = Throttle DMI VC0 Write VT Fetch when there is 2 or less entry left.

0011 = Throttle DMI VC0 Write VT Fetch when there is 3 or less entry left.

0100 = Throttle DMI VC0 Write VT Fetch when there is 4 or less entry left.

0101– 1111 = Reserved.

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Intel B940 Datasheet Page 215

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