Intel B940 Datasheet download pdf (Page 217)

Datasheet, Volume 2 217

Processor Configuration Registers

2.15.33 PEGVTCMPLRESR—PEG VT Completion Resource

Dedication

This register provides a programmable interface to dedicate the PEG0 and PEG1

Completion Tracking Queue resources to PEG0 VC0 read, PEG0 VC0 write, PEG1 VC0

read and PEG1 VC0 write VT fetch.

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

Address Offset: F08–F0Bh

Reset Value: 20004000h

Access: RW-L, RO

Bit Attr

Reset

Value

Description

31:30 RW-L 00b

PEG Completion Tracking Queue Resource Sharing Mode (PCTQRSM)

11 = PEG1 and PEG0 will each be assigned half of the resources in the

Completion Tracking Queue.

10 = PEG1 will be assigned all of the resources in the Completion Tracking

Queue.

01 = PEG0 will be assigned all of the resources in the Completion Tracking

Queue.

00 = See below for more description for this encoding:

If both Device 1 and Device 6 are enabled, PEG1 and PEG0 will each be

assigned half of the resources in the Completion Tracking Queue. If Device 6

is enabled and Device 1 is disabled, PEG1 will be assigned all of the resources

in the Completion Tracking Queue. If Device 1 is enabled and Device 6 is

disabled, PEG0 will be assigned all of the resources in the Completion

Tracking Queue. If both Device 1 and Device 6 are disabled, PEG1 and PEG0

will each be assigned half of the resources in the Completion Tracking Queue.

29:25 RO 10000b

PEG1 VT Completion Tracking Queue Resource Available

(PEG1VTCTRA)

Number of entries available in PEG1 VT Completion Tracking Queue. 1-based.

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

value advertised in this field.

Note: If device 1 is disabled, the default is 10000b; otherwise, it is 01000b.

This is a status bit.

24:20 RW-L 00000b

PEG1 VC0 Write VT Completion Tracking Queue Resource Threshold

(PEG1VC0WRCTQRT)

This field provides a 1-based minimum threshold value used to throttle PEG1

VC0 Write VT fetch. When the number of free PEG1 VT Completion Tracking

Queue entries equals or falls below the value programmed in this field, PEG1

VC0 Write VT fetch is throttled until the number of free PEG1 Completion

Tracking Queue entries rise above this threshold. For example:

00000 = Throttle PEG1 VC0 Write VT Fetch when there is no entry left.

00001 = Throttle PEG1 VC0 Write VT Fetch when there is 1 or less entry left.

00010 = Throttle PEG1 VC0 Write VT Fetch when there is 2 or less entry left.

00011 = Throttle PEG1 VC0 Write VT Fetch when there is 3 or less entry left.

00100 = Throttle PEG1 VC0 Write VT Fetch when there is 4 or less entry left.

19:15 RW-L 00000b

PEG1 VC0 Read VT Completion Tracking Queue Resource Threshold

(PEG1VC0RDCTQRTCT)

This field provides a 1-based minimum threshold value used to throttle PEG1

VC0 Read VT fetch. When the number of free PEG1 VT Completion Tracking

Queue entries equals or falls below the value programmed in this field, PEG1

VC0 Read VT fetch is throttled until the number of free PEG1 Completion

Tracking Queue entries rise above this threshold. For example:

00000 = Throttle PEG1 VC0 Read VT Fetch when there is no entry left.

00001 = Throttle PEG1 VC0 Read VT Fetch when there is 1 or less entry left.

00010 =Throttle PEG1 VC0 Read VT Fetch when there is 2 or less entry left.

00011 =Throttle PEG1 VC0 Read VT Fetch when there is 3 or less entry left.

00100 =Throttle PEG1 VC0 Read VT Fetch when there is 4 or less entry left.

1 2 ... 212 213 214 215 216 217 218 219 220 221 222 ... 359 360

Comments to this Manuals

No comments

Intel B940 Datasheet Page 217

Comments to this Manuals

Related products and manuals for Processors Intel B940