Register Descriptions

0Event 0 Input

This bit is fed an input into Event 0 logic. This bit is OR’ed with any other logic generating Event 0, guaranteeing that if this bit is set, then Event 0 will be asserted.

2.5.4.4AGP_PMC_[0,1]: AGP Performance Monitor Configuration Register

Function Number:

BFN+1

 

 

Address Offset:

ECh, F0h

Size:

32 bits

Default Value:

000000h

Attribute:

Read/Write

Sticky:

No

Locked:

No

The AGP_G_PMC Register specifies the configuration of the GXB AGP Performance Monitor. This includes specifying Event Selection, Unit Mask, Enable & Disable Source and Reload Control.

Bits Description

31:24 ’n’ for threshold Monitoring

23:20 reserved(0).

19:18 Events to monitor, when Event Select Code points to events. Data Transfer is one

QW (8 bytes). Used also for code 11 0000 00 - All events

01 - Events with ’n’ Data Transfer Cycles

02 - Events with < ’n’ Data Transfer Cycles

03 - Events with > ’n’ Data Transfer Cycles

17:16 Pipe or Sideband Request Mask

00b reserved.

01b Selects Low Priority.

10b Selects High Priority.

11b Selects Both.

15:14 reserved(0).

13:8 Event Select

Selects the event to be monitored.

00 0000b Monitoring Disabled.

00 0001b AGP Read Request Events.

00 0010b AGP Write Request Events.

00 0011b All AGP Request Events (does not include Flush or Fence requests).

00 0101b Singe Read that splits 4k page boundary.

00 0110b Single Write that splits line boundary.

01 0000b Flushes (events)

01 0001b Fences (events)

01 0010b RBF# active events.

01 0011b Events of write wait states inserted by AGP card

01 0100b Events of LPTT timeout with another request active.

01 0101b Events of MTT timeout with another request active.

01 0111b GART Aperture Misses

10 0000b AGP Clocks.

10 0100b Count AGP clocks that RBF# is stalled

10 0101b Count AGP clocks that low-priority read buffer is physically empty.

10 0110b Count AGP clocks that high-priority read buffer is physically empty.

10 0111b Count AGP clocks that both the low and high priority buffers are empty.

11 0000b Count AGP clocks that there are <=> ’n’ requests queued; using bits 31:24 and 19:18.

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Intel® 460GX Chipset Software Developer’s Manual