450NX Datasheet, PDF (74/248 Pages) Intel Corporation – Intel 450NX PCIset

3. Register Descriptions
Bits Description
39:0 Count Value.
3.4.24 PME[1:0]: Performance Monitoring Event Selection
Address Offset: E8 - EBh
Default Value: 0000h each
Bits Description
Size:
16 bits each
Attribute: Read/Write
15
reserved (0)
14
Count Data Cycles
1: Count the data cycles associated with the selected transactions.
0: Count the selected event
13:10
Initiating Agent Selection.
This field qualifies the tracking of bus transactions by limiting event detection to those
transactions issued by specific agents.
0000
0001
0010
0011
0100
0101
0110
0111
Agent 0
Agent 1
Agent 2
Agent 3
Agent 4
Agent 5
reserved
reserved
1000
1001
1010
1011
1100
1101
1110
1111
reserved
reserved
reserved
reserved
reserved
south bridge
Intel^® 450NX PCIset agent (i.e., outbound)
Any agent
Note: This field is applicable only if the PCI bus is operated in internal arbiter mode.
If the bus is operated using an external arbiter, this field must be set to Any Agent to
trigger any events.
9:8 Transaction Destination Selection.
This field qualifies the tracking of bus transactions by limiting event detection to those
transactions directed to a specific resource.
00 Any
10 PCI Target
01 Main Memory 11 Third party
7:6 reserved
3-42
Intel® 450NX PCIset