450NX Datasheet, PDF (54/248 Pages) Intel Corporation – Intel 450NX PCIset

3. Register Descriptions
Bits Description
39:0 Count Value.
3.3.32 PME[1:0]: Performance Monitoring Event Selection
Address Offset: E8-E9h, EA-EBh
Default Value: 0000h each
Size:
16 bits each
Attribute: Read/Write
Bits Description
15
reserved (0)
14
Count Data Cycles
1: Count the request length of the selected transaction.
0: Count the selected event
13
reserved (0)
12:10
Initiating Agent Selection.
This field qualifies the tracking of bus transactions by limiting event detection to those
transactions issued by specific agents.
000 Symmetric Agent 0 (DID=0/000) 100 Any symmetric agent (DID=0/xxx)
001 Symmetric Agent 1 (DID=0/001) 101 Third party agent (DID=1/other)
010 Symmetric Agent 2 (DID=0/010) 110 Intel^® 450NX PCIset agent (DID=1/001)
011 Symmetric Agent 3 (DID=0/011) 111 Any agent
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 Not Third Party or Memory¹
01 Main Memory
11 Third party
1. The usual destination in this category is a PCI Target. Also included are Internal CFC/CF8
accesses, Branch trace messages, Interrupt acknowledge, and some special transactions.
7:6 Data Length Selection.
This field qualifies the tracking of bus transactions by limiting event detection to those
transactions of a specific length.
00 Any
01 Lines
10 Part-lines or partials
11 reserved
5:0 Event Selection.
This field specifies the basic system bus transaction, system bus signal assertion, or
memory event to be monitored.
Individual Bus Transactions
00 0000 Deferred Reply
00 0001 reserved
00 0010 reserved
00 0011 reserved
00 0100 I/O Read
00 0101 I/O Write
00 1000
00 1001
00 1010
00 1011
00 1100
00 1101
reserved
reserved
Memory Read Invalidate
reserved
Memory Read Code
Memory Writeback
3-22
Intel® 450NX PCIset