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Register Descriptions
2-32 Intel® 460GX Chipset Software Developer’s Manual
23:15 UMASK Encodings
0 0000 0000 - Processor 0 - Monitor transactions originating from Processor 0
0 0000 0010 - Processor 1 - Monitor transactions originating from Processor 1
0 0000 0100 - Processor 2 - Monitor transactions originating from Processor 2
0 0000 0110 - Processor 3 - Monitor transactions originating from Processor 3
0 1000 0000 - All Processors - Monitor transactions originating from all Processors
0 0001 1010 - Configuration Space - Monitor transactions originating from Config Block
1 0000 0000 - All Initiators - Monitor all transactions
14:8 Event Select
Note: In the fields below bit 13 sometimes has an ’R’. This stands for retry. If ’R’ is set to a 1 then the
count is the number of occurrences of the event that were retried. If ’R’ is set to a 0, then the count
is for non-retried occurrences of the event. For example 110_0000b would be retried Interrupt Acks
and 100_0000b is for non-retried Interrupt Acks.
Selects the event to be monitored.
000 0000b Monitoring Disabled.
011 1111b All Clocks.
1R0 0000b Interrupt Ack
1R1 0001b Special Transaction and Defer Reply to Write.
1R0 0010b I/O Read
1R0 0011b I/O Write - Deferred Reply
1R1 0011b I/O Write - Posted.
1R0 0101b Purge TC and reserved and Branch Trace Messages
1R1 0101b Outbound Interrupt or Hard Fail Write Completion
1R0 0110b Mem Read
1R1 0111b Memory Write
110 1000b Check Connection
1R0 1010b Cfg Read
1R0 1011b Cfg Write - Deferred Reply
1R1 1011b Cfg Write - Posted
000 1100b Inbound Interrupt
1R0 1110b Locked Read - In Order
1R1 1110b Locked Read - Delayed
1R1 1111b Mem Write-Line
1R1 0000b Normal Read Completion
1R1 0100b Memory Scrub
1R0 1100b SSBR
1R1 1101b RSBR
000 0001b Snoop events
000 0010b Snoop Stall events caused by 460GX chipset
000 0011b Snoop Stall events caused by processors
000 0100b Snoop Stall events by either CPU’s or GX
000 0101b Hit events from CPU
000 0110b BNR events from GX
000 0111b BNR events from CPU
000 1000b BNR events from GX or CPU
000 1001b BPRI Clocks from GX
000 1010b BPRI Events from GX
000 1011b BPRI ADS’s from GX
001 0001b Speculative reads that are not used because of HITW
001 0010b Speculative reads that are not used because of HITM
001 0011b Speculative reads that are not used because of retry
001 0100b Speculative reads that are not used because read was restarted
001 0101b Speculative reads that were successful
001 0110b Speculative reads that were not done speculatively