Datasheet
Configuration Registers
3-60 Intel
®
E8870 Scalable Node Controller (SNC) Datasheet
3.10.15 SPPME[1:0]: SP Performance Monitor Events
The SP performance counter logic provides the ability to monitor those packets that are received by
the SP interface of the SNC. Events related to inbound requests packets such as processor bus
snoop and/or memory requests generated by the SPS or SIOH can be monitored. Responses to
earlier SNC SP requests can also be monitored (i.e. outbound read completions).
The PME register is divided into major sub-groups. For some sub-groups, the events within a
group are OR’d together. Each major group is AND’ed together to select the event.
4:2 RW 000
CE_Src: Counter Enable Source
These bits identify which input enables the counter. Default value disables
counting.
000 Disabled
001 PERFCON local_count_enable field
010 Partner event status (max compare, overflow, cascade)
011 Reserved
100 EV0 pin
101 EV1 pin
110 EV2 pin
111 EV3 pin
1RW0
Clear Overflow
This bit clears overflow bit in associated PMD counter. The counters
continues counting. This bit is cleared by hardware when the operation is
complete.
0RW0
Reset
Setting this bit resets all registers associated with this counter to the default
state. It does not change this PMR register since any desired value can be
loaded while setting the Reset bit. This Reset bit will by cleared after the reset
is completed.For diagnostic purposes, the contents of the other registers can
be read to verify operation of this bit. There is also a reset bit in the
PERFCON register that clears all counter registers including the PMR.
Device: NodeID
Function: 2
Offset: E0h (SPPMR0), F0h(SPPPMR1) (Continued)
Bit Attr Default Description
Device: NodeID
Function: 2
Offset: ECh (SPPMD0), FCh(SPPMD1)
Bit Attr Default Description
31:28 RV 0 Reserved
27:25 RW 0h
DLEN Field
Selects the data length of the transaction.
111 Any length
000 0-8 bytes
001 16 bytes
010 32 bytes
011 64 bytes
100 128 bytes
101 - 110 Reserved
24:21 RW 0
Attribute
1111 All attributes selected
xxxx Matches the attribute field of the packet (except 1111)