3.3.17. Event Select Register

The Event Select Register (ESR) characteristics are:

Purpose

Determines the event that a particular counter counts. One register exists per counter. This register is not present for the cycle counter.

Usage constraints

There are no usage constraints.

Configurations

Available in all CCI-400 configurations.

Attributes

Figure 3.16 shows the bit assignments.

Figure 3.16. Event Select Register bit assignments

To view this graphic, your browser must support the SVG format. Either install a browser with native support, or install an appropriate plugin such as Adobe SVG Viewer.


Table 3.20 shows the bit assignments.

Table 3.20. Event Select Register bit assignments

Bits

Reset

Access

Function

[31:8]

-

RAZ/WI

Reserved.

[7:5]

0x0

RW

Event code to define which interface to monitor. See PMU event list.

[4:0]

0x0

RW

Event code to define which event to monitor. See PMU event list.


Note

You can use event counters in different ways, for example:

  • To measure traffic across all interfaces by using a counter for each interface.

  • To analyze a particular interface by using all the counters to measure a different aspect of the interface.

Copyright © 2011-2014 ARM. All rights reserved.ARM DDI 0470J
Non-ConfidentialID031714