[linux-2.6-block.git] / Documentation / devicetree / bindings / arc / pmu.txt

* ARC Performance Monitor Unit

The ARC 700 can be configured with a pipeline performance monitor for counting
CPU and cache events like cache misses and hits.

Note that:
 * ARC 700 refers to a family of ARC processor cores;
   - There is only one type of PMU available for the whole family;
   - The PMU may support different sets of events; supported events are probed
     at boot time, as required by the reference manual.

 * The ARC 700 PMU does not support interrupts; although HW events may be
   counted, the HW events themselves cannot serve as a trigger for a sample.

Required properties:

- compatible : should contain
	"snps,arc700-pmu"

Example:

pmu {
        compatible = "snps,arc700-pmu";
};
Commit	Line	Data
d6a7f73d MJ	1	* ARC Performance Monitor Unit
	2
	3	The ARC 700 can be configured with a pipeline performance monitor for counting
	4	CPU and cache events like cache misses and hits.
	5
	6	Note that:
	7	* ARC 700 refers to a family of ARC processor cores;
	8	- There is only one type of PMU available for the whole family;
	9	- The PMU may support different sets of events; supported events are probed
	10	at boot time, as required by the reference manual.
	11
	12	* The ARC 700 PMU does not support interrupts; although HW events may be
	13	counted, the HW events themselves cannot serve as a trigger for a sample.
	14
	15	Required properties:
	16
	17	- compatible : should contain
	18	"snps,arc700-pmu"
	19
	20	Example:
	21
	22	pmu {
	23	compatible = "snps,arc700-pmu";
	24	};