mhpmcounter3

Machine Hardware Performance Counter 3

Programmable hardware performance counter.

Attributes

Defining Extension

CSR Address

0xb03

Length

64-bit

Privilege Mode

Figure 1. mhpmcounter3 format

Name	Location	Type	Reset Value
mhpmcounter3.COUNT	63:0	[when,"HPM_COUNTER_EN[3]"] RW-H [when,"!(HPM_COUNTER_EN[3])"] RO	UNDEFINED_LEGAL

Name

Location

Type

Reset Value

63:0

[when,"HPM_COUNTER_EN[3]"] RW-H

[when,"!(HPM_COUNTER_EN[3])"] RO

UNDEFINED_LEGAL

Performance counter for event selected in mhpmevent3.EVENT.

Increments every time event occurs unless:

mcountinhibit.HPM3 <%- if ext?(:Smcdeleg) -%>or its alias scountinhibit.HPM3<%- end -%> is set <%- if ext?(:Sscofpmf) -%>
mhpmevent3.MINH is set and the current privilege level is M <%- if ext?(:S) -%>
mhpmevent3.SINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent3..SINH<%- end -%> is set and the current privilege level is (H)S <%- end -%> <%- if ext?(:U) -%>
mhpmevent3.UINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent3.SINH<%- end -%> is set and the current privilege level is U <%- end -%> <%- if ext?(:H) -%>
mhpmevent3.VSINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent3.SINH<%- end -%> is set and the current privilege level is VS
mhpmevent3.VUINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent3.SINH<%- end -%> is set and the current privilege level is VU <%- end -%> <%- end -%>

Unimplemented performance counter. Must be read-only 0 (access does not cause trap).

RW-H

This CSR may return a value that is different from what is stored in hardware.

if (HPM_COUNTER_EN[3]) {
  return read_hpm_counter(3);
} else {
  return 0;
}