mhpmcounter5

Machine Hardware Performance Counter 5

Programmable hardware performance counter.

The hpmcounter5 CSR is a read-only shadow of this CSR. Access to hpmcounter5 is controlled with mcounteren.HPM5 <%- if ext?(:S) -%> , scounteren.HPM5 <%- if ext?(:H) -%> , and hcounteren.HPM5 <%- end -%> <%- end -%> as follows:

<%- if ext?(:H) -%>

mcounteren.HPM5

scounteren.HPM5

hcounteren.HPM5

hpmcounter5 behavior

S-mode

U-mode

VS-mode

VU-mode

0

-

-

IllegalInstruction

IllegalInstruction

IllegalInstruction

IllegalInstruction

1

0

0

read-only

IllegalInstruction

VirtualInstruction

VirtualInstruction

1

1

0

read-only

read-only

VirtualInstruction

VirtualInstruction

1

0

1

read-only

IllegalInstruction

read-only

VirtualInstruction

1

1

1

read-only

read-only

read-only

read-only

<%- elsif ext?(:S) -%>

mcounteren.HPM5

scounteren.HPM5

hpmcounter5 behavior

S-mode

U-mode

0

-

IllegalInstruction

IllegalInstruction

1

0

read-only

IllegalInstruction

1

1

read-only

read-only

<%- else -%>

mcounteren.HPM5

hpmcounter5 behavior

U-mode

0

IllegalInstruction

1

read-only

<%- end -%>

Attributes

Requirement

Sm

Defining extensions

Sm

Machine mode

CSR Address

0xb05

Length

64-bit

Privilege Mode

M

Format

mhpmcounter5 format
Figure 1. mhpmcounter5 format

Field Summary

Name Location Type Reset Value

mhpmcounter5.COUNT

63:0

[when,"HPM_COUNTER_EN[5]"] RW-H

[when,"!(HPM_COUNTER_EN[5])"] RO

UNDEFINED_LEGAL

Fields

COUNT

Location

63:0

Description

Performance counter for event selected in mhpmevent5.EVENT.

Increments every time event occurs unless:

  • mcountinhibit.HPM5 <%- if ext?(:Smcdeleg) -%>or its alias scountinhibit.HPM5<%- end -%> is set <%- if ext?(:Sscofpmf) -%>

  • mhpmevent5.MINH is set and the current privilege level is M <%- if ext?(:S) -%>

  • mhpmevent5.SINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent5.SINH<%- end -%> is set and the current privilege level is (H)S <%- end -%> <%- if ext?(:U) -%>

  • mhpmevent5.UINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent5.UINH<%- end -%> is set and the current privilege level is U <%- end -%> <%- if ext?(:H) -%>

  • mhpmevent5.VSINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent5.VSINH<%- end -%> is set and the current privilege level is VS

  • mhpmevent5.VUINH <%- if ext?(:Ssccfg) -%>or its alias hpmevent5.VUINH<%- 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).

Type

RW-H

RO

Reset value

UNDEFINED_LEGAL

Software read

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

if (HPM_COUNTER_EN[5]) {
  return read_hpm_counter(5);
} else {
  return 0;
}