mhpmcounter4h

Machine Hardware Performance Counter 4, Upper half

Upper half of mhpmcounter4.

Attributes

Defining Extension

  • Smhpm, version >= 0

CSR Address

0xb84

Length

32-bit

Privilege Mode

M

Format

mhpmcounter4h format
Figure 1. mhpmcounter4h format

Field Summary

Name Location Type Reset Value

mhpmcounter4h.COUNT

32:0

[when,"HPM_COUNTER_EN[4]"] RW-H

[when,"!(HPM_COUNTER_EN[4])"] RO

[when,"HPM_COUNTER_EN[4]"] UNDEFINED_LEGAL

[when,"!(HPM_COUNTER_EN[4])"] 0

Fields

COUNT

Location

32:0

Description

Upper bits of counter.

Type
RW-H
RO
Reset value
UNDEFINED_LEGAL
0

Software read

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

if (HPM_COUNTER_EN[4]) {
  return read_hpm_counter(4)[63:32];
} else {
  return 0;
}