mhpmcounter21h

Machine Hardware Performance Counter 21, Upper half

Upper half of mhpmcounter21.

Attributes

CSR Address

0xb95

Defining extension

  • Smhpm, version >= 0

Length

32-bit

Privilege Mode

M

Format

mhpmcounter21h format
Figure 1. mhpmcounter21h format

Field Summary

Name Location Type Reset Value

Fields

This CSR has no fields. However, it must still exist (not cause an Illegal Instruction trap) and always return zero on a read.

Software read

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

  • Pruned

  • Original

return 0;
if (HPM_COUNTER_EN[21]) {
  return read_hpm_counter(21)[63:32];
} else {
  return 0;
}