mhpmcounter31h

Machine Hardware Performance Counter 31, Upper half

Upper half of mhpmcounter31.

Attributes

CSR Address

0xb9f

Defining extension

  • Smhpm, version >= 0

Length

32-bit

Privilege Mode

M

Format

mhpmcounter31h format
Figure 1. mhpmcounter31h 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[31]) {
  return read_hpm_counter(31)[63:32];
} else {
  return 0;
}