hpmcounter29

Unprivileged Hardware Performance Counter 29

Alias for M-mode CSR mhpmcounter29.

See mhpmcounter29 for information on privilege mode access control.

Attributes

CSR Address	0xc1d
Defining extension	Zihpm
Length	64-bit
Privilege Mode	U

CSR Address

0xc1d

Defining extension

Zihpm

Length

64-bit

Privilege Mode

Format

Figure 1. hpmcounter29 format

Field Summary

Name Location Type Reset Value

Name	Location	Type	Reset Value
`COUNT`	63:0	RO-H	UNDEFINED_LEGAL

COUNT

63:0

RO-H

UNDEFINED_LEGAL

Fields

`COUNT`

Location: hpmcounter29[63:0]
Description: Alias of mhpmcounter29.COUNT.
Type

RO-H	Read-Only with Hardware update Writes are ignored. Reads reflect a value dynamically generated by hardware.

Reset value: UNDEFINED_LEGAL

Software read

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

Pruned
Original

if (mode() == PrivilegeMode::S) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
} else if (mode() == PrivilegeMode::U) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
} else if (mode() == PrivilegeMode::VS) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
} else if (mode() == PrivilegeMode::VU) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
return read_hpm_counter(29);

if (mode() == PrivilegeMode::S) {
  if (CSR[mcounteren].HPM29 == 1'b0) {
    raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
  }
} else if (mode() == PrivilegeMode::U) {
  if (CSR[misa].S == 1'b1) {
    if ((CSR[mcounteren].HPM29 & CSR[scounteren].HPM29) == 1'b0) {
      raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
    }
  } else if (CSR[mcounteren].HPM29 == 1'b0) {
    raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
  }
} else if (mode() == PrivilegeMode::VS) {
  if (CSR[hcounteren].HPM29 == 1'b0 && CSR[mcounteren].HPM29 == 1'b1) {
    raise(ExceptionCode::VirtualInstruction, mode(), $encoding);
  } else if (CSR[mcounteren].HPM29 == 1'b0) {
    raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
  }
} else if (mode() == PrivilegeMode::VU) {
  if (CSR[hcounteren].HPM29 & CSR[scounteren].HPM29) == 1'b0) && (CSR[mcounteren].HPM29 == 1'b1 {
    raise(ExceptionCode::VirtualInstruction, mode(), $encoding);
  } else if (CSR[mcounteren].HPM29 == 1'b0) {
    raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
  }
}
return read_hpm_counter(29);