mhartid

Machine Hart ID

Reports the unique hart-specific ID in the system.

Attributes

Defining Extension	Sm, version >= 0
CSR Address	0xf14
Length	32 when CSR[misa].MXL == 0 64 when CSR[misa].MXL == 1
Privilege Mode	M

Defining Extension

CSR Address

0xf14

Length

32 when CSR[misa].MXL == 0 64 when CSR[misa].MXL == 1

Privilege Mode

This CSR format changes dynamically.

Figure 1. mhartid Format when CSR[misa].MXL == 0

Figure 2. mhartid Format when CSR[misa].MXL == 1

Name	Location	Type	Reset Value
mhartid.ID	* 31:0 when CSR[misa].MXL == 0 * 63:0 when CSR[misa].MXL == 1	RO	UNDEFINED_LEGAL

Name

Location

Type

Reset Value

* 31:0 when CSR[misa].MXL == 0 * 63:0 when CSR[misa].MXL == 1

UNDEFINED_LEGAL

Location

Description

hart-specific ID.

Type

Reset value

UNDEFINED_LEGAL

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

return hartid();