The Processor ID (PRId) is a read-only, special-purpose register found in the MIPS32 and MIPS64 ISAs that can be queried to identify the MIPS CPU. The Processor ID should be unique for each instruction set or CPU control register change. The PRId is the 15th register in Coprocessor 0.
Register layout
The PRId is the 15th register in Coprocessor 0. It contains company options, company ID, CPU ID, and revision ID.
| 3124 |
2316 |
158 |
70
|
| Company Options |
Company ID |
CPU ID |
Revision
|
Company Options
The Company Options field is the most significant byte of the RPId register. The company options field depends on the manufacturer and the exact model being used. Consult your CPU manual for more information.
Company ID
The Company ID field is located at bits 16 through 23. Because the company ID is a relatively new addition, legacy processors have it defined as 0. The linux kernel defines the following values:[1]
| Company ID |
Company
|
| 0x000000 |
Legacy
|
| 0x010000 |
MIPS
|
| 0x020000 |
Broadcom
|
| 0x030000 |
Alchemy
|
| 0x040000 |
Sibyte
|
| 0x050000 |
Sandcraft
|
| 0x060000 |
NXP
|
| 0x070000 |
Toshiba
|
| 0x080000 |
LSI
|
| 0x0b0000 |
Lexra
|
| 0x0c0000 |
Netlogic
|
| 0x0d0000 |
Cavium
|
| 0xd00000 |
Ingenic
|
CPU ID
Legacy
| CPU ID |
CPU
|
| 0x0100 |
R2000
|
| 0x0100 |
AU1 Rev1
|
| 0x0200 |
AU2 Rev2
|
| 0x0200 |
R3000
|
| 0x0300 |
R6000
|
| 0x0400 |
R4000
|
| 0x0600 |
R6000A
|
| 0x0900 |
R10000
|
| 0x0b00 |
R4300
|
| 0x0c00 |
VR41XX
|
| 0x0e00 |
R12000
|
| 0x0f00 |
R14000
|
| 0x1000 |
R8000
|
| 0x1200 |
PR4450
|
| 0x2000 |
R4600
|
| 0x2100 |
R4700
|
| 0x2200 |
TX39
|
| 0x2200 |
R4640
|
| 0x2200 |
R4650
|
| 0x2300 |
R5000
|
| 0x2d00 |
TX49
|
| 0x2400 |
SONIC
|
| 0x2500 |
MAGIC
|
| 0x2700 |
RM7000
|
| 0x2800 |
NEVADA (RM5260?)
|
| 0x3400 |
RM9000
|
| 0x4200 |
LOONGSON1
|
| 0x5400 |
R5432
|
| 0x5500 |
R5500
|
| 0x6300 |
LOONGSON2
|
| 0xff00 |
Unknown
|
MIPS
| CPU ID |
CPU
|
| 0x8000 |
4KC
|
| 0x8100 |
5KC
|
| 0x8200 |
20KC
|
| 0x8400 |
4KEC
|
| 0x8600 |
4KSC
|
| 0x8800 |
25KF
|
| 0x8900 |
5KE
|
| 0x9000 |
4KECR2
|
| 0x9100 |
4KEMPR2
|
| 0x9200 |
4KSD
|
| 0x9300 |
24K
|
| 0x9500 |
34K
|
| 0x9600 |
24KE
|
| 0x9700 |
74K
|
| 0x9900 |
1004K
|
| 0x9a00 |
1074K
|
| 0x9c00 |
M14KC
|
| 0x9e00 |
M14KEC
|
Sibyte
| CPU ID |
CPU
|
| 0x0100 |
SB1
|
| 0x1100 |
SB1A
|
Sandcraft
| CPU ID |
CPU
|
| 0x0400 |
SR71000
|
Broadcom
| CPU ID |
CPU
|
| 0x4000 |
BMIPS32_REV4
|
| 0x8000 |
BMIPS32_REV8
|
| 0x9000 |
BMIPS3300
|
| 0x9100 |
BMIPS3300_ALT
|
| 0x0000 |
BMIPS3300_BUG
|
| 0xa000 |
BMIPS43XX
|
| 0x5a00 |
BMIPS5000
|
Cavium
| CPU ID |
CPU
|
| 0x0000 |
CAVIUM_CN38XX
|
| 0x0100 |
CAVIUM_CN31XX
|
| 0x0200 |
CAVIUM_CN30XX
|
| 0x0300 |
CAVIUM_CN58XX
|
| 0x0400 |
CAVIUM_CN56XX
|
| 0x0600 |
CAVIUM_CN50XX
|
| 0x0700 |
CAVIUM_CN52XX
|
| 0x9000 |
CAVIUM_CN63XX
|
| 0x9100 |
CAVIUM_CN68XX
|
| 0x9200 |
CAVIUM_CN66XX
|
| 0x9300 |
CAVIUM_CN61XX
|
| 0x9400 |
CAVIUM_CNF71XX
|
| 0x9500 |
CAVIUM_CN78XX
|
| 0x9600 |
CAVIUM_CN70XX
|
Ingenic
Netlogic
| CPU ID |
CPU
|
| 0x0000 |
NETLOGIC_XLR732
|
| 0x0200 |
NETLOGIC_XLR716
|
| 0x0900 |
NETLOGIC_XLR532
|
| 0x0600 |
NETLOGIC_XLR308
|
| 0x0800 |
NETLOGIC_XLR532C
|
| 0x0a00 |
NETLOGIC_XLR516C
|
| 0x0b00 |
NETLOGIC_XLR508C
|
| 0x0f00 |
NETLOGIC_XLR308C
|
| 0x8000 |
NETLOGIC_XLS608
|
| 0x8800 |
NETLOGIC_XLS408
|
| 0x8c00 |
NETLOGIC_XLS404
|
| 0x8e00 |
NETLOGIC_XLS208
|
| 0x8f00 |
NETLOGIC_XLS204
|
| 0xce00 |
NETLOGIC_XLS108
|
| 0xcf00 |
NETLOGIC_XLS104
|
| 0x4000 |
NETLOGIC_XLS616B
|
| 0x4a00 |
NETLOGIC_XLS608B
|
| 0x4400 |
NETLOGIC_XLS416B
|
| 0x4c00 |
NETLOGIC_XLS412B
|
| 0x4e00 |
NETLOGIC_XLS408B
|
| 0x4f00 |
NETLOGIC_XLS404B
|
| 0x8000 |
NETLOGIC_AU13XX
|
| 0x1000 |
NETLOGIC_XLP8XX
|
| 0x1100 |
NETLOGIC_XLP3XX
|
| 0x1200 |
NETLOGIC_XLP2XX
|
Revision
The revision is a manufacturer dependent value which can be used to track silicon revisions.
References
- ↑ GitHub linux/arch/mips/include/asm/cpu.h
