12.5.1. Processor ID Registers

The Processor ID Registers are read-only registers that return the same values as the corresponding CP15 registers.

Table 12.33 shows the offset value, register number, mnemonic, and description that are associated with each Process ID Register.

Table 12.33. Processor Identifier Registers

OffsetRegister numberMnemonicFunction
0xD00832CPUIDMain ID Register, see c0, Main ID Register
0xD04833CTYPRCache Type Register, see c0, Cache Type Register
0xD08834-Reserved, RAZ
0xD0C835TTYPRTLB Type Register, see c0, TLB Type Register
0xD10836-Main ID Register, see c0, Main ID Register
0xD14837-Reserved, RAZ
0xD18838-Main ID Register, see c0, Main ID Register
0xD1C839-Main ID Register, see c0, Main ID Register
0xD20840ID_PFR0Processor Feature Register 0, see c0, Processor Feature Register 0
0xD24841ID_PFR1Processor Feature Register 1, see c0, Processor Feature Register 1
0xD28842ID_DFR0Debug Feature Register 0, see c0, Debug Feature Register 0
0xD2C843ID_AFR0Auxiliary Feature Register 0, see c0, Auxiliary Feature Register 0
0xD30844ID_MMFR0Memory Model Feature Register 0, see c0, Memory Model Feature Register 0
0xD34845ID_MMFR1Memory Model Feature Register 1, see c0, Memory Model Feature Register 1
0xD38846ID_MMFR2Memory Model Feature Register 2, see c0, Memory Model Feature Register 2
0xD3C847ID_MMFR3Memory Model Feature Register 3, see c0, Memory Model Feature Register 3
0xD40848ID_ISAR0Instruction Set Attributes Register 0, see c0, Instruction Set Attributes Register 0
0xD44849ID_ISAR1Instruction Set Attributes Register 1, see c0, Instruction Set Attributes Register 1
0xD48850ID_ISAR2Instruction Set Attributes Register 2, see c0, Instruction Set Attributes Register 2
0xD4C851ID_ISAR3Instruction Set Attributes Register 3, see c0, Instruction Set Attributes Register 3
0xD50852ID_ISAR4Instruction Set Attributes Register 4, see c0, Instruction Set Attributes Register 4
0xD54853ID_ISAR5Instruction Set Attributes Register 5, see c0, Instruction Set Attributes Registers 5-7

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