B1.121 Virtualization Processor ID Register
The VPIDR characteristics are:
Purpose
Holds the value of the Virtualization Processor ID. This is the value returned by Non-secure
EL1 reads of MIDR. See Figure B1-50 MIDR bit assignments on page B1-313.
Usage constraints
This register is accessible as follows:
EL0
(NS)
EL0
(S)
EL1
(NS)
EL1
(S)
EL2
EL3
(SCR.NS = 1)
EL3
(SCR.NS = 0)
- - - - RW RW -
Configurations
VPIDR is architecturally mapped to AArch64 register VPIDR_EL2. See B2.104 Virtualization
Processor ID Register, EL2 on page B2-555.
Attributes
VPIDR is a 32-bit register.
VPIDR resets to the value of MIDR.
31
0
VPIDR
Figure B1-69 VPIDR bit assignments
VPIDR, [31:0]
MIDR value returned by Non-secure PL1 reads of the MIDR. The MIDR description defines the
subdivision of this value. See Figure B1-50 MIDR bit assignments on page B1-313.
To access the VPIDR:
MRC p15,4,<Rt>,c0,c0,0 ; Read VPIDR into Rt
MCR p15,4,<Rt>,c0,c0,0 ; Write Rt to VPIDR
Register access is encoded as follows:
Table B1-100 VPIDR access encoding
coproc opc1 CRn CRm opc2
1111 100 0000 0000 000
B1 AArch32 system registers
B1.121 Virtualization Processor ID Register
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
B1-356
Non-Confidential
To Next Page
Loading...
Need help?
General
