The OSLAR_EL1 characteristics are:
Used to lock or unlock the OS lock.
This register is part of the Debug registers functional group.
This register is accessible as follows:
Off | DLK | EDAD | SLK | Default |
---|---|---|---|---|
Error | Error | IMP DEF | WI | WO |
External register OSLAR_EL1 is architecturally mapped to AArch64 System register OSLAR_EL1.
External register OSLAR_EL1 is architecturally mapped to AArch32 System register DBGOSLAR.
OSLAR_EL1 is in the Core power domain.
From ARMv8.2, external debug accesses to OSLAR_EL1 are ignored and return an error when any of:
OSLAR_EL1 is a 32-bit register.
The OSLAR_EL1 bit assignments are:
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | OSLK |
Reserved, RES0.
On writes to OSLAR_EL1, bit[0] is copied to the OS lock.
Use EDPRSR.OSLK to check the current status of the lock.
OSLAR_EL1 can be accessed through the external debug interface:
Component | Offset |
---|---|
Debug | 0x300 |
28/09/2017 08:24
Copyright © 2010-2017 ARM Limited or its affiliates. All rights reserved. This document is Non-Confidential.