ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition

Debug Registers Reference
C10.8.3 Claim Tag Set Register (DBGCLAIMSET)
The Claim Tag Set Register, DBGCLAIMSET, enables the CLAIM bits, bits [7:0] of the register, to be set
to 1. CLAIM bits do not have any specific functionality. ARM expects the usage model to be that an external
debugger and a debug monitor can set specific bits to 1 to claim the corresponding debug resources.
The CLAIM bits are always RAO in the DBGCLAIMSET Register. This enables a debugger to identify the
number of CLAIM bits that are implemented. See Claim Tag Clear Register (DBGCLAIMCLR) on
page C10-93 for details of how to:
clear CLAIM bits to 0
read the current values of the CLAIM bits.
The DBGCLAIMSET Register is:
debug register 1000, at offset 0xFA0
a read/write register, in which:
— the CLAIM bits are always RAO
— writing 0 to a CLAIM bit has no effect
when the Security Extensions are implemented, a Common register.
The format of the DBGCLAIMSET Register is:
31 8 7 0
Reserved, RAZ/SBZP CLAIM
Bits [31:8] Reserved, RAZ/SBZP.
CLAIM bits, bits [7:0]
Writing a 1 to one of these bits sets the corresponding CLAIM bit to 1. Multiple bits can be
set to 1 in a single write operation.
Writing 0 to one of these bits has no effect.
You must use the DBGCLAIMCLR Register to:
read the values of the CLAIM bits
clear a CLAIM bit to 0.
These bits are always RAO.
If a debugger reads this register, the bits that are set to 1 correspond to the implemented CLAIM bits.
C10-92 Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. ARM DDI 0406B