ii Copyright © 1996-1998, 2000, 2004-2012, 2014, 2018 ARM Limited. All rights reserved. ARM DDI 0406C.d
Non-Confidential ID040418
ARM Architecture Reference Manual
ARMv7-A and ARMv7-R edition
Copyright © 1996-1998, 2000, 2004-2012, 2014, 2018 ARM Limited. All rights reserved.
Release Information
The following changes have been made to this document.
Note that issue C.a, the first publication of issue C of this manual, was originally identified as issue C.
From ARMv7, the ARM
®
architecture defines different architectural profiles and this edition of this manual describes only the A
and R profiles. For details of the documentation of the ARMv7-M profile see Additional reading on page xxiii. Before ARMv7
there was only a single ARM Architecture Reference Manual, with document number DDI 0100. The first issue of this was in
February 1996, and the final issue, issue I, was in July 2005. For more information see Additional reading on page xxiii.
Proprietary Notice
This document is protected by copyright and other related rights and the practice or implementation of the information contained
in this document may be protected by one or more patents or pending patent applications. No part of this document may be
reproduced in any form by any means without the express prior written permission of Arm. No license, express or implied, by
estoppel or otherwise to any intellectual property rights is granted by this document unless specifically stated.
Your access to the information in this document is conditional upon your acceptance that you will not use or permit others to use
the information for the purposes of determining whether implementations infringe any third party patents.
THIS DOCUMENT IS PROVIDED “AS IS”. ARM PROVIDES NO REPRESENTATIONS AND NO WARRANTIES,
EXPRESS, IMPLIED OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, SATISFACTORY QUALITY, NON-INFRINGEMENT OR FITNESS FOR A PARTICULAR
PURPOSE WITH RESPECT TO THE DOCUMENT. For the avoidance of doubt, Arm makes no representation with respect to,
and has undertaken no analysis to identify or understand the scope and content of, patents, copyrights, trade secrets, or other rights.
This document may include technical inaccuracies or typographical errors.
TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT WILL ARM BE LIABLE FOR ANY DAMAGES,
INCLUDING WITHOUT LIMITATION ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, OR
CONSEQUENTIAL DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING
OUT OF ANY USE OF THIS DOCUMENT, EVEN IF ARM HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
This document consists solely of commercial items. You shall be responsible for ensuring that any use, duplication or disclosure
of this document complies fully with any relevant export laws and regulations to assure that this document or any portion thereof
is not exported, directly or indirectly, in violation of such export laws. Use of the word “partner” in reference to Arm’s customers
is not intended to create or refer to any partnership relationship with any other company. Arm may make changes to this document
at any time and without notice.
If any of the provisions contained in these terms conflict with any of the provisions of any click through or signed written
agreement covering this document with Arm, then the click through or signed written agreement prevails over and supersedes the
conflicting provisions of these terms. This document may be translated into other languages for convenience, and you agree that
if there is any conflict between the English version of this document and any translation, the terms of the English version of the
Agreement shall prevail.
Change History
Date Issue Confidentiality Change
05 April 2007 A Non-Confidential New edition for ARMv7-A and ARMv7-R architecture profiles.
Document number changed from ARM DDI 0100 to ARM DDI 0406 and contents restructured.
29 April 2008 B Non-Confidential Addition of the VFP Half-precision and Multiprocessing Extensions, and many clarifications and enhancements.
23 November 2011 C (C.a) Non-Confidential Addition of the Virtualization Extensions, Large Physical Address Extension, Generic Timer Extension, and other
additions. Many other clarifications and enhancements.
24 July 2012 C.b Non-Confidential Errata release for issue C.a.
20 May 2014 C.c Non-Confidential Second errata release for issue C.a.
29 March 2018 C.d Non-Confidential Addition of CSDB instruction and some defect fixes.
