1、IEEE Std 1394.1-20041394.1TMIEEE Standard forHigh Performance Serial Bus Bridges3 Park Avenue, New York, NY 10016-5997, USAIEEE Computer SocietySponsored by theMicroprocessor and Microcomputer Standards Committee1 July 2005Print: SH95311PDF: SS95311Authorized licensed use limited to: IHS Stephanie D
2、ejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. Recognized as anAmerican National Standard (ANSI)The Institute of Electrical
3、and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2005 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 1 July 2005. Printed in the United States of America.IEEE is a registered trademark in the U.S. Patent +1 978 750 8400
4、. Permission to photocopy portions of any individual standard for educationalclassroom use can also be obtained through the Copyright Clearance Center.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. Copyright 20
5、05 IEEE. All rights reserved.iiiIntroductionJanuary 15 through 16, 1996, in Dallas, Texas, Gerald Marazas convened a study group authorized by the IEEEMicroprocessor Standards Committee (MSC). The study group was chartered to investigate the industry desire forand the feasibility of enhancements to
6、recently approved IEEE Std 1394-1995; enhancements that would enablethe geographic scope of a single Serial Bus to be extended to an interconnected net of multiple buses. Althoughthe informative overview in IEEE Std 1394-1995 describes the use of bus bridges to connect up to 1023 SerialBuses into a
7、single net, the standard is scant on normative details as to how bus bridges might operate.The study group continued meeting through May 1996, during which time it considered presentations on possibledesigns for Serial Bus bridges and discussed the Scope and Purpose of a Project Authorization Reques
8、t (PAR) tobe submitted to the IEEE Standards Association. The basic objectives were agreed at the second study groupmeeting; drafting the PAR was delegated to a small group that completed its work and obtained study groupratification of the PAR in time to submit it to the IEEE-SA for consideration a
9、t its June meeting. The IEEE-SAauthorized the project, IEEE P1394.1, High Performance Serial Bus Bridges, on June 20, 1996.The IEEE P1394.1 working group held its first official meeting in July 1996, in San Jose, CA. At this meeting,Richard Scheel was elected Chair of the working group. Scheel sheph
10、erded the working groups deliberationsuntil July 2000, when the focus of his work activity at Sony shifted away from IEEE 1394. During Scheelstenure as Chair, the working group engaged in vigorous debate on topics central to Serial Bus bridges: Self-organizing behavior of bridge portals when net top
11、ology changes, which necessitates updates to eachportals routing information.Distribution and synchronization of CYCLE_TIME.cycle_offsetfrom a single cycle master (dubbed thenet cycle master) to all buses within the net. Knowledge of application-dependent isochronous data formats, such as those spec
12、ified by the IEC 61883family of standards, so that bridge portals can modify timestamps embedded in the data. Relatively stable 16-bit node IDs (dubbed global node IDs) used to reference remote nodes. Detection and elimination of routing loops introduced into the net topology by user actions. Connec
13、tion management for isochronous streams.Minimum capabilities for “bridge-aware” devices that communicate with other, remote devices.Limited support for legacy devices that are not “bridge-aware.” Congestion management strategies, i.e., the persistence of bridge portals in attempts to forward request
14、and response subactions to the next bridge portal.Assignment of unique bus IDs to distinct Serial Buses within the net. Device discovery protocols, both for local devices on the same bus and for remote devices connected toother parts of the net. Net management messages for inter-portal communication
15、 and, in some cases, communication between“bridge-aware” devices and bridge portals.In April 2000, at the 1394 Trade Association meeting in Brussels, Dr. Judi Romijn of the Technische UniversiteitEindhoven in the Netherlands made a presentation on the use of formal methods in the discovery of a flaw
16、 in theIEEE 1394 PHY state machines that govern bus configuration. This was a fortuitous circumstance, since keymembers of the IEEE P1394.1 working group were present and engaged her in conversation about the possibleapplication of formal methods to IEEE P1394.1. There was mutual interest, and since
17、 then Judi Romijn has beenan active and invaluable contributorparticularly with respect to formal proof that the self-organizing behaviorof bridge portals (net update) terminates in a consistent state.This introduction is not a part of IEEE Std 1394.1-2004, IEEE Standard for High Performance Serial
18、Bus Bridges.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. ivCopyright 2005 IEEE. All rights reserved.Later that summer, at the July 2000 meeting, the working group elected Peter Johansson as Chair. One of the
19、firstorders of business was to take stock of the draft standard and determine what, if any, incomplete areas existed thatrequired substantial “invention” before the draft could proceed to Sponsor Ballot. Consensus resulted that althoughsignificant effort remained to document the working groups agree
20、ments, none of the unresolved issues were major.The working group anticipated a schedule that would yield a functionally complete and reviewed draft standard bythe end of 2000, with Sponsor Ballot to follow in the first quarter of 2001. Work proceeded apace on the draft andby the end of March 2001,
21、the penultimate draft before Sponsor Ballot was published for final review by theworking group. A modest number of changes were made in the final draft, published in June, and Sponsor Ballotcommenced the same month.After collation of more than 500 ballot comments (the substance and volume of which r
22、evealed as overlyoptimistic the earlier working group consensus with respect to “no major issues”) and formation of the BallotResponse Committee (BRC), the Editor spent several months resolving the less controversial editorial andtechnical comments before publishing an interim draft in December 2001
23、. The BRC held its first meeting in SanJose at the beginning of December 2001, and continued to meet the subsequent year until agreement in principle onthe resolution of all comments was achieved in October 2002.Because of a change in management support, as well as commitment to other projects, the
24、Editor was unable topublish a candidate draft for Recirculation Ballot until November 2003. The BRC met in early December for finalreview and corrections to the draft before a Recirculation Ballot was initiated in March 2004.Notice to usersErrataErrata, if any, for this and all other standards can b
25、e accessed at the following URL:http:/standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL for errataperiodically.InterpretationsCurrent interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/index.html.Patent n
26、oticeAttention is called to the possibility that implementation of this standard may require use of subject matter coveredby patent rights. By publication of this standard, no position is taken with respect to the existence or validity of anypatent rights in connection therewith. The IEEE shall not
27、be responsible for identifying all patents for which alicense may be required by an IEEE standard or for conducting inquiries into the legal validity or scope of thosepatents that are brought to its attention. A patent holder has filed a statement of assurance that it will grant a licenseunder these
28、 rights without compensation or under reasonable rates and nondiscriminatory, reasonable terms andconditions to all applicants desiring to obtain such licenses. The IEEE makes no representation as to thereasonableness of rates and/or terms and conditions of the license agreements offered by patent h
29、olders. Furtherinformation may be obtained from the IEEE Standards Department.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. Copyright 2005 IEEE. All rights reserved.vParticipantsThe following is a list of acti
30、ve participants in the IEEE P1394.1 working group (those who attended three ormore meetings from inception to the time of publication):Peter Johansson,Chair and EditorDavid Hunter,SecretaryThe following members of the individual balloting committee voted on this standard. Balloters may have voted fo
31、rapproval, disapproval, or abstention.The following people served on the ballot response committee:Peter Johansson,ChairJean-Paul AccarieMasa AkahaneSubrata BannerjeeSteven BardPhilippe BoucachardMohamed BraneciRichard ChurchillBeth CooperChris DorseyFirooz FarhoomandSteve FinchLaurent FrouinJohn Fu
32、llerEric HannahJerry HauckDieter HauptHisaki HiraiwaDaisuke HiraokaDu Hung HouDavid JamesMark KnechtDavid LaFolletteYvon LegallaisJun-ichi MatsudaDaniel MeirsmanNeil MorrowAtsushi NakamuraYoshikatsu NiwaFritz NordbyTakayuki NyuOzay OktayTomoki SaitoTakashi SatoTetsuya SatoBradley SaundersYoshi Sawad
33、aRichard ScheelHisato ShimaMichael SmithDavid SmithCarlton SparrellGilles StraubThomas ThalerKazonobu ToguchiSatoru ToguchiMasatoshi UenoColin Whitby-StrevensCalto WongDavid WootenPatrick YuDave ZalatimoFrank ZhaoJean-Paul AccarieStelios AkalestosEric AndersonLarry ArnettTerry ArnoldMohamed BraneciK
34、eith ChowElizabeth CooperGuru Dutt DhingraGeorg DickmannSourav DuttaRoger D. EdwardsFirooz FarhoomandMichael FischerGordon Force SrLaurent FrouinJohn FullerStraub GillesDieter HauptNeil HormanDavid HunterDavid JamesPeter JohanssonMark KnechtRobert MortonsonChuck RiceGary RobinsonBivabasu SarkarTakas
35、hi SatoBradley SaundersThomas SchaalRichard ScheelAkihiro ShimuraMichael TeenerThomas ThalerDavid ThompsonKazunobu ToguchiRobert TripiColin Whitby-StrevensDavid WootenPaul WorkDon WrightPatrick YuOren YuenJanusz ZalewskiMohamed BraneciGeorg DickmannJohn FullerDavid HunterJudi RomijnTakashi SatoGille
36、s StraubEldad TeeniThomas ThalerKazunobu ToguchiColin Whitby-StrevensDavid WootenAuthorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. viCopyright 2005 IEEE. All rights reserved.This standard was approved by the IEEE-
37、SA Standards Board on 8 December 2004 with the following membership:Don Wright,ChairSteve M. Mills, Vice ChairJudith Gorman,Secretary*Member EmeritusAlso included are the following nonvoting IEEE-SA Standards Board liaisons:Satish K. Aggarwal, NRC RepresentativeRichard DeBlasio, DOE RepresentativeAl
38、an Cookson, NIST RepresentativeMichelle TurnerIEEE Standards Project EditorChuck AdamsStephen BergerMark D. BowmanJoseph A. BruderBob DavisRoberto de Marca BoissonJulian Forster*Arnold M. GreenspanMark S. HalpinRaymond HapemanRichard J. HollemanRichard H. HulettLowell G. JohnsonJoseph L. Koepfinger*
39、Hermann KochThomas J. McGeanDaleep C. MohlaPaul NikolichT. W. OlsenRonald C. PetersenGary S. RobinsonFrank StoneMalcolm V. ThadenDoug ToppingJoe D. WatsonAuthorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. Copyright
40、 2005 IEEE. All rights reserved.viiContents1. Overview11.1 Scope 11.2 Purpose .12. Normative references .33. Definitions and notation .53.1 Conformance 53.2 Technical.53.3 Document notation94. Bridge model (informative)154.1 Global node IDs164.2 Remote time-out .174.3 Clan affinity and net update184
41、.4 Cycle time distribution and synchronization.204.5 Universal time.224.6 Stream connection management .245. Bridge portal and bridge-aware node facilities.315.1 Configuration ROM315.2 Control and status registers.336. Packet formats416.1 Self-ID packet zero.416.2 Cycle master adjustment packet416.3
42、 Response packet .426.4 Global asynchronous stream packets (GASP).446.5 Net management message interception.456.6 Net management messages .466.7 UPDATE ROUTES message 557. Transaction routing and operations 577.1 Source bus (initial entry portal) 577.2 Intermediate buses 587.3 Destination bus (termi
43、nal exit portal) .607.4 Maximum forward time 617.5 Congestion management.628. Stream operations and routing658.1 Cycle timer synchronization .658.2 Net time 688.3 GASP routing and operations698.4 Listening portal operations (isochronous streams)708.5 Talking portal operations (isochronous streams).7
44、08.6 Isochronous stream connection management70Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. viiiCopyright 2005 IEEE. All rights reserved.8.7 Common Isochronous Packet (CIP) format headers .869. Operations in
45、a bridged environment .899.1 CSR architecture assumptions 899.2 Bridge-aware devices899.3 Legacy devices .919.4 TIMEOUT message operations.919.5 Modifications to the BUS_TIME and CYCLE_TIME registers .939.6 Remote access to core and bus-dependent CSRs 9310. Net update 9510.1 Power reset initializati
46、on 9510.2 Bus reset operations9510.3 Coherency during net update 10110.4 Mute bridge portals.10210.5 Route map updates10310.6 Net panic.10711. Global node ID management10911.1 Virtual ID management.10911.2 Bus ID management 111Annex A (normative) Net correctness properties . 115Annex B (normative) M
47、inimum Serial Bus capabilities for bridge portals 117Annex C (normative) Pseudocode data structures and constants . 119Annex D (normative) Transaction routing 127Annex E (nomative) Discovery and enumeration protocol (DEP) . 135Annex F (normative) Plug control registers 143Annex G (informative) Bus t
48、opology analysis . 149Annex H (informative) Sample configuration ROM 159Annex I (informative) Bibliography . 161Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 4, 2010 at 13:32 from IEEE Xplore. Restrictions apply. Copyright 2005 IEEE. All rights reserved. 1IEEE Sta
49、ndard forHigh Performance Serial Bus Bridges1. Overview1.1 ScopeThis is a full-use standard whose scope is to extend the already defined asynchronous and isochronous services of HighPerformance Serial Bus beyond the local bus by means of a device, the bridge, which consists of two nodes, eachconnected to a separate bus and both interconnected by implementation-dependent means.The project is intended to standardize the model, definition, and behaviors of High Performance Serial Bus
