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OCP-IP Governing Steering Committee Meeting Portland, Oregon November 8, 2007

OCP-IP Governing Steering Committee Meeting Portland, Oregon November 8, 2007.

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OCP-IP Governing Steering Committee Meeting Portland, Oregon November 8, 2007

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  1. OCP-IPGoverning Steering Committee MeetingPortland, OregonNovember 8, 2007

  2. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew) 12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  3. Call to Order and Agenda Review (Ian) • Call to Order • Welcome from the President • Review Agenda • Any additional items? • Vote to approve last GSC Meeting Minutes • 24th GSC Meeting • 23 August 2007 • Mountain View, California

  4. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM:System Level Design WG (James) -TLM and SOW discussion9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  5. 1:40- 2:00 PM: 2007 Goals (Ian)2:00- 2:45 PM: AI Review (Ian) - ARM Discussion - DesignWare and CoreCreator Updates - Notification of Princeton Upgrade - Reminder to Request OCP Interfaces From Vendors - VSIA Issue - 2007 Outstanding Contributor Nominations2:45- 3:00 PM: Motion to Adjourn/ Break/ Reconvene 3:00- 3:15 PM: PR Update (Joe) - OCP Book Discussion Summary3:15- 3:25 PM: Recruiting Update (Joe) 3:25- 3:45 PM: 2008 Annual Budget (Ian)3:45- 4:00 PM: Administrative Update (VTM) 4:00- 4:05 PM: Enabling Resolution4:05- 4:15 PM: Collateral Review (VTM)4:15 PM: Motion to Adjourn

  6. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion 9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  7. Annual Meeting Saving Resolution / Elections (Ian) • Motion: • That it be resolved that all acts previously taken by any officer of the Corporation on behalf of the Corporation are approved, ratified, and confirmed, provided the acts were not inconsistent with the Corporation’s Articles of Incorporation or Bylaws, the California Corporations Code, or any other applicable law.

  8. Annual Meeting Saving Resolution / Elections (Ian) • Election of Officers: • Chairman • Secretary • President (does not require annual ratification as President’s term is ongoing at the pleasure of the board) • Confirmation of Named Directors (Terms are incremented at every annual meeting): • Takashi Yoshimori for Toshiba (3 years) • Ralph Morgan for Synopsys (3 years) • Vesa Lahtinen for Nokia (2 years) • James Aldis for Texas Instruments (1 years) • Drew Wingard for Sonics (1 years)

  9. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion 9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  10. Next GSC Meeting (Ian) • 26th GSC Meeting • Including Annual TVWG Strategic Planning Session (Typically 5 hour session day before GSC meeting) • January • Preferences for which week? • Preferences for location? • Tokyo is next in rotation

  11. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian)9:10- 9:40 AM:System Level Design WG (James) -TLM and SOW discussion9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  12. SLD WG Update Mark Burton (Greensocs), November 2007

  13. Overview • Overview Status for SLD • Goals from TVWG • Mid-term - unchanged.

  14. System Level Design WG Status • 2.2.1 release done and dusted • Numerous minor fixes • Adapters and monitors now OCP-2.2 compliant • CoWare and Sonics providing most of the effort • Next release planning awaiting developments • Will there be an OCP-2.3 • Do we have funds to do a major re-write for OSCI alignment

  15. TVWG status

  16. The SLD Mid-Term Vision - unchanged • OUR KIT IS HIGH QUALITY, AND STABLE. • Ensure that OCP users have a 'complete' modelling infrastructure available • multiple levels of abstraction (pure-functional to cycle-accurate) and use models (software development, architecture exploration, etc) • completeness means • bus interface , performance monitoring interface ,system debug interface and configuration interface • Make this modelling infrastructure standards compliant. • E.g. drive existing OCP-IP experience and expertise into OSCI-TLM • Maintain alignment between OSCI-TLM OCP-IP

  17. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  18. Functional Verification WG Status (Steve) • Performance Standard • Initiated FVWG discussions in January, participated in discussions with other WG in early February • Original Expected completion: End September 2007 • Currently making zero progress towards completion • Expected phases • Agreement on basic concepts (completed) • List of important events, measurements, etc. (review copy completed) • Structural document, including lists, charts, etc. (review copy completed) • Need to add ‘throughput’ • Throughput write-up generated, no feedback received from any of the WG members • Formatting by Technical Writer (on hold) • FVWG review, end September (on hold) • Good news: None since last GSC • Bad news: FVWG still extremely quiet • Protocol Compliance Clarification • General review and cleanup, etc., of the compliance sections • Expected completion: End September 2007 • Expected phases • Detailed review of ‘Compliance section’, end February • Detailed review of ‘Protocol Compliance Checks’, end April • Detailed review of ‘Configuration Compliance Checks’, end June • Detailed review of ‘Functional Coverage’, end August • Modifications completed by Technical Writer, end September • Status: Didn’t occur via expected phases, but several issues were identified and submitted as errata • Spec’n WG appears to be coming to closure on the errata • Compliance sections will be in good shape once errata resolved

  19. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  20. Break

  21. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion 9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  22. OCP-IP Standard Debug Signals for IP-Blocks GSC Status Nov 08, 2007 Bob Uvacek Neal Stollon

  23. 4 5 6 7 8 9 10 11 12 1 April-June Work on a text matching the OCP-Standard April-June Publish articles, advertise, build opinion April-June (Synchronize result with other groups proposals) June-Aug Make reviews with all OCP Debug Reviewers September Propose it as standard Sept/Oct Publish it inside OCP for greater review Sept/Oct MCDS example in RTL, [not C++, not XML] December Release On-chip Debug-HW Signaling Standard 2007 on the OCP public website We are too weak to achieve this! OCP-IP Debug Interface Standard Roadmap

  24. Debug WG Status Nov 08 • Added debug example OCDS to OCP Debug Addendum • Writing simplified text of example -> TI review • OCP Document is separate addendum to OCP 2.2 standard • ITRI Donations delayed to end of University semester mid 08 • PLS Donations -> we got debug protocol definitions • Infineon Donations -> we got RTL code of MCDS interface • Infineon Intention (SPRINT solution publish in OCP end 08?)‏ • Outlook

  25. OCP Debug Document Structure • Add a Debug Socket part to the OCP Interface Standard 2.2 • Possible additional parts for the Debug Standardization in future • OCP Debug Socket Signals (our present work, yellow, OCP-IP) • DAS-API and Register Interface (as shown green in SLD, SPRINT) • JTAG and TRACE pin interface (as shown in pink, MIPI) • HW Debug Interface for EDA HW Debuggers (over JTAG, ITRI) • SLD Debug Channel abstraction and modeling in C++ (OSCI) ____________________________________________________________ • Result: First make it independent addendum then unite it with OCP 2.2

  26. Outlook Send out the standard text to OCP members for review in Aug -> Nov 07 • Reason for delay: Include MCDS debug example in OCP debug proposal Cover the Debug Example sub-systems by the WG members: • Two cores and OCP-Fabric, ITRI (delayed to 08) • Debug system MCDS, Infineon (by IP-Extreme, no OCP wrappers) • Crosstrigger, OCP Bus-Observer, OCP Bus-Master Cerberus, Infineon • Debug Register definitions (taken from MCDS, Nexus) • Debugger software, XML, PLS (by end 08 for SPRINT) Open Issues • OCP-Wrappers for MCDS paid by first customer of IP-Extreme • Multi-core Single-step ITRI • ESL models of all items (not desired in industry, bypassed on high level)

  27. ITRI-Donations • 2007 • Module Debug API (Debug registers) • DB API (ESL in question; HW-DB out of reach) • Single-step hardware and synchronous start • OCP Debug Seminar at year end • 2008 • Device/ICE API • Debugger API • OCP Seminar

  28. Not Defined Yet PLS Donations OCP Bus & Sockets MASTER SLAVE DEBUG HW-level Debug SW-level Debug S M D D S M D D S M D D S D SLD Virtual SoC Assertion DSP RISC IP MEM Simulation HW Debuggers FSDB Reader BusObsrv CrossTr Trace JTAG Soft Trace FSDB FSDB Writer JTAG DFT SCAN SW Debuggers C++ Channels CrossTr XML IP-XACT XML RISC M JTAG Embedded SW S XML Inference ? IP Assertion MEM JTAG TRACE BOX FSDB Reader Trace DSP D Hard Trace FSDB BusObsrv FSDB Writer RTL Physical SoC JTAG BOX SoC Debug Example - OCP

  29. PLS Donations DIF and DAS 2 Additional Helper Interfaces can be offered: Registers for SW and JTAG for HW community JTAG

  30. The OCP Debug Standard would make this activity obsolete! Infineon

  31. OCP-IP Debug Interface Standard Group • Contractor Bob Uvacek, Chair (ex. Pixelworks and Toshiba America) • HDL Dynamics (Ex. MIPS/FS2) Neal Stollon • TI Gilbert Laurenti • Toshiba CY Pei • OCP-IP contacts Ian Mackintosh, Jeff Phillips, Brian Sage Reviewing members • Nexus Neal Stollon, as focal interface • Sonics Stefan Goette, needs to be replaced • Cadence Mike Young, Ran Avinun • MIPI Rolf Kuehnis, Gary Swoboda • ITRI/Springsoft Alan Su, (Dr. Lee) • SPIRIT Neal Stollon, (Debug-WG Chair Anthony Berent, ARM) • PLS, Infineon Jens Braunes, Albrecht Mayer • MIPS Bruce Ableidinger

  32. RTL Hardware IP OCP-IP Debug Interface Standard C++ Models XML Interfaces OSCI SPIRIT 1) Reach that MIPS-Debug-HW could connect to ARM-core and opposite 2) Reach that Debug-Signals connect/plug to the System-Bus through Sockets 3) Reach that all IP-blocks, not just cores, can connect to the debug system 4) Reach that Debug-HW and DFT-HW “share” as much as possible OCP-IP Debug Interface Standard Goals MCDS-RTL OCP-Wrappers REGISTER Interface SPRINT DAS-API

  33. OCP Debug Signals (Debug Socket) Baseline Debug Socket Signals • 1149.1 JTAG - TCK, TMS, TDI, TDO - part of OCP 2.1 spec • Debug_reset, debug_reset_en • MReqDebug, Msuspend, DebugSerror, DebugCon, • NoSResp, ForceResp, ForceAbort, ForceAbortAck Function Specific Options • Cross Trigger Interfaces : Trigger_in_condition[n:0], Trigger_out_Action[n:0], Trigger_out_enable[n:0], Ext_trig _clk, Ext _condition[n:0], Ext _action[n:0] • Trace/Debug Synchronization : SyncRunSyncRunAck • Trace TraceTrigger[x] • TimeStamp Interfaces ts_clk ts_reset Target Application Specific Options • Power Management : PWRDomainStatus, CLKDomainStatus Extended response field [2:0] – No Power, No Clk • Security : MReqSecure, DebugMode[1:0] , TraceMode[1:0], TAPenable

  34. Debug Regs Debug Regs Debug Regs OCP- MCDS Wrappers 2 debug channels A, B active out of N possible channels CHIP PC Software OCP Data Addr Socket OCP Data Wrapper Memory Mapped Access SYS Debug CERBERUS Debug Master ICE BOX Core1 Core1 Debug Core+ MCDS Reg B OCP Interconnect Core2 Debug Server API 12 ports MCDS TRACE TAP TAP TRACE A B A A B B Core2 Debug JTAG API RDI Core+ MCDS Reg A USB Eth Par Ser JTAG TRACE Core3 Debug Core3 Run Control Socket Trace Socket Trigger Socket Power Security Socket OCP Debug Sockets OCP Trace Compress OCP Debug Wrapper

  35. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion 9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  36. NoC BWG Update for 2007 • White paper • Publish white paper on OCP-IP website – Feb (Done) • Publish white paper at NoC Symposium – May (Done) • Recruiting – 3Q07 • 5 university (Done) • 4 corporate (Done) • Specification • Outline developed – 1Q07 (Done) • First draft/reviews begin – 3Q07 • Release – 3Q07 – moved to 4Q07 • Conferences • DATE participation - workshop and NoC BWG meeting (Done) • NoC 2007 Symposium – paper and panel (Done) • VLSI Test Symposium (May 2007) – presentation (Done) • Benchmark development • Commence performance tests/manufacturing – 2Q07 (Done) • Complete initial development – 3Q07 • Beta release – 4Q07 (late) • Evaluation and benchmark reports complete – 4Q07

  37. NoC BWG Update Q4 2007 (Cristian) • Get feedback on benchmarks (application modeling) (Done) • Approve/release the first section of benchmarks format specifications (application and hardware modeling) • Call for benchmarks (NoC applications, circuits) • Get feedback for the second section (micro-benchmarks) • Approve/release the first section of benchmarks format specifications (application and hardware modeling)

  38. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion 9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing Collaboration With STARC

  39. Specification WG 2007 Plan Release OCP 3.0 by end ’07 comprising: • Cache Coherence extensions • Consensus profile(s) from key OCP-IP members for IP providers • Power management signaling (based on TI proposal) • (Tentative) New extensions from members (FPGA?)

  40. Specification WG Status • Cache coherence subgroup meeting regularly • Making progress, but somewhat delayed • Consensus profiles work largely agreed • 3 profiles overall • Simpler two profiles almost signed off • Significant challenge agreeing on “Advanced High-Speed” profile • Protocol extension being proposed • Power management signaling proposal from TI • Sonics and TI iterating/attempting to reach consensus

  41. Specification WG Issues • Cache coherence work will not finish until mid-’08 • Doesn’t appear to be a business issue for anyone • BUT, has been used against OCP by ARM and Power.org • Now looking at a few challenging questions • When to release next Specification • How to document and release new profiles • How to resolve proposed write model change

  42. Issue 1: Next Specification Release • Current proposed extensions are relatively minor • Power management (“OCP Disconnect”) • Potential write model extension • (Big) cache coherence work due in ~6-9 months • So: • Push out all extensions until 3.0 (wait for coherence) • Create small 2.3 release to cover • How concerned are we about Specification “churn”? • Proposal: defer extensions to 3.0; prepare Spec. documentation revision to cover profiles

  43. Issue 2: How to Publish New Profiles • Profiles are guidelines, not specification • Can release document revision without going to 2.3/3.0 • What form should the profile documentation take? • Parameter tables (cheap) • Separate document (very expensive) • Something in-between? • Proposal: document in new chapter/appendix • Concise description of features • Pointers into rest of Spec. for details

  44. Issue 3: Proposed Write Model Extension • Current Specification description • Whether all writes have responses (or not) • Whether write posting is explicit (or not) Proposal tochange this

  45. Proposal (Toshiba) • We propose a new definition for the combination of these two parameters as below • Configuration for no-use of the write response • (writeresp_enable，writenonpost_enable) = (0，0) • Configuration for use of the write response and no-use of the non-posted write • (writeresp_enable，writenonpost_enable) = (1，0) • Configuration for use of the non-posted write and no-use of the write response for the posted write • (writeresp_enable，writenonpost_enable) = (0，1) • Configuration for use of the non-posted write and use of the write response for the posted write • (writeresp_enable，writenonpost_enable) = (1，1) • This proposal means that it enables that the non-posted write can be used without using of the write response.

  46. Why is This Contentious? • Justifications in favor • Higher performance • Significant contention whether this is real • Easier to understand • New proposal more consistent with packet systems (PCIe) • Justifications against • Current OCP write model adopted in 2.0 • Significant investments around existing model • New proposal creates non-obvious choice for users • More difficult to understand? • New proposal not consistent with other on-chip interfaces • AMBA, CoreConnect, VCI - and PCI!

  47. Why is This Issue Being Raised to GSC? • First time where we have significant contention in Spec. WG! • Issue is blocking progress on consensus profiles • Would likely be included in advanced profile • Do we want to decide this by a WG vote? GSC vote?

  48. 8:15- 8:30 AM: Coffee Available8:30- 8:40 AM: Call to Order, Introductions, Agenda Review, Last Minutes (Ian)8:40- 9:05 AM: Annual Governance Resolution & Elections 9:05- 9:10 AM: Next GSC Meeting (Ian) 9:10- 9:40 AM: System Level Design WG (James) - TLM and SOW discussion 9:40- 10:10 AM: Functional Verification WG (Steve)10:10-10:30 AM: Motion to Adjourn/ Break/ Reconvene 10:30-11:00 AM: Debug WG (Bob)11:00-11:30 AM: NoC BWG Update (Cristian)11:30-12:00 PM: Specification WG Status (Drew) - Posted-write specification issue (Drew) - Cache Coherence SG Status (Drew)12:00-1:00 PM: Motion to Adjourn/ Lunch/ Reconvene1:00- 1:05 PM: Technical Vision WG Status / Restated (Ian) 1:05- 1:20 PM: Progress in Asia (Ian) 1:20- 1:40 PM: Japan Recruiting Plan (Nakada-san) - Maximizing CollaborationWith STARC

  49. Lunch

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