X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=3d_gpu.mdwn;h=104b7a2c0a96ae3e312fd8d0c2c679de79369665;hb=e276e8bb64adf5cb91fedd4d8cdde695d7c56bc0;hp=cf83746b2f669b34a104a5b81001dc38d7aae7fa;hpb=da6760f970862160f3cb408ad26587324896ce6c;p=libreriscv.git diff --git a/3d_gpu.mdwn b/3d_gpu.mdwn index cf83746b2..104b7a2c0 100644 --- a/3d_gpu.mdwn +++ b/3d_gpu.mdwn @@ -2,24 +2,107 @@ Note: this is a **hybrid** CPU, VPU and GPU. It is not, as many news articles are implying, a "dedicated exclusive GPU". The option exists to **create** -a stand-alone GPU product. It is being *designed* to be a **complete** -all-in-one processor (System-on-a-Chip). +a stand-alone GPU product (contact us if this is a product that you want). +Our primary goal is to design a **complete** all-in-one processor +(System-on-a-Chip) that happens to include libre-licensed VPU and GPU +accelerated instructions as part of the actual - main - CPU itself. -We seek investors, sponsors, engineers and potential customers, who are -interested in the creation and use of an entirely libre low-power mobile -class system-on-a-chip. Comparative benchmark performance, pincount and -price is the Allwinner A64, except that the power budget target is 2.5 watts -in a 16x16mm 320 to 360 pin 0.8mm FBGA package. +We seek investors, sponsors (whose contributions thanks to NLNet may be +tax-deductible), engineers and potential customers, who are +interested, as a first product, in the creation and use of an entirely +libre low-power mobile class system-on-a-chip. Comparative benchmark +performance, pincount and price is the Allwinner A64, except that the +power budget target is 2.5 watts in a 16x16mm 320 to 360 pin 0.8mm +FBGA package. Instead of single-issue higher clock rate, the design is +multi-issue, aiming for around 800mhz. -See: +The lower pincount, lower power, and higher BGA pitch is all to reduce +the cost of product development when it comes to PCB design and layout: -* [[libre_3d_gpu]] +* Above 4 watts requires metal packages, greater attention to thermal + management in the PCB design and layout, and much pricier PMICs. +* 0.6mm pitch BGA and below requires much more expensive PCB manufacturing + equipment and more costly PCBA techniques. +* Above 600 pins begins to reduce production yields as well as increase + the cost of testing and packaging. + +We can look at larger higher-power ASICs either later or, if funding +is made available, immediately. + +Recent applications to NLNet (Oct 2019) are for a test chip in 180nm, +64 bit, single core dual issue, around 300 to 350mhz. This will provide +the confidence to go to higher geometries, as well as be a commercially +viable embedded product in its own right. + +# Business Objectives + +See [[3d_gpu/business_objectives]] + +* the project shall be a hybrid CPU-GPU-VPU +* the project shall be commercial and mass-volume (100 million units + and above) +* the project shall be entirely transparent so that end-users will be + able to trust it +* the source code shall be available at all times for all components + for BUSINESS reasons, making development and use of SDKs dead simple + and aiding and assisting developers AND BUSINESSES in debugging and thus + hugely saving them money. + +Reasoning: + +* If the processor is not a hybrid CPU-GPU-VPU, the + complexity involved in developing a split shared-memory CPU-GPU both + at a hardware and a software level will be so costly it will jeapordise + the project. +* The project is commercial and mass-volume because there are plenty + of academic designs (none of them reaching production where people + may benefit), and "Open" designs, created by the Open Hardware + Community, sadly due to the high cost of producing ASICs, tend to be + focussed on markets that would have been great about twenty to thirty + years ago. +* Transparency is a key business objective. It is a Unique Selling Point + that the processor is developed in a fashion that, should it be + independently audited, no opportunity for spying back-door co-processors + will be found to have "made their way surreptitiously - or overtly - + into the design". Yes, GCHQ: I know about the conversation you had + with nCipher (and, to their everlasting credit, that they told you + to take a hike) + +# Links: + +* [[shakti/m_class/libre_3d_gpu]] * [[discussion]] -* -* +* [[resources]] +* [[overview]] +* [[3d_gpu/funding]] +* [[3d_gpu/architecture]] +* Founding [[charter]] +* Mailing list +* Crowdsupply page +* Wiki +* Git repositories +* Bugtracker +* Kazan Vulkan Driver (including 3D engine) +* [NLNet 2019 Milestones](http://bugs.libre-riscv.org/buglist.cgi?columnlist=assigned_to%2Cbug_status%2Cresolution%2Cshort_desc%2Ccf_budget&f1=cf_nlnet_milestone&o1=equals&query_format=advanced&resolution=---&v1=NLnet.2019.02) +* NLNet Project Page +* [[nlnet_proposals]] -Progress: +# Progress: +* Dec 2019: Second round NLNet questions answered. External Review completed. 6 NLNet proposals accepted (EUR 200,000+) +* Nov 2019: Alternative FP library to Berkeley softfloat developed. NLNet first round questions answered. +* Oct 2019: 3D Standards continued. POWER ISA considered. Open 3D Alliance begins. NLNet funding applications submitted. +* Sep 2019: 3D Standards continued. Additional NLNet Funding proposals discussed. +* Aug 2019: Development of "Transcendentals" (SIN/COS/ATAN2) Specifications +* Jul 2019: Sponsorship from Purism received. IEEE754 FP Mul, Add, DIV, + FCLASS and FCVT pipelines completed. +* Jun 2019: IEEE754 FP Mul, Add, and FSM "DIV" completed. +* May 2019: 6600-style scoreboard started +* Apr 2019: NLnet funding approved by independent review committee +* Mar 2019: NLnet funding application first and second phase passed +* Mar 2019: First successful nmigen pipeline milestone achieved with IEEE754 FADD +* Feb 2019: Conversion of John Dawson's IEEE754 FPU to nmigen started +* Jan 2019: Second version Simple-V preliminary proposal (suited to LLVM) * 2017 - Nov 2018: Simple-V specification preliminary draft completed * Aug 2018 - Nov 2018: spike-sv implementation of draft spec completed * Aug 2018: Kazan Vulkan Driver initiated @@ -29,6 +112,7 @@ Progress: # News Articles +* * * * @@ -40,3 +124,57 @@ Progress: * * * +* +* +* +* +* +* +* +* +* +* +* +* + +# Information Resources and Tutorials + +* +* +* +* +* +* +* +* +* +* +* - +* +* +* +* +* +* +* +* +* +* +* +* +* +* +* +* +* Fundamentals of Modern VLSI Devices + +# Analog Simulation + +* +* +* +* + +# Evaluations + +*[[openpower]]