\item {\bf iMX6}: Libre bootable, Vivante 3D GPU (libre etnaviv)
but proprietary VPU (and a power-hungry Cortex A9)
\item {\bf Allwinner SoCs}: mostly Libre bootable,
- VPU reverse-engineered; GPU: MALI or PowerVR (i.e. proprietary)
+ VPU reverse engineered; GPU: MALI or PowerVR (i.e. proprietary)
\item {\bf Rockchip SoCs}: good but using MALI or PowerVR.
\item {\bf TI OMAP}: good but using PowerVR. and expensive.
\item {\bf Samsung}: good but using MALI.
- \item {\bf Ingenic jz4775 }: GREAT! performance
+ \item {\bf Ingenic jz4775}: GREAT! performance
sucks (1ghz MIPS32).
- \item {\bf Broadcom SoCs }: Cartelled. and boots from the VPU
+ \item {\bf Broadcom SoCs}: Cartelled. and boots from the GPU
\end{itemize}
{\it Basically there does not exist one single commercial SoC that
provides full source code for all functions (CPU, GPU, VPU)
- with modern performance. Note: All of them sponge off of Open Source}
+ with modern performance. Which is kinda bizarre if you think about it}
+}
+
+
+\frame{\frametitle{So what's needed? What would a good (Libre) SoC have?}
+
+ \begin{itemize}
+ \item Cover a lot of different scenarios (embedded, tablets, industrial,
+ netbooks, crypto-currency mining).
+ \item Decent performance with high efficiency. RISC-V: 40 \%
+ more efficient than ARM / Intel. Shakti a good
+ candidate: 2.5ghz and 120mW per core @ 22nm.
+ \item 1080p video: y'all gotta watch cute kittens on youtube, right?
+ \item 3D GPU: y'all gotta play Angri Burds, right? (or Minecraft)
+ \item No spying back-door co-processors (to steal crypto-wallets)
+ \item No Spectres, no Meltdowns.
+ \end{itemize}
+ {\it Basically quite boring and mundane. No Monster Performance,
+ no AI stuff, no special sauce. Just a plain-old SoC,
+ 40\% more power efficient than ARM/Intel,
+ and not spying on end-users, that's all}
}
\item Without a desirable product or customer(s): err... you don't.\\
(cf: definition of Business)
\item By not having high NREs (leveraging back-to-back deals,
- and helping others fulfil their needs)
+ and helping others fulfil their needs and goals)
\end{itemize}
{\it Detachment from the goal also helps. If someone else makes this
product then GREAT! I can go do something else}
\item Customer entrapment (through proprietary software).\\
Strong business case for not entrapping customers:\\
https://tinyurl.com/most-productive-meeting-ever
- \item Funding, endorsing, supporting or otherwise empowering
- unethical Companies, Organisations and Individuals.\\
+ \item Funding, endorsing, supporting or empowering unethical
+ Companies, Organisations, Cartels and Individuals.\\
(cf: definition of an ethical act).
\item Being totally inflexible / unrealistic. Goals have
to be met: it's no good being an idiot about that. e.g. if
}
+\frame{\frametitle{Proprietary vs Libre-licensed Interface HDL}
+
+ \begin{itemize}
+ \item DDR3/4: challenging! \$1m for single-use, single instance\\
+ Symbiotic EDA: \$600k for PHY, CERN developed a Controller\\
+ http://libre-riscv.org/shakti/m\_class/DDR/
+ \item HyperRAM (JEDEC xSPI): lower risk than DDR3/4\\
+ http://libre-riscv.org/shakti/m\_class/HyperRAM/
+ \item RGMII: several available (saves \$50k)\\
+ http://libre-riscv.org/shakti/m\_class/RGMII/
+ \item UART, SPI, I2C, PWM, SD/MMC: all libre (except eMMC).
+ \item Shakti Group has FlexBus, QuadSPI, SRAM, many more.
+ \item RGB/TTL: R. Herveille (SSD2828, SN75LVDS83b, TFP410a)
+ \end{itemize}
+ {\it Basically there's no compelling reason to spend vast sums
+ on proprietary HDL. Sorry Cadence / Mentor / Synopsis / whoever}
+}
+
+
\frame{\frametitle{TODO}
\begin{itemize}