{"id":100740,"date":"2021-07-12T04:22:42","date_gmt":"2021-07-12T02:22:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/gotov-k-proizvodstvu-pervyj-prototip-otkrytogo-chipa-libre-soc"},"modified":"2021-07-12T04:22:42","modified_gmt":"2021-07-12T02:22:43","slug":"gotov-k-proizvodstvu-pervyj-prototip-otkrytogo-chipa-libre-soc","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/gotov-k-proizvodstvu-pervyj-prototip-otkrytogo-chipa-libre-soc","title":{"rendered":"Den f\u00f8rste prototype af den \u00e5bne chip Libre-SOC er klar til produktion","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Libre-SOC-projektet udvikler en \u00e5ben chip med en hybridarkitektur inspireret af CDC 6600, hvor CPU-, VPU- og GPU-instruktioner ikke er adskilt, men pr\u00e6senteres i \u00e9n ISA. Projektet har n\u00e5et stadiet for overf\u00f8rsel til produktion af den f\u00f8rste testprototype. Oprindeligt blev projektet udviklet under navnet Libre RISC-V, men blev omd\u00f8bt til Libre-SOC efter beslutningen om at skifte RISC-V ud med OpenPOWER 3.0 instruktionss\u00e6ttet. <\/p>\n

Projektet har til form\u00e5l at skabe et fuldt funktionelt, helt \u00e5bent og licensfrit system-on-a-chip (SoC), der kan anvendes i enkelt-kort computere, netbooks og forskellige b\u00e6rbare enheder. Udover de typiske CPU-instruktioner og generelle registre giver Libre-SOC i \u00e9n funktionel enhed processorens evner til at udf\u00f8re vektoroperationer og specialiserede beregninger, der typisk h\u00f8rer til VPU og GPU. Chippen anvender OpenPOWER-arkitekturen, Simple-V udvidelsen med instruktioner til vektorisering og parallel databehandling, samt specialiserede instruktioner til konvertering til ARGB og udf\u00f8relse af standard 3D-operationer. <\/p>\n

GPU-instruktionerne fokuserer p\u00e5 brug med den grafiske API Vulkan, mens VPU er dedikeret til at fremskynde konvertering fra YUV til RGB samt dekodning af formater som MPEG1\/2, MPEG4 ASP (xvid), H.264, H.265, VP8, VP9, AV1, MP3, AC3, Vorbis og Opus. Der udvikles en fri driver i Mesa, der udnytter kapaciteterne i Libre-SOC for at levere softwareimplementering af den grafiske API Vulkan med hardwareacceleration. For eksempel kan Vulkan-shaders overs\u00e6ttes ved hj\u00e6lp af en JIT-motor for at blive udf\u00f8rt med de specialiserede instruktioner, der er tilg\u00e6ngelige i Libre-SOC. <\/p>\n

I den n\u00e6ste testprototype planl\u00e6gges det at implementere SVP64-udvidelsen (Variable-length Vectorisation), som vil g\u00f8re det muligt at bruge Libre-SOC som en vektorprocessor (udover 32 64-bit generelle registre vil der blive stillet 128 registre til r\u00e5dighed for vektorberegninger). Den f\u00f8rste prototype inkluderer kun \u00e9n kerne, der k\u00f8rer ved 300 MHz, men inden for to \u00e5r planl\u00e6gges der at udgive en 4-kernet version, derefter en 8-kernet version, og p\u00e5 l\u00e6ngere sigt en 64-kernet version. <\/p>\n

Den f\u00f8rste batch af chippen vil blive produceret af TSMC ved hj\u00e6lp af 180nm teknologi. Alt materiale fra projektet distribueres under \u00e5bne licenser, herunder filer i GDS-II formatet, der beskriver den fulde topologi af chippen, tilstr\u00e6kkelig til at starte egen produktion. Libre-SOC bliver den f\u00f8rste fuldst\u00e6ndigt uafh\u00e6ngige chip baseret p\u00e5 Power-arkitekturen, produceret ikke af IBM. Under udviklingen blev der anvendt hardwarebeskrivelsessprog nMigen (HDL baseret p\u00e5 Python, uden brug af VHDL og Verilog), FlexLib standardcellebiblioteker fra Chips4Makers projektet og det gratis VLSI-v\u00e6rkt\u00f8j Coriolis2 til konvertering fra HDL til GDS-II. <\/p>\n

Udviklingen af Libre-SOC blev finansieret af NLnet Foundation, som afsatte 400.000 euro til at skabe en helt \u00e5ben chip som en del af et program til udvikling af verifiable og betroede fundamentale tekniske l\u00f8sninger. Chippet m\u00e5ler 5,5 \u00d7 5,9 mm og inkluderer 130.000 logiske porte. Det best\u00e5r af fire SRAM-moduler p\u00e5 4KB og en 300 MHz fase-l\u00e5se-sl\u00f8jfe (PLL) blok.

\"Den<\/center>
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Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u043e\u0435\u043a\u0442 Libre-SOC, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 \u0447\u0438\u043f \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u0433\u0438\u0431\u0440\u0438\u0434\u043d\u043e\u0439 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u0432 \u0441\u0442\u0438\u043b\u0435 CDC 6600, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0434\u043b\u044f \u0443\u043c\u0435\u043d\u044c\u0448\u0435\u043d\u0438\u044f \u0440\u0430\u0437\u043c\u0435\u0440\u0430 \u0438 \u0441\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0447\u0438\u043f\u0430 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0438 CPU, VPU \u0438 GPU \u043d\u0435 \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u044b \u0438 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u044b \u0432 \u043e\u0434\u043d\u043e\u043c ISA, \u0434\u043e\u0441\u0442\u0438\u0433 \u0441\u0442\u0430\u0434\u0438\u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0432 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u0442\u0435\u0441\u0442\u043e\u0432\u043e\u0433\u043e \u043e\u0431\u0440\u0430\u0437\u0446\u0430. \u0418\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043f\u0440\u043e\u0435\u043a\u0442 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u043b\u0441\u044f \u043f\u043e\u0434 \u0438\u043c\u0435\u043d\u0435\u043c Libre RISC-V, \u043d\u043e \u0431\u044b\u043b \u043f\u0435\u0440\u0435\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d \u0432 Libre-SOC \u043f\u043e\u0441\u043b\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u044f 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