{"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\/pt\/blog\/news\/gotov-k-proizvodstvu-pervyj-prototip-otkrytogo-chipa-libre-soc","title":{"rendered":"O primeiro prot\u00f3tipo do chip aberto Libre-SOC est\u00e1 pronto para produ\u00e7\u00e3o.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

O projeto Libre-SOC, que desenvolve um chip aberto com a implementa\u00e7\u00e3o de uma arquitetura h\u00edbrida no estilo CDC 6600, onde as instru\u00e7\u00f5es de CPU, VPU e GPU n\u00e3o s\u00e3o separadas e s\u00e3o oferecidas em uma \u00fanica ISA para reduzir o tamanho e a complexidade do chip, atingiu a fase de transfer\u00eancia para a produ\u00e7\u00e3o do primeiro prot\u00f3tipo de teste. Inicialmente, o projeto era conhecido como Libre RISC-V, mas foi renomeado para Libre-SOC ap\u00f3s a decis\u00e3o de substituir o RISC-V pelo uso da arquitetura de conjunto de instru\u00e7\u00f5es (ISA) OpenPOWER 3.0. <\/p>\n

O projeto visa criar um sistema em chip (SoC) completo, totalmente aberto e sem taxas de licenciamento, que possa ser utilizado em computadores de placa \u00fanica, netbooks e diversos dispositivos port\u00e1teis. Al\u00e9m das instru\u00e7\u00f5es e registradores de CPU, o Libre-SOC fornece, em um \u00fanico bloco funcional do processador, capacidades para realizar opera\u00e7\u00f5es vetoriais e c\u00e1lculos especializados, t\u00edpicos de VPU e GPU. O chip utiliza a arquitetura do conjunto de instru\u00e7\u00f5es OpenPOWER, a extens\u00e3o Simple-V com instru\u00e7\u00f5es para vetoriza\u00e7\u00e3o e processamento paralelo de dados, al\u00e9m de instru\u00e7\u00f5es especializadas para convers\u00e3o em ARGB e execu\u00e7\u00e3o de opera\u00e7\u00f5es 3D padr\u00e3o. <\/p>\n

As instru\u00e7\u00f5es da GPU est\u00e3o focadas em seu uso com a API gr\u00e1fica Vulkan, enquanto a VPU se concentra na acelera\u00e7\u00e3o da convers\u00e3o YUV-RGB e decodifica\u00e7\u00e3o de formatos MPEG1\/2, MPEG4 ASP (xvid), H.264, H.265, VP8, VP9, AV1, MP3, AC3, Vorbis e Opus. Para o Mesa, est\u00e1 sendo desenvolvido um driver livre que utiliza as capacidades do Libre-SOC para fornecer uma implementa\u00e7\u00e3o de software acelerada por hardware da API gr\u00e1fica Vulkan. Por exemplo, os shaders Vulkan podem ser traduzidos usando um motor JIT para execu\u00e7\u00e3o com as instru\u00e7\u00f5es especializadas dispon\u00edveis no Libre-SOC. <\/p>\n

No pr\u00f3ximo prot\u00f3tipo de teste, planeja-se implementar a extens\u00e3o SVP64 (Vetoriza\u00e7\u00e3o de Comprimento Vari\u00e1vel), permitindo que o Libre-SOC seja utilizado como um processador vetorial (al\u00e9m de 32 registradores de 64 bits de uso geral, ser\u00e3o disponibilizados 128 registradores para c\u00e1lculos vetoriais). O primeiro prot\u00f3tipo inclui apenas um n\u00facleo, operando a 300 Mhz, mas ao longo de dois anos, planeja-se lan\u00e7ar uma vers\u00e3o de 4 n\u00facleos, depois uma de 8 n\u00facleos, e, a longo prazo, uma vers\u00e3o de 64 n\u00facleos. <\/p>\n

A primeira remessa do chip ser\u00e1 produzida pela TSMC utilizando o processo de 180nm. Todos os avan\u00e7os do projeto est\u00e3o dispon\u00edveis sob licen\u00e7as livres, incluindo arquivos no formato GDS-II com a descri\u00e7\u00e3o completa da topologia do chip, suficiente para iniciar a pr\u00f3pria produ\u00e7\u00e3o. O Libre-SOC ser\u00e1 o primeiro chip totalmente independente baseado na arquitetura Power, produzido fora da IBM. Para o desenvolvimento, foi utilizado a linguagem de descri\u00e7\u00e3o de hardware nMigen (HDL baseada em Python, sem o uso de VHDL e Verilog), a biblioteca de c\u00e9lulas padr\u00e3o FlexLib do projeto Chips4Makers e a ferramenta VLSI livre Coriolis2 para convers\u00e3o de HDL para GDS-II. <\/p>\n

O desenvolvimento do Libre-SOC foi financiado pela funda\u00e7\u00e3o NLnet Foundation, que destinou 400 mil euros para a cria\u00e7\u00e3o de um chip totalmente aberto no \u00e2mbito de um programa para o desenvolvimento de solu\u00e7\u00f5es t\u00e9cnicas fundamentais verific\u00e1veis e confi\u00e1veis. O chip tem o tamanho de 5.5×5.9 mm e inclui 130 mil portas l\u00f3gicas. Ele cont\u00e9m quatro m\u00f3dulos SRAM de 4KB e um bloco PLL de ajuste de fase de 300 MHz.

\"O<\/center>
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Fonte: 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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