Your agile open source HW stinks (because it is not a system)

Taylor, Michael

doi:10.1145/3400302.3415791

Cited by 1 publication

(1 citation statement)

References 18 publications

(13 reference statements)

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“…Due to the limited amount of memory, MCUs can only support lightweight real-time Operating Systems (OS) or custom bare-metal runtimes. On the other hand, to support full-fledged OSs (e.g., Linux) and provide access to high-level software libraries, SBCs feature application-class cores, like multi-core ARM Cortex-A processors [3], GPUs, and GBytes of high-performance off-chip LPDDR/DDR/3/4/5 memories, with dedicated large (few mm 2 in 22 nm node [4]), mixedsignal, proprietary and expensive (> 300 thousands dollars [5]) on-chip PHY controllers, ending up with a power envelope of few Watts.…”

Section: Introductionmentioning

confidence: 99%

HULK-V: a Heterogeneous Ultra-low-power Linux capable RISC-V SoC

Valente

Tortorella

Sinigaglia

et al. 2023

2023 Design, Automation &Amp; Test in Europe Conference &Amp; Exhibition (DATE)

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IoT applications span a wide range in performance and memory footprint, under tight cost and power constraints. High-end applications rely on power-hungry Systems-on-Chip (SoCs) featuring powerful processors, large LPDDR/DDR3/4/5 memories, and supporting full-fledged Operating Systems (OS). On the contrary, low-end applications typically rely on Ultra-Low-Power µcontrollers with a "close to metal" software environment and simple micro-kernel-based runtimes. Emerging applications and trends of IoT require the "best of both worlds": cheap and low-power SoC systems with a well-known and agile software environment based on full-fledged OS (e.g., Linux), coupled with extreme energy efficiency and parallel digital signal processing capabilities. We present HULK-V: an open-source Heterogeneous Linux-capable RISC-V-based SoC coupling a 64bit RISC-V processor with an 8-core Programmable Multi-Core Accelerator (PMCA), delivering up to 13.8 GOps, up to 157 GOps/W and accelerating the execution of complex DSP and ML tasks by up to 112× over the host processor. HULK-V leverages a lightweight, fully digital memory hierarchy based on HyperRAM IoT DRAM that exposes up to 512 MB of DRAM memory to the host CPU. Featuring HyperRAMs, HULK-V doubles the energy efficiency without significant performance loss compared to featuring power-hungry LPDDR memories, requiring expensive and large mixed-signal PHYs. HULK-V, implemented in Global Foundries 22nm FDX technology, is a fully digital ultra-low-cost SoC running a 64-bit Linux software stack with OpenMP hostto-PMCA offload within a power envelope of just 250 mW.

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Section: Introductionmentioning

confidence: 99%