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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
The SBI console stuff are deprecated with no replacements. And if you checkout https://github.com/riscv/riscv-platform-specs/blob/main/riscv-platform-spec.adoc, OS kernels really are expected to just find a 8250 or 16550 in the device tree, or as mentioned in a few other comments, use UEFI.
IIUC, U-Boot has enough UEFI to work as a bootloader, and EDK2 is a work-in-progress: https://github.com/riscv-admin/riscv-uefi-edk2-docs
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