RISC-V port

RISC-V Instruction-Set Cheatsheet

 A very interesting guy ..

https://itnext.io/risc-v-instruction-set-cheatsheet-70961b4bbe8

The RISC-V Linux User's Manual

Interesting summary of Linux port

https://www.ocf.berkeley.edu/~qmn/linux/riscv.html

Context switch on RISC-V

Links to Linux and FreeRTOS internals

https://forums.sifive.com/t/context-switch-on-risc-v/3624

IoT OS on RISC-V with RT-Thread

a more close to what you do..

https://riscv.org/wp-content/uploads/2018/07/Shanghai-1640_RT-ThreadinRISC-V-06029.pdf

https://www.cnx-software.com/2020/02/25/getting-started-with-rt-thread-iot-os-nano-rtos-on-risc-v-processors/

SiFive's An Introduction to the RISC-V Architecture

https://cdn2.hubspot.net/hubfs/3020607/An%20Introduction%20to%20the%20RISC-V%20Architecture.pdf