Check this "See MIPS Run" book on porting Linux to MIPS [1]. Since MIPS has becomes RISC-V, it will be an excellent reference to Linux on RISC-V platform [2].

[1]https://www.amazon.com/Morgan-Kaufmann-Computer-Architecture...

[2]https://www.eejournal.com/article/wait-what-mips-becomes-ris...

You might find the following useful.

* Network Algorithmics,: An Interdisciplinary Approach to Designing Fast Networked Devices - https://www.amazon.com/Network-Algorithmics-Interdisciplinar...

* See MIPS Run - https://www.amazon.com/Morgan-Kaufmann-Computer-Architecture...

* UNIX Systems for Modern Architectures: Symmetric Multiprocessing and Caching for Kernel Programmers - https://www.amazon.com/UNIX-Systems-Modern-Architectures-Mul...

* Advanced UNIX Programming - https://www.amazon.com/Advanced-UNIX-Programming-Marc-Rochki...

I love MIPS. I think it's an absolutely beautiful architecture. I used write MIPS code on my Play Station 2 with Linux dev kit for fun.

If you want to know more about the MIPS architecture I highly recommend "See MIPS Run" by Dominic Sweetman:

http://www.amazon.com/Morgan-Kaufmann-Computer-Architecture-...