RISC-V：讀作risk-five毁习，是一個開源的CPU指令集架構(gòu)
zephyr：開源操作系統(tǒng)
linux：沒什么好說的旋奢。
risc-pk：The RISC-V Proxy Kernel。解釋如下：is a lightweight application execution environment that can host statically-linked RISC-V ELF binaries.? It is designed to support tethered RISC-V implementations with limited I/O capability and and thus handles I/O-related system calls by proxying them to a host computer.
BBL ：the Berkeley Boot Loader忿偷。
linux相關(guān)開源基礎(chǔ)庫對RISC-V的支持
binutils: upstreamed (2.28 is the first release with RISC-V support)
gcc: upstreamed (7.1 is the first release with RISC-V support)
glibc: upstreamed (2.27 is the first release with RISC-V support)
linux kernel: upstreamed (the architecture core code went into
kernel 4.15; kernel 4.19 contains all drivers necessary for booting a
simulated system to userland)
gdb: upstreamed in master (in the release process)
qemu: upstreamed (2.12 is the first release with RISC-V support)
