Spacemit debug upstream The riscv-openocd fork currently supports RISC-V Debug Spec v0.11 and v0.13, and includes partial support for v1.0.
https://reddit.com/r/spacemit_riscv/comments/1p01pep/spacemit_debgug_upstream/
OpenOCD provides the actual implementation of the RISC-V Debug Specification.