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@riscv-non-isa

RISC-V Non-ISA Specifications

The Open-Standard Instruction Set Architecture
README.md

Welcome to the RISC-V Non-ISA Specifications 👋

RISC-V Logo

Non-ISA specifications do not add new instructions, create or change opcodes, or in any way modify the RISC-V ISA. They do help us to develop an ecosystem around the ISA Specifications.

Things you'll find here include:

  • ABI Documentation
  • Architecture Tests
  • Specifications like Debug, Processor Trace, and Software Interrupts

If you don't find what you're looking for here, try one of our other GitHub organizations:

Popular repositories Loading

  1. riscv-asm-manual riscv-asm-manual Public

    RISC-V Assembly Programmer's Manual

    Makefile 1.6k 250

  2. riscv-elf-psabi-doc riscv-elf-psabi-doc Public

    A RISC-V ELF psABI Document

    Python 806 178

  3. riscv-arch-test riscv-arch-test Public

    Assembly 597 238

  4. riscv-sbi-doc riscv-sbi-doc Public

    Documentation for the RISC-V Supervisor Binary Interface

    Makefile 434 98

  5. rvv-intrinsic-doc rvv-intrinsic-doc Public

    C 347 105

  6. riscv-trace-spec riscv-trace-spec Public

    RISC-V Processor Trace Specification

    C 194 57

Repositories

Showing 10 of 35 repositories
  • riscv-rpmi Public

    RISC-V Platform Management Interface Specification. OS-agnostic messaging interface for system management and control

    riscv-non-isa/riscv-rpmi’s past year of commit activity
    Makefile 15 CC-BY-4.0 12 2 2 Updated Oct 15, 2025
  • riscv-sbi-doc Public

    Documentation for the RISC-V Supervisor Binary Interface

    riscv-non-isa/riscv-sbi-doc’s past year of commit activity
    Makefile 434 CC-BY-4.0 98 13 3 Updated Oct 15, 2025
  • riscv-asm-manual Public

    RISC-V Assembly Programmer's Manual

    riscv-non-isa/riscv-asm-manual’s past year of commit activity
    Makefile 1,565 CC-BY-4.0 250 9 10 Updated Oct 15, 2025
  • server-soc Public

    The repo holds the draft non-ISA Server SoC specification being developed by the Server SoC specification TG and to release intermediate releases of the specification on milestones. Further downstream this repo will be used to release specifications for public review.

    riscv-non-isa/server-soc’s past year of commit activity
    TeX 26 CC-BY-4.0 13 6 4 Updated Oct 15, 2025
  • riscv-iommu Public

    RISC-V IOMMU Specification

    riscv-non-isa/riscv-iommu’s past year of commit activity
    C 136 CC-BY-4.0 29 5 2 Updated Oct 15, 2025
  • riscv-arch-test Public
    riscv-non-isa/riscv-arch-test’s past year of commit activity
    Assembly 597 Apache-2.0 238 65 41 Updated Oct 15, 2025
  • iopmp-spec Public

    This repository contains the specification source for the RISC-V IOPMP Specification. This document proposes a Physical Memory Protection Unit of Input/Output devices, IOPMP for short, to regulate the accesses issued from the bus masters.

    riscv-non-isa/iopmp-spec’s past year of commit activity
    C 35 CC-BY-4.0 9 0 1 Updated Oct 14, 2025
  • riscv-c-api-doc Public

    Documentation of the RISC-V C API

    riscv-non-isa/riscv-c-api-doc’s past year of commit activity
    Makefile 77 CC-BY-4.0 47 17 3 Updated Oct 13, 2025
  • riscv-toolchain-conventions Public

    Documenting the expected behaviour and supported command-line switches for GNU and LLVM based RISC-V toolchains

    riscv-non-isa/riscv-toolchain-conventions’s past year of commit activity
    Makefile 152 CC-BY-4.0 42 10 0 Updated Oct 13, 2025
  • hart-trace-interface Public

    This Fast-Track will extract the Hart-Trace Interface chapter from the E-Trace spec and turn it into a standalone spec

    riscv-non-isa/hart-trace-interface’s past year of commit activity
    Makefile 1 CC-BY-4.0 2 8 10 Updated Oct 13, 2025
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