Add riscv-rt to workspace

.github/workflows/changelog.yaml

@@ -19,6 +19,8 @@ jobs:
           filters: |
             riscv:
               - 'riscv/**'
+            riscv-rt:
+              - 'riscv-rt/**'
 
       - name: Check for CHANGELOG.md (riscv)
         if: steps.changes.outputs.riscv == 'true'
@@ -27,3 +29,11 @@ jobs:
           changeLogPath: ./riscv/CHANGELOG.md
           skipLabels: 'skip changelog'
           missingUpdateErrorMessage: 'Please add a changelog entry in the riscv/CHANGELOG.md file.'
+
+      - name: Check for CHANGELOG.md (riscv-rt)
+        if: steps.changes.outputs.riscv-rt == 'true'
+        uses: dangoslen/changelog-enforcer@v3
+        with:
+          changeLogPath: ./riscv-rt/CHANGELOG.md
+          skipLabels: 'skip changelog'
+          missingUpdateErrorMessage: 'Please add a changelog entry in the riscv-rt/CHANGELOG.md file.'

.github/workflows/clippy.yaml

@@ -1,6 +1,6 @@
 on:
   push:
-    branches: [ staging, trying, master ]
+    branches: [ master ]
   pull_request:
   merge_group:
 
@@ -14,28 +14,46 @@ jobs:
     strategy:
       matrix:
         toolchain: [ stable, nightly ]
-        cargo_flags:
-          - "--no-default-features"
-          - "--all-features"
         include:
           # Nightly is only for reference and allowed to fail
           - toolchain: nightly
             experimental: true
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.experimental || false }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.toolchain }}
           components: clippy
-      - name: Run clippy
-        run: cargo clippy --all ${{ matrix.cargo_flags }} -- -D warnings
+      - name: Run clippy (no features)
+        run: cargo clippy --all --no-default-features -- -D warnings
+      - name: Run clippy (all features)
+        run: cargo clippy --all --all-features -- -D warnings
+
+  # Additonal clippy checks for riscv-rt
+  clippy-riscv-rt:
+    strategy:
+      matrix:
+        toolchain: [ stable, nightly ]
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental || false }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          components: clippy
+      - name: Run clippy (s-mode)
+        run: cargo clippy --package riscv-rt --all --features=s-mode -- -D warnings
+      - name: Run clippy (single-hart)
+        run: cargo clippy --package riscv-rt --all --features=single-hart -- -D warnings
 
    # Job to check that all the lint checks succeeded
   clippy-check:
     needs:
     - clippy
+    - clippy-riscv-rt
     runs-on: ubuntu-latest
     if: always()
     steps:

.github/workflows/label.yaml

@@ -0,0 +1,17 @@
+name: Check Labels
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+jobs:
+  label-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: mheap/github-action-required-labels@v5
+        with:
+          mode: exactly
+          count: 0
+          labels: "work in progress, do not merge"
+          add_comment: true
+          message: "This PR is being prevented from merging because it presents one of the blocking labels: {{ provided }}."

.github/workflows/riscv-rt.yaml

@@ -0,0 +1,52 @@
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+  merge_group:
+
+name: Build check (riscv-rt)
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        # All generated code should be running on stable now, MRSV is 1.59.0
+        toolchain: [ stable, nightly, 1.59.0 ]
+        target:
+          - riscv32i-unknown-none-elf
+          - riscv32imc-unknown-none-elf
+          - riscv32imac-unknown-none-elf
+          - riscv64imac-unknown-none-elf
+          - riscv64gc-unknown-none-elf
+        example:
+          - empty
+          - multi_core
+        include:
+          # Nightly is only for reference and allowed to fail
+          - toolchain: nightly
+            experimental: true
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental || false }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          targets: ${{ matrix.target }}
+      - name: Build (no features)
+        run: RUSTFLAGS="-C link-arg=-Triscv-rt/examples/device.x" cargo build --package riscv-rt --target ${{ matrix.target }} --example ${{ matrix.example }}
+      - name : Build example (s-mode)
+        run: RUSTFLAGS="-C link-arg=-Triscv-rt/examples/device.x" cargo build --package riscv-rt --target ${{ matrix.target }} --example ${{ matrix.example }} --features=s-mode
+      - name : Build example (single-hart)
+        run: RUSTFLAGS="-C link-arg=-Triscv-rt/examples/device.x" cargo build --package riscv-rt --target ${{ matrix.target }} --example ${{ matrix.example }} --features=single-hart
+      - name: Build example (all features)
+        run: RUSTFLAGS="-C link-arg=-Triscv-rt/examples/device.x" cargo build --package riscv-rt --target ${{ matrix.target }} --example ${{ matrix.example }} --all-features
+
+  # Job to check that all the builds succeeded
+  build-check:
+    needs:
+    - build
+    runs-on: ubuntu-latest
+    if: always()
+    steps:
+      - run: jq --exit-status 'all(.result == "success")' <<< '${{ toJson(needs) }}'

.github/workflows/build.yaml → .github/workflows/riscv.yaml

@@ -1,10 +1,10 @@
 on:
   push:
-    branches: [ staging, trying, master ]
+    branches: [ master ]
   pull_request:
   merge_group:
 
-name: Build check
+name: Build check (riscv)
 
 jobs:
   # We check that the crate builds and links for all the toolchains and targets.
@@ -19,37 +19,36 @@ jobs:
           - riscv32imac-unknown-none-elf
           - riscv64imac-unknown-none-elf
           - riscv64gc-unknown-none-elf
-        cargo_flags: [ "--no-default-features", "--all-features" ]
         include:
           # Nightly is only for reference and allowed to fail
           - toolchain: nightly
             experimental: true
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.experimental || false }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@master
       with:
         toolchain: ${{ matrix.toolchain }}
         targets: ${{ matrix.target }}
-    - name: Build library
-      run: cargo build --target ${{ matrix.target }} ${{ matrix.cargo_flags }}
+    - name: Build (no features)
+      run: cargo build --package riscv --target ${{ matrix.target }}
+    - name: Build (all features)
+      run: cargo build --package riscv --target ${{ matrix.target }} --all-features
 
   # On MacOS, Ubuntu, and Windows, we at least make sure that the crate builds and links.
   build-others:
     strategy:
       matrix:
-        os:
-          - macos-latest
-          - ubuntu-latest
-          - windows-latest
-        cargo_flags: [ "--no-default-features", "--all-features" ]
+        os: [ macos-latest, ubuntu-latest, windows-latest ]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
-      - name: Build crate for host OS
-        run: cargo build ${{ matrix.cargo_flags }}
+      - name: Build (no features)
+        run: cargo build --package riscv
+      - name: Build (all features)
+        run: cargo build --package riscv --all-features
 
   # Job to check that all the builds succeeded
   build-check:

.github/workflows/rustfmt.yaml

@@ -1,6 +1,6 @@
 on:
   push:
-    branches: [ staging, trying, master ]
+    branches: [ master ]
   pull_request:
   merge_group:
 
@@ -10,7 +10,7 @@ jobs:
   rustfmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt

Cargo.toml

@@ -2,4 +2,5 @@
 resolver = "2"
 members = [
     "riscv",
+    "riscv-rt",
 ]

README.md

@@ -1,41 +1,26 @@
-[![crates.io](https://img.shields.io/crates/d/riscv.svg)](https://crates.io/crates/riscv)
-[![crates.io](https://img.shields.io/crates/v/riscv.svg)](https://crates.io/crates/riscv)
-[![Build Status](https://travis-ci.org/rust-embedded/riscv.svg?branch=master)](https://travis-ci.org/rust-embedded/riscv)
+# RISC-V crates
 
-# `riscv`
+This repository contains various crates useful for writing Rust programs on RISC-V microcontrollers:
 
-> Low level access to RISC-V processors
+* [`riscv`]: CPU peripheral access and intrinsics
+* [`riscv-rt`]: Startup code and interrupt handling
 
-This project is developed and maintained by the [RISC-V team][team].
-
-## [Documentation](https://docs.rs/crate/riscv)
-
-## Minimum Supported Rust Version (MSRV)
-
-This crate is guaranteed to compile on stable Rust 1.60 and up. It *might*
-compile with older versions but that may change in any new patch release.
 
-## License
-
-Copyright 2019-2022 [RISC-V team][team]
+This project is developed and maintained by the [RISC-V team][team].
 
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
+### Contribution
 
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
+Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the
+work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
+additional terms or conditions.
 
 ## Code of Conduct
 
 Contribution to this crate is organized under the terms of the [Rust Code of
 Conduct][CoC], the maintainer of this crate, the [RISC-V team][team], promises
 to intervene to uphold that code of conduct.
 
-[CoC]: CODE_OF_CONDUCT.md
+[`riscv`]: https://crates.io/crates/riscv
+[`riscv-rt`]: https://crates.io/crates/riscv-rt
 [team]: https://github.com/rust-embedded/wg#the-risc-v-team
+[CoC]: CODE_OF_CONDUCT.md