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docs/Chipyard-Basics/Initial-Repo-Setup.rst

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+Initial Repository Setup
+========================================================
+
+Checking out the sources
+------------------------
+
+After cloning this repo, you will need to initialize all of the submodules.
+
+.. code-block:: shell
+
+    git clone https://github.com/ucb-bar/chipyard.git
+    cd chipyard
+    ./scripts/init-submodules-no-riscv-tools.sh
+
+Building a Toolchain
+------------------------
+
+The `toolchains` directory contains toolchains that include a cross-compiler toolchain, frontend server, and proxy kernel, which you will need in order to compile code to RISC-V instructions and run them on your design.
+Currently there are two toolchains, one for normal RISC-V programs, and another for Hwacha (``esp-tools``).
+There are detailed instructions at https://github.com/riscv/riscv-tools to install the ``riscv-tools`` toolchain, however, the instructions are similar for the Hwacha ``esp-tools`` toolchain.
+But to get a basic installation, just the following steps are necessary.
+
+.. code-block:: shell
+
+    ./scripts/build-toolchains.sh riscv # for a normal risc-v toolchain
+
+    # OR
+
+    ./scripts/build-toolchains.sh esp-tools # for a modified risc-v toolchain with Hwacha vector instructions
+
+Once the script is run, a ``env.sh`` file is emitted at sets the ``PATH``, ``RISCV``, and ``LD_LIBRARY_PATH`` environment variables.
+You can put this in your ``.bashrc`` or equivalent environment setup file to get the proper variables.
+These variables need to be set for the make system to work properly.