Merge pull request #169 from sifive/documentation

Add initial documentation

5 files changed, 218 insertions, 0 deletions

diff --git a/doc/sphinx/userguide/benchmarking.rst b/doc/sphinx/userguide/benchmarking.rst
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+Benchmarking
+============
+
+The Dhrystone and CoreMark benchmarks are still only supported by the Legacy
+Freedom E SDK. When we port the benchmarks to Freedom Metal, we will update
+this section to describe the updated build steps.
+
+Dhrystone
+---------
+
+After setting up the software and debug toolchains, you can build and
+execute everyone's favorite benchmark as follows:
+
+- Compile the benchmark with the command ``make software TARGET=freedom-e300-hifive1 PROGRAM=dhrystone LINK_TARGET=dhrystone``. Note that a slightly different linker file is used for Dhrystone which stores read only data in DTIM instead of external flash.
+- Run on the HiFive1 board with the command ``make upload TARGET=freedom-e300-hifive1 PROGRAM=dhrystone``.
+  This will take a few minutes.  Sample output is provided below.
+- Compute DMIPS by dividing the Dhrystones per Second result by 1757, which
+  was the VAX 11/780's performance.  In the example below, 729927 / 1757 =
+  415 DMIPS.
+- Compute DMIPS/MHz by dividing by the clock rate: in the example below,
+  415 / 268 = 1.55 DMIPS/MHz.
+
+.. code-block:: none
+
+   core freq at 268694323 Hz
+
+   Dhrystone Benchmark, Version 2.1 (Language: C)
+
+   <snip>
+
+   Microseconds for one run through Dhrystone: 1.3
+   Dhrystones per Second:                      729927.0
+
+CoreMark
+--------
+
+We cannot distribute the CoreMark benchmark, but following are instructions
+to download and run the benchmark on the HiFive1 board:
+
+- Download CoreMark from EEMBC's web site and extract the archive from
+  `<http://www.eembc.org/coremark/download.php>`_.
+- Copy the following files from the extracted archive into the
+  ``software/coremark`` directory in this repository:
+
+  - ``core_list_join.c``
+  - ``core_main.c``
+  - ``coremark.h``
+  - ``core_matrix.c``
+  - ``core_state.c``
+  - ``core_util.c``
+
+- Compile the benchmark with the command ``make software PROGRAM=coremark``.
+- Run on the HiFive1 board with the command ``make upload PROGRAM=coremark``.
+- Divide the reported Iterations/Sec by the reported core frequency in MHz to
+  obtain a CoreMarks/MHz value.
diff --git a/doc/sphinx/userguide/buildingcoreip.rst b/doc/sphinx/userguide/buildingcoreip.rst
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+Building for SiFive CoreIP
+==========================
+
+Building an Example
+-------------------
+
+To compile a bare-metal RISC-V program:
+
+.. code-block:: bash
+
+   make BSP=mee [PROGRAM=hello] [TARGET=coreip-e31] software
+
+The square brackets in the above command indicate optional parameters for the
+Make invocation. As you can see, the default values of these parameters tell
+the build script to build the ``hello`` example for the ``coreip-e31`` target.
+If, for example, you wished to build the ``timer-interrupt`` example for the S51
+Core IP target, you would instead run the command
+
+.. code-block:: bash
+
+   make BSP=mee PROGRAM=timer-interrupt TARGET=coreip-s51 software
+
+Cleaning a Target Program Build Directory
+-----------------------------------------
+
+.. code-block:: bash
+
+   make BSP=mee [PROGRAM=hello] [TARGET=coreip-e31] clean
+
diff --git a/doc/sphinx/userguide/buildingdevboard.rst b/doc/sphinx/userguide/buildingdevboard.rst
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+Building for a Dev Board or FPGA
+================================
+
+Building an Example
+-------------------
+
+To compile a bare-metal RISC-V program:
+
+.. code-block:: bash
+
+   make BSP=mee [PROGRAM=hello] [TARGET=sifive-hifive1] software
+
+The square brackets in the above command indicate optional parameters for the
+Make invocation. As you can see, the default values of these parameters tell
+the build script to build the ``hello`` example for the ``sifive-hifive1`` target.
+If, for example, you wished to build the ``timer-interrupt`` example for the S51
+Arty FPGA Evaluation target, you would instead run the command
+
+.. code-block:: bash
+
+   make BSP=mee PROGRAM=timer-interrupt TARGET=coreip-s51-arty software
+
+Uploading to the Target Board
+-----------------------------
+
+.. code-block:: bash
+
+   make BSP=mee [PROGRAM=hello] [TARGET=sifive-hifive1] upload
+
+Debugging a Target Program
+--------------------------
+
+.. code-block:: bash
+
+   make BSP=mee [PROGRAM=hello] [TARGET=sifive-hifive1] debug
+
+Cleaning a Target Program Build Directory
+-----------------------------------------
+
+.. code-block:: bash
+
+   make BSP=mee [PROGRAM=hello] [TARGET=sifive-hifive1] clean
+
diff --git a/doc/sphinx/userguide/installing.rst b/doc/sphinx/userguide/installing.rst
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+Installing Freedom E SDK
+========================
+
+Supported Systems
+-----------------
+
+Freedom E SDK is supported on Linux, MacOS, and Windows.
+
+Linux support is officially provided to distributions we distribute
+builds of the RISC-V toolchain for. Currently, these distributions are
+
+- Ubuntu
+- CentOS
+
+We expect other Linux distributions to work as well, provided that the
+user can either run our provided toolchains on them or produce their own
+toolchain.
+
+Windows support is not directly provided by Freedom E SDK, but through
+our Integrated Development Environment, Freedom Studio.
+
+Prerequisites
+-------------
+
+To use this SDK, you will need the following software available on your machine:
+
+- GNU Make
+- Git
+- The RISC-V GNU Embedded Toolchain
+- RISC-V OpenOCD (for use with development board and FPGA targets)
+
+Install the RISC-V Toolchain and OpenOCD
+----------------------------------------
+
+The RISC-V GNU Toolchain and OpenOCD are available from `the SiFive Website <https://www.sifive.com/boards>`_.
+
+For OpenOCD and/or RISC-V GNU Toolchain, download the .tar.gz for your platform,
+and unpack it to your desired location. Then, set the ``RISCV_PATH`` and
+``RISCV_OPENOCD_PATH`` environment variables when using the tools:
+
+.. code-block:: bash
+
+   cp openocd-<date>-<platform>.tar.gz /my/desired/location/
+   cp riscv64-unknown-elf-gcc-<date>-<platform>.tar.gz /my/desired/location
+   cd /my/desired/location
+   tar -xvf openocd-<date>-<platform>.tar.gz
+   tar -xvf riscv64-unknown-elf-gcc-<date>-<platform>.tar.gz
+   export RISCV_OPENOCD_PATH=/my/desired/location/openocd
+   export RISCV_PATH=/my/desired/location/riscv64-unknown-elf-gcc-<date>-<version>
+
+Cloning the Repository
+----------------------
+
+This repository can be cloned by running the following commands:
+
+.. code-block:: bash
+
+   git clone --recursive https://github.com/sifive/freedom-e-sdk.git
+   cd freedom-e-sdk
+
+The ``--recursive`` option is required to clone the git submodules included in the
+repository. If at first you omit the ``--recursive`` option, you can achieve
+the same effect by updating submodules using the command:
+
+.. code-block:: bash
+
+   git submodule update --init --recursive
+
+Updating the SDK
+----------------
+
+If you'd like to update your SDK to the latest version:
+
+.. code-block:: bash
+
+   git pull origin master
+   git submodule update --init --recursive
diff --git a/doc/sphinx/userguide/standalone.rst b/doc/sphinx/userguide/standalone.rst
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+Creating a Standalone Project
+=============================
+
+You can export a program to a standalone project directory using the ``standalone``
+target. The resulting project will be locked to a specific ``TARGET``. Note
+that this functionality is only supported for Freedom Metal programs, not the
+Legacy Freedom E SDK.
+
+``STANDALONE_DEST`` is a required argument to provide the desired project location.
+
+.. code-block:: bash
+
+   make BSP=mee [PROGRAM=hello] [TARGET=sifive-hifive1] STANDALONE_DEST=/path/to/desired/location standalone
+