141 lines
4.6 KiB
ReStructuredText
141 lines
4.6 KiB
ReStructuredText
.. _nsim:
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DesignWare(R) ARC(R) Emulation (nsim)
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#####################################
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Overview
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********
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This board configuration can be used to run ARC EM / ARC HS based images in
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simulation with `Designware ARC nSIM`_ or run same images on FPGA based HW
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platform `HAPS`_. The board includes the following features:
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* ARC EM or ARC HS processor
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* ARC internal timer
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* a virtual console (ns16550 based UART model)
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There are four supported board sub-configurations:
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* ``nsim_em`` which includes normal ARC EM features and ARC MPUv2
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* ``nsim_em_em7d_v22`` which includes normal ARC EM features and ARC MPUv2, specially with one register bank and fast irq
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* ``nsim_sem`` which includes secure ARC EM features and ARC MPUv3
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* ``nsim_hs`` which includes base ARC HS features, i.e. w/o PMU and MMU
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* ``nsim_hs_smp`` which includes base ARC HS features in multi-core cluster, still w/o PMU and MMU
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For detailed arc features, please refer to
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:zephyr_file:`boards/arc/nsim/support/nsim_em.props`,
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:zephyr_file:`boards/arc/nsim/support/nsim_em7d_v22.props`,
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:zephyr_file:`boards/arc/nsim/support/nsim_sem.props`,
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:zephyr_file:`boards/arc/nsim/support/nsim_hs.props` and
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:zephyr_file:`boards/arc/nsim/support/mdb_hs_smp.args`
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Hardware
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********
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Supported Features
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==================
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The following hardware features are supported:
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+-----------+------------+-----+-------+-----+-----------------------+
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| Interface | Controller | EM | SEM | HS | Driver/Component |
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+===========+============+=====+=======+=====+=======================+
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| INT | on-chip | Y | Y | Y | interrupt_controller |
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+-----------+------------+-----+-------+-----+-----------------------+
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| UART | ns16550 | Y | Y | Y | serial port |
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+-----------+------------+-----+-------+-----+-----------------------+
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| TIMER | on-chip | Y | Y | Y | system clock |
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+-----------+------------+-----+-------+-----+-----------------------+
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Programming and Debugging
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*************************
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Required Hardware and Software
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==============================
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To run single-core Zephyr RTOS applications in simulation on this board,
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`Designware ARC nSIM`_ or `Designware ARC nSIM Lite`_ is required.
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To run multi-core Zephyr RTOS applications in simulation on this board,
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`Designware ARC nSIM`_ and MetaWare Debugger from `ARC MWDT`_ are required.
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To run Zephyr RTOS applications on FPGA-based `HAPS`_ platform,
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MetaWare Debugger from `ARC MWDT`_ is required.
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Building Sample Applications
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==============================
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Use this configuration to run basic Zephyr applications and kernel tests in
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nSIM, for example, with the :ref:`synchronization_sample`:
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.. zephyr-app-commands::
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:zephyr-app: samples/synchronization
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:host-os: unix
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:board: nsim_em
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:goals: flash
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This will build an image with the synchronization sample app, boot it using
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nsim, and display the following console output:
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.. code-block:: console
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***** BOOTING ZEPHYR OS v1.12 - BUILD: July 6 2018 15:17:26 *****
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threadA: Hello World from arc!
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threadB: Hello World from arc!
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threadA: Hello World from arc!
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threadB: Hello World from arc!
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.. note::
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To exit the simulator, use Ctrl+], then Ctrl+c
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Use this configuration to run same application on `HAPS`_ platform:
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.. zephyr-app-commands::
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:zephyr-app: samples/synchronization
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:host-os: unix
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:board: nsim_em
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:goals: flash --runner mdb-hw
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Debugging
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=========
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.. note::
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The normal ``make debug`` command won't work for debugging
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applications using nsim because both the nsim simulator and the
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gdb debugger use the console for output. You need to use separate
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terminal windows for each tool to avoid intermixing their output.
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After building your application, cd to the build folder and open two
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terminal windows. In terminal one, use nsim to start a GDB server
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and wait for a remote connection:
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.. code-block:: console
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# for ninja build system:
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ninja debugserver
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# for make build system:
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make debugserver
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In terminal two, connect to the GDB server using :file:`arc-elf32-gdb`.
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This command loads the symbol table from the elf binary file, for example
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the :file:`./zephyr/zephyr.elf` file:
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.. code-block:: console
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..../path/to/arc-elf32-gdb zephyr/zephyr.elf
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(gdb) target remote : 3333
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(gdb) load
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Now the debug environment has been set up, you can debug the application with gdb commands.
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References
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**********
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.. _Designware ARC nSIM: https://www.synopsys.com/dw/ipdir.php?ds=sim_nsim
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.. _Designware ARC nSIM Lite: https://www.synopsys.com/cgi-bin/dwarcnsim/req1.cgi
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.. _HAPS: https://www.synopsys.com/verification/prototyping/haps.html
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.. _ARC MWDT: https://www.synopsys.com/dw/ipdir.php?ds=sw_metaware
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