0924a423ba
Add documentation for Shakti C reference platform. Signed-off-by: Vijai Kumar K <vijai@behindbytes.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20210412174248.8668-1-vijai@behindbytes.com Signed-off-by: Bin Meng <bmeng.cn@gmail.com> [ Changes from Bin Meng: - Add missing TOC Message-id: 20210430070534.1487242-1-bmeng.cn@gmail.com ] Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
83 lines
2.2 KiB
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83 lines
2.2 KiB
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Shakti C Reference Platform (``shakti_c``)
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==========================================
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Shakti C Reference Platform is a reference platform based on arty a7 100t
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for the Shakti SoC.
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Shakti SoC is a SoC based on the Shakti C-class processor core. Shakti C
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is a 64bit RV64GCSUN processor core.
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For more details on Shakti SoC, please see:
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https://gitlab.com/shaktiproject/cores/shakti-soc/-/blob/master/fpga/boards/artya7-100t/c-class/README.rst
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For more info on the Shakti C-class core, please see:
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https://c-class.readthedocs.io/en/latest/
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Supported devices
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-----------------
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The ``shakti_c`` machine supports the following devices:
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* 1 C-class core
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* Core Level Interruptor (CLINT)
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* Platform-Level Interrupt Controller (PLIC)
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* 1 UART
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Boot options
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------------
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The ``shakti_c`` machine can start using the standard -bios
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functionality for loading the baremetal application or opensbi.
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Boot the machine
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----------------
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Shakti SDK
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~~~~~~~~~~
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Shakti SDK can be used to generate the baremetal example UART applications.
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.. code-block:: bash
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$ git clone https://gitlab.com/behindbytes/shakti-sdk.git
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$ cd shakti-sdk
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$ make software PROGRAM=loopback TARGET=artix7_100t
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Binary would be generated in:
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software/examples/uart_applns/loopback/output/loopback.shakti
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You could also download the precompiled example applicatons using below
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commands.
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.. code-block:: bash
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$ wget -c https://gitlab.com/behindbytes/shakti-binaries/-/raw/master/sdk/shakti_sdk_qemu.zip
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$ unzip shakti_sdk_qemu.zip
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Then we can run the UART example using:
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.. code-block:: bash
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$ qemu-system-riscv64 -M shakti_c -nographic \
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-bios path/to/shakti_sdk_qemu/loopback.shakti
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OpenSBI
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~~~~~~~
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We can also run OpenSBI with Test Payload.
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.. code-block:: bash
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$ git clone https://github.com/riscv/opensbi.git -b v0.9
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$ cd opensbi
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$ wget -c https://gitlab.com/behindbytes/shakti-binaries/-/raw/master/dts/shakti.dtb
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$ export CROSS_COMPILE=riscv64-unknown-elf-
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$ export FW_FDT_PATH=./shakti.dtb
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$ make PLATFORM=generic
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fw_payload.elf would be generated in build/platform/generic/firmware/fw_payload.elf.
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Boot it using the below qemu command.
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.. code-block:: bash
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$ qemu-system-riscv64 -M shakti_c -nographic \
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-bios path/to/fw_payload.elf
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