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