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.

$ 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 applications using below commands.

$ 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:

$ qemu-system-riscv64 -M shakti_c -nographic \
   -bios path/to/shakti_sdk_qemu/loopback.shakti

OpenSBI¶

We can also run OpenSBI with Test Payload.

$ 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.

$ qemu-system-riscv64 -M shakti_c -nographic \
   -bios path/to/fw_payload.elf

Shakti C Reference Platform (shakti_c)¶