(07-06-2024, 06:50 PM)lupyuen Wrote: Earlier this year we made a RISC-V Emulator for Ox64 BL808 SBC. Every day we run it for testing the Daily Build of Apache NuttX RTOS for Ox64, thanks to our customised TinyEMU RISC-V Emulator. (Not the small flightless bird)

Now that NuttX supports Sophgo SG2000 SoC: Let’s create a similar emulator for Pine64 Oz64 SBC…

(1) We take TinyEMU Emulator for Ox64 BL808 SBC
(2) Update the RISC-V Memory Map to match Sophgo SG2000 SoC
(3) Fix the `auipc` Overflow in TinyEMU Boot Code
(4) We emulate the 16550 UART Controller
(5) By intercepting Reads and Writes to the UART I/O Registers
(6) But TinyEMU supports only 32 Interrupts, we bump up to 64
(7) Eventually we’ll emulate SG2000 Peripherals like GPIO
(8) Right now it’s good enough for Daily Automated Testing of NuttX for SG2000

Check out the article: RISC-V Emulator for Sophgo SG2000 SoC (Pine64 Oz64)

Lup