boards/risc-v: Add support for PINE64 Star64 JH7110 SBC

[lupyuen]

Summary

This PR adds support for PINE64 Star64 64-bit RISC-V SBC, based on StarFive JH7110 SoC. Most of the code is derived from NuttX for QEMU RISC-V (Kernel Mode). The source files are explained in the articles here

Modified Files

boards/Kconfig: Added Star64 board

New Files in boards/risc-v/jh7110/star64

src/jh7110_appinit.c: Startup Code

include/board.h: Star64 Definitions

include/board_memorymap.h: Memory Map

src/etc/init.d/rc.sysinit, rcS: Startup Script

src/.gitignore: Ignore the tmp filesystem

scripts/ld.script: Linker Script

scripts/Make.defs: Star64 Makefile

src/Makefile: Star64 Makefile

Kconfig: Star64 Config

configs/nsh/defconfig: NSH Build Config

Updated Documentation

introduction/detailed_support.rst: Added StarFive JH7110 SoC and Star64 SBC

platforms/risc-v/jh7110/index.rst: New page for StarFive JH7110 SoC

platforms/risc-v/jh7110/boards/star64/index.rst: Building and booting NuttX for Star64

Impact

This PR is needed to support NuttX on Star64 SBC.

No impact on existing code, since the Star64 source files are not used by existing code.

Testing

We tested the source files on Star64 SBC. NuttX boots correctly to NSH Shell:

• NuttX Log on Star64

Starting kernel ...
clk u5_dw_i2c_clk_core already disabled
clk u5_dw_i2c_clk_apb already disabled
BC
NuttShell (NSH) NuttX-12.2.1-RC0
nsh> uname -a
NuttX 12.2.1-RC0 57d5bba-dirty Aug  5 2023 12:30:55 risc-v star64
nsh> free
                   total       used       free    largest  nused  nfree
        Kmem:    2065400      14600    2050800    2049440     50      3
        Page:   20971520     643072   20328448   20328448
nsh> ls -l
/:
 dr--r--r--       0 dev/
 dr--r--r--       0 proc/
 dr--r--r--       0 system/
nsh> hello
Hello, World!!

Watch the Demo Video

See the Build Outputs

See the Build Log