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Apache NuttX RTOS for Sophgo SG2000 RISC-V SoC (Milk-V Duo S SBC)
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@lupyuen lupyuen released this 14 May 06:35
sg2000-1
122c717

See https://github.com/lupyuen/nuttx-sg2000

Build Script:

## For xPack Toolchain:
## Change all `riscv64-unknown-elf` to `riscv-none-elf`

set -e  #  Exit when any command fails
set -x  #  Echo commands

## Build NuttX
function build_nuttx {

  ## Go to NuttX Folder
  pushd ../nuttx

  ## Build NuttX
  make -j 8

  ## Return to previous folder
  popd
}

## Build Apps Filesystem
function build_apps {

  ## Go to NuttX Folder
  pushd ../nuttx

  ## Build Apps Filesystem
  make -j 8 export
  pushd ../apps
  ./tools/mkimport.sh -z -x ../nuttx/nuttx-export-*.tar.gz
  make -j 8 import
  popd

  ## Return to previous folder
  popd
}

## Download WIP NuttX for SG2000 (based on Ox64 BL808)
git clone --branch sg2000 \
  https://github.com/lupyuen2/wip-nuttx \
  nuttx
git clone --branch sg2000 \
  https://github.com/lupyuen2/wip-nuttx-apps \
  apps
cd nuttx

## Pull updates
git pull && git status && hash1=`git rev-parse HEAD`
pushd ../apps
git pull && git status && hash2=`git rev-parse HEAD`
popd
echo NuttX Source: https://github.com/apache/nuttx/tree/$hash1 >nuttx.hash
echo NuttX Apps: https://github.com/apache/nuttx-apps/tree/$hash2 >>nuttx.hash

## Show the version of GCC
riscv64-unknown-elf-gcc -v

## Configure build
tools/configure.sh ox64:nsh

## Build NuttX
build_nuttx

## Build Apps Filesystem
build_apps

## Generate Initial RAM Disk
genromfs -f initrd -d ../apps/bin -V "NuttXBootVol"

## Show the size
riscv64-unknown-elf-size nuttx

## Export the Binary Image to `nuttx.bin`
riscv64-unknown-elf-objcopy \
  -O binary \
  nuttx \
  nuttx.bin

## Prepare a Padding with 64 KB of zeroes
head -c 65536 /dev/zero >/tmp/nuttx.pad

## Append Padding and Initial RAM Disk to NuttX Kernel
cat nuttx.bin /tmp/nuttx.pad initrd \
  >Image

## Copy the config
cp .config nuttx.config

## Dump the disassembly to nuttx.S
riscv64-unknown-elf-objdump \
  --syms --source --reloc --demangle --line-numbers --wide \
  --debugging \
  nuttx \
  >nuttx.S \
  2>&1

## Dump the init disassembly to init.S
riscv64-unknown-elf-objdump \
  --syms --source --reloc --demangle --line-numbers --wide \
  --debugging \
  ../apps/bin/init \
  >init.S \
  2>&1

## Dump the hello disassembly to hello.S
riscv64-unknown-elf-objdump \
  --syms --source --reloc --demangle --line-numbers --wide \
  --debugging \
  ../apps/bin/hello \
  >hello.S \
  2>&1

## Copy NuttX Image and Device Tree to TFTP Server
cp Image Image-sg2000
scp Image-sg2000 tftpserver:/tftpboot/Image-sg2000
scp cv181x_milkv_duos_sd.dtb tftpserver:/tftpboot/cv181x_milkv_duos_sd.dtb
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