This projct use these libraries.

newlib-3.0.0.20180831
lwip-2.1.2
bearssl-0.6
mruby

Source code

start.S -- start up assembra
main.c -- main
syscalls.c -- dummy and sbrk function for newlib

intr.c -- inturrupt code
inthandler.S -- excemtion assembra
traps.c -- cache control code

uart.c -- rtl8196 uart code rtl_timer.c -- rtl8196 timer code
rtl_ether.c -- rt8196 ethernet nic support code
rtl_switch.c -- rtl8196 switch vlan setup code
swCore.c -- realtek switch control code
net.c -- netwrok code
bear.c -- https code

Build tools is this.

rsdk-1.5.5-5281-EB-2.6.30-0.9.30.3-110714

I build on FreeBSD/amd64 used by linux emuration.

Default build is RTL8196C. If you want build for RTL8196E do this.

% make TARGET=RTL8196E

$ git clone --recursive https://github.com/yamori813/rtlbm-mruby.git
$ git clone https://github.com/yamori813/rtl819x-toolchain.git
$ cd rtlbm-mruby/build/
$ ./getfiles.sh
$ ./mknewlib.sh
$ ./mklwip.sh
$ ./mkbearssl.sh
$ ./mkmruby.sh
$ cd ..
$ ./mkallvm.sh

main.rtl --- RTL8196C
main_e.rtl --- RTL8196E
main_8198.rtl --- RTL8198
main_sw.rtl --- RTL8197 with SWITCH