janhieber

/dts-v1/;
/ {
    description = "Simple image with single Linux kernel";
    images {
        #address-cells = <1>;
        #size-cells = <0>;

        kernel@0 {
            #address-cells = <1>;
            #size-cells = <0>;

janhieber

#!/usr/bin/env sh

# settings
USECCACHE=1
CROSS_COMPILE=arm-none-eabi-
ARCH=arm
MAKEPARAM="all"

#############################################

janhieber

#!/usr/bin/env sh

# settings
DEVICE=sdj
IP=192.168.0.2

##########################################################

function main(){
    # if we have an IP, check if target is there

janhieber

############# on host

# set fixed IP (rpi-net)
NetworkManager / systemd-networkd ...

# enable IPv4 forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
echo "net.ipv4.ip_forward=1" > /etc/sysctl.d/ipforward.conf

# enable NAT in iptables (rpi-net is target interface)

janhieber

# assume, gzipped static html with embedded CSS and JS named html.gz
# note: browser can unzip it when header is correct! save space!

# make binary object from data
arm-none-eabi-ld -r -b binary -o html.o html.gz
# put in read only section
arm-none-eabi-objcopy.exe --rename-section .data=.rodata,alloc,load,readonly,data,contents html.o html.o
# print symbols, just FYI
arm-none-eabi-objdump.exe -t html.o

janhieber

mkdir /usr/local/bin/ccache
ln -s /usr/bin/ccache /usr/local/bin/ccache/arm-none-eabi-gcc
ln -s /usr/bin/ccache /usr/local/bin/ccache/arm-none-eabi-g++
ln -s /usr/bin/ccache /usr/local/bin/ccache/arm-none-eabi-cpp
ln -s /usr/bin/ccache /usr/local/bin/ccache/arm-none-eabi-c++

export PATH="/usr/local/bin/ccache:$PATH"

# now cross compile as usuas, eg wih
# CROSS_COMPILE=arm-none-eabi-

janhieber

# Enter this in u-boot.
# Downloads SPL and u-boot into RAM and then writes it to sdcard

# network configuration
setenv ipaddr 192.168.0.2
setenv serverip 192.168.0.1

# update commands
setenv tftp_to_fat "tftp ${loadaddr} '${file}'; fatwrite mmc 0:1 ${loadaddr} '${file}' '${filesize}'"
setenv u "for file in MLO u-boot.img; do run tftp_to_fat; done; reset"