buildroot qemu ARM

build embedded system for qemu and ARM with buildroot (buildroot-2016.05)

use qemu_arm_versatile_defconfig config file as base config

$make qemu_arm_versatile_defconfig

changed nothing

$make

run

$qemu-system-arm 

-M versatilepb 

-kernel output/images/zImage 

-dtb output/images/versatile-pb.dtb 

-drive file=output/images/rootfs.ext2,if=scsi,format=raw 

-append "root=/dev/sda console=ttyAMA0,115200" 

-nographic 

-net nic,model=rtl8139 -net user

can be replace with:

-hda=output/images/rootfs.ext2

-M Set the emulated machine type

-kernel 

-dtb device tree image

-drive block device option

-append kernel command line /-drive/

-nographic disable graphical output and redirect serial I/Os to console

execution command taken from:

buildroot-2016.05/board/qemu/arm-versatile/readme.txt

Buildroot "output" directory for multiple targets

 mkdir device

cd device

  make -C "/path/to/buildroot" O="`pwd`" menuconfig

  make