User:Mrueg/Radxa Rock

Note
This is still work-in-progress. I'll continue the documentation, when I get time to work on it.

Running Gentoo on Radxa

Radxa Rock is a small development board using a quad core Rockchip RK3188 (ARMv7) processor and 2 GByte DDR3 memory. The operating system can be installed either on internal NAND (/dev/mtdblock), an external USB device or microSD card (/dev/mmcblk).

As you can see in the speed comparison below, the best choice is to use a USB flash drive.

Speed comparison (based on ):

• USB flash drive: Corsair Voyager 3.0 32GB
• MicroSD: FlashRaptor 32GB Class10

	NAND	MicroSD	USB
Read	13.8 MB/s	12.4 MB/s	27.4 MB/s
Write	12.1 MB/s	13.4 MB/s	30.7 MB/s

Installing Gentoo

Preliminaries

Before proceeding with the installation make sure you meet these preconditions:

• Install sys-apps/rkflashkit on another host
• Connect the Radxa (microUSB) via USB to that host
• Download a current stage3 userland for ARMv7 with hardfp

Recommendations

FILE /proc/cpuinfo

Features        : swp half thumb fastmult vfp edsp neon vfpv3

Set according CFLAGS:

FILE /etc/portage/make.conf

CHOST="armv7a-hardfloat-linux-gnueabi"
CFLAGS="-march=armv7-a -mtune=cortex-a9 -mfpu=neon -mfloat-abi=hard -fomit-frame-pointer -O2 -pipe"
CXXFLAGS="${CFLAGS}"

Installation process

TODO

Updating kernel

Create boot partition as a file:

root #mkbootimg-rockchip --kernel linux/arch/arm/boot/zImage --ramdisk initrd-5e2481b72e48d473e8de913f92fe86b77437141e.img -o boot.img.new

Copy this file to the boot partition:

root #dd if=boot.img.new of=/dev/block/mtd/by-name/boot bs=16384 conv=sync,fsync