Centos on a odroid_hc1

Prerequisite

A running arm device to do this, 
distro / kernel should not mater 

Prepare Sources

Download Centos-Uboot-Community-kernel-img.raw.xz
https://drive.google.com/open?id=1PvLxWVwvK9H2zJTnBF2rKlA7IDmbpa7s

To download it from the command line:

nano curl_Centos-Uboot-Community-kernel-img.sh
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#!/bin/bash
# thanks to Brett McLain
# http://blog.mclain.ca/download-large-files-from-google-drive-via-curl/

filename="Centos-Uboot-Community-kernel-img.raw.xz"
file_id="1PvLxWVwvK9H2zJTnBF2rKlA7IDmbpa7s"

query=`curl -c ./cookie.txt -s -L "https://drive.google.com/uc?export=download&id=${file_id}" \
| perl -nE'say/uc-download-link.*? href="(.*?)\">/' \
| sed -e 's/amp;//g' | sed -n 2p`
url="https://drive.google.com$query"
curl -b ./cookie.txt -L -o ${filename} $url

rm -f cookie.txt

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chmod +x curl_Centos-Uboot-Community-kernel-img.sh
./curl_Centos-Uboot-Community-kernel-img.sh


(w)get early boot bin's from (and signed by) Hardkernel:

wget https://raw.githubusercontent.com/hardkernel/u-boot/odroidxu4-v2017.05/sd_fuse/sd_fusing.sh \
https://raw.githubusercontent.com/hardkernel/u-boot/odroidxu4-v2017.05/sd_fuse/bl1.bin.hardkernel \
https://raw.githubusercontent.com/hardkernel/u-boot/odroidxu4-v2017.05/sd_fuse/bl2.bin.hardkernel.720k_uboot \
https://raw.githubusercontent.com/hardkernel/u-boot/odroidxu4-v2017.05/sd_fuse/tzsw.bin.hardkernel

chmod a+x sd_fusing.sh

As always: **Be sure you got the right device (/dev/.....) pointing to your sd-card** :

export sdcard="/dev/sdX"
xzcat Centos-Uboot-Community-kernel-img.raw.xz | sudo dd of=${sdcard} status=progress bs=4M && sudo sync

Mount the sd-card:

sudo mount ${sdcard}2 /mnt
sudo mount ${sdcard}1 /mnt/boot

Get u-boot and flash all boot blobs to the sd-card

cp /mnt/usr/share/uboot/odroid-xu3/u-boot.bin .
sudo ./sd_fusing.sh ${sdcard}


Add to the kernel commandline in extlinux.conf
cpuidle.off=1 console=tty1 console=ttySAC2,115200n8 rd.driver.pre=ledtrig-heartbeat,xhci-plat-hcd no_bL_switcher

sudo nano /mnt/boot/extlinux/extlinux.conf
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# extlinux.conf generated by appliance-creator
ui menu.c32
menu autoboot Welcome to Centos-Uboot-Community-kernel. Automatic boot in # second{,s}. Press a key for options.
menu title Centos-Uboot-Community-kernel Boot Options.
menu hidden
timeout 20
totaltimeout 600

label Centos-Uboot-Community-kernel (4.18.16-200.el7.armv7hl)
        kernel /vmlinuz-4.18.16-200.el7.armv7hl
        append cpuidle.off=1 console=tty1 console=ttySAC2,115200n8 rd.driver.pre=ledtrig-heartbeat,xhci-plat-hcd no_bL_switcher ro root=UUID=<your_uiid>
        initrd /initramfs-4.18.16-200.el7.armv7hl.img

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add / remove modules / drivers to creation of initramfs by dracut

sudo nano /mnt/etc/dracut.conf.d/odroid_hc1.conf
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add_dracutmodules+=" dm "
omit_dracutmodules+=" network ifcfg plymouth "
add_drivers+=" exynosdrm exynos_bus exynos_trng exynos_nocp exynos_rng phy_exynos_dp_video "
add_drivers+=" phy_exynos_mipi_video dwc3_exynos clk_exynos_audss i2c_exynos5 dw_mmc_exynos "
add_drivers+=" dw_mmc_pltfm dw_mmc phy_exynos_usb2 phy_exynos5_usbdrd pwm_samsung "
add_drivers+=" dwc3 ledtrig-heartbeat "

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Create new initramfs with specific drivers:

sudo chroot /mnt
dracut -v -f /boot/initramfs-4.18.16-200.el7.armv7hl.img 4.18.16-200.el7.armv7hl
exit
sudo umount -R /mnt

This sould boot, check if your usb network and uas (sata) are connectect as usb3 device:

yum install  usbutils

lsusb -t
/:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
    |__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
    |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=uas, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=exynos-ohci/3p, 12M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=exynos-ehci/3p, 480M

Note the 5000M @ Driver=r8152 (=network) and Driver=uas (=sata)

Check if all 8 cores are up:

lscpu
Architecture:          armv7l
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    1
Core(s) per socket:    4
Socket(s):             2
Model:                 3
Model name:            ARMv7 Processor rev 3 (v7l)
CPU max MHz:           1300.0000
CPU min MHz:           200.0000
BogoMIPS:              66.00
Flags:                 half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae