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How to install Fedora on TrimSlice PRO

he TrimSlice PRO developer kid comes delivered with a 32GB SSD containing anoter Linux distribution, but can boot from pretty much any media (SD. USB, MicroSD, SSD) and you are free to experiment without voiding warranty.

U-Boot is factory preprogrammed in internal flash. There is no need to reflash U-Boot as the default U-Boot version is very open and friendly configured. But you may do so if you wish, following instructions from TrimSlice. One very nice thing is that the device allows easy recovery using the SD slot if the boot flash gets corrupted, eleminating the need for JTAG in such cases.

U-Boot behavior

and automatically tries to boot from the first partition of any of the above boot sources and expects a boot.scr u-boot script file to be found in / or /boot on the boot device. 

When starting boot.scr the following variables are set for convenience

 fs         filesystem type (ext2 or fat)
 interface  u-boot interface type (mmc or usb)
 bus        bus number of the interface
 prefix     boot prefix (/ or /boot)

enabling a generic boot.scr script to be used to boot from any of the possible boot devices. (see below)

Fedora boot script

Save this as boot.cmd in /boot and convert it to a uboot image by using

mkimage -A arm -O linux -T script -C none -d boot.cmd boot.scr

echo starting Fedora boot.scr

if test -z "${rootpart}" && test -z "${rootuuid}"; then rootpart=4 #rootuuid=3e6be9de-8139-11d1-9106-a43f08d823a6 fi

  1. if test -z "${kernel}" && test -z "${kernelver}"; then
  2. kernelver=
  3. fi

if test -z "${kernel}"; then kernel=uImage initrd=uInitrd if test -n "${kernelver}"; then kernel=${kernel}-${kernelver} initrd=${kernel}-${kernelver} fi fi

if test -z "${console}"; then console="console=ttyS0,115200n8" fi

setenv initrdaddr 1600000

if test -n "${rootuuid}"; then echo booting with UUID selected root rootfs="ro root=UUID=${rootuuid}" elif test "${interface}" = "mmc" && test "${bus}" = "1"; then echo booting from internal microSD echo booting from internal microSD rootfs="ro root=/dev/mmcblk0p${rootpart}" elif test "${interface}" = "mmc" && test "${bus}" = "0"; then echo booting from external SD if mmc init 1; then rootfs="ro root=/dev/mmcblk1p${rootpart}" else rootfs="ro root=/dev/mmcblk0p${rootpart}" fi mmc init 0

elif test "${interface}" = "usb" && test "${bus}" = "1"; then echo booting from internal SSD rootfs="ro root=/dev/sda${rootpart} nohdparm rootwait" else echo booting from external USB rootfs="ro root=/dev/sdb${rootpart} rootwait" fi

setenv bootargs ${console} ${rootfs}

echo bootargs ${bootargs} echo kernel ${fs}load ${interface} ${device} ${loadaddr} ${prefix}uImage${kernelver} echo initrd ${fs}load ${interface} ${device} ${loadaddr} ${prefix}uImage${kernelver}

${fs}load ${interface} ${device} ${loadaddr} ${prefix}uImage${kernelver} ${fs}load ${interface} ${device} ${initrdaddr} ${prefix}uInitrd${kernelver}

bootm ${loadaddr} ${initrdaddr} </code>