{{tag>[hardware apu pxe]}}

=====PC Engines APU - update BIOS over PXE=====

====Prerequisites====
  * Working PXE/tftp server.
  * PC Engine's APU.
  * Serial console.

====Configuration====
  * On the PXE server, create a directory. <code>mkdir -p /tftpboot/bios</code>
  * Download the (latest) BIOS firmware: [[http://www.pcengines.ch/file/apu_tinycore.tar.bz2]]
  * Extract in /tftpboot/bios.
  * Copy **syslinux.cfg** to /tftpboot/pxelinux.cfg/default, and edit the file.<code>SERIAL 0 115200
CONSOLE 0

default tinyCore

ALLOWOPTIONS 0
TIMEOUT 600

LABEL tinyCore
        MENU LABEL ^tinyCore
        KERNEL /bios/vmlinuz  console=ttyS0,115200n8
        append priority=low initrd=/bios/core.gz superuser noswap nodhcp embed nozswap blacklist=
</code>


====Download BIOS image, flash BIOS====
  * Request IP-Address. <code>udhcpc -i eth0</code>
  * Download the BIOS firmware. <code>tftp -g -r /bios/apu140405.rom pxe.server.host</code>
  * Upgrade the firmware. <code>$ flashrom -w apu140405.rom
flashrom v0.9.7-r1711-APU on Linux 3.8.13-tinycore (i686)
flashrom is free software, get the source code at http://www.flashrom.org

Using default programmer "internal".
Calibrating delay loop... OK.
coreboot table found at 0xdffdf000.
Found chipset "AMD SB7x0/SB8x0/SB9x0". Enabling flash write... OK.
Found Macronix flash chip "MX25L1605A/MX25L1606E" (2048 kB, SPI) at physical address 0xffe00000.
Reading old flash chip contents... done.
Erasing and writing flash chip... Erase/write done.</code>
  * Reboot the APU. <code>reboot</code>