====== AVR32 ======

:!: **//This effort is out of date and won't work with the latest version of %%FreeBSD%%//**

:!: **//AVR discontinued the AVR32 architecture development//**

AVR32 is a 32 bit RISC architecture from Atmel designed for high throughput with low power consumption. This port targets the bigger AP7 chips.

===== Boards =====
Atmel NGW100 http://www.atmel.com/tools/NGW100MKIINETWORKGATEWAYKIT.aspx

===== Status =====
NGW100 boots to single user mode

==== What works ====
  * Booting kernel with tftp
  * Mounting rootfs from onboard flash (cfi) or using nfs
  * Can execute statically linked commands in single user mode

==== What does not work ====
  * Dynamic linking (binutils bug?)
  * Lots of other stuff

===== Source and Binaries =====
  * [[https://web.archive.org/web/20081010065642/http://www.atmel.no/buildroot/buildroot-u-boot.html]] (archive.org)

===== Build =====

<code>
#!/bin/sh

export SRCROOT=/src/FreeBSD/p4/avr32/src
export TARGET_ARCH=avr32
export TARGET=avr32
export TARGET_CPUTYPE=avr32
export KERNCONF=NGW100
export MAKEOBJDIRPREFIX=/src/FreeBSD/obj/avr32
export TFTPBOOT=/src/FreeBSD/tftpboot

make WITHOUT_GDB=yes kernel-toolchain

make NO_MODULES=yes buildkernel
KERNOBJDIR=$MAKEOBJDIRPREFIX/$TARGET_ARCH.$TARGET_ARCH/$SRCROOT/sys/$KERNCONF
OBJCOPY=$MAKEOBJDIRPREFIX/$TARGET_ARCH.$TARGET_ARCH/$SRCROOT/tmp/usr/bin/objcopy
$OBJCOPY -O binary $KERNOBJDIR/kernel $KERNOBJDIR/kernel.binary
mkimage -A avr32 -O freebsd -a 0x90000000 -e 0x90000000 -n 'FreeBSD' \
    -T kernel -C none -d $KERNOBJDIR/kernel.binary $TFTPBOOT/kernel.uboot
</code>

mkimage is a part of uboot package (devel/u-boot port)

===== Boot =====
U-boot 1.3 or later is required to boot. Update instructions and binaries can be found at [[https://web.archive.org/web/20081010065642/http://www.atmel.no/buildroot/buildroot-u-boot.html]] (archive.org)

Only tested why of booting is using tftp, dhcpd and nfs.
* Setup isc-dhcpd and add the following entry:

<code>
host ngw {
        hardware ethernet <board mac address>;
        option root-path "<nfs server>:<avr32 root>";
        next-server <tfpd server>;
        filename "kernel.uboot";
}
</code>

  * Board mac address can be found by typing 'printenv ethaddr' in u-boot
  * Enable nfsd and add line for %%<%%avr32 root> to /etc/exports
  * Enable tftpd in inetd.conf, modify -s parameter to point to directory with AVR32 kernels

To boot, type: 'dhcp; bootm' in u-boot.

----

{{tag>Historical}}