Hi all, I'm going to build and run Linux (git://openrisc.net/jonas/linux)on Altera DE1 board. What should I do and how to configure to create a vmlinux image that can run DE1?

Hi,

First you need to install the or1k toolchain: http://opencores.org/or1k/OpenRISC_GNU_tool_chain#Prebuilt_versions

And of course you need to have Quartus installed...

The Altera DE1 board is supported in orpsoc-cores (https://github.com/openrisc/orpsoc-cores/tree/master/systems/de1).

You need to install fusesoc (https://github.com/olofk/fusesoc a.k.a ORPSoCv3). Then, create a build directory somewhere on your system and copy fusesoc.conf here. Edit this file tell fusesoc where is orpsoc-cores.Then "fusesoc build de1". You'll get a FPGA configuration file for the system. Configure your fpga with "fusesoc pgm de1".

Then you need to compile Linux. Get sources here: git://openrisc.net/jonas/linux. Then go to arch/openrisc/boot/dts and create a de1.dts file with minimal nodes. Then "make menuconfig" and select your de1.dts file. Exit and "make". You'll get a vmlinux image.

Download and build openocd (./configure with --enable-usb-blaster-ftdi) and install it. Then run:

openocd -f /interface/altera-usb-blaster.cfg -f board/or1k_generic.cfg -c "load_image /your/path/here/vmlinux" -c "reg npc 0x100" -c "resume" -c "exit"

If I haven't forget anything Linux should start :)

Good luck.

Franck.

PS: of course your question was to vague. However, I wrote this as it serves as an introduction to fusesoc.