original development tree for Linux kernel GTP module; now long in mainline.
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Linus Torvalds 98d38dd2ee OpenRISC updates for 3.13 9 years ago
boot/dts openrisc: use new common dtc rule 10 years ago
configs openrisc: Refresh or1ksim_defconfig for v3.12 9 years ago
include OpenRISC updates for 3.13 9 years ago
kernel OpenRISC updates for 3.13 9 years ago
lib ARCH: drivers remove __dev* attributes. 10 years ago
mm arch: mm: pass userspace fault flag to generic fault handler 10 years ago
Kconfig Remove GENERIC_HARDIRQ config option 10 years ago
Makefile openrisc: Makefile: append "-D__linux__" to KBUILD_CFLAGS 9 years ago
README.openrisc OpenRISC: Miscellaneous 12 years ago
TODO.openrisc OpenRISC: Miscellaneous 12 years ago


OpenRISC Linux

This is a port of Linux to the OpenRISC class of microprocessors; the initial
target architecture, specifically, is the 32-bit OpenRISC 1000 family (or1k).

For information about OpenRISC processors and ongoing development:

website http://openrisc.net

For more information about Linux on OpenRISC, please contact South Pole AB.

email: info@southpole.se

website: http://southpole.se


Build instructions for OpenRISC toolchain and Linux

In order to build and run Linux for OpenRISC, you'll need at least a basic
toolchain and, perhaps, the architectural simulator. Steps to get these bits
in place are outlined here.

1) The toolchain can be obtained from openrisc.net. Instructions for building
a toolchain can be found at:


2) or1ksim (optional)

or1ksim is the architectural simulator which will allow you to actually run
your OpenRISC Linux kernel if you don't have an OpenRISC processor at hand.

git clone git://openrisc.net/jonas/or1ksim-svn

cd or1ksim
./configure --prefix=$OPENRISC_PREFIX
make install

3) Linux kernel

Build the kernel as usual

make ARCH=openrisc defconfig
make ARCH=openrisc

4) Run in architectural simulator

Grab the or1ksim platform configuration file (from the or1ksim source) and
together with your freshly built vmlinux, run your kernel with the following

sim -f arch/openrisc/or1ksim.cfg vmlinux



In the code, the following particles are used on symbols to limit the scope
to more or less specific processor implementations:

openrisc: the OpenRISC class of processors
or1k: the OpenRISC 1000 family of processors
or1200: the OpenRISC 1200 processor



18. 11. 2003 Matjaz Breskvar (phoenix@bsemi.com)
initial port of linux to OpenRISC/or32 architecture.
all the core stuff is implemented and seams usable.

08. 12. 2003 Matjaz Breskvar (phoenix@bsemi.com)
complete change of TLB miss handling.
rewrite of exceptions handling.
fully functional sash-3.6 in default initrd.
a much improved version with changes all around.

10. 04. 2004 Matjaz Breskvar (phoenix@bsemi.com)
alot of bugfixes all over.
ethernet support, functional http and telnet servers.
running many standard linux apps.

26. 06. 2004 Matjaz Breskvar (phoenix@bsemi.com)
port to 2.6.x

30. 11. 2004 Matjaz Breskvar (phoenix@bsemi.com)
lots of bugfixes and enhancments.
added opencores framebuffer driver.

09. 10. 2010 Jonas Bonn (jonas@southpole.se)
major rewrite to bring up to par with upstream Linux 2.6.36