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Documentation: openrisc: Updates to README

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Update the OpenRISC readme to provide some more up-to-date information
on how to get started with OpenRISC.  This includes:

 - remove references to southpole who no longer are consulting for
   OpenRISC (confirmed with Jonas)
 - suggested QEMU instead of the old or1ksim as QEMU is well supported
 - include instructions on how to get an FPGA board running

Suggested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Stafford Horne <shorne@gmail.com>
This commit is contained in:
Stafford Horne 2017-10-21 22:39:09 +09:00
parent 00aa61d36d
commit e4082de21c
1 changed files with 39 additions and 28 deletions
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Documentation/openrisc/README
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@ -7,13 +7,7 @@ target architecture, specifically, is the 32-bit OpenRISC 1000 family (or1k).
For information about OpenRISC processors and ongoing development:
website http://openrisc.io
For more information about Linux on OpenRISC, please contact South Pole AB.
email: info@southpole.se
website: http://southpole.se
http://southpoleconsulting.com
email openrisc@lists.librecores.org
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@ -24,37 +18,54 @@ 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.io. Instructions for building
a toolchain can be found at:
1) Toolchain
https://github.com/openrisc/tutorials
Toolchain binaries can be obtained from openrisc.io or our github releases page.
Instructions for building the different toolchains can be found on openrisc.io
or Stafford's toolchain build and release scripts.
2) or1ksim (optional)
binaries https://github.com/openrisc/or1k-gcc/releases
toolchains https://openrisc.io/software
building https://github.com/stffrdhrn/or1k-toolchain-build
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.
2) Building
git clone https://github.com/openrisc/or1ksim.git
cd or1ksim
./configure --prefix=$OPENRISC_PREFIX
make
make install
3) Linux kernel
Build the kernel as usual
Build the Linux kernel as usual
make ARCH=openrisc defconfig
make ARCH=openrisc
4) Run in architectural simulator
3) Running on FPGA (optional)
Grab the or1ksim platform configuration file (from the or1ksim source) and
together with your freshly built vmlinux, run your kernel with the following
incantation:
The OpenRISC community typically uses FuseSoC to manage building and programming
an SoC into an FPGA. The below is an example of programming a De0 Nano
development board with the OpenRISC SoC. During the build FPGA RTL is code
downloaded from the FuseSoC IP cores repository and built using the FPGA vendor
tools. Binaries are loaded onto the board with openocd.
sim -f arch/openrisc/or1ksim.cfg vmlinux
git clone https://github.com/olofk/fusesoc
cd fusesoc
sudo pip install -e .
fusesoc init
fusesoc build de0_nano
fusesoc pgm de0_nano
openocd -f interface/altera-usb-blaster.cfg \
-f board/or1k_generic.cfg
telnet localhost 4444
> init
> halt; load_image vmlinux ; reset
4) Running on a Simulator (optional)
QEMU is a processor emulator which we recommend for simulating the OpenRISC
platform. Please follow the OpenRISC instructions on the QEMU website to get
Linux running on QEMU. You can build QEMU yourself, but your Linux distribution
likely provides binary packages to support OpenRISC.
qemu openrisc https://wiki.qemu.org/Documentation/Platforms/OpenRISC
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