5 This is a port of Linux to the OpenRISC class of microprocessors; the initial
6 target architecture, specifically, is the 32-bit OpenRISC 1000 family (or1k).
8 For information about OpenRISC processors and ongoing development:
10 ======= =============================
11 website https://openrisc.io
12 email openrisc@lists.librecores.org
13 ======= =============================
15 ---------------------------------------------------------------------
17 Build instructions for OpenRISC toolchain and Linux
18 ===================================================
20 In order to build and run Linux for OpenRISC, you'll need at least a basic
21 toolchain and, perhaps, the architectural simulator. Steps to get these bits
22 in place are outlined here.
26 Toolchain binaries can be obtained from openrisc.io or our github releases page.
27 Instructions for building the different toolchains can be found on openrisc.io
28 or Stafford's toolchain build and release scripts.
30 ========== =================================================
31 binaries https://github.com/openrisc/or1k-gcc/releases
32 toolchains https://openrisc.io/software
33 building https://github.com/stffrdhrn/or1k-toolchain-build
34 ========== =================================================
38 Build the Linux kernel as usual::
40 make ARCH=openrisc CROSS_COMPILE="or1k-linux-" defconfig
41 make ARCH=openrisc CROSS_COMPILE="or1k-linux-"
43 3) Running on FPGA (optional)
45 The OpenRISC community typically uses FuseSoC to manage building and programming
46 an SoC into an FPGA. The below is an example of programming a De0 Nano
47 development board with the OpenRISC SoC. During the build FPGA RTL is code
48 downloaded from the FuseSoC IP cores repository and built using the FPGA vendor
49 tools. Binaries are loaded onto the board with openocd.
53 git clone https://github.com/olofk/fusesoc
58 fusesoc build de0_nano
61 openocd -f interface/altera-usb-blaster.cfg \
62 -f board/or1k_generic.cfg
66 > halt; load_image vmlinux ; reset
68 4) Running on a Simulator (optional)
70 QEMU is a processor emulator which we recommend for simulating the OpenRISC
71 platform. Please follow the OpenRISC instructions on the QEMU website to get
72 Linux running on QEMU. You can build QEMU yourself, but your Linux distribution
73 likely provides binary packages to support OpenRISC.
75 ============= ======================================================
76 qemu openrisc https://wiki.qemu.org/Documentation/Platforms/OpenRISC
77 ============= ======================================================
79 ---------------------------------------------------------------------
84 In the code, the following particles are used on symbols to limit the scope
85 to more or less specific processor implementations:
87 ========= =======================================
88 openrisc: the OpenRISC class of processors
89 or1k: the OpenRISC 1000 family of processors
90 or1200: the OpenRISC 1200 processor
91 ========= =======================================
93 ---------------------------------------------------------------------
98 18-11-2003 Matjaz Breskvar (phoenix@bsemi.com)
99 initial port of linux to OpenRISC/or32 architecture.
100 all the core stuff is implemented and seams usable.
102 08-12-2003 Matjaz Breskvar (phoenix@bsemi.com)
103 complete change of TLB miss handling.
104 rewrite of exceptions handling.
105 fully functional sash-3.6 in default initrd.
106 a much improved version with changes all around.
108 10-04-2004 Matjaz Breskvar (phoenix@bsemi.com)
109 alot of bugfixes all over.
110 ethernet support, functional http and telnet servers.
111 running many standard linux apps.
113 26-06-2004 Matjaz Breskvar (phoenix@bsemi.com)
116 30-11-2004 Matjaz Breskvar (phoenix@bsemi.com)
117 lots of bugfixes and enhancments.
118 added opencores framebuffer driver.
120 09-10-2010 Jonas Bonn (jonas@southpole.se)
121 major rewrite to bring up to par with upstream Linux 2.6.36