docs/system/target-openrisc.rst

1 .. _OpenRISC-System-emulator:
3 OpenRISC System emulator
6 QEMU can emulate 32-bit OpenRISC CPUs using the ``qemu-system-or1k`` executable.
8 OpenRISC CPUs are generally built into "system-on-chip" (SoC) designs that run
10 (the original OpenRISC instruction level simulator) which QEMU supports. For
11 this reason QEMU does not need to support many different boards to support the
14 The OpenRISC CPU supported by QEMU is the ``or1200``, it supports an MMU and can
20 For QEMU's OpenRISC system emulation, you must specify which board model you
21 want to use with the ``-M`` or ``--machine`` option; the default machine is
22 ``or1k-sim``.
25 will boot on any of the QEMU machines. To do this one would compile all required
26 drivers into the kernel. This is possible because QEMU will create a device tree
27 structure that describes the QEMU machine and pass a pointer to the structure to
32 If you already have a system image or a kernel that works on hardware and you
33 want to boot with QEMU, check whether QEMU lists that machine in its ``-machine
36 on QEMU. (You might be able to extract the filesystem and use that with a
37 different kernel which boots on a system that QEMU does emulate.)
47 Board-specific documentation
58    openrisc/or1k-sim
71    openrisc/cpu-features