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Diffstat (limited to 'docs/system/openrisc/or1k-sim.rst')
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diff --git a/docs/system/openrisc/or1k-sim.rst b/docs/system/openrisc/or1k-sim.rst new file mode 100644 index 0000000000..ef10439737 --- /dev/null +++ b/docs/system/openrisc/or1k-sim.rst @@ -0,0 +1,43 @@ +Or1ksim board +============= + +The QEMU Or1ksim machine emulates the standard OpenRISC board simulator which is +also the standard SoC configuration. + +Supported devices +----------------- + + * 16550A UART + * ETHOC Ethernet controller + * SMP (OpenRISC multicore using ompic) + +Boot options +------------ + +The Or1ksim machine can be started using the ``-kernel`` and ``-initrd`` options +to load a Linux kernel and optional disk image. + +.. code-block:: bash + + $ qemu-system-or1k -cpu or1220 -M or1k-sim -nographic \ + -kernel vmlinux \ + -initrd initramfs.cpio.gz \ + -m 128 + +Linux guest kernel configuration +"""""""""""""""""""""""""""""""" + +The 'or1ksim_defconfig' for Linux openrisc kernels includes the right +drivers for the or1ksim machine. If you would like to run an SMP system +choose the 'simple_smp_defconfig' config. + +Hardware configuration information +"""""""""""""""""""""""""""""""""" + +The ``or1k-sim`` board automatically generates a device tree blob ("dtb") +which it passes to the guest. This provides information about the +addresses, interrupt lines and other configuration of the various devices +in the system. + +The location of the DTB will be passed in register ``r3`` to the guest operating +system. |