b14df228d7
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Stafford Horne <shorne@gmail.com>
44 lines
1.2 KiB
ReStructuredText
44 lines
1.2 KiB
ReStructuredText
Or1ksim board
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=============
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The QEMU Or1ksim machine emulates the standard OpenRISC board simulator which is
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also the standard SoC configuration.
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Supported devices
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-----------------
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* 16550A UART
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* ETHOC Ethernet controller
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* SMP (OpenRISC multicore using ompic)
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Boot options
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------------
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The Or1ksim machine can be started using the ``-kernel`` and ``-initrd`` options
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to load a Linux kernel and optional disk image.
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.. code-block:: bash
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$ qemu-system-or1k -cpu or1220 -M or1k-sim -nographic \
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-kernel vmlinux \
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-initrd initramfs.cpio.gz \
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-m 128
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Linux guest kernel configuration
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""""""""""""""""""""""""""""""""
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The 'or1ksim_defconfig' for Linux openrisc kernels includes the right
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drivers for the or1ksim machine. If you would like to run an SMP system
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choose the 'simple_smp_defconfig' config.
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Hardware configuration information
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""""""""""""""""""""""""""""""""""
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The ``or1k-sim`` board automatically generates a device tree blob ("dtb")
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which it passes to the guest. This provides information about the
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addresses, interrupt lines and other configuration of the various devices
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in the system.
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The location of the DTB will be passed in register ``r3`` to the guest operating
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system.
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