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GXemul supports MIPS Malta but with some limitations.
The most notable problems:
* PCI-enabled barebox just hangs under GXemul;
* by default gxemul uses 5Kc processor,
so we have to force MIPS32R1 processor usage.
To fix these problems the special gxemul-malta_defconfig
is introduced and the board's documentation is updated.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
53 lines
1.1 KiB
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53 lines
1.1 KiB
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QEMU Malta
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==========
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Big-endian mode
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---------------
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QEMU run string::
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qemu-system-mips -nodefaults -M malta -m 256 \
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-nographic -serial stdio -monitor null \
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-bios barebox-flash-image
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Little-endian mode
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------------------
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Running little-endian Malta is a bit tricky.
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In little-endian mode the 32bit words in the boot flash image are swapped,
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a neat trick which allows bi-endian firmware.
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You have to swap words of ``zbarebox.bin`` image, e.g.::
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echo arch/mips/pbl/zbarebox.bin \
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| cpio --create \
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| cpio --extract --swap --unconditional
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QEMU run string::
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qemu-system-mipsel -nodefaults -M malta -m 256 \
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-nographic -serial stdio -monitor null \
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-bios barebox-flash-image
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Using GXemul
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------------
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GXemul supports MIPS Malta except PCI stuff.
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You can use GXemul to run little-endian barebox (use gxemul-malta_defconfig).
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N.B. There is no need to swap words in ``zbarebox.bin`` for little-endian GXemul!
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GXemul run string::
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gxemul -Q -e malta -M 256 0xbfc00000:barebox-flash-image
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Links
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-----
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* http://www.linux-mips.org/wiki/Mips_Malta
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* http://www.qemu.org/
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* http://gxemul.sourceforge.net/
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