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arm: add device tree support

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If compiled with CONFIG_FDT, allow user to specify a device tree file using
the -dtb argument.  If the machine supports it then the dtb will be loaded
into memory and passed to the kernel on boot.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
[Peter Maydell: Use machine opt rather than global to pass dtb filename]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Grant Likely 2012-03-02 11:56:38 +00:00 • committed by Peter Maydell
parent 41c1e2f54e
commit 412beee6a0
7 changed files with 120 additions and 6 deletions
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9
qemu-options.hx
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@ -2037,6 +2037,15 @@ Use @var{file1} and @var{file2} as modules and pass arg=foo as parameter to the
first module.
ETEXI
DEF("dtb", HAS_ARG, QEMU_OPTION_dtb, \
"-dtb file use 'file' as device tree image\n", QEMU_ARCH_ARM)
STEXI
@item -dtb @var{file}
@findex -dtb
Use @var{file} as a device tree binary (dtb) image and pass it to the kernel
on boot.
ETEXI
STEXI
@end table
ETEXI