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Implement the -a option to pad dtb aligned

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There is one condition that need cat the dtb files
into one dtb.img which can support several boards
use same SoC platform.

And the original dtb file size is not aligned to any base.
This may cause "Synchronous Abort" when load from a unligned
address on some SoC machine, such as ARM.

So this patch implement the -a <aligned number> option to
pad zero at the end of dtb files and make the dtb size aligned
to <aligned number>.

Then, the aligned dtbs can cat together and load without "Synchronous
Abort".

Signed-off-by: Tim Wang <timwang@asrmicro.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Tim Wang 2016-07-18 15:56:53 +08:00 • committed by David Gibson
parent 1ed45d40a1
commit 874f40588d
4 changed files with 58 additions and 5 deletions
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dtc.h
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@ -53,6 +53,7 @@ extern int quiet; /* Level of quietness */
extern int reservenum; /* Number of memory reservation slots */
extern int minsize; /* Minimum blob size */
extern int padsize; /* Additional padding to blob */
extern int alignsize; /* Additional padding to blob accroding to the alignsize */
extern int phandle_format; /* Use linux,phandle or phandle properties */
#define PHANDLE_LEGACY 0x1