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For builtin dtbs all compiled dtbs matching section .dtb.rodata.*
are collected in a single section. Since every dtb is compiled as
uncompressed and also as compressed binary each dtb ends up twice
in the section. Let's put the compressed variants in .dtbz.rodata.*
sections rather than .dtb.rodata.*.z so they end up in the binary
only once.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Daniel Krüger <daniel.krueger@systec-electronic.com>
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In the current multi image build process the DTBs end up uncompressed
in the PBL. This can be annoying because the PBL is often very size
constrained.
This patch allows to put the DTBs in as lzo compressed binary into
the PBL. Since lzo offers quite good compression ratios for DTBs no
other compression algorithm has been implemented for now.
Boards which want to use the compressed DTBs only have to change
the __dtb_ prefix in the DTB name to __dtb_z_. Also they should select
ARM_USE_COMPRESSED_DTB to make sure barebox supports uncompressing
the DTB.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Patch 97e81f2d78f3 (Add support for metadata in barebox images)
writes the wrong length for the model tag in the barebox metadata.
Fix this to use the correct value.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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It's often useful to get some information about a barebox image
before starting or flashing it. This patch introduces barebox
Image MetaData (IMD). When enabled a barebox image will contain
a list of tags containing the desired information. We have tags
for:
- the barebox release (2014.07.0-00160-g035de50-dirty)
- the build timestamp (#741 Mon Jul 28 15:08:54 CEST 2014)
- the board model the image is intended for
- the device tree toplevel compatible property
Also there is an additional generic key-value store which stores
parameters for which no dedicated tag exists. In this patch it
is used for the memory size an image supports.
Since there is no fixed offset in a barebox image which can be
used for storing the information, the metadata is stored somewhere
in the image and found by iterating over the image. This works
for most image types, but obviously not for SoC images which are
encoded or encrypted in some way.
There is a 'imd' tool compiled from the same sources for barebox,
for the compile host and for the target, so the metadata information
is available whereever needed.
For device tree boards the model and of_compatible tags are automatically
generated.
Example output of the imd tool for a Phytec phyFLEX image:
build: #889 Wed Jul 30 16:08:54 CEST 2014
release: 2014.07.0-00167-g6b2070d-dirty
parameter: memsize=1024
of_compatible: phytec,imx6x-pbab01 phytec,imx6dl-pfla02 fsl,imx6dl
model: Phytec phyFLEX-i.MX6 Duallite Carrier-Board
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Using shell in make to generate an assembly file is not very
readable and extendable. Add an external shell script instead.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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