cbfsutil completely changed the way that stages are formatted in CBFS.
Adjust the binman implementation to do the same.

This mirrors commit 81dc20e744 in coreboot.

Signed-off-by: Simon Glass <sjg@chromium.org>

In preparation for changing how stages are stored, rename the existing
stage tag.

Signed-off-by: Simon Glass <sjg@chromium.org>

cbfsutil changed to 4-byte alignment for filenames instead of 16.
Adjust the binman implementation to do the same.

This mirrors commit 5779ca718c in coreboot.

Signed-off-by: Simon Glass <sjg@chromium.org>

cbfsutil changed to write zero bytes instead of 0xff when a small
padding must be added. Adjust the binman implementation to do the same.

Drop the code which looks for an unused attribute tag, since it is not
used. A future patch moves the attributes to the end of the header in
any case, so no data will follow the attributes.

This mirrors commit f0cc7adb2f in coreboot.

Signed-off-by: Simon Glass <sjg@chromium.org>

cbfsutil changed to skip adding a compression attribute if there is no
compression. Adjust the binman implementation to do the same.

This mirrors commit 105cdf5625 in coreboot.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Neha Malcom Francis <n-francis@ti.com>

The patman directory has a number of modules which are used by other tools
in U-Boot. This makes it hard to package the tools using pypi since the
common files must be copied along with the tool that uses them.

To address this, move these files into a new u_boot_pylib library. This
can be packaged separately and listed as a dependency of each tool.

Signed-off-by: Simon Glass <sjg@chromium.org>

Select the lz4 and lzma_alone bintools in cbfs_util class to centralize
the supported compression algorithm evaluation inside the class and over
multiple classes.

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Remove the obsolete compressed data header handling from the utilities
to compress and decompress data. The header is uncommon, not supported
by U-Boot and incompatible with external compressed artifacts.

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Convert this file to snake case and update all files which use it.

Signed-off-by: Simon Glass <sjg@chromium.org>

Tweak some naming and comments to resolve these. Use WriteFile() to write
the file.

Signed-off-by: Simon Glass <sjg@chromium.org>