Adds operating system version and security patch level to the boot
image header. This change take into use one of the existing unused
fields to preserve compatibility.
Note: All information is packed into a single field, because there
are a lot of existing devices that break if the first unused field
is set to a non-zero value.
Bug: 27498078
Bug: 22914603
Change-Id: I24953129e06019b95014a050e916fe4f5c199286
Adds operating system version and security patch level to the boot
image header. This change takes over two existing unused fields to
preserve compatibility with existing devices.
Bug: 27498078
Bug: 22914603
Change-Id: I57682611e0c27fec5ed284da7d9a788383ff98b1
We can't simply increase the value of BOOT_ARGS_SIZE since that
would break past binary compatibility; the offset of 'id' would
change. This can cause serious problems with incremental OTA updates.
Instead, define a supplemental field which stores command line
information beyond the first 512 bytes. A value of 1024 was chosen
to keep the total size of struct boot_img_hdr under the smallest
page size of 2048 bytes.
Even if the extra_cmdline field is used, the original cmdline
field is still always NULL-terminated to avoid issues with older
bootloaders that haven't been updated.
Change-Id: I887e6f1db351a5b71a61e3a03363cf8856123d74
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
