This patch adds support for generating DCD blocks. The DCD blocks can be
used to write values to memory or preconfigure the hardware or CPU.
Signed-off-by: Marek Vasut <marex@denx.de>

While the BootROM doesn't check the IVT header, the first and last
byte were swapped, so fix this.
Signed-off-by: Marek Vasut <marex@denx.de>

In this mode, the file contents will not be dumped and so will not
be presented any further output. The tool will only return a return
value depending on whether the verification passed or failed. This
is useful in scripts.
Signed-off-by: Marek Vasut <marex@denx.de>

The image key is part of the image context, don't make it into a
self-standing variable. Instead, wrap it into the image context
structure.
Signed-off-by: Marek Vasut <marex@denx.de>

When printing the section flags, the BOOTABLE flag is assigned via
a ternary operator, clean this up.
Signed-off-by: Marek Vasut <marex@denx.de>

If the file we try to verify is not aligned, it doesn't follow the
specification and is therefore corrupted. Check this condition early
in the process.
Signed-off-by: Marek Vasut <marex@denx.de>

The HAB flag was printed in such a manner that it unaligned the
dump of the image. Do a cosmetic fix.
Signed-off-by: Marek Vasut <marex@denx.de>

Check only 20 bytes of ths SHA1 sum of the whole image, as that's
the actual length of the SHA1 hash.
Signed-off-by: Marek Vasut <marex@denx.de>

The unaligned payload case is not well defined. The FSL tool luckily handles
it so that it stuffs random data at the end of the payload to align it. We will
do the same when verifying the image, we will up-align the data we read to 16b
and then operate on this as if it was aligned.
Signed-off-by: Marek Vasut <marex@denx.de>

When verifying the image, read the key from the image instead of expecting
a zero key. The FSL tool, even if explicitly told to use zero key, uses a
random key.
Signed-off-by: Marek Vasut <marex@denx.de>

Instead of passing an array to compute the CBC-MAC of the section
table, use directly the one in the key dictionary.
Signed-off-by: Marek Vasut <marex@denx.de>

Make sure the output filename is closed when generating the SB image.
This patch fixes an oversight that got in during the rework.
Signed-off-by: Marek Vasut <marex@denx.de>

To make better use of the type-checking capabilities of compiler,
replace the SB_HAB_IVT_HEADER macro with a function sb_hab_ivt_header(),
which does exactly the same thing.
Signed-off-by: Marek Vasut <marex@denx.de>

Use fopen/fclose/fread/fwrite/fseek/ftell functions to operate with
files to avoid using fdopen() and such. This also requires some data
type adjustment, which in turn removes some warnings produced by
clang analyzer.
Signed-off-by: Marek Vasut <marex@denx.de>

Instead of having such free-standing variables, wrap the input
and output file names into image context alongside configuration
file name.
Signed-off-by: Marek Vasut <marex@denx.de>

The values used in the SB configuration file must always be 32-bit
due to the MXS limitation. Make sure the input values are properly
sanitized.
Signed-off-by: Marek Vasut <marex@denx.de>

In the current setup, the sb_token_to_long() couldn't parse the full
range of unsigned values. Fix this by returning the converted value
via pointer reference and make the sb_token_to_long() return it's
return value properly.
Signed-off-by: Marek Vasut <marex@denx.de>

Make the data type used in crc32() call more precise to avoid clang
warnings with -Weverything.
Signed-off-by: Marek Vasut <marex@denx.de>

Use the ARRAY_SIZE macro consistently for the SB MODE command
table of options.
Signed-off-by: Marek Vasut <marex@denx.de>

This final test was missing in the tool, verification of the SHA1
digest of the whole image. Implement it.
Signed-off-by: Marek Vasut <marex@denx.de>

This header is present only on Linux, so get rid of it. The problem
is that we can no longer use __cpu_to_be16() function, which is Linux
specific. This function can be replaced in a slightly hackish way by
using the htons() call, as they do the same thing -- convert uint16_t
from the host endianness to the network endianness (which is BE). The
same goes the other way around, from __be16_to_cpu() is replaced by
ntohs(), which is again a slight hack.
Signed-off-by: Marek Vasut <marex@denx.de>

Rework the condition that checks whether user supplied the input/output
and configuration filenames correctly so that clang does not complain.
Signed-off-by: Marek Vasut <marex@denx.de>

This was a result of shuffling the code around, remove this useless
line.
Signed-off-by: Marek Vasut <marex@denx.de>

By using the -i option of MXSSB, one can now validate if the input
image is correct. MXSSB will also dump the contents of the image.
Signed-off-by: Marek Vasut <marex@denx.de>

The MODE command string-value mapping table will be re-used by
the image validator when it will be dumping the image contents,
so pull the table out from the function.
Signed-off-by: Marek Vasut <marex@denx.de>

Rework the crypto functions so they can both encrypt and decrypt
the payload. This will make use of them easy once we implement
image verification.
Signed-off-by: Marek Vasut <marex@denx.de>

Rename the functions to better match their purpose. This will come
helpful when implementing image verification.
Signed-off-by: Marek Vasut <marex@denx.de>

Documentation is a must, add proper README file for this tool.
Signed-off-by: Marek Vasut <marex@denx.de>

The last missing command is the MODE command. Implement this command
for the completeness of the command set.
Signed-off-by: Marek Vasut <marex@denx.de>

With the current parser, it is very easy to implement the commands.
Implement the FILL command, which fills the memory with pattern.
Signed-off-by: Marek Vasut <marex@denx.de>

The jump command is almost identical to the CALL command, with the
difference that CALL command saves stack and allows the called code
to return into the BootROM. JUMP command does not do that, it just
sets the PC register to a value and that's it.

The sematics of both commands are almost identical though, therefore
implement JUMP as a minor adjustment to CALL.
Signed-off-by: Marek Vasut <marex@denx.de>

It's year 2013 now, update the copyright message. Since the tool
now also supports MX233, mention it in the description.
Signed-off-by: Marek Vasut <marex@denx.de>

The command stream is now in a configuration file, the target_cpu
field is no longer used. Remove it.
Signed-off-by: Marek Vasut <marex@denx.de>

The section count can be calculated while parsing the configuration
file. Do it and then use it when filling the SB image header. Moreover,
the bootable section and possible multiple bootable sections collision
can also be much better identified while parsing the configuration file.
Signed-off-by: Marek Vasut <marex@denx.de>

Rework the command parser. The command parsing can happen when reading the
configuration file already, there is no need to read the configuration file
in and parse only the result. The parser is now executed directly on each
line that is read by from the configuration file instead and builds the image
tree right away.

Moreover, the parser is now implemented in much cleaner way and the command
and section generation is cleanly separated.

Finally, the memory usage of the tool went down by 20% .
Signed-off-by: Marek Vasut <marex@denx.de>

The IVT flag is completely useless now, especially since we treat
the IVT as yet another data payload rather than something special.
Signed-off-by: Marek Vasut <marex@denx.de>

Add the newly allocated section into the section list very early, so that
in case of a failure during command parsing, the section can be properly
deallocated with all the other sections.
Signed-off-by: Marek Vasut <marex@denx.de>

Report proper error messages when the command parsing function
fails. Also report line number at which the error happened.
Signed-off-by: Marek Vasut <marex@denx.de>

Move the line tokenization fully into the sb_tag_to_command().
Moreover, improve error return and reporting from this function.
Signed-off-by: Marek Vasut <marex@denx.de>

Save the number at which line the command was. This will help when
reporting errors from the parser.
Signed-off-by: Marek Vasut <marex@denx.de>