The current method of starting U-Boot from U-Boot adds arguments to pass
the memory file through, so that memory is preserved. This is fine for a
single call, but if we call from TPL -> SPL -> U-Boot the arguments build
up and we have several memory files in the argument list.

Adjust the implementation to filter out arguments that we want to replace
with new ones. Also print a useful error if the exec() call fails.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present sandbox calls malloc() from various places in the OS layer and
this results in calls to U-Boot's malloc() implementation. It is better to
use the on in the OS layer, since it does not mix allocations with the
main U-Boot code.

Fix this by replacing calls with malloc() to os_malloc(), etc.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NJoe Hershberger <joe.hershberger@ni.com>

At present os_jump_to_image() jumps to a given image, and this is written
to a file. But it is useful to be able to jump to a file also.

To avoid duplicating code, split out the implementation of
os_jump_to_image() into a new function that jumps to a file.
Signed-off-by: NSimon Glass <sjg@chromium.org>

We support putc() in this case but not puts(), but this is more useful
since it is what printf() uses.

This particularly affects debugging early in SPL, where currently printf()
statements result in no output. Fix this by adding a special case into
puts() for sandbox, just like putc().
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NJoe Hershberger <joe.hershberger@ni.com>

The old 'sb' command was deprecated in 2015 and replaced with 'host'. It
is useful to be able to access some internal sandbox state, particularly
for testing.

Resurrect the old command and provide a way to print some basic state
information (currently just the arguments to sandbox).
Signed-off-by: NSimon Glass <sjg@chromium.org>

The old 'sb' command was deprecated in 2015 and replaced with 'host'.
Remove the remaining users and the command, so that the name is available
for other purposes.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present we don't have a test that of-platdata can be accessed in SPL.
Add this in as a command-line option to SPL.
Signed-off-by: NSimon Glass <sjg@chromium.org>

It is sometimes useful to restart sandbox with some particular flags to
test certain functionality. Add a new method to ConsoleSandbox to handle
this, without changing the existing APIs.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Acked-by: NStephen Warren <swarren@nvidia.com>

We have a few things in the memory map now, so add documentation for this
to avoid confusion. Also note that it is possible to run all tests now.
Signed-off-by: NSimon Glass <sjg@chromium.org>

There is a strange feature to set global_data to a data-section variable
early in SPL. This only works if SPL actually has access to SRAM which is
not the case on x86, for eaxmple. Add a comment to this effect.
Reviewed-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>

Rather than having a negative option, make this a positive option and
enable it by default. This makes it easier to understand.
Reviewed-by: NTom Rini <trini@konsulko.com>
Signed-off-by: NSimon Glass <sjg@chromium.org>

We should use a macro rather than hard-coding the SPL prompt to 'spl'
since the code can be used by TPL too. Add a macro that works for both
and use it in various places.

This allows TPL to use the same code without printing confusing messages.

Note that the string is lower case ('spl', 'tpl') which is a change from
previously.
Reviewed-by: NTom Rini <trini@konsulko.com>
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present these subsystems are only supported in U-Boot proper but it is
sometimes necessary to support them in SPL, or even TPL. Update the
Kconfig and Makefile to support this. Also adjust GPIO so that it can be
used in TPL if required.
Reviewed-by: NTom Rini <trini@konsulko.com>
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add a description of the purpose of bloblist and how to use it.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add a unit test for the bloblist functionality and enable bloblist for
sandbox.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add support for locating a bloblist in U-Boot that has been set up by SPL.
It is copied into RAM during relocation.
Reviewed-by: NTom Rini <trini@konsulko.com>
Signed-off-by: NSimon Glass <sjg@chromium.org>

The bloblist is normally set up in SPL ready for use by U-Boot. Add
a simple implementation of this to the common SPL code.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present there is no standard way in U-Boot to pass information from SPL
to U-Boot proper. But sometimes SPL wants to convey information to U-Boot
that U-Boot cannot easily figure out. For example, if SPL sets up SDRAM
then it might want to pass the size of SDRAM, or the location of each
bank, to U-Boot proper.

Add a new 'bloblist' feature which provides this. A bloblist is set up in
the first phase of U-Boot that runs (i.e. TPL or SPL). The location of
this info may be in SRAM or CAR (x86 cache-as-RAM) or somewhere else.

Information placed in this region is preserved (with a checksum) through
TPL and SPL and ends up in U-Boot. At this point it is copied into SDRAM
so it can be used after relocation.
Reviewed-by: NTom Rini <trini@konsulko.com>
Signed-off-by: NSimon Glass <sjg@chromium.org>
Acked-by: NAndreas Dannenberg <dannenberg@ti.com>

It is sometimes useful to log information in SPL and TPL. Add support for
this.
Reviewed-by: NTom Rini <trini@konsulko.com>
Signed-off-by: NSimon Glass <sjg@chromium.org>

For a long time now, 'sb' has been deprecated as a command in favor of
using 'host' for the sandbox hostfs interface, switch.
Signed-off-by: NTom Rini <trini@konsulko.com>

Various minor sandbox improvements
Better buildman warning handling
Misc other things

It is useful to obtain the block-protect setting of the SPI flash, so we
know whether it is fully open or (perhaps partially) write-protected. Add
a method for this. Update the sandbox driver to process this operation and
add a test.
Signed-off-by: NSimon Glass <sjg@chromium.org>

The current test is a functional test, covering all the way from the
command line to the sandbox SPI driver. This is useful, but it is easier
to diagnose failures with a smaller test.

Add a simple test which reads and writes data and checks that it is stored
and retrieved correctly.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present these functions return 0 on success. For some devices we want
to know how many bytes were transferred. It seems useful to adjust the API
to be more like the POSIX read() and write() functions.

Update these two methods, a test and all users.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NPatrick Delaunay <patrick.delaunay@st.com>

At present the config header is not included in this file, but it does use
a CONFIG option. Fix it.
Signed-off-by: NSimon Glass <sjg@chromium.org>

It is useful to be able to invert the colours in some cases so that the
text matches the background colour. Add a parameter to the function to
support this.

It is strange that function takes a private data structure from another
driver as an argument. It seems better to pass the device and have the
function internally work out how to find its required information.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present, stripped files don't have the right pathname which means that
blob compression cannot be used. Fix this.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This comma is not needed. Drop it.
Signed-off-by: NSimon Glass <sjg@chromium.org>

When the build fails due to something wrong in binman it is sometimes
useful to get a full backtrace showing the location of the failure. Add
a BINMAN_DEBUG environment variable to support this along with some
documentation.
Signed-off-by: NSimon Glass <sjg@chromium.org>

In some cases U-Boot is compressed and it is useful to be able to
decompress it in SPL. Add a Kconfig and Makefile change to allow this.
Note that this does not actually implement decompression.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present these features are supported in SPL but not TPL. Update the
Kconfig and Makefile to allow this.

Also add a few Makefile comments to make earier to track what is going on.
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present sandbox drivers are mostly not used before relocation. Some of
these are needed by Chromium OS verified boot, since it uses sandbox TPL,
so update them accordingly.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This function is really just a call to uclass_get_device() and there is no
reason why the caller cannot do it. Update sandbox and snow accordingly.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Acked-by: NMinkyu Kang <mk7.kang@samsung.com>

Add a way to read a file from the host filesystem. This can be useful for
reading test data, for example. Also fix up the writing function which was
not the right version, and drop the debugging lines.
Signed-off-by: NSimon Glass <sjg@chromium.org>

It seems useful to make sandbox its own log category since it is used for
so much testing. Add this as a new category.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This is not normally useful, so change the code to avoid writing out every
data package. This can be enabled with #define DEBUG.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This adds new commands to the EC related to setting and clearing events
as well as controlling power-related settings.
Signed-off-by: NSimon Glass <sjg@chromium.org>

The LPC driver expects its buffer to be word-aligned. Add the required
flag to the uclass driver to ensure this.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This value is required for flashing to work correctly. Add a check for
it.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add some more logging to provide more information on failures.
Signed-off-by: NSimon Glass <sjg@chromium.org>