The current tests for fdt_node_check_compatible() test that it returns true
on several matching cases, but don't test that it actually returns false on
some non-matching cases, which isn't great coverage. Add some basic tests
to address that.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
In a number of places, dtc and associated tools and test code use
leading _ characters on identifiers to flag them as "internal", an
idiom taken from the Linux kernel. This is a bad idea in a userspace
program, because identifiers with a leading _ are reserved for the C
library / system.
In some cases, the extra _ served no real purpose, so simply drop it. In
others move to the end of the identifier, which is a convention we're free
to use for our own purposes.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
A comment in tests/stringlist.c refers to fdt_get_string(), which is not a
function that exists. From the content, it's supposed to be referring to
fdt_getprop_string().
A comment in libfdt.h has an extraneous space in a function name.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At least some clang versions (correctly) warn that 'size' is used
unititialized, if sw_tree1 is invoked with argc > 2. This corrects the
warning.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
For testing we (ab)use the assembler to build us a sample dtb, independent
of the other tools (dtc and libfdt) that we're trying to test. In a few
places this uses 64-bit arithmetic to decompose 64-bit constants into
the individual bytes in the blob.
Unfortunately, it seems that some builds of GNU as don't support >32 bit
arithmetic, though it's not entirely clear to me which do and which don't
(Fedora i386 does support 64-bit, Debian arm32 doesn't).
Anyway, to be safe, this avoids 64-bit arithmetic in assembler at the cost
of some extra awkwardness because we have to define the values in 32-bit
halves.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a single test makeing sure the &foo { }; syntax works.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a check for nodes with interrupts property that they have a valid
parent, the parent has #interrupt-cells property, and the size is a
valid multiple of #interrupt-cells.
This may not handle every possible case and doesn't deal with
translation thru interrupt-map properties, but should be enough for
modern dts files.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The GPIO binding is different compared to other phandle plus args
properties in that the property name has a variable, optional prefix.
The format of the property name is [<name>-]gpio{s} where <name> can
be any legal property string. Therefore, custom matching of property
names is needed, but the common check_property_phandle_args() function
can still be used.
It's possible that there are property names matching which are not GPIO
binding specifiers. There's only been one case found in testing which is
"[<vendor>,]nr-gpio{s}". This property has been blacklisted and the same
should be done to any others we find. This check will prevent getting
any more of these, too.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Many common bindings follow the same pattern of client properties
containing a phandle and N arg cells where N is defined in the provider
with a '#<specifier>-cells' property such as:
intc0: interrupt-controller@0 {
#interrupt-cells = <3>;
};
intc1: interrupt-controller@1 {
#interrupt-cells = <2>;
};
node {
interrupts-extended = <&intc0 1 2 3>, <&intc1 4 5>;
};
Add checks for properties following this pattern.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add this into the class to simplify use of this function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add this into the class to simplify use of this function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add this into the class to simplify use of this function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add this into the class to simplify use of this function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present 'make check' succeeds even if some tests fail. Adjust this so
that we can use things like 'git bisect run make check' to find a failure.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Some systems may have the Python libfdt.py library installed. Adjust the
tests to prepend the local libfdt path so that we test the local version
instead of the system version.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Using the libfdt function without going through the Python Fdt class
requires use of the uint32_t type. Add a test that this works correctly.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a stacked overlay unit test, piggybacking on fdtoverlay.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, both legacy (linux,phandle) and ePAPR (phandle) properties
are inserted into dtbs by default. The newer ePAPR style has been
supported in dtc and Linux kernel for 7 years. That should be a long
enough transition period. We can save a little space by not putting both
into the dtb.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add an fdtoverlay unit test. Applies applies overlay(s) and then
retrieves an inserted property to verify.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Since 548aea2 "fdtdump: Discourage use of fdtdump", fdtdump unconditionally
prints a message discouraging its own use except for debugging purposes.
This shows up messily in the "make check" output, so suppress it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When determining if to recurse into a node, get_node_by_path does not
check if the length of each node name is equal. If searching for
/foo/baz, this can result in recursing into /foobar because
strneq("foo", "foobar", 3) is true.
This can result in a reference to /foo/baz to be incorrectly set to
/foobar/baz. A test for this was added.
Signed-off-by: Tim Montague <tmontague@ghs.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present we require that setup.py is executed from the Makefile, which
sets up various important things like the list of files to build and the
version number.
However many installation systems expect to be able to change to the
directory containing setup.py and run it. This allows them to support (for
example) building/installing for multiple Python versions, varying
installation paths, particular C flags, etc.
The problem in implementing this is that we don't want to duplicate the
information in the Makefile. A common solution (so I am told) is to parse
the Makefile to obtain the required information.
Update the setup.py script to read a few Makefiles when it does not see
the required information in its environment. This allows installation
using:
./pylibfdt/setup.py install
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The existing function to add a new property to a tree being built requires
that the entire contents of the new property be passed in. For some
applications it is more convenient to be able to add the property contents
later, perhaps by reading from a file. This avoids double-buffering of the
contents.
Add a new function to support this and adjust the existing fdt_property() to
use it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
If swig and the Python are available, build pylibfdt automatically.
Adjust the tests to run Python tests too in this case.
Signed-off-by: Simon Glass <sjg@chromium.org>
[dwg: Make error message clearer that missing swig or python-dev isn't
fatal to the whole build]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a set of tests to cover the functionality in pylibfdt.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Node name unit-addresses should generally never begin with 0x or leading
0s. Add warnings to check for these cases, but only for nodes without a
known bus type as there should be better bus specific checks of the
unit address in those cases. Any unit addresses that don't follow the
general rule will need to add a new bus type. There aren't any known
ones ATM.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This bug has been found by using clang Static Analyzer: it reported that
the value stored to fdt was never read.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This fixes a great many sparse warnings on the fdt and libfdt sources.
These are mostly due to incorrect mixing of endian annotated and native
integer types.
This includes fixing a couple of quasi-bugs where we had endian conversions
the wrong way around (this will have the right effect in practice, but is
certainly conceptually incorrect).
This doesn't make the whole tree sparse clean: there are many warnings in
bison and lex generated code, and there are a handful of other remaining
warnings that are (for now) more trouble than they're worth to fix (and
are not genuine bugs).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Device trees can contain empty (zero length) properties, which are often
used as boolean flags. These can already be created using fdt_setprop()
passing a length of zero and a pointer which is ignored. It is safe to
pass NULL, but that may not be obvious from the interface. To make it
clearer, add an fdt_setprop_empty() helper macro.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
If we have a construct like this:
label: &handle {
...
};
Running dtc on it will cause a segfault, because we use 'target'
when it could be NULL. Move the add_label() call into the if
statement to fix this potentially bad use of a NULL pointer.
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At the moment we generate a __symbols__ node if -@ is specified OR if the
dts has the /plugin/ tag. That difference in behaviour from handling base
trees is unnecessary and slightly confusing. It also means it's impossible
to create a plugin without symbols. Since symbols in a plugin are only
useful in the case of stacked plugins - and libfdt doesn't even support
merging plugin symbols as part of overlay application yet - that's a thing
that might be useful.
So make __symbols__ generation depend only on -@. We also remove remove
the testcases that checked explicitly for this not very useful behaviour.
Instead we don't use -@ for our basic overlay testcase, and check that
symbols are not generated.
At some point in the future we should add support for symbol merging to
libfdt and add testcases for stacked overlay application.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Using -@ again here obscures what's going on, because at the end we can't
know which run actually generated the symbols node. We should just
generate the symbols on the first run and leave it at that.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
I think these were for an additional command line option which got dropped
during development. At this point all they're testing is that fixups don't
get generated for a non /plugin/ tree, which is already tested with one of
the simpler cases previously.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This changes the names of the testfiles for a number of the testcases of
the dtc overlay generation functionality to make them shorter and a bit
cleaerer what's going on. In addition we move some of the check_path
sanity checks closer to the dtc commands they verify.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At the moment we have some rudimentary tests of the fdt_overlay_apply()
function which don't rely on overlay generation support in dtc. This is
done by avoiding any external references in the sample overlay, in
particularly using the 'target-path' syntax instead of 'target' to avoid
needing external references in the fragment targets. Thus this test case
doesn't exercise libfdt's processing of the __fixups__ node at all.
We do test that somewhat in combination with dtc's overlay support.
However, in the interests of being able to quickly determine which side a
bug is on, it would be nice to exercise this without requiring the dtc
support.
This adds testcases to do so, by making some examples with manually
constructed __symbols__ and __fixups__ nodes. In addition we rename some
of the test data files and add some extra check_path tests to make it a bit
clearer what's going on here.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Two test programs - check_path and overlay - define a CHECK() helper macro
in such a way that in the case of an error it will re-execute the checked
code fragment, instead of using the return value from the initial call.
This can lead to misreporting errors, because the code may fail in a
different way the second time around due to changes made during the first
failing call.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The various tests for overlay/plugin support are currently lumped together
in the overlay_tests shell function, which is executed by libfdt_tests.
However, this includes both tests designed primarily to exercise libfdt's
overlay application, and tests designed to exercise dtc's overlay
generation. Split these up for improved clarity.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The current testcases for the -A "auto alias generation" option operate on
a "plugin" tree. Although not technically wrong, this is an odd approach,
since a plugin will almost certainly need the __symbols__ and/or __fixups__
syntax instead of aliases. On the other hand -A may be useful simply for
generating aliases on a tree which is not using the overlay / plugin
mechanism at all.
Therefore change the tests to operate on a base tree example instead of a
plugin.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When overlay apply supprt was added to libfdt the testcases included some
which could only be executed with the (then) out of tree dtc with overlay
output support. So, the test script automatically skipped those tests if
it wasn't available.
Now that the overlay support is merged into dtc mainline there's no reason
to keep this logic. Instead run all the overlay tests unconditionally.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a number of tests for dynamic objects/overlays.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a test that checks for existence or not of a node.
It is useful for testing the various cases when generating
symbols and fixups for dynamic device tree objects.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Rename the blobs to have a more explicit output that will give us a clearer
idea about whether a DT (and the test) has been compiled using a dtc with
our without overlays support.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The compiled blobs in the overlay tests do not have the test suffix which
is usually used to clean up and ignore the test artifacts.
Let's add that suffix.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The bad fixups tests were meant to be usable even for a non-overlay-enabled
dtc.
Move them out of that check.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Using 'index' as a local variable name shadows the standard library index()
function. This causes warnings on at least some compiler versions. The
recently added overlay code has a number of instances of this.
This patch replaces 'index' with 'poffset', since 'index' is being used to
mean "offset within a property value" in these cases.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add some test infrastructure to test that the overlay can be merged, but
also that poorly formatted fixups would fail as expected.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
[dwg: Don't execute bad overlay tests without overlay aware dtc]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We just added the -a option to allow padding of the output dtb's size to
a specified alignment. Unfortunately the test cases for this had several
bugs:
* Didn't actually test anything since "alignbase" instead of $alignbase
was passed to the checker function
* Introduced an unnecessary run_local_test wrapper
* Didn't provide very helpful output on failure
* Only attempted to check one alignment value
This patch fixes up these problems.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
There is one condition that need cat the dtb files
into one dtb.img which can support several boards
use same SoC platform.
And the original dtb file size is not aligned to any base.
This may cause "Synchronous Abort" when load from a unligned
address on some SoC machine, such as ARM.
So this patch implement the -a <aligned number> option to
pad zero at the end of dtb files and make the dtb size aligned
to <aligned number>.
Then, the aligned dtbs can cat together and load without "Synchronous
Abort".
Signed-off-by: Tim Wang <timwang@asrmicro.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a function to modify inplace only a portion of a property..
This is especially useful when the property is an array of values, and you
want to update one of them without changing the DT size.
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
[dwg: Remove unnecessary unsigned qualifier, correct a comment]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a function to retrieve the highest phandle in a given device tree.
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Implement a macro based on fdt_first_property_offset and
fdt_next_property_offset that provides a convenience to iterate over all
the properties of a given node.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Simon Glass <sjg@chromium.org>
[dwg: Removed a stray trailing blank line]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The fdt_for_each_subnode() iterator macro provided by this patch can be
used to iterate over a device tree node's subnodes. At each iteration a
loop variable will be set to the next subnode.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch allows dtc to accept multiple /dts-v1/ tags (provided they're
all at the beginning of the input), rather than giving a syntax error.
This makes it more convenient to include one .dts file from another without
having to be careful that the /dts-v1/ tag is in exactly one of them.
We a couple of existing testcases to take advantage of this, which
simplifies them slightly.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
ePAPR 1.1 section 2.2.1.1 "Node Name Requirements" specifies that any
node that has a reg property must include a unit address in its name
with value matching the first entry in its reg property. Conversely, if
a node does not have a reg property, the node name must not include a
unit address. Also allow ranges property as it is deemed valid, but ePAPR
is not clear about it.
Implement a check for this. The code doesn't validate the format of the
unit address; ePAPR implies this may vary from (containing bus) binding
to binding, so doing so would be much more complex.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
[robh: also allow non-empty ranges]
Signed-off-by: Rob Herring <robh@kernel.org>
[moved new test in check_table]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We have a couple of checks of the form:
if (offset+size > totalsize)
die();
We need to check that offset+size doesn't overflow, otherwise the check
will pass, and we may access past totalsize.
Found with AFL.
Signed-off-by: Anton Blanchard <anton@samba.org>
[Added a testcase]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
1937095 "Prevent crash on division by zero" fixed a crash when attempting
a division by zero using the / operator in a dts. However, it missed the
precisely equivalent crash with the % (modulus) operator. This patch fixes
the oversight.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
In order to work with preprocessed dts files more easily, dts will parse
line number information in the form emitted by cpp.
Anton Blanchard (using a fuzzer) reported that including a line number
directive with a nul character (a literal nul in the input file, not a \0
sequence) would cause dtc to SEGV. I spotted several more problems on
examining the code:
* It modified yytext in place which seems to work, but is ugly and I'm
not sure if it's safe on all lex/flex versions
* The regexp used in the lexer to recognize line number information
accepts strings with escape characters, but it won't process these
escapes.
- GNU cpp at least, will generate \ escapes in line number
information, at least with files containing " or \ in the name
This patch reworks the handling of line number information to address
these problems. \ escapes should now be handled directly. nuls in file
names (either with a literal nul in the input file, or with a \0 escape
sequence) are still not permitted, but will now result in a lexical error
rather than a SEGV.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
If a dts file contains a string with \ followed by a nul byte - an actual
nul in the input file, not the \\0 escape - then the assert() in
get_escape_char() will trip, crashing dtc.
As far as I can tell, there isn't any valid need for this assert(), so just
remove it.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The code handling integer literals in dtc-lexer.l assumes that the flex
regexp means that strtoull() can't fail to interpret the string as a valid
integer (either decimal, octal, or hexadecimal). This is not true for
octals. For example '09' is accepted as a literal by the regexp,
strtoull() attempts to handle it as octal, but it has a bad digit.
This changes the code to give a more useful error in this case.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, attempting to divide by zero in an integer expression in a dts
file will cause dtc to crash with a division by zero (SIGFPE).
This patch corrects this to properly detect this case and raise an error.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Given a device tree node, a property name and an index, the new function
fdt_stringlist_get() will return a pointer to the index'th string in the
property's value and return its length (or an error code on failure) in
an output argument.
Signed-off-by: Thierry Reding <treding@nvidia.com>
[Fix some -Wshadow warnings --dwg]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The new fdt_stringlist_search() function will look up a given string in
the list contained in the value of a named property of a given device
tree node and return its index.
Signed-off-by: Thierry Reding <treding@nvidia.com>
[Fix some -Wshadow warnings --dwg]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Given a device tree node and a property name, the fdt_stringlist_count()
function counts the number of strings found in the property value.
This also adds a new error code, FDT_ERR_BADVALUE, that the function
returns when it encounters a non-NUL-terminated string list.
Signed-off-by: Thierry Reding <treding@nvidia.com>
[Changed testcase name --dwg]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
On systems where 'char' is signed, fdtdump will currently print the wrong
thing on properties containing bytestring values with "negative" bytes
(that is with values from 0x80..0xff). The fdtdump testcase is extended
to cover this case too.
This corrects the problem by forcing use of unsigned char - although this
is perhaps another indication that fdtdump is a buggy hack and if you want
to do real work you should use dtc -O dts.
Reported-by: Igor Prusov <Igor.V.Prusov@mcst.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The overall test runner script, for the fdtdump tests invokes the helper
script fdtdump-runtest.sh. It then includes directly some code very
similar to fdtdump-runtest.sh, which is never reached due to a "return".
Remove the never-reached test code.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The test script includes several specific tests for the handling of aliases
in fdt_path_offset(). These are primarily tests of the fdt_path_offset()
libfdt function itself, although dtc is used to generate a test file for
convenience.
Move these from the dtc tests section to the libfdt tests section
accordingly.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The -n option is not standard in POSIX, so convert to printf which should
work the same in every shell.
Signed-off-by: Mike Frysinger <vapier@chromium.org>
If you have a parent block with #size-cells improperly set to 0, and
then subsequently try to include a regs property in the child, dtc will
crash with SIGFPE while validating it. This patch fixes that crash,
instead printing the same invalid length warning that was causing it.
Test included.
Signed-off-by: Jack Miller <jack@codezen.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Paths with multiple '/' characters in a row (e.g. //somenode//somsubnode),
or trailing '/' characters (e.g. '/somenode/somesubnode/') should be
handled by fdt_path_offset(), and treated as equivalent to
/somenode/somesubnode.
Our current path_offset testcase doesn't check for these cases, so extend
it so it does.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This introduces a check_path_offset() helper function into the path_offset
testcase to simplify it. This will also make extending the test case with
tests for path_offset_namelen() and some edge cases easier.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch changes the dtc grammar to allow following syntax
i2cexp: &i2c2 {
...
};
Current device tree compiler allows to define multiple labels when defining
the device node the first time. Typically device nodes are defined in
DTSI files. Now these nodes can be overwritten for updating some of the
properties. Typically, device nodes are overridden in DTS files.
When working with adapter boards, most of the time adapter board can fit to
multiple base boards. But depending on which base board it is connected to,
the devices on the adapter board would be children of different devices.
e.g. On dra7-evm.dts, i2c2 is exported for expansion connector whereas
on dra72-evm.dts, i2c5 is exported for expansion connector.
This causes a problem when writing a generic device tree file for
the adapter board. Because, you cannot know whether all the devices on
adapter board are present on i2c or i2c5.
The problem can be solved by adding a common label (e.g. i2cexp) in both
of the DTS files when overriding the device nodes for i2c2 or i2c5.
This way, generic adapter board file would override the i2cexp. And
depending on which base board you use the adapter board, all the devices
are automatically added for correct device nodes.
Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
For example:
reserved-names="res1\0res2\0res3";
Where \0 is an actual embedded NUL in the source instead of a string
escape. To achieve this, use the len given by the lexer instead of
strlen.
Without this patch dtc will mangle the output and possibly hang on
realloc.
This has been there for ages, but the assertion makes no sense in the
context of the test immediately preceding it. This caused an abort()
when in -I dts -O dts mode with the right sort of internal labels in a
string property value.
Add a testcase for this and another candidate edge case (though this one
we already get right).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We can test fdtdump by comparing its output with the source file that was
compiled by dtc. Add a simple test that should at least catch regressions
in basic functionality.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch makes a small start on libfdt functions which actually help to
parse the contents of device trees, rather than purely manipulating the
tree's structure.
We add simple helpers to read and sanity check the #address-cells and
#size-cells values for a given node.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present, the lexer token for references to a path doesn't permit a
reference to the root node &{/}. Fixing the lexer exposes another bug
handling this case.
This patch fixes both bugs and adds testcases.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The sw_tree1 testcase has accumulated some valgrind errors, at least in
the "realloc" mode.
* It had both a realloc_fdt() and explicit xmalloc() for the initial
allocation which was redundant and caused errors.
* It doesn't make sense to call fdt_resize() until after we've created
the initial stub tree
* Alignment gaps inserted into the tree contain uninitialized data, which
trips an error when we write it out. We could zero the buffer, but that
would make it easier to miss real bugs, so we add suppressions for the
valgrind warnings instead.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This is a debugging convenience option, which makes it much easier to find
the failing tests and fix them one by one.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present, when using sequential write mode, there's no straightforward
means of resizing the buffer the fdt is being built into. This patch
adds an fdt_resize() function for this purpose.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
ePAPR 1.1 section 2.2.1.1 "Node Name Requirements" specifies that any
node that has a reg property must include a unit address in its name
with value matching the first entry in its reg property. Conversely, if
a node does not have a reg property, the node name must not include a
unit address.
Adjust all the dtc test-cases to conform to this rule.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Previously, the #line parsing regex ended with ({WS}+[0-9]+)?. The {WS}
could match line-break characters. If the #line directive did not contain
the optional flags field at the end, this could cause any integer data on
the next line to be consumed as part of the #line directive parsing. This
could cause syntax errors (i.e. #line parsing consuming the leading 0
from a hex literal 0x1234, leaving x1234 to be parsed as cell data,
which is a syntax error), or invalid compilation results (i.e. simply
consuming literal 1234 as part of the #line processing, thus removing it
from the cell data).
Fix this by replacing {WS} with [ \t] so that it can't match line-breaks.
Convert all instances of {WS}, even though the other instances should be
irrelevant for any well-formed #line directive. This is done for
consistency and ultimate safety.
Reported-by: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
If you try to insert a new node or extend a property with large value,
using fdtput you will notice that it always fails.
example:
fdtput -v -p -ts ./tst.dtb "/node-1" "property-1" "value-1
Error at 'node-1': FDT_ERR_NOSPACE
or
fdtput -v -c ./tst.dtb "/node-1"
Error at 'node-1': FDT_ERR_NOSPACE
or
fdtput -v -ts ./tst.dtb "/node" "property" "very big value"
Decoding value:
string: 'very big value'
Value size 15
Error at 'property': FDT_ERR_NOSPACE
All these error are returned from libfdt, as the size of the fdt passed
has no space to accomdate these new properties.
This patch adds realloc functions in fdtput to allocate new space in fdt
when it detects a shortage in space for new value or node. With this
patch, fdtput can insert a new node or property or extend a property
with new value greater than original size. Also it packs the final blob
to clean up any extra padding.
Without this patch fdtput tool complains with FDT_ERR_NOSPACE when we
try to add a node/property or extend the value of a property.
Testcases for the new behaviour added by David Gibson.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
There are a couple of fdtput related tests which are rather pointless -
they explicitly test for the presence of an undesirable limitation in
fdtput, which will cause test failures when we fix it. This patch removes
the tests.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We have certain tests which generate extremely long command lines, which
are shortened in the testsuite output with the 'shorten_echo' function.
Currently that is used in run_fdtput_test and run_wrap_test, this patch
uses it for run_wrap_test as well, allowing more general tests with long
command lines.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Iterating through subnodes with libfdt is a little painful to write as we
need something like this:
for (depth = 0, count = 0,
offset = fdt_next_node(fdt, parent_offset, &depth);
(offset >= 0) && (depth > 0);
offset = fdt_next_node(fdt, offset, &depth)) {
if (depth == 1) {
/* code body */
}
}
Using fdt_next_subnode() we can instead write this, which is shorter and
easier to get right:
for (offset = fdt_first_subnode(fdt, parent_offset);
offset >= 0;
offset = fdt_next_subnode(fdt, offset)) {
/* code body */
}
Also, it doesn't require two levels of indentation for the loop body.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
For a follow up commit, we want to be able to scan the buffer that was
returned to us. In order to do that safely, we need to know how big
the buffer actually is, so pass that back if requested.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit which changed the behaviour of this function broke one
of the tests. Also the comment should be updated to reflect its new
behaviour.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Not all /bin/echo implementations support the -e option. Instead, use
printf, which appears to be more widely available than /bin/echo -e.
See commit eaec1db "fdtget-runtest.sh: Fix failures when /bin/sh isn't
bash" for history.
I have tested this on Ubuntu 10.04 with /bin/sh pointing to both dash
and bash.
Reported-by: Mike Frysinger <vapier@gentoo.org> # and implemented-by
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
tests will need fdt type definitions provided in a subsequent patch
to libfdt_env.h. Since libfdt.h includes libfdt_env.h in the right
order anyway, just remove the fdt.h include.
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
The previous definition of for_each_*() would always include the very
first object within the list, irrespective of whether it was marked
deleted, since the deleted flag was not checked on the first object,
but only on any "next" object.
Fix for_each_*() to check the deleted flag in the loop body every
iteration to correct this.
Incidentally, this change is why commit 45013d8 dtc: "Add ability to
delete nodes and properties" only caused two "make checkm" failures;
only two tests actually use multiple labels on the same property or
node. With this current change applied, but commit 317a5d9 "dtc: zero
out new label objects" reverted, "make checkm" fails 29 times; i.e.
for every test that uses any labels at all.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Line control directives of the following formats are supported:
#line LINE "FILE"
# LINE "FILE" [FLAGS]
This allows dtc to consume the output of pre-processors, and to provide
error messages that refer to the original filename, including taking
into account any #include directives that the pre-processor may have
performed.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
The device tree language as currently defined conflicts with the C pre-
processor in one aspect - when a property or node name begins with a #
character, a pre-processor would attempt to interpret it as a directive,
fail, and most likely error out.
This change allows a property/node name to be prefixed with \. This
prevents a pre-processor from seeing # as the first non-whitespace
character on the line, and hence prevents the conflict. \ was previously
an illegal character in property/node names, so this change is
backwards compatible. The \ is stripped from the name during parsing
by dtc.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
dtc currently allows the contents of properties to be changed, and the
contents of nodes to be added to. There are situations where removing
properties or nodes may be useful. This change implements the following
syntax to do that:
/ {
/delete-property/ propname;
/delete-node/ nodename;
};
or:
/delete-node/ &noderef;
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This option mimics mkdir's -p option. It automatically creates nodes
as needed along the path provided. If the node already exists, no
error is given.
Signed-off-by: Simon Glass <sjg@chromium.org>
This option allows the creation of new nodes in a dtb file. The syntax
is:
fdtput -c <dtb_file> <node_path>
The node_path contains the path of the node to be created. All path
components up to the final one must exist already. The final one must
not exist already.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This patch adds -W and -E options to dtc which allow toggling on and off
of the various built in semantic checks on the tree.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When merging one device tree over the top of a previous tree, it is
possible to define a duplicate label that has the same name and points
to the same property or node. This is currently allowed by the duplicate
label checking code. However, alternative duplicate label checking
algorithms might not allow this. Add an explicit test to ensure this
capability is maintained.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
When compiling the current code-base with gcc 4.6.1, the following warning
is raised, which is interpreted as an error:
cc1: warnings being treated as errors
tests/setprop_inplace.c: In function ‘main’:
tests/setprop_inplace.c:62: error: format ‘%016llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘uint64_t’
tests/setprop_inplace.c:68: error: format ‘%016llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘uint64_t’
Use printf format specifiers from <inttypes.h> to solve this.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
The libfdt read/write functions are now usable enough that it's become a
moderately common pattern to use them to build and manipulate a device
tree from scratch. For example, we do so ourself in our rw_tree1 testcase,
and qemu is starting to use this model when building device trees for some
targets such as e500.
However, the read/write functions require some sort of valid tree to begin
with, so this necessitates either having a trivial canned dtb to begin with
or, more commonly, creating an empty tree using the serial-write functions
first.
This patch adds a helper function which uses the serial-write functions to
create a trivial, empty but complete and valid tree in a supplied buffer,
ready for manipulation with the read/write functions.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
In device trees in the world, properties consisting of a single 64-bit
integer are not as common as those consisting of a single 32-bit, cell
sized integer, but they're common enough that they're worth including
convenience functions for.
This patch adds helper wrappers of fdt_setprop_inplace(), fdt_setprop() and
fdt_appendprop() for handling 64-bit integer quantities in properties. For
better consistency with the names of these new *_u64() functions we also
add *_u32() functions as alternative names for the existing *_cell()
functions handling 32-bit integers.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The testcases based on test_tree1_dts0.dts were added purely to test dtc's
backwards compatibility handling of the old dts-v0 format. Since that
support has been removed, the dts has been updated to use the current
dts-v1 syntax, which makes the testcases pass, but be completely useless.
This patch removes the now obsolete testcases.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Several files were added, and should be in .gitignore. The *.test.dts
pattern should catch future source files which are generated by tests.
It also subsumes the old *.dtb.test.dts pattern.
Signed-off-by: Simon Glass <sjg@chromium.org>
Written by David Gibson <david@gibson.dropbear.id.au>. Additions by me:
* Ported to ToT dtc.
* Renamed cell to integer throughout.
* Implemented value range checks.
* Allow U/L/UL/LL/ULL suffix on literals.
* Enabled the commented test.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
On Ubuntu, /bin/sh is dash (at least by default), and dash's echo doesn't
accept the -e option. This means that fdtget-runtest.sh's EXPECT file will
contain "-e foo" rather than just "foo", which causes a test failure.
To work around this, run /bin/echo instead of (builtin) echo, which has
more chance of supporting the -e option.
Another possible fix is to change all the #! lines to /bin/bash rather
than /bin/sh, and change run_tests.sh to invoke sub-scripts using $SHELL
instead of just "sh". However, that would require bash specifically, which
may not be desirable.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
It is often inconvenient to place device tree files in the same directory
as their includes, or to specify the full path to include files.
An example of this is in U-Boot where we have a .dtsi file for each SOC
type, and this is included by the board .dts file. We need to either use
a mechanism like:
/include/ ARCH_CPU_DTS
with sed or cpp to perform the replacement with the correct path, or
we must specify the full path in the file:
/include/ "../../arch/arm/dts/tegra20.dtsi"
The first option is not desirable since it requires anyone compiling the
file to first pre-process it. The second is not desirable since it
introduces a path which is project-specific into a file which is supposed
to be a hardware description. For example Linux and U-Boot are unlikely to
put these include files in the same place.
It is much more convenient to specify the search patch on the command line
as is done with C pre-processors, for example.
Introduce a -i option to add to the list of search paths used to find
source and include files.
We cannot use -I as it is already in use. Other suggestions welcome.
Signed-off-by: Simon Glass <sjg@chromium.org>
Sometimes the requested node or property is not present in the device
tree. This option provides a way of reporting a default value in this
case, rather than halting with an error.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
There is a rather unfortunate bug in fdtget in that if multiple argument
sets are provided, it just repeats displaying the first set ones for
each set.
Fix this bug and add a test for it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Currently run_tests.sh generates several files of text test data. The
procedure it uses for this is somewhat torturous and has several problems:
* Since the test data is derived from a dts file, a cursory glance at the
test output suggests something is wrong with the processing of that dts.
This is misleading since in fact it's just being used as an arbirary
string.
* Since the base input has linefeeds removed, the head and sort commands
used later have no effect.
* Although an attempt is made to get rid of characters which the shell
will mangle, it's not thorough enough. Specifically it leaves in \ which
means that some string escapes found in the input data can get expanded
somewhere along the line in some shells.
This patch, therefore, replaces this generation of test data with a
pre-canned "Lorem ipsum" of approximately 2k. On my system, where /bin/sh
is dash, this fixes a test failure due to the aforementioned string
escapes being evaluated on one but not the other of the two comparison
paths (I haven't tracked down exactly where the expansion is happening).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently the fdt{get,put}-runtest.sh scripts invoke diff to check if
fdt{get,put} did the right thing. This isn't great though: it's not
obvious from the diff output which is the expected and which is the
actual result; diff's line by line behaviour is useless here, since all
the results are a single line and finally, when there is a difference
it always prints information even when the tests are supposed to be
running in quiet mode.
This patch uses cmp instead, and explicitly prints the expected results,
when running in verbose mode (the invocation of fdtget itself will have
already displayed the actual results in this mode.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch cleans up how the fdtget and fdtput tests are invoked.
Specifically we no longer hide the full command lines with a wrapper
function - this makes it possible to distinguish fdtget from similar
fdtput tests and makes it easier to work out how to manually invoke an
individual failing test.
In addition, we remove the testing for errors from the
fdt{get,put}-runtest.sh script, instead using an internal wrapper
analagous to run_wrap_test which can test for any program invocation
that's expected to return an error.
For a couple of the fdtput tests this would result in printing out
ludicrously large command lines. Therefore we introduce a new
mechanism to cut those down to something reasonable.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Several test scripts now have some code to check for a program returning
a signal, and reporting a suitable failure. This patch moves this
duplicated code into a helper function in tests.sh. At the same time we
remove a bashism found in the current copies (using the non portablr $[ ]
construct for arithmetic).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The patches introducing fdtget and fdtput inserted a peculiar bashism to
run_tests.sh using non-portable assignment within an (( )) expression.
This patch fixes it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Some of the test scripts create temporary files, which we remove at the
end. Except that we usually forgot to remove them on some exit paths. To
avoid this problem in future, this modifies the scripts to use the shell's
trap 0 functionality to automatically remove the temporaries on any exit.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Several of the test scripts remove $TMPFILE, without ever having set
the TMPFILE variable. This patch fixes it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We've add some test (generated) binaries that aren't currently listed in
.gitignore, in addition more scripts now generate various tmp.* files
during operation. This adds them all to .gitignore.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This simple utility allows writing of values into a device tree from the
command line. It aimes to be the opposite of fdtget.
What is it for:
- Updating fdt values when a binary blob already exists
(even though source may be available it might be easier to use this
utility rather than sed, etc.)
- Writing machine-specific fdt values within a build system
To use it, specify the fdt binary file on command line followed by the node
and property to set. Then, provide a list of values to put into that
property. Often there will be just one, but fdtput also supports arrays and
string lists.
fdtput does not try to guess the type of the property based on looking at
the arguments. Instead it always assumes that an integer is provided. To
indicate that you want to write a string, use -ts. You can also provide
hex values with -tx.
The command line arguments are joined together into a single value. For
strings, a nul terminator is placed between each string when it is packed
into the property. To avoid this, pass the string as a single argument.
Usage:
fdtput <options> <dt file> <<node> <property> [<value>...]
Options:
-t <type> Type of data
-v Verbose: display each value decoded from command line
-h Print this help
<type> s=string, i=int, u=unsigned, x=hex
Optional modifier prefix:
hh or b=byte, h=2 byte, l=4 byte (default)
To read from stdin and write to stdout, use - as the file. So you can do:
cat somefile.dtb | fdtput -ts - /node prop "My string value" > newfile.dtb
This commit also adds basic tests to verify the major features.
Signed-off-by: Simon Glass <sjg@chromium.org>
This simply utility makes it easy for scripts to read values from the device
tree. It is written in C and uses the same libfdt as the rest of the dtc
package.
What is it for:
- Reading fdt values from scripts
- Extracting fdt information within build systems
- Looking at particular values without having to dump the entire tree
To use it, specify the fdt binary file on command line followed by a list of
node, property pairs. The utility then looks up each node, finds the property
and displays the value.
Each value is printed on a new line.
fdtget tries to guess the type of each property based on its contents. This
is not always reliable, so you can use the -t option to force fdtget to decode
the value as a string, or byte, etc.
To read from stdin, use - as the file.
Usage:
fdtget <options> <dt file> [<node> <property>]...
Options:
-t <type> Type of data
-h Print this help
<type> s=string, i=int, u=unsigned, x=hex
Optional modifier prefix:
hh or b=byte, h=2 byte, l=4 byte (default)
Signed-off-by: Simon Glass <sjg@chromium.org>
This will allow callers to rebuild .dtb files when any of the /include/d
.dtsi files are modified, not just the top-level .dts file.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Commit a31e3ef83b introduced new libfdt
functions to append to existing properties. It also included a test case
for this, but neglected to update the Makefile and run_tests.sh script
to actually build and execute this testcase.
This patch corrects the oversight.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Some properties may contain multiple values, these values may need
to be added to the property respectively. this patch provides this
functionality. The main purpose of fdt_append_prop() is to append
the values to a existing property, or create a new property if it
dose not exist.
Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Elements of size 8, 16, 32, and 64 bits are supported. The new
/bits/ syntax was selected so as to not pollute the reserved
keyword space with uint8/uint16/... type names.
With this patch the following property assignment:
property = /bits/ 16 <0x1234 0x5678 0x0 0xffff>;
is equivalent to:
property = <0x12345678 0x0000ffff>;
It is now also possible to directly specify a 64 bit literal in a
cell list, also known as an array using:
property = /bits/ 64 <0xdeadbeef00000000>;
It is an error to attempt to store a literal into an element that is
too small to hold the literal, and the compiler will generate an
error when it detects this. For instance:
property = /bits/ 8 <256>;
Will fail to compile. It is also an error to attempt to place a
reference in a non 32-bit element.
The documentation has been changed to reflect that the cell list
is now an array of elements that can be of sizes other than the
default 32-bit cell size.
The sized_cells test tests the creation and access of 8, 16, 32,
and 64-bit sized elements. It also tests that the creation of two
properties, one with 16 bit elements and one with 32 bit elements
result in the same property contents.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
The load_blob() and save_blob() functions are very similar to the utilfdt
versions. This removes the duplicated code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This adds higher-level libfdt operations for reading/writing an fdt
blob from/to a file, as well as a function to decode a data type string
as will be used by fdtget, fdtput.
This also adds a few tests for the simple type argument supported by
utilfdt_decode_type.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
With this patch the following property assignment:
property = <0x12345678 'a' '\r' 100>;
is equivalent to:
property = <0x12345678 0x00000061 0x0000000D 0x00000064>
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
A number of the dtc testcases trigger the new "variable set but not
used" warning from gcc 4.6. That is they have variables which are
assigned, but then never read after that point.
In a couple of cases this is just because the variables aren't needed,
so this patch removes them. In subnode_offset.c, it's because one
pair of variables we clearly intended to test we don't actually test.
This patch also adds this missing check.
This patch makes the testsuite compile clean with gcc 4.6.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch adds a "dtdiff" script to do a useful form diff of two
device trees. This automatically converts the tree to dts form (if
it's not already) and uses a new "-s" option in dtc to "sort" the
tree. That is, it sorts the reserve entries, it sorts the properties
within each node by name, and it sorts nodes by name within their
parent.
This gives a pretty sensible diff between the trees, which will ignore
semantically null internal rearrangements (directly diffing the dts
files can give a lot of noise due to the order changes).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When nodes are modified by merging device trees, nodes to be updated/merged can
be specified by a label. Specifying nodes by full path (instead of label)
doesn't quite work. This patch fixes that.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Current we check for various error codes with [ $x == "NN" ]. However
'==' is not actually a correct operator for the [ (test) command. It
should be either '=' for string comparison or '-eq' for integer
comparison. It appears that the bash builtin version of test
implements '==' though, so we were getting away with it, as long as
/bin/sh was bash - or the testsuite generated no errors.
This patch fixes the usage of test so that it should work on non-bash
shells.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The dtbs_equal_ordered test program is used to implement a number of
testcases. However, the test program itself has never been
particularly well tested. In addition there are testcases coming in
future for which it would be useful to have a corresponding
"dtbs_equal_unordered" which checks for equality of device trees, not
considering the internal ordering of elements. Finally, for some
tests we may want it would be useful to check trees for equality with
the PASS case being when they are *not* equal.
This patch addresses all of the above. A dtbs_equal_unordered is
added, and both it and the existing dtbs_equal_ordered program now
take a -n option to make the PASS case be where the trees are not
equal. A number of example trees with slight modifications from
test_tree1 are used to verify that both these programs correctly
identify when the tree is altered, and a dtb_reverse program is used
to verify that the unordered version does not depend on internal
ordering. These new testcases for the equality testing programs are
split out into a new test group in run_tests.sh.
dtbs_equal_unordered uses the new property iteration functions, and so
this also acts as further testing for those functions.
dtbs_equal_unordered will be useful for further testing the recently
added tree-merging code and its upcoming extensions.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch turns on a bunch of extra gcc warnings, most of which are
probably a good idea. Of the new warnings -Wnested-externs and
-Wstrict-prototypes need no code changes, we're already warning-clean.
The remaining one, -Wmissing-prototypes requires trivial changes in
some of the tests (making functions local).
This patch also rearranges the warnings flags into a separate make
variable for convenience, and turns on -Werror, to really encourage
people to keep the code warning-clean.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch allows the following construct:
/ {
property-a = "old";
property-b = "does not change";
};
/ {
property-a = "changed";
property-c = "new";
node-a {
};
};
Where the later device tree overrides the properties found in the
earlier tree. This is useful for laying down a template device tree
in an include file and modifying it for a specific board without having
to clone the entire tree.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
The somewhat embarrasing bug in the first version of my previous patch
would have been detected by valgrind. Thus reminded, I've run the
testsuite under valgrind and fixed any errors I found. This turned
out to be just some uninitialized buffers in test programs. The
fragments of uninitialized data aren't particularly important, but we
might as well squash the valgrind warnings, so that future valgrind
errors will stand out.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present, both the grammar and our internal data structures mean
that there can be only one label on a node or property. This is a
fairly arbitrary constraint, given that any number of value labels can
appear at the same point, and that in C you can have any number of
labels on the same statement.
This is pretty much a non-issue now, but it may become important with
some of the extensions that Grant and I have in mind. It's not that
hard to change, so this patch does so, allowing an arbitrary number of
labels on any given node or property. As usual a testcase is added
too.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
The only purpose of the dtc_references_dts0 testcase was to check
handling of references in the old dts v0 syntax. Since we no longer
support the old syntax, and the references_dts0.dts has been converted
to the new format, it's entirely redundant. This patch removes it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, nothing will stop you from re-using the same label string
multiple times in a dts, e.g.:
/ {
samelabel: prop1 = "foo";
samelabel: prop2 = "bar";
};
or
/ {
samelabel: prop1 = "foo";
samelabel: subnode {
};
};
When using node references by label, this could lead to confusing
results (with no warning), and in -Oasm mode will result in output
which the assembler will complain about (since it too will have
duplicate labels).
This patch, therefore, adds code to checks.c to give errors if you
attempt to re-use the same label. It treats all labels (node,
property, and value) as residing in the same namespace, since the
assembler will treat them so for -Oasm mode.
Testcases for the new code are also added.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, when in -Idts -Odtb or -Ifs -Odtb modes, dtc always
defaults to using 0 as the value for the boot_cpuid_phys header field.
That's correct quite often, but there are some systems where there is
no CPU with hardware ID of 0, or where we don't want to use the CPU
with hardware ID 0 at all (e.g. for AMP-style partitioning). The only
way to override this default currently, is with the -b command line
option.
This patch improves dtc to instead base the default boot_cpuid_phys
value on the reg property of the first listed subnode of /cpus. This
means that dtc will get boot_cpuid_phys correct by default in a
greater proportion of cases (since the boot cpu is usually listed
first, and this way at least the boot_cpuid_phys default will match
some existing cpu node). If the node doesn't exist or has an invalid
'reg' property (missing or not 4 bytes in length), then
boot_cpuid_phys is set to 0.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, the Linux kernel, libfdt and dtc, when using flattened
device trees encode a node's phandle into a property named
"linux,phandle". The ePAPR specification, however - aiming as it is
to not be a Linux specific spec - requires that phandles be encoded in
a property named simply "phandle".
This patch adds support for this newer approach to dtc and libfdt.
Specifically:
- fdt_get_phandle() will now return the correct phandle if it
is supplied in either of these properties
- fdt_node_offset_by_phandle() will correctly find a node with
the given phandle encoded in either property.
- By default, when auto-generating phandles, dtc will encode
it into both properties for maximum compatibility. A new -H
option allows either only old-style or only new-style
properties to be generated.
- If phandle properties are explicitly supplied in the dts
file, dtc will not auto-generate ones in the alternate format.
- If both properties are supplied, dtc will check that they
have the same value.
- Some existing testcases are updated to use a mix of old and
new-style phandles, partially testing the changes.
- A new phandle_format test further tests the libfdt support,
and the -H option.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
I've just tested building dtc as an x86_64 binary on a 32-bit i386
host by using:
make CC="gcc -m64"
This patch fixes a handful of minor bugs thus discovered:
* There is a printf() type mismatch on 64-bit in value-labels.c
* For the tests which use libdl, we were using the GNU make feature
where it will find libdl.so given a dependency in the form '-ldl'.
But this built-in make logic doesn't know we're compiling 64-bit so
finds the 32-bit version of the library. We avoid using this and
instead explicitly pass -ldl to CC, which being the 64-bit version
does know where to look.
* To process dtc's asm output into .so files, run_tests.sh was
directly invoking the (default instance of) the assembler and linker.
Instead invoke these via the CC driver, and allow that to be overriden
from the make environment.
* The x86_64 assembler doesn't 0 fill with the .balign directive
(presumably it is NOP filling). That doesn't produce strictly
incorrect trees, but it is confusing and confounds are testcases which
do byte-by-byte comparison of the trees produced by asm output with
direct dtb output (which does 0 pad where necessary, of course). This
patch uses the optional second argument to .balign to force gas to
zero-fill instead.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
In one section, the run_tests script attempts to use the -e (interpret
escapes) option to echo. This option is not portable - for example
the echo built into dash, now the default /bin/sh on several
distributions does not support it and will just echo "-e" literally.
Since we don't actually use any of the escapes that -e enables, this
patch simply removes it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When in -Odts mode, dtc will not produce correct output for
string-like properties which have more than one \0 character at the
end of the property's bytestring. In fact, it generates output which
is not syntactically correct. This patch fixes the bug, and adds a
testcase for future regressions here.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
David Gibson