mirror of https://gitlab.com/qemu-project/dtc.git
e3b32b75b5
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> |
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| Documentation | ||
| libfdt | ||
| scripts | ||
| tests | ||
| .gitignore | ||
| GPL | ||
| Makefile | ||
| Makefile.convert-dtsv0 | ||
| Makefile.dtc | ||
| Makefile.ftdump | ||
| README.license | ||
| TODO | ||
| checks.c | ||
| convert-dtsv0-lexer.l | ||
| data.c | ||
| dtc-lexer.l | ||
| dtc-parser.y | ||
| dtc.c | ||
| dtc.h | ||
| flattree.c | ||
| fstree.c | ||
| ftdump.c | ||
| livetree.c | ||
| srcpos.c | ||
| srcpos.h | ||
| treesource.c | ||
| util.c | ||
| util.h | ||
README.license
Licensing and contribution policy of dtc and libfdt =================================================== This dtc package contains two pieces of software: dtc itself, and libfdt which comprises the files in the libfdt/ subdirectory. These two pieces of software, although closely related, are quite distinct. dtc does not incoporate or rely on libfdt for its operation, nor vice versa. It is important that these two pieces of software have different license conditions. As the copyright banners in each source file attest, dtc is licensed under the GNU GPL. The full text of the GPL can be found in the file entitled 'GPL' which should be included in this package. dtc code, therefore, may not be incorporated into works which do not have a GPL compatible license. libfdt, however, is GPL/BSD dual-licensed. That is, it may be used either under the terms of the GPL, or under the terms of the 2-clause BSD license (aka the ISC license). The full terms of that license are given in the copyright banners of each of the libfdt source files. This is, in practice, equivalent to being BSD licensed, since the terms of the BSD license are strictly more permissive than the GPL. I made the decision to license libfdt in this way because I want to encourage widespread and correct usage of flattened device trees, including by proprietary or otherwise GPL-incompatible firmware or tools. Allowing libfdt to be used under the terms of the BSD license makes that it easier for vendors or authors of such software to do so. This does mean that libfdt code could be "stolen" - say, included in a proprietary fimware and extended without contributing those extensions back to the libfdt mainline. While I hope that doesn't happen, I believe the goal of allowing libfdt to be widely used is more important than avoiding that. libfdt is quite small, and hardly rocket science; so the incentive for such impolite behaviour is small, and the inconvenience caused therby is not dire. Licenses such as the LGPL which would allow code to be used in non-GPL software, but also require contributions to be returned were considered. However, libfdt is designed to be used in firmwares and other environments with unusual technical constraints. It's difficult to anticipate all possible changes which might be needed to meld libfdt into such environments and so difficult to suitably word a license that puts the boundary between what is and isn't permitted in the intended place. Again, I judged encouraging widespread use of libfdt by keeping the license terms simple and familiar to be the more important goal. **IMPORTANT** It's intended that all of libfdt as released remain permissively licensed this way. Therefore only contributions which are released under these terms can be merged into the libfdt mainline. David Gibson <david@gibson.dropbear.id.au> (principal original author of dtc and libfdt) 2 November 2007