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| author | Simon Glass <sjg@chromium.org> | 2015-06-23 15:38:31 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-07-21 17:39:21 -0600 |
| commit | c9689ca3182b89f1051b11eac2296a627abd4d31 (patch) | |
| tree | e15a18816eac5fb476a41696c440af54c31f3414 | |
| parent | 4eae498e68a3a6bdd8b18a8cb9191196e8843740 (diff) | |
| download | u-boot-imx-c9689ca3182b89f1051b11eac2296a627abd4d31.zip u-boot-imx-c9689ca3182b89f1051b11eac2296a627abd4d31.tar.gz u-boot-imx-c9689ca3182b89f1051b11eac2296a627abd4d31.tar.bz2 | |
Add a way of checking the position of a structure member
U-Boot uses structures for hardware access so it is important that these
structures are correct. Add a way of asserting that a structure member is
at a particular offset. This can be created using the datasheet for the
hardware.
This implementation uses Static_assert() since BUILD_BUG_ON() only works
within functions.
Signed-off-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | include/common.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h index 8f4b2ec..4566bd1 100644 --- a/include/common.h +++ b/include/common.h @@ -1010,6 +1010,17 @@ int cpu_release(int nr, int argc, char * const argv[]); #define DEFINE_CACHE_ALIGN_BUFFER(type, name, size) \ DEFINE_ALIGN_BUFFER(type, name, size, ARCH_DMA_MINALIGN) +/* + * check_member() - Check the offset of a structure member + * + * @structure: Name of structure (e.g. global_data) + * @member: Name of member (e.g. baudrate) + * @offset: Expected offset in bytes + */ +#define check_member(structure, member, offset) _Static_assert( \ + offsetof(struct structure, member) == offset, \ + "`struct " #structure "` offset for `" #member "` is not " #offset) + /* Pull in stuff for the build system */ #ifdef DO_DEPS_ONLY # include <environment.h> |