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-rw-r--r--docs/porting-guide.md11
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/porting-guide.md b/docs/porting-guide.md
index 0189ec40..4d7a5ead 100644
--- a/docs/porting-guide.md
+++ b/docs/porting-guide.md
@@ -535,6 +535,17 @@ optionally be defined:
PLAT_PARTITION_MAX_ENTRIES := 12
$(eval $(call add_define,PLAT_PARTITION_MAX_ENTRIES))
+The following constant is optional. It should be defined to override the default
+behaviour of the `assert()` function (for example, to save memory).
+
+* **PLAT_LOG_LEVEL_ASSERT**
+ If `PLAT_LOG_LEVEL_ASSERT` is higher or equal than `LOG_LEVEL_VERBOSE`,
+ `assert()` prints the name of the file, the line number and the asserted
+ expression. Else if it is higher than `LOG_LEVEL_INFO`, it prints the file
+ name and the line number. Else if it is lower than `LOG_LEVEL_INFO`, it
+ doesn't print anything to the console. If `PLAT_LOG_LEVEL_ASSERT` isn't
+ defined, it defaults to `LOG_LEVEL`.
+
### File : plat_macros.S [mandatory]