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-rw-r--r--doc/README.falcon9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/README.falcon b/doc/README.falcon
index 6357b1e..bccf6c9 100644
--- a/doc/README.falcon
+++ b/doc/README.falcon
@@ -80,6 +80,15 @@ spl_start_uboot() : required
Returns "0" if SPL should start the kernel, "1" if U-Boot
must be started.
+Environment variables
+---------------------
+
+A board may chose to look at the environment for decisions about falcon
+mode. In this case the following variables may be supported:
+
+boot_os : Set to yes/Yes/true/True/1 to enable booting to OS,
+ any other value to fall back to U-Boot (including
+ unset)
Using spl command
-----------------