Merge branch 'master' of git://git.denx.de/u-boot-arm

[oweals/u-boot.git] / README

diff --git a/README b/README
index 7b27c992e3d821067596770f8b40ddcaa9d97f5c..3239985416dd72f38ff5d9c06e733327fb7df9eb 100644 (file)
--- a/README
+++ b/README
@@ -3315,6 +3315,15 @@ List of environment variables (most likely not complete):
                  This can be used to load and uncompress arbitrary
                  data.
 
+  fdt_high     - if set this restricts the maximum address that the
+                 flattened device tree will be copied into upon boot.
+                 If this is set to the special value 0xFFFFFFFF then
+                 the fdt will not be copied at all on boot.  For this
+                 to work it must reside in writable memory, have
+                 sufficient padding on the end of it for u-boot to
+                 add the information it needs into it, and the memory
+                 must be accessible by the kernel.
+
   i2cfast      - (PPC405GP|PPC405EP only)
                  if set to 'y' configures Linux I2C driver for fast
                  mode (400kHZ). This environment variable is used in