X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=README;h=197804e354e1bb36268f7fa56780141b3ecd0714;hb=f2443d10ff3d4b0e3c3eb68ce43d7f26468a1b00;hp=f997a5d8605e91ff085da24eeaceac926cf9f194;hpb=bfc7bea6adc46e1db2f5a5e3464d7652ed67c864;p=u-boot

diff --git a/README b/README
index f997a5d860..197804e354 100644
--- a/README
+++ b/README
@@ -2534,18 +2534,32 @@ to save the current settings.
 	- CONFIG_ENV_SIZE:
 
 	  These two #defines specify the offset and size of the environment
-	  area within the first NAND device.
+	  area within the first NAND device.  CONFIG_ENV_OFFSET must be
+	  aligned to an erase block boundary.
 
-	- CONFIG_ENV_OFFSET_REDUND
+	- CONFIG_ENV_OFFSET_REDUND (optional):
 
 	  This setting describes a second storage area of CONFIG_ENV_SIZE
-	  size used to hold a redundant copy of the environment data,
-	  so that there is a valid backup copy in case there is a
-	  power failure during a "saveenv" operation.
-
-	Note: CONFIG_ENV_OFFSET and CONFIG_ENV_OFFSET_REDUND must be aligned
-	to a block boundary, and CONFIG_ENV_SIZE must be a multiple of
-	the NAND devices block size.
+	  size used to hold a redundant copy of the environment data, so
+	  that there is a valid backup copy in case there is a power failure
+	  during a "saveenv" operation.  CONFIG_ENV_OFFSET_RENDUND must be
+	  aligned to an erase block boundary.
+
+	- CONFIG_ENV_RANGE (optional):
+
+	  Specifies the length of the region in which the environment
+	  can be written.  This should be a multiple of the NAND device's
+	  block size.  Specifying a range with more erase blocks than
+	  are needed to hold CONFIG_ENV_SIZE allows bad blocks within
+	  the range to be avoided.
+
+	- CONFIG_ENV_OFFSET_OOB (optional):
+
+	  Enables support for dynamically retrieving the offset of the
+	  environment from block zero's out-of-band data.  The
+	  "nand env.oob" command can be used to record this offset.
+	  Currently, CONFIG_ENV_OFFSET_REDUND is not supported when
+	  using CONFIG_ENV_OFFSET_OOB.
 
 - CONFIG_NAND_ENV_DST