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authorMarkus Klotzbuecher <mk@denx.de>2006-03-20 18:02:44 +0100
committerMarkus Klotzbücher <mk@pollux.denx.de>2006-03-20 18:02:44 +0100
commite443c944cf4050daffb46d4788446d6c2df8ac6c (patch)
tree0eef771495be3fe6ad5013c4044bfcebe584c0f2 /README
parent5536b2b5a932410a58e65ead9215af3836c8e9e0 (diff)
Support for redundant environment in NAND Flash.
Diffstat (limited to 'README')
-rw-r--r--README11
1 files changed, 11 insertions, 0 deletions
diff --git a/README b/README
index 6f610082224..44421497bee 100644
--- a/README
+++ b/README
@@ -1946,6 +1946,17 @@ to save the current settings.
These two #defines specify the offset and size of the environment
area within the first NAND device.
+ - CFG_ENV_OFFSET_REDUND
+
+ This setting describes a second storage area of CFG_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: CFG_ENV_OFFSET and CFG_ENV_OFFSET_REDUND must be aligned
+ to a block boundary, and CFG_ENV_SIZE must be a multiple of
+ the NAND devices block size.
+
- CFG_SPI_INIT_OFFSET
Defines offset to the initial SPI buffer area in DPRAM. The