powerpc/corenet_ds: Slave reads ENV from master when boot from SRIO

[karo-tx-uboot.git] / README

diff --git a/README b/README
index da15105617eb0a6ad58f906d087e9f8ab6a0d148..a0536a4b597870d936d9b27a6b9b2d1fb6a43f1d 100644 (file)
--- a/README
+++ b/README
@@ -3026,6 +3026,24 @@ to save the current settings.
          environment area within the total memory of your DataFlash placed
          at the specified address.
 
+- CONFIG_ENV_IS_IN_REMOTE:
+
+       Define this if you have a remote memory space which you
+       want to use for the local device's environment.
+
+       - CONFIG_ENV_ADDR:
+       - CONFIG_ENV_SIZE:
+
+         These two #defines specify the address and size of the
+         environment area within the remote memory space. The
+         local device can get the environment from remote memory
+         space by SRIO or other links.
+
+BE CAREFUL! For some special cases, the local device can not use
+"saveenv" command. For example, the local device will get the
+environment stored in a remote NOR flash by SRIO link, but it can
+not erase, write this NOR flash by SRIO interface.
+
 - CONFIG_ENV_IS_IN_NAND:
 
        Define this if you have a NAND device which you want to use