multicast tftp: RFC2090

[platform/kernel/u-boot.git] / README

diff --git a/README b/README
index 6af6aaa..291b304 100644 (file)
--- a/README
+++ b/README
@@ -1066,6 +1066,16 @@ The following options need to be configured:
                Defines a default value for theIP address of a TFTP
                server to contact when using the "tftboot" command.
 
+- Multicast TFTP Mode:
+               CONFIG_MCAST_TFTP
+
+               Defines whether you want to support multicast TFTP as per
+               rfc-2090; for example to work with atftp.  Lets lots of targets
+               tftp down the same boot image concurrently.  Note: the ethernet
+               driver in use must provide a function: mcast() to join/leave a
+               multicast group.
+
+               CONFIG_BOOTP_RANDOM_DELAY
 - BOOTP Recovery Mode:
                CONFIG_BOOTP_RANDOM_DELAY