Some PHY like Intel LXT971A need extra delay after
command issued before MII status register can be read
-- IP address:
- CONFIG_IPADDR
-
- Define a default value for the IP address to use for
- the default Ethernet interface, in case this is not
- determined through e.g. bootp.
- (Environment variable "ipaddr")
-
-- Server IP address:
- CONFIG_SERVERIP
-
- Defines a default value for the IP address of a TFTP
- server to contact when using the "tftboot" command.
- (Environment variable "serverip")
-
-- Gateway IP address:
- CONFIG_GATEWAYIP
-
- Defines a default value for the IP address of the
- default router where packets to other networks are
- sent to.
- (Environment variable "gatewayip")
-
-- Subnet mask:
- CONFIG_NETMASK
-
- Defines a default value for the subnet mask (or
- routing prefix) which is used to determine if an IP
- address belongs to the local subnet or needs to be
- forwarded through a router.
- (Environment variable "netmask")
-
- BOOTP Recovery Mode:
CONFIG_BOOTP_RANDOM_DELAY
- CONFIG_SYS_FLASH_USE_BUFFER_WRITE
Use buffered writes to flash.
-- CONFIG_FLASH_SPANSION_S29WS_N
- s29ws-n MirrorBit flash has non-standard addresses for buffered
- write commands.
-
-- CONFIG_FLASH_SHOW_PROGRESS
- If defined (must be an integer), print out countdown
- digits and dots. Recommended value: 45 (9..1) for 80
- column displays, 15 (3..1) for 40 column displays.
-
-- CONFIG_FLASH_VERIFY
- If defined, the content of the flash (destination) is compared
- against the source after the write operation. An error message
- will be printed when the contents are not identical.
- Please note that this option is useless in nearly all cases,
- since such flash programming errors usually are detected earlier
- while unprotecting/erasing/programming. Please only enable
- this option if you really know what you are doing.
-
- CONFIG_ENV_FLAGS_LIST_DEFAULT
- CONFIG_ENV_FLAGS_LIST_STATIC
Enable validation of the values given to environment variables when
of environment data (variable area); in general, we support the
following configurations:
-- CONFIG_BUILD_ENVCRC:
-
- Builds up envcrc with the target environment so that external utils
- may easily extract it and embed it in final U-Boot images.
-
BE CAREFUL! The first access to the environment happens quite early
in U-Boot initialization (when we try to get the setting of for the
console baudrate). You *MUST* have mapped your NVRAM area then, or