For Blackfin, C symbols are prefixed with '_'.

If CONFIG_CMD_MAGICVAR is enabled for Blackfin, the following error occurs:

commands/built-in.o: In function `do_magicvar':
commands/magicvar.c:(.text+0x3326): undefined reference to `__barebox_magicvar_start'
commands/magicvar.c:(.text+0x332a): undefined reference to `__barebox_magicvar_end'
commands/magicvar.c:(.text+0x332e): undefined reference to `__barebox_magicvar_start'
commands/magicvar.c:(.text+0x3332): undefined reference to `__barebox_magicvar_end'
make: *** [barebox] Error 1

Add '_' to __barebox_magicvar_start and __barebox_magicvar_end,
like the other symbols in this linker script.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add barebox-data section in arm branch to get complete
barebox regions in sdram regions tree.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

As done in the Linux Kernel

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The magicvar command gives an overview about all environment variables
with a special meaning.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

this will allow each arch to handle the boards more simply and depending on
there need

the env var BOARD will refer to the current board dirent

for sandbox as we have only one board the board dirent is arch/sandbox/board

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>