tree 08a984591270e574bcda8c2cd28bd4c6351c7b46
parent 6d014adfa2ac4b1151d2b80a6943f59c3e254239
author Wolfgang Denk <wd@denx.de> 1279995722 +0200
committer Wolfgang Denk <wd@denx.de> 1284917388 +0200

Make getenv() work before relocation.

So far, getenv() would work before relocation is most cases, even
though it was not intended to be used that way.  When switching to a
hash table based implementation, this would break a number of boards.

For convenience, we make getenv() check if it's running before
relocation and, if so, use getenv_f() internally.

Note that this is limited to simple cases, as we use a small static
buffer (32 bytes) in the global data for this purpose.

For this reason, it is also not a good idea to convert all current
uses of getenv_f() into getenv() - some of the existing use cases need
to be able to deal with longer variable values, so getenv_f() is still
needed and recommended for use before relocation.

Signed-off-by: Wolfgang Denk <wd@denx.de>