[U-Boot-Users] [PATCH] 83xx: Put the version (and magic) after the HRCW.
Jerry Van Baren
gerald.vanbaren at comcast.net
Fri Dec 8 03:49:57 CET 2006
Jerry Van Baren wrote:
> Sam Song wrote:
>> Jerry Van Baren <gerald.vanbaren at comcast.net> wrote:
>>> Put the version (and magic) after the HRCW. This
>>> puts it in a fixed location in flash, not at the
>>> of flash but as close as we can get.
>> Nice effort. Space saving and better version check.
>> I guess the same change could apply for MPC8260/47/8.
> Yes. Most boards have the version in the first bytes of flash, but this
> was not possible on the 82xx because of the HRCW, so it was put in
> .data. This set up was copied for the 83xx (which also has a HRCW). My
> change moves it back to .text just after the HRCW. I put also the
> u-boot magic number back in in honor of Wolfgang. ;-)
> If you change the file names in the patch, it probably would apply. :-)
> I intend to do this (perhaps literally), but ran out of ambition tonight.
> Best regards,
Arrgh, I forgot about the 8260 master + 7 slaves mode, which fills the
first 256 bytes with HRCWs. As a result, we cannot put the magic number
and version at offset 0x40 like I did with the 8360 (well, we could do
it, but only if the system doesn't have slaves). We could, however, put
the magic number and version in a different vector area that has room
(e.g. offset 0x240).
What we have works and has worked for several years. I don't have
enough ambition and interest at this point to change this for the mpc8260.
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