"Schwarz,Andre" andre.schwarz@matrix-vision.de wrote on 2010/10/24 22:33:44:
Wolfgang,
Wolfgang Denk wd@denx.de hat am 24. Oktober 2010 um 22:18 geschrieben:
Dear "Schwarz,Andre",
In message 1702240919.111.1287950899754.JavaMail.open-xchange@proteus you wrote:
Since I assume Wolfgang won't accept a board specific "add 4 nops after _start"-patch I'd like to solve this without trial and error.
To the best of my knowledge no board made use f this "warmboot" entry point. OK, I wasn't aware that Jocke obviously did something lioke this, so there might be other boards as well - but it's unlikely.
Of course digging into this is beyond my knowledge and any help would be appreciated. I simply can't think of being the only one having this issue...
Check how your board implements the "reset" command - I cannot see any specific code for that in your sources, so it looks mostly harmless to me.
this is what I don't understand :
The broken boards are *dead*, i.e. no single character on the serial line. To me this means even the initial code running from flash isn't executed properly. IMHO this doesn't look like something like a problem after relocation ... it's something more fundamental.
Yes, like something is wrong with the reset code.
The boards in question are using low boot, i.e. reset vector @ 0x100.
Me too.
There's normal power-on-reset sequencing and no such thing like a reboot or "warm" reset.
Without that patch the boards are running fine.
I can see no obvious difference between working and broken boards.
I'd be happy to hear that the error is caused by something hidden within board specific code.
You still haven't reported weather the 4 nop's helped or not, yet you seek my help. I am just going to ignore you until you do test it.
Jocke