mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
60 lines
2.3 KiB
Text
60 lines
2.3 KiB
Text
|
|
||
|
|
|
||
|
|
First, some build notes on the Silicon Turnkey eXpress XTc.
|
||
|
|
|
||
|
|
This board has both 87x/88x procesor options at various
|
||
|
|
frequencies. The configuration file has some macros for setting
|
||
|
|
the clock speed, not all have been tested. They all have
|
||
|
|
a 10MHz input clock. Please do not check in a configuration
|
||
|
|
file that selects a high speed not available on all processors.
|
||
|
|
We chose the 66MHz core and bus speed, which should be OK on
|
||
|
|
all boards. If you have a processor, lucky you! :-)
|
||
|
|
Just build a new configuration with that speed, check
|
||
|
|
the macro configuration to ensure it's correct. If the
|
||
|
|
macro is updated, please check that in, but keep default
|
||
|
|
processor speed.
|
||
|
|
|
||
|
|
The board is likely to have more than 1Mbyte of NOR boot flash.
|
||
|
|
It was also configured with a high boot vector (Dan's fault)
|
||
|
|
so the standard 8xx mapping doesn't work well. We had to move
|
||
|
|
the addresses around a little bit so one copy would work. The
|
||
|
|
flash got fragmented, and we are working on a better solution.
|
||
|
|
There is an "xtc.cfg" floating around for the BDI2000, use
|
||
|
|
that for programming a new version of U-Boot. You can probably
|
||
|
|
find it on the Silicon Turnkey eXpress (www.silicontkx.com),
|
||
|
|
Embedded Alley Solutions (embeddedalley.com), or Denx (denx.de)
|
||
|
|
servers.
|
||
|
|
|
||
|
|
The board will also have various SDRAM sizes, but the code
|
||
|
|
should automatically determine the amount of memory.
|
||
|
|
|
||
|
|
There are a couple of different board versions, visually
|
||
|
|
they use different BGA or surface mount memory parts. However,
|
||
|
|
they are logically the same board.
|
||
|
|
|
||
|
|
Now, some operational notes.
|
||
|
|
|
||
|
|
The board has the option of sporting two FEC Ethernet ports.
|
||
|
|
The second port isn't configured to be automatically available
|
||
|
|
because it would cause U-Boot to generate a board data structure
|
||
|
|
(the bd_t) with multiple MAC addresses and be incompatible with
|
||
|
|
standard 8xx kernel builds. You can use/test the second FEC
|
||
|
|
in U-Boot by assigning an 'eth1addr' and selecting the second
|
||
|
|
FEC as the port to use.
|
||
|
|
|
||
|
|
Since this is just a development board and not a product, STx
|
||
|
|
does not assign unique MAC addresses. We just pilfer the
|
||
|
|
"default" ones used by Wolfgang on some other boards. Please
|
||
|
|
ensure you assign unique MAC addresses when using these boards.
|
||
|
|
|
||
|
|
The serial port baud rate is 38400, because that's the way
|
||
|
|
I like it :-)
|
||
|
|
|
||
|
|
Thanks to Pantelis for lots of the work on this board port.
|
||
|
|
|
||
|
|
Have Fun!
|
||
|
|
|
||
|
|
-- Dan
|
||
|
|
|
||
|
|
15 August 2005
|