On Wednesday 02 May 2007 06:39, Jonathan Pratt wrote:
I'm trying to get u-boot up and running on an Intel MonteJade (IXDPG425) board without much luck.
I downloaded version 2.0 of the Npe code and placed it in the appropriate directory and the build worked fine. Getting it up and running on the board has proved more difficulat.
I'm using a Macraigor USB wiggler to download to the FLASH. If anyone has done this successfully then I would appreciate some pointers as I'm not sure what I've done thus far is correct.
As far as I understand it, the xscale starts up in little endian mode. The application is, however, big-endian. When I program the FLASH it appears to be big-endian, and I don't as yet understand where the transition from little endian occurs. The u-boot code in the current state doesn't go anywhere with no response from the serial port.
Is there some pre-bootloader code which does the transition to big-endian?
No.
If so, do I need to program this sepeartely? If not, where does the transition to big-endian occur and why does the code I see (in the srec file, for example) appear to start off big-endian?
Because it's compiled to be in big endian format. All IXP4xx U-Boot & Linux implementations I know of are done in big endian mode.
I can imagine ld getting pretty confused trying to link a little-endian snippet to a big-endian application.
I have to admit, that I don't know right now, where this big endian/little endian change is made. Perhaps some boot-strapping pin? Not sure, would have to look in the manual. Martijn? Could you jump in here?
For the 2 IXP4xx boards I used (ixdpg425 and pdnb3) I can say, that they "just work" with the current U-Boot implementation in big endian mode. And here definitely no pre-bootloader is required.
What exactly is your problem? Can you see where the U-Boot hangs with you debugger? You are aware that the IXDPG425 port uses UART1 (and not UART0) for console with 115200 baud.
Best regards, Stefan
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