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opb master kills linux?

I have a xilinx v4 project running mv linux 2.6.10. I have a custom peripheral I made that includes DMA on the opb bus and is therefore master/slave. The SDRAM that the linux .elf file loads to/boots from is also on the opb. Unless I disconnect the custom peripheral linux dies at "uncompressing linux...".

I believe this means that there are data errors from the sdram, but everything works fine stand-alone. I know the dma isn't running, for example, and I've made sure to reset every other register related to that peripheral but linux just won't boot unless I disconnect it.

Any ideas?

Thanks, Clark

Reply to
Anonymous
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Can you run the auto-generated TestApp_Memory sucessfully when your peripheral is in the system?

More broadly, are you able to confirm that your core is behaving itself on the OPB bus? Either through simulation or by running standalone testslike TestApp_Memory etc?

John

Reply to
John Williams

also

that

peripheral

the

Yes, all my stand alone applications work fine including one that DMAs data from the offending peripheral to the main memory where the linux .elf is loaded.

Thanks, Clark

Reply to
Anonymous

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