> Hmm. Don't think so. Since the use of ioremap() I think the MMU treats the > area as none-cacheable, right? Thats only the first half of the story. If you don't decode byte level fetches in the FPGA or the code is doing something like read 16 bit value shift 8 return half for 8 bit reads you'll get wrong answers. Alan - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html