hi, scott: Thanks for replying! > In what specific way does it not work? when I use iowrite8 to write, things seem OK, the codes continue running, when I use ioread8 to read, the console I use freezes. The console stops responding. > Why can't it succeed? Is there nothing mapped at 0xfc7fc000? My PCIe card's local bus register is at BAR0+0xC7, so the driver should access 0xfc7fc027 and the following 7 bytes. But When I access the areas: ioread8 just freezes.
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