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Hello,
I am having a strange problem....I have 2 unix systems with the same PCI board. System A is working and yields the following PCI layout:
BAR SIZE TYPE 0 0x200 memory 1 0x100 I/O 2 0x4000000 memory 3 0x10 I/O
I am writing a device driver (2.6 kernel) for system B, (which is not working) and I get the same PCI layout as above EXCEPT the contents of system A's BAR 1 I/O memory show up in system B's BAR 0 memory space. I think the BAR 2 memory contents match up OK but system B's BAR 3 region is messed up also. For some reason I cant ioremap my I/O regions. I check all the return values from "pci_resource_start()", "pci_resource_len()", and "ioremap()" and they look reasonable.
My setup code is as follows for all 4 BAR areas:
start = pci_resource_start(pdev, BAR1); len = pci_resource_len(pdev, BAR1); bar1_addr = ioremap_nocache(start, len);
To write to BAR1 area I use:
iowrite_32(value, bar1_addr);
To read from BAR1 area I use:
ioread_32(value, bar1_addr);
Is there anything I am missing here I am pulling my hair out trying to access this board!!!
Thank you for your time.
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