I'm now
trying to get the card to do DMA to other PCI cards, and have found a
bug in our chip. Basically, the high bit of the address on PCI
transfers gets dropped. This means that the chip can't address PCI
memory physical addresses over 0x7FFF. Big problem, since the
BIOS on our
I've written a device driver for a proprietary PCI card, and have run
into what seems to be a show-stopping bug. The device I'm writing the
driver for is responsible for running DMA transfers to other PCI
devices, and all of our initial work was going well. I locked down a
contiguous range of
I've written a device driver for a proprietary PCI card, and have run
into what seems to be a show-stopping bug. The device I'm writing the
driver for is responsible for running DMA transfers to other PCI
devices, and all of our initial work was going well. I locked down a
contiguous range
Mike Smith [EMAIL PROTECTED] writes:
If you're working on a single, fixed platform, this should be pretty
simple; they just lop the top bit off the base address they use for PCI
address allocation.
Here's an evil trick you can pull though, if you're *really* desperate
and if you're
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