by I'm writing a driver for a bit of custom hardware with a PLX9050 PCI
(slave) bridge chip. I understand that I can use the Northbridge on the
motherboard to do bus mastering for my driver's DMA needs. However I can
find very little information
(in both the kernel code and on the web) on how to program it.
I have found out the names of various actual Northbridge
implementations, (e.g. Intel 440 HX) but I need to know which features
are portable to another motherboard and which are features of one
particular Northbridge implementation.
Anyone got any pointers? Specs for standard Northbridge would be great;
sample code even better.
TIA
alan
crossposted: comp.os.linux.hardware, comp.os.linux.development.system
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