I'm currently collecting data about the memory architecture of various
targets for Linux/MIPS. Background is tht the current Linux/MIPS
memory handling is basicly only suited for MIPS systems with one
continuous chunk of memory; it also makes some assumptions about the
address of the available memory. These assumptions fail eg. for
DECstation, rPC44 and supposedly SGI - in short everything that
isn't similar to a Magnum.
Could people which such machines please send me a description of their
machine's memory layout?
Another problem is the DMA. The NCR53C94 is a very polular SCSI chip
among the various MIPS machines; Sparcs also use chips from that family.
As large as the number of machines that use these NCR chips is the number
of different DMA engines. We therefore need a generic NCR driver that
can be efficiently be used with all these DMA engines. I know that there
are some pretty wiered of these DMA engines out there.
So again here the request to post descriptions or pointers to such
describing the DMA engine.