What is all the ram used for?

[Mads Bondo Dydensborg]

Hi there.

I have a 

    SCSI storage controller: Adaptec AIC-7871 (rev 0).
      Medium devsel.  Fast back-to-back capable.  IRQ 11.  Master
Capable.  Latency=32.  Min Gnt=8.Max Lat=8.
      I/O at 0xb000 [0xb001].
      Non-prefetchable 32 bit memory at 0xcd000000 [0xcd000000].

Upon inspecting the non-prefetchable memory, it seems that there are 16 MB
of it. (Writing 0xFFFFFFFF to it, reading back, 24 lower bits are blank).  
However, the aic7xxx driver never seems to ioremap more then 256 bytes of
it.

Why is that? Is this memory somehow utilized elsewhere, or?

Any clarification would be greatly appreciated.

Also, if anyone knows of online documentation of the aic7xxx sequenzer, I
would really like to get a pointer for it.

Thanks,

Mads

-- 
Mads Bondo Dydensborg.                               madsdyd at challenge.dk
Sure, some companies might run successful businesses by making Linux easier
to use and offering technical support for the systems, but no business model
based on service and support is ever going to approach the incredible level
of profitability of a Microsoft-style 'pay us for breathing' business
                               - Pat Dorsey, Morningstar



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