Motorola Sys V help

[ftw at datacube.UUCP]

...one thing I forgot:

I also need to test if a given piece of hardware exists on the bus.  There
is a function called bprobe() that does this.  It takes two args, the first
is a physical address, the second is a char sized quantity to be *written*
to that address.  For my driver, it is unacceptable for the probe to write
to the address.  Also, since not all of the hardware I intend to support
will respond to byte-width accesses, I need a 16-bit sized probe as well.
There seems to be an "sprobe" function in my kernel, but I it must not
be what I think it is because it never goes out to the bus (confirmed by
using a VME bus analyzer).

Questions: How do I test for *read* access to hardware?  What exactly is
the sprobe() function?

SunOS has peek() and peekc(), which will probe for hardware and return
a 16-bit or 8-bit (resp.) quantity at the address you ask for, or they
returns (int)-1 if there was a bus-error.  These are what I need to model
under System V.


Thank You for Your Support.


				Farrell T. Woods 

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