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device-driver question

device-driver question

Post by Ram G. Iy » Sat, 18 Mar 1995 03:51:07



I am writing a device-driver  for SunOS 4.1.3  on a SPARCstation 2.  I
am awaiting the DDK, but would like to forge ahead without it.

I implemented quite a bit  of the functionality,  but hit a brick wall
when  I  tried to code up  the  XXX_select() routine.   I realize that
XXX_select()  should call  selwait()  but  I don't   have any docs  on
selwait.

Has anyone out there implemented the select()  function in the driver?
If so, could you enlighten me?

I will post a summary with the answers I receive

Thanks.
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1. Device driver question (generic device driver)

Hi, I post this for a colleague, who is unable to post here, so please

Herbert
Now his questions:

Hello,
I'm currently involved in writing a generic device driver, that
implements some common functions for other real drivers. My problem is:
How can I make sure that the generic driver is loaded first (before the
real driver modules)? Is there any order besides the order in the
/etc/system-file?
How does the OS loads it's own generic driver-modules?
Is it on demand ?
If yes, how is the "demanding" encoded, and where (Is there a defaults
file for this ? Is it hardcoded or can it be configured?) ?

Any help appreciated!
Thanks in advance for your replies!

Yours,

Christian

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