Subject: Re: port-i386/1936
To: None <>
From: Jason Thorpe <>
List: netbsd-bugs
Date: 01/15/1996 22:41:50
>Category:       port-i386
>Synopsis:       autoconfig "*" wildcards aren't supported for ISA devices

        Configure an ISA device using a "*"; for example:

        ahb* at isa? port ? irq ?       # Adaptec 174[024] SCSI controllers
        ep* at isa? port 0x300 irq ?    # 3C509 ethernet cards

        Compile the kernel.
        Run, kernel, run!
        See kernel panic.

Seems to me that we shouldn't even get to the compile stage.  If I 
understand it right, config(8) won't let you "*" a device if it's 
qualified with "needs-count" in files*, contrasted with "needs-flag" or 
nothing which does.

Though, it may be annoying to have all those .h files created by 

Firstly, though, lemme make sure I have this right...Say I have device 
foo, configured like this:

foo0	at foobus? addr ?
foo1	at foobus? addr ?

With neither qualifier, no .h files are created.  With needs-flag, we get 
a foo.h containing:

#define NFOO 1

With needs-count, we get:

#define NFOO 2

Note that to actually count the instances, a "*" must be disallowed.

So, if we don't particularly care about having foo.h, why not create a 
"no-star" (I'll be damned if I can remember exactly what Torek called the 
action of "starring" a device in his autoconfiguration paper...).  That 
way we can avoid these configuration mistakes (and cryptic panic 
messages) before we even get the kernel compiled.

Jason R. Thorpe                             
NASA Ames Research Center                               Home: 408.866.1912
NAS: M/S 258-6                                          Work: 415.604.0935
Moffett Field, CA 94035                                Pager: 415.428.6939