Date: Wed, 5 Apr 1995 14:53:39 -0400 (EDT) From: Peter Dufault <dufault@hda.com> To: freebsd-hackers@freefall.cdrom.com Subject: spl() and LKM Message-ID: <199504051853.OAA01204@hda.com>
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I realize now that the driver I've been testing using an LKM doesn't
have the interrupt mask set up properly, and I assume that the
"reconfigurable" devices if_ze and if_zp don't work properly (when
they aren't on at initial boot) either.
I've tried to install a driver at tty_mask but spltty() isn't
masking off the interrupt.
Here is what I'm doing right now. I originally had something
neater, but I wanted to see if by brute force copying what
isa_configure does at the end of its configuration pass I couldn't
get it to work properly:
> void
> isa_device_install(isdp, mp)
> struct isa_device *isdp;
> u_int *mp;
> {
> struct isa_device *dvp;
>
> int s = splhigh();
>
> config_isadev_c(isdp, mp, 0);
>
> for (dvp = isa_devtab_tty; dvp->id_driver; dvp++)
> register_imask(dvp, tty_imask);
> register_imask(isdp, tty_imask);
> for (dvp = isa_devtab_bio; dvp->id_driver; dvp++)
> register_imask(dvp, bio_imask);
> register_imask(isdp, bio_imask);
> for (dvp = isa_devtab_net; dvp->id_driver; dvp++)
> register_imask(dvp, net_imask);
> register_imask(isdp, net_imask);
> for (dvp = isa_devtab_null; dvp->id_driver; dvp++)
> register_imask(dvp, SWI_CLOCK_MASK);
> register_imask(isdp, SWI_CLOCK_MASK);
>
> splx(s);
> }
I'm calling this like:
> isa_device_install(&isa_labpc, &tty_imask);
The "register_intr" in config_isadev_c is working fine since my
interrupt is called just fine. The problem is that spltty()
doesn't mask it off.
I expected this brute force recalculation of intr_mask[] and intr_mptr[]
would get me a basis to work from, but no go. Can anyone suggest the
right way to get this to work?
--
Peter Dufault Real Time Machine Control and Simulation
HD Associates, Inc. Voice: 508 433 6936
dufault@hda.com Fax: 508 433 5267
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