Re: compat/native?
Frank Wille <[email protected]>
| Newsgroups | gmane.os.netbsd.ports.ofppc |
|---|---|
| Organization | Privates Internet Ostwestfalen/Lippe e.V. |
| Message-ID | <[email protected]> |
Toru Nishimura wrote:
> Now, some NetBSD ports have pci/pciide_machdep.c to divert the
> compat case and the compat IDE HW is known working in legacy
> mode, that is, with legacy register addresses and legacy i8259 IRQs,
> 14 for primary and 15 for secondary.
Now I heard rumours that an IDE controller in compat mode may not work at all
on a non-x86 system ... ?
>> there is simple solution (or hack) to make it work perfectly: whenever
>> the native PCI interrupt handler for irq 14 is installed, I will
>> additionally install the same handler for irq 15. Tested. Works fine!
>
> Is it really "native PCI interrupt handler" in irq (vague term ...) 15/14?
I think so. All registers which could reflect native-mode do that. I checked
them. Nevertheless the 8231 uses both irqs, although it should only use one?
> If s/native PCI/legacy/, then your story makes all sense. The IDE HW
> is working as designed.
Compat/legacy mode doesn't work. I tried everything.
And the IDE interrupt routine register (0x4c) is fixed to 15/14 on the 8231,
you cannot change it to 14/14, according to the specs. Maybe this is the
"feature" causing the observed behaviour?
--
_ Frank Wille ([email protected])
_ // http://sun.hasenbraten.de/~frank/
\X/ Phx @ #AmigaGer