Re: [PATCH] Incorrect segment 0 initialization for PMAC G5

[Phileas Fogg <phileas-fogg%mail.ru@localhost>]

On 03/29/2013 07:58 PM, Michael wrote:

> Nice!
> Are you using 32bit bridge mode or LP64?

For now only 64bit bridge mode. The real 64bit mode needs more work to 
be done.


> Isn't that just another kinda-sorta 'special' OpenPIC?

Yeah, the base adddress is just different.
I have it already up and running :)

> Leaves one question. On 32bit PowerPC ports we BAT-map PCI space with
> bus address == physical address - is there a sane way to achieve that
> on the G5 ( I never really understood how the segment registers work )
> or do I have to write a separate bus_space and have it actually map
> things?

The powerpc PCI code maps everything with pmap automatically.
But the power PCI code needs rework and bug fixing, i stumbled upon a 
few myself and fixed it. I had some problems with PCI enumeration,
OFW data was not parsed correctly, but after i fixed it, it's working 
well now.

Broadcom NICs are enumerated properly now and even USB ports too :)

PowerPC interrupt handling needs some rework too.

Currently i'm at the point where external interrupts are enabled and
the kernel tries to mount root filesystem from memory filesystem :)

But i still have problems with assigned IRQ lines, i think they are 
configured wrong while PCI bus is enumerated. Currently trying  to
fix this issue.

One question. How do i build a memory file system and put it in my 
kernel ? I'm a bit new to NetBSD.

regards