[parisc-linux] sti rom access on B132/B180

[parisc-linux] sti rom access on B132/B180

[Xavier Debacker]

Hi everyone!

i'm trying to find the sti rom...

well, unlike the 712,715 and 725, the address is not in the pdc.

for sgc and gsc based graphic cards, the sti rom has to be available at
the base hpa, which can be one of those addresses: 0xf4000000,
0xf6000000, 0xf8000000, or 0xfa000000.

the bios indicates that the graphics are at 0xf8000000

the other memory spaces are unaccessible, that's ok. 
but the problem is that 0xf8000000 is full of zeros (no rom)

two possibilies then:
- pdc has relocated the sti rom: impossible since kernel doesn't do any
PDC relocation.
- it's pci based card, so the sti rom must be accessible through the pci
expansion rom space and optionally, the base hpa.

so the questions are:
how can i access the pci expansion rom (do you have doc?)?
or do you have any other idea?

thanks for your help!

ESIEE Team.

Re: [parisc-linux] sti rom access on B132/B180

[Grant Grundler]

Xavier Debacker wrote:
> the bios indicates that the graphics are at 0xf8000000

s/bios/PDC/

> - it's pci based card, so the sti rom must be accessible through the pci
> expansion rom space and optionally, the base hpa.

The built-in graphics for B/C-class w/PCX-L2 CPU are *not* PCI devices.
No PCI expansion ROM.

[ In private exchange, Xavier confirmed the device in question is:
  Gecko GSC Core Graphics (10) at 0xf8000000...
]

And I have to confess out of ignorance I broke PCI Expansion ROM
support for A500.  I'll fix it in the near future.
PCI expansion ROM support should work on all other platforms.

grant

Grant Grundler
Unix Systems Enablement Lab
+1.408.447.7253