Re: [LinuxBIOS] Reading PMBASE, SMI_EN or SMI_STS

[Stefan Reinauer]

* Andon Tschauschev  [070522 14:38]:
> > > Hello,
> > > pmbase_value = pci_read_long(LPCBridge, 0x40);
> >
> > This neads to read
> >
> > pmbase_value = pci_read_long(LPCBridge, 0x40) & 0xfffffffe ;
> >
> > I have not checked the data sheets but I would bet the lowest bit is
> > enable.
>
> From datasheet ICH3M, according to PMBASE:
> 31:16 --  reserved
> 15:7   --  Base address
> 6:1     -- reserved
> 0        -- Resource Indicator -- RO. tied to 1 to indicate I/O space
>
> Should it be
> pmbase_value = pci_read_long(LPCBridge, 0x40) & 0xff80;

yes.
> Is shifting necessary, too (see attached file)?

Does it say which bits of the base address the bits 15:7 correspond to?

I would assume no shift is required.