[PATCH] Add support for accessing the LinuxBIOS CMOS settings from Open Firmware

[Jens Freimann]

Hi,

this patch adds a new file lbcmos.fth to cpu/x86/pc/biosload which makes
it possible to view and manipulate CMOS settings.

For instructions on how to use it type "help-lbcmos" on the ok prompt.

With kind regards,

Jens

[OpenBIOS] [PATCH] Add support for accessing the LinuxBIOS CMOS settings from Open Firmware

[Torsten Duwe]

On Wednesday 10 October 2007, Jens Freimann wrote:
> Hi,
>
> this patch adds a new file lbcmos.fth to cpu/x86/pc/biosload which makes
> it possible to view and manipulate CMOS settings.

+++ cpu/x86/pc/biosload/lbcmos.fth      (Revision 0)
@@ -0,0 +1,246 @@
+purpose: Access LinuxBIOS CMOS settings
+
+fload ${BP}/cpu/x86/pc/biosload/cmos.fth
+

where is cmos.fth ?

Torsten

[PATCH] Add support for accessing the LinuxBIOS CMOS settings from Open Firmware

[Jens Freimann]

Am Freitag, den 12.10.2007, 00:56 +0200 schrieb Torsten Duwe:
> On Wednesday 10 October 2007, Jens Freimann wrote:
> > Hi,
> >
> > this patch adds a new file lbcmos.fth to cpu/x86/pc/biosload which makes
> > it possible to view and manipulate CMOS settings.
>
> +++ cpu/x86/pc/biosload/lbcmos.fth      (Revision 0)
> @@ -0,0 +1,246 @@
> +purpose: Access LinuxBIOS CMOS settings
>
> +fload ${BP}/cpu/x86/pc/biosload/cmos.fth
>
> where is cmos.fth ?

ups, I copied it from cpu/x86/pc/olpc/cmos.fth to the biosload
directory. So the line should either be changed to
    fload ${BP}/cpu/x86/pc/olpc/cmos.fth 
or cmos.fth should be copied to the biosload directory. Or maybe move
cmos.fth to cpu/x86/pc/?

Jens

[PATCH] Add support for accessing the LinuxBIOS CMOS settings from Open Firmware

[Mitch Bradley]

Jens Freimann wrote:
> Am Freitag, den 12.10.2007, 00:56 +0200 schrieb Torsten Duwe:
> > On Wednesday 10 October 2007, Jens Freimann wrote:
> > > Hi,
> > >
> > > this patch adds a new file lbcmos.fth to cpu/x86/pc/biosload which makes
> > > it possible to view and manipulate CMOS settings.
> >
> > +++ cpu/x86/pc/biosload/lbcmos.fth      (Revision 0)
> > @@ -0,0 +1,246 @@
> > +purpose: Access LinuxBIOS CMOS settings
> >
> > +fload ${BP}/cpu/x86/pc/biosload/cmos.fth
> >
> > where is cmos.fth ?
>
> ups, I copied it from cpu/x86/pc/olpc/cmos.fth to the biosload
> directory. So the line should either be changed to
>    fload ${BP}/cpu/x86/pc/olpc/cmos.fth 
> or cmos.fth should be copied to the biosload directory. Or maybe move
> cmos.fth to cpu/x86/pc/?

I suggest putting it in dev/isa/cmos.fth

I'm not sure that it's appropriate to have the stand-init in a generic 
place, though.  The behavior of zeroing the BIOS checksum area if it is 
bad is what we want for OLPC, but perhaps is not always a good idea.
> Jens

[OpenBIOS] [PATCH] Add support for accessing the LinuxBIOS CMOS settings from Open Firmware

[Torsten Duwe]

On Friday 12 October 2007, Mitch Bradley wrote:
> Jens Freimann wrote:
> > or cmos.fth should be copied to the biosload directory. Or maybe move
> > cmos.fth to cpu/x86/pc/?
>
> I suggest putting it in dev/isa/cmos.fth
>
> I'm not sure that it's appropriate to have the stand-init in a generic
> place, though.  The behavior of zeroing the BIOS checksum area if it is
> bad is what we want for OLPC, but perhaps is not always a good idea.

The MC146818 is ISA legacy, so dev/isa has my vote. Pulling out any 
PC-specific or firmware-dependent semantics would be perfect, though.

Torsten

[PATCH] Add support for accessing the LinuxBIOS CMOS settings from Open Firmware

[Maciej W. Rozycki]

On Fri, 12 Oct 2007, Torsten Duwe wrote:
> The MC146818 is ISA legacy, so dev/isa has my vote. Pulling out any 
> PC-specific or firmware-dependent semantics would be perfect, though.

Well, to be exact, MC146818 and anything in the 0x00-0xff port I/O space 
is motherboard, not ISA.  ISA port I/O space is 0x0100-0xffff in theory 
(address lines up to the bit #15 are driven on I/O cycles) and 0x100-0x3ff 
in reality (many cards did not decode address lines from the bit #10 
upward).

And, unlike ISA (in most cases), it is still there in x86-based 
PC/AT-class systems, usually in the south bridge.  OTOH, the 0x100-0x3ff 
stuff migrated to the so called LPC bus and typically got reduced to some 
super-I/O chip hanging off there.

Maciej

[PATCH] Add support for accessing the LinuxBIOS CMOS settings from Open Firmware

[Stefan Reinauer]

* Maciej W. Rozycki  [071012 15:10]:
> Well, to be exact, MC146818 and anything in the 0x00-0xff port I/O space 
> is motherboard, not ISA.  ISA port I/O space is 0x0100-0xffff in theory 
> (address lines up to the bit #15 are driven on I/O cycles) and 0x100-0x3ff 
> in reality (many cards did not decode address lines from the bit #10 
> upward).
>
> And, unlike ISA (in most cases), it is still there in x86-based 
> PC/AT-class systems, usually in the south bridge.  OTOH, the 0x100-0x3ff 
> stuff migrated to the so called LPC bus and typically got reduced to some 
> super-I/O chip hanging off there.

In LinuxBIOS we packed that in a "pc80" directory.

Stefan