Re: Geode GX1 and IRQ tables

[ramesh bios]

Ok, so I tried this specific sequence and it failed.

making region read/write
done making region read/write
Verifing priq routing tables copy at 0xf0000...failed,
f0000=b0 while 87c0=24

Could it be that f0000 is mapped to the flash? I'm
trying to figure out whether that is technically
possible for a gx1? Could the hardware somehow have a
control that maps the 2Mbit flash to that block?

Thanks.

--- ramesh bios  wrote:
> Ok, so I think this means I should:
> Enable writes for F0000h thru F3FFFh (in
>
> gx_setup.inc) using BC_XMAP_3
> 2. Copy the pirq table to F0000  as in
> pirq_routing.c:copy_pirq_routing_table
> 3. Enable read and writes for F0000h thru F3FFFh in
> pirq_routing.c:verify_copy_pirq_routing_table using
> BC_XMAP_3
>
> I'll give this a shot when I get some time and see
> how
> it goes.
>
> Thanks.
>
> --- "Ronald G. Minnich"  wrote:
> > for shadow ram, you need to enable writes to go to
> > ram. Later on, when you 
> > are done with a region, you need to enable reads.
> >
> > So the way you do this: figure out which one is
>
> for
> > 0xf0000. Enable writes 
> > (2). At the end of the process, you need to set
>
> (3)
> > for the area.
> >
> > And, somebody will have to explain how this fits
>
> in
> > with the new stuff, as 
> > I have not looked at shadow ram setup at all in
>
> V2!
> > ron
> > _______________________________________________
> > Linuxbios mailing list
> > [e-mail]

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> >
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Geode GX1 and IRQ tables

[Stefan Reinauer]

* ramesh bios  [050304 05:12]:
> Ok, so I tried this specific sequence and it failed.
>
> making region read/write
> done making region read/write
> Verifing priq routing tables copy at 0xf0000...failed,
> f0000=b0 while 87c0=24
>
> Could it be that f0000 is mapped to the flash? I'm
> trying to figure out whether that is technically
> possible for a gx1? Could the hardware somehow have a
> control that maps the 2Mbit flash to that block?

In /dev/bios I've been using the following code to switch between the
ram image and the rom image. I don't have the specs at hand, but you
should look into the specs of device 0x1078:0x0100

static void cs5530_activate(void)
{
        /* Save modified registers for later reset */
        pci_dummy[0]=pci_read(CURRENT,0x52);

/* enable rom write access */
        pci_write(CURRENT, 0x52, pci_dummy[0]|0x06);

}

static void cs5530_deactivate(void)
{
        pci_write(CURRENT, 0x52, pci_dummy[0]);
}

Geode GX1 and IRQ tables

[Ronald G. Minnich]

On Thu, 3 Mar 2005, ramesh bios wrote:
> Ok, so I tried this specific sequence and it failed.
>
> making region read/write

nope. you need to make it write-only,
> Verifing priq routing tables copy at 0xf0000...failed,

then copy

The make it read-write.
> Could it be that f0000 is mapped to the flash?

yes, it's supposed to be!

ron

Geode GX1 and IRQ tables

[Ronald G. Minnich]

On Fri, 4 Mar 2005, Ronald G. Minnich wrote:
> On Thu, 3 Mar 2005, ramesh bios wrote:
> > Ok, so I tried this specific sequence and it failed.
> >
> > making region read/write
>
> nope. you need to make it write-only,

arg, I'm not thinking, we are running out of high memory and then RAM.

So making it read/write should have worked. Blash.

Dump the memory at 0xf0000 BEFORE and AFTER you copy the PIRQ.

ron