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SubjectRe: IBM Thinkpad G41 PCMCIA problems [Was: Yenta TI: ... no PCI interrupts. Fish. Please report.]
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On Sun, 2005-02-20 at 09:23 -0800, Linus Torvalds wrote:
>
> On Sun, 20 Feb 2005, Russell King wrote:
> > On Sat, Feb 19, 2005 at 08:36:12PM -0500, Steven Rostedt wrote:
> > > BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
> > > BIOS-e820: 000000000009f000 - 00000000000a0000 (reserved)
> > > BIOS-e820: 00000000000d0000 - 00000000000d4000 (reserved)
> > > BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)
> > > BIOS-e820: 0000000000100000 - 000000000f6f0000 (usable)
> > > BIOS-e820: 000000000f6f0000 - 000000000f700000 (reserved)
> > > BIOS-e820: 000000000f700000 - 000000003fef0000 (usable)
> > > BIOS-e820: 000000003fef0000 - 000000003fef8000 (ACPI data)
> > > BIOS-e820: 000000003fef8000 - 000000003fefa000 (ACPI NVS)
> > > BIOS-e820: 000000003ff00000 - 0000000040000000 (reserved)
> >
> > Your BIOS is broken. You probably have 1GB of RAM which extends from
> > 0x00000000 to 0x40000000. However, there's a hole in the ACPI map
> > between 0x3fefa000 and 0x3ff00000.
>
> Good point. And dammit, we've had that problem too many times before.

ACPI will report the ranges available to a PCI root bridge, even on
single root machines. I'm hoping to take advantage of this in my PCI
bus changes. It should help with these sort of problems.

Thanks,
Adam


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