Re: An issue about sp5100 watchdog

From: Huang Rui
Date: Tue Dec 08 2015 - 03:14:41 EST


On Mon, Dec 07, 2015 at 11:03:31PM -0800, Guenter Roeck wrote:
> On 12/07/2015 09:42 PM, Huang Rui wrote:
> >Hi all,
> >
> >I found an issue in some of AMD platforms about sp5100, that the MMIO
> >address (0x51413120) is already used by System RAM
> >(00100000-7c2befff)...
> >
> >[ 29.928096] sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver v0.05
> >[ 29.928302] sp5100_tco: PCI Vendor ID: 0x1022, Device ID: 0x790b, Revision ID: 0x4a
> >[ 29.928319] sp5100_tco: Got 0x51413120 from indirect I/O
> >[ 29.928323] sp5100_tco: MMIO address 0x51413120 already in use
> >[ 29.928332] sp5100_tco: SBResource_MMIO is disabled(0xe000a0)
> >[ 29.928333] sp5100_tco: failed to find MMIO address, giving up.
> >
> If I understand the code correctly, the problem is really "SBResource_MMIO is disabled".
> Presumably that is done in the BIOS. No idea if anything can be done about that.
>

Thank you.

Compared with correct message:

00100000-3e4befff : System RAM
01000000-017b1ab3 : Kernel code
017b1ab4-01d4ce7f : Kernel data
01ec4000-02008fff : Kernel bss
3e4bf000-3e8befff : reserved
3e8bf000-3ebbefff : ACPI Non-volatile Storage
3ebqbf000-3ebfefff : ACPI Tables
3ebff000-3ebfffff : System RAM
3ec00000-7effffff : reserved
51413120-51413127 : SB800 TCO <- here
7f000000-f7ffffff : PCI Bus 0000:00

SB800 TCO area is reserved. Then it doesn't find MMIO address from
SBResource_MMIO register...

Thanks,
Rui

> Guenter
>
> >00100000-7c2befff : System RAM
> > 01000000-017b1ab3 : Kernel code
> > 017b1ab4-01d4ce7f : Kernel data
> > 01ec4000-02008fff : Kernel bss
> >7c2bf000-7c8befff : reserved
> >7c8bf000-7cbbefff : ACPI Non-volatile Storage
> > 7cbb6000-7cbb9fff : MSFT0101:00
> > 7cbba000-7cbbdfff : MSFT0101:00
> >7cbbf000-7cbfefff : ACPI Tables
> >7cbff000-7cbfffff : System RAM
> >7cc00000-7effffff : reserved
> >
> >Any idea?
> >
> >Thanks,
> >Rui
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