As the Nvidia card it does not have PCI IO resource so we got the 20000 to 1ffff thing.
It mean it doesn't allocate resource to it. Limit<start
YH
-----Original Message----- From: Li-Ta Lo [mailto:ollie@lanl.gov] Sent: Tuesday, January 11, 2005 11:13 AM To: YhLu Cc: LinuxBIOS; Eric Biederman Subject: RE: Overlaping IO resource for AMD K8
On Tue, 2005-01-11 at 12:02, Li-Ta Lo wrote:
On Tue, 2005-01-11 at 11:56, YhLu wrote:
Ollie,
I recall sth about mtrr setting, I wonder if I enable the NC could
affect
your code. Please check cpu/x86/mtrr/mtrr.c about enable NC below 4G.
I think there is some problem with the resource allocation. If the vga card has PCI IO resource then there will be no overlaping. If it does not have PCI IO resource then there will be overlaping.
There is really a but in the resource allocation. Please take a look at the attached log files. The ATI card has PCI IO resource so there is no bogus resource in the northbridge. As the Nvidia card it does not have PCI IO resource so we got the 20000 to 1ffff thing.
Ollie
On Tue, 2005-01-11 at 12:39, YhLu wrote:
As the Nvidia card it does not have PCI IO resource so we got the 20000 to 1ffff thing.
It mean it doesn't allocate resource to it. Limit<start
But why it set the resource to the HW registers? Doesn't it cause some ill side effect?
Ollie
Li-Ta Lo ollie@lanl.gov writes:
On Tue, 2005-01-11 at 12:39, YhLu wrote:
As the Nvidia card it does not have PCI IO resource so we got the 20000 to 1ffff thing.
It mean it doesn't allocate resource to it. Limit<start
But why it set the resource to the HW registers? Doesn't it cause some ill side effect?
Setting limit < start is as close as you have to a disable. Nothing falls in that range so nothing is decoded.
Eric
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ebiederman＠lnxi.com -
Li-Ta Lo -
YhLu