On Sun, 4 Feb 2001, Joseph P. Garcia wrote:
should PCIBIOS_MIN_MEM be 0x10000000? I caught this when i noticed it is
That value is suited for `PC' systems.
used as the minimum address in the pci assign resource function, used in such
situations as the OF/ATY-overlap re-allocate in wallstreets. My system would
panic with the lcd melting effect as some may recall.
I brute forced in the following lines in
drivers/pci/setup-res.c:pci_assign_resource()
min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
+ if(res->start==0)
+ min = 0x83000000;
resulting in the same mapping used by Michael Schmitz earlier 2.2 patch.
(its the only re-alloc on my system, so it works :) My kernel isn't
panicing.. yet.
Anyway, looking in /proc/iomem, one might get the idea that PCIBIOS_MIN_MEM
should be defined as 0x80000000. This might resolve the problem I had in a
less brute way. I haven't tried it myself yet. waiting for a second opinion.
The correct fix is to add bus resources that indicate the allowed region.
pci_assign_resource() will assign a region from the allowed region.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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