Hi,
I'm trying to install FreeBSD 8.0 on AMD Geode LX800 (CS5536 "southbridge").
However, it cannot detect the IDE controller (in the CS5536) correctly. It says
something similar to this:
"IDE controller not present"
I did lspci in Linux (BackTrack 3)
and I saw that the IDE controller Base Address Registers (BARs)
are all disabled (only contains zeros),
except for one of them (BAR4).
BAR4 decodes 16-bytes I/O ports (FFF0h-FFFFh).
The decoded ports "seems" to conform to the PCI IDE specification
for "native-PCI IDE controller" (relocatable within the
16-bit I/O address space).
I did "cat /proc/ioports" and I found that
the following I/O port address ranges decoded correctly
to the IDE controller in the CS5536 "southbridge":
1F0h-1F7h
3F6h
170h-177h
FFF0h-FFFFh
My question:
Does FreeBSD require the IDE controller BARs
to be programmed to also decode
legacy I/O ports ranges (1F0h-1F7h,3F6h and 170h-177h)?
What if those ranges are not programmed into the BARs
of the IDE controller?
Would the IDE controller be considered
not present (disabled)?
TIA,
Darmawan
PS: I'm working on the BIOS for this particular system
but I have yet to be able to program the BARs to the
aforementioned legacy I/O port ranges.
This system is very peculiar because the PCI subsystem
is virtualized.
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