PCI IDE Controller Base Address Register setting
arundel at freebsd.org
Mon Dec 27 08:48:46 UTC 2010
On Mon Dec 27 10, Darmawan Salihun wrote:
> 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 don't think freebsd-questions is the right place for your issue. you might
get some help over at freebsd-hackers or freebsd-current.
> 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":
> 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)?
> 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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