Lennart Sorensen wrote:
On Thu, May 31, 2007 at 10:21:57AM +0930, Jonathan Woithe wrote:
I don't think so but I could be wrong. When "Configure SATA as" was set to
"IDE" the HDD was being detected as a SATA drive and showed up as /dev/sda.
The only visible difference the change to "AHCI" made was that instead of
the drive being handled by the ata_piix it now utilises the ahci driver
(which is a much better driver). The other interesting thing is that the
probe for the Marvell PATA device occured before the initialisation of the
ata_piix driver (or ahci for that matter), so as far as I can tell ata_piix
had no chance to grab any ports before the marvell driver initialised.
Linux can still detect the chip and drive it natively even if the bios
is emulating IDE/PATA on the chip. And libata will make both PATA and
SATA show up as /dev/sda now if you use libata for both. On the other
hand if the bios has configured the intel chip to use the standard ide
registers, then it can't have configured the marvell to do so I would
guess, which could make it difficult to talk to.
Mostly true... "standard IDE" can be configured in two modes, legacy
mode and native mode. Legacy mode has fixed addresses originating from
the ISA days (0x170, 0x1f0, irqs 14 & 15), and (as you implied) you
cannot bind two IDE controllers to the same ISA addresses.
OTOH, an unlimited number of IDE controllers can be configured into
native mode, where all addresses and irq are allocated using standard
means accorded all PCI devices.
Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
