Messages in this thread | | | Date | Thu, 11 Aug 2005 17:48:07 -0400 | From | Jeff Garzik <> | Subject | Re: [PATCH] IDE: don't offer IDE_GENERIC on ia64 |
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On Thu, Aug 11, 2005 at 03:42:07PM -0600, Bjorn Helgaas wrote: > Tony, others, does this change give you any heartburn? On > the 460GX and 870 boxes I have, IDE is a PCI device. > > (I have been told that the SGI ia64 simulator depends on > IDE_GENERIC. But it really should make the IDE device > appear in PCI (or describe it via ACPI)).
I think I was misunderstood.
Have you reviewed the PCI IDE specification?
On modern chipsets, the IDE device appears in PCI -- but often, the first four I/O ports will be zeroed out, indicating that the I/O regions are actually 0x1f0/0x170.
For example:
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller (rev 02) (prog-if 8a [Master SecP PriP]) Subsystem: Hewlett-Packard Company d530 CMT (DG746A) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Step ping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort - <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 169 Region 0: I/O ports at <ignored> Region 1: I/O ports at <ignored> Region 2: I/O ports at <ignored> Region 3: I/O ports at <ignored> Region 4: I/O ports at 14c0 [size=16] Region 5: Memory at 40000000 (32-bit, non-prefetchable) [size=1K]
Trust me, IDE on PCI is still quite weird.
Jeff
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