MMIO {Re: IDE-flash device and hard disk on same controller}

[Andre Hedrick]

Geert,

The proof.

ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
SiI680: IDE controller on PCI bus 00 dev 90
SiI680: chipset revision 1
SiI680: not 100% native mode: will probe irqs later
SiI680: BASE CLOCK == 133
    ide0: MMIO-DMA at 0xe080df00-0xe080df07, BIOS settings: hda:pio, hdb:pio
    ide1: MMIO-DMA at 0xe080df08-0xe080df0f, BIOS settings: hdc:pio, hdd:pio
PIIX3: IDE controller on PCI bus 00 dev 39
PIIX3: chipset revision 0
PIIX3: not 100% native mode: will probe irqs later
    ide2: BM-DMA at 0xffa0-0xffa7, BIOS settings: hde:DMA, hdf:DMA
    ide3: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdg:pio, hdh:pio
hda: Maxtor 4G160J8, ATA DISK drive
hdb: Maxtor 4G160J8, ATA DISK drive
hdc: Maxtor 4G160J8, ATA DISK drive
hdd: Maxtor 4G160J8, ATA DISK drive
hde: ATAPI 44X CDROM, ATAPI CD/DVD-ROM drive
hdf: CREATIVEDVD5240E-1, ATAPI CD/DVD-ROM drive
ide0 at 0xe080df80-0xe080df87,0xe080df8a on irq 9
ide1 at 0xe080dfc0-0xe080dfc7,0xe080dfca on irq 9
ide2 at 0x1f0-0x1f7,0x3f6 on irq 14

On Wed, 21 Aug 2002, Geert Uytterhoeven wrote:

> On Tue, 20 Aug 2002, Jeff Garzik wrote:
> > Jeff Garzik wrote:
> > > Attached is the ATA core...
> > 
> > Just to give a little bit more information about the previously attached 
> > code, it is merely a module that does two things:  (a) demonstrates 
> > proper [and sometimes faster-than-current-linus] ATA bus probing, and 
> > (b) demonstrates generic registration and initialization of ATA devices 
> > and channels.  All other tasks can be left to "personality" (a.k.a. 
> > class) drivers, such as 'disk', 'cdrom', 'floppy', ... types.
> 
> Looks nice (at first sight)!
> 
> But one limitation is that it always assumes the IDE ports are located in I/O
> space :-(
> What about architectures where IDE ports are located in MMIO space? Or worse,
> have some ports in I/O space (e.g. PCI IDE card) and some in MMIO space (e.g.
> SOC or mainboard IDE host interface)?
> 
> Gr{oetje,eeting}s,
> 
> 						Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [e-mail]
> 
> 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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Andre Hedrick
LAD Storage Consulting Group