On Mon, Aug 12, 2013 at 09:49:54PM +0100, Peter Maydell wrote: > On 12 August 2013 21:06, Russell King - ARM Linux > <li...@arm.linux.org.uk> wrote: > > On Mon, Aug 12, 2013 at 06:33:28PM +0100, Peter Maydell wrote: > >> /* Slot to IRQ mapping for RealView EB and PB1176 backplane > >> * name slot IntA IntB IntC IntD > >> * A 31 IRQ50 IRQ51 IRQ48 IRQ49 > >> * B 30 IRQ49 IRQ50 IRQ51 IRQ48 > >> * C 29 IRQ48 IRQ49 IRQ50 IRQ51 > >> * Slot C is for the host bridge; A and B the peripherals. > >> * Our output irqs 0..3 correspond to the baseboard's 48..51. > >> */ > >> > >> ie IRQ48 == board's PCI0 == slot C connector A6 (IntA) == PCI_nINTB > >> == Slot B connector B8 (IntD) == Slot A connector A7 (IntC). > >> > >> and so on round. > >> > >> The 926's routing is one extra round of swizzling because the > >> board itself connects FPGA P_nINTA to its edge connector's > >> INTB (B7) pin rather than INTA (A6) as the EB/1176 do. > >> (This isn't even hinted at in the documentation, you need to > >> either experiment or look at the 926 board schematic.) > > > > Okay, so the above just adds to the confusion, because you appear to be > > mistaking "slot" for the AD signal which the IDSEL pin is connected to. > > The board TRM: > http://infocenter.arm.com/help/topic/com.arm.doc.dui0411d/Cacdijji.html > says that "slot position" and "AD signal connected to IDSEL" > are the same thing:
That's realview, not versatile. Are you saying that both are exactly the same wrt this? > I don't currently have the h/w set up, but digging in my email > archives, when we were running the kernel on the real PB926 > h/w and backplane it was indeed reporting the PCI core (ie > "slot C") as 29, and the other two as 30 and 31: > [ 128.920150] PCI core found (slot 29) > [ 128.920875] pci 0000:00:1f.0: reg 10: [io 0x0af0-0x0aff] > [ 128.920958] pci 0000:00:1f.0: reg 14: [io 0x0a70-0x0a7f] > [ 128.921032] pci 0000:00:1f.0: reg 18: [io 0x01f0-0x01ff] > [ 128.921103] pci 0000:00:1f.0: reg 1c: [io 0x0170-0x017f] > [ 128.921173] pci 0000:00:1f.0: reg 20: [io 0xcc00-0xcc1f] > [ 128.921244] pci 0000:00:1f.0: reg 24: [io 0x8c00-0x8cff] > [ 128.921320] pci 0000:00:1f.0: reg 30: [mem 0xffff0000-0xffffffff pref] With realview or versatile? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
