On Thu, May 24, 2012 at 4:37 PM, Stefan Hajnoczi <stefanha@xxxxxxxxx> wrote: > On Thu, May 24, 2012 at 9:26 AM, Zhi Yong Wu <zwu.kernel@xxxxxxxxx> wrote: >> Does anyone let me know what cardbus bridge is used for? What is the >> difference between it and comon pci bridge? > > CardBus is PCMCIA (PC Card): > > http://en.wikipedia.org/wiki/PC_Card#CardBus > > It's not used very much anymore. There is PCI <-> PCMCIA integration > and that's why you see it come up in PCI code. got it. thanks. > >> By the way, someone usually mentioned pci host bridge, pci root >> bridge. What the differences among them are? > > I'm not sure what the exact difference is. PCI "root" bridge refers > to the hierarchical nature of PCI, while PCI "host" bridge refers to You mean that PCI "root" bridge is one alias of another some bridge? > connecting the computer to the PCI bus. I guess that PCI "host" bridge is the one which connects PCI bus 0 to host bus, and it should be contained in PMC chipset (PCI Bridge and Memory Controller) > > If you want to know the exact meanings, try the PCI and PCI Express > specifications. > > Stefan -- Regards, Zhi Yong Wu -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
