On Fri, Jun 10, 2005 at 01:28:45AM -0700, sushil mayengbam wrote: > hello k-landers, > i'm getting confused on the address space of PCI configuration space > when we talked abt PCI I/O space and PCI Memory space. (don't advice > me to look on rubini's book---). Why not? > i feel that when the computer starts, the linux initialization code > scans the pci_devs anything inserted on the pci slot. then, it maps > the share memory(status register, command,i/p buffer etc) on the high > memory end of physical RAM etc. Yes. > And what abt the PCI configuration space and the PCI I/O space??? > where did they get mapped??? I/O space goes in the same area as the pci memory space. Config space does not get mapped to anything. > i'm really really doubtful on this logical address space of I/O, > Memory Mapped and how they are mapped onto actual physical RAM on x86 > m/cs as far as pci devices are concerned. pliz let me some help > regarding this issue. What do you need to know this kind of stuff for? The kernel takes care of it all for you. thanks, greg k-h -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
