... snapshot of the configuration registers of each device, one file per device Configuration Registers and Initialization As mentioned earlier, the layout of the configuration space is device independent ... identify the peripherals PCI devices feature a 256-byte address space The first 64 bytes are standardized, while the rest are device dependent Figure 15- 2 shows the layout of the device- independent ... bits first It is possible for one device to offer both 32-bit regions and 64-bit regions PCI I/O resources in Linux 2.4 In Linux 2.4, the I/O regions of PCI devices have been integrated in the...