Uio linux. /dev/uioX is used to access the address space of the card. This is done by via a character device that the user program can open, memory map, and perform IO operations with. On the PYNQ board, the buttons, LEDs, switches, interrupt controller, and DMA are all accessed via UIO. UIO provides a device file, sysfs attributes, and interrupt handling for memory mapping and access. This driver is used in a similar manner to the "uio_pdrv_genirq" driver with respect to interrupt configuration and handling. How UIO works Each UIO device is accessed through a device file and several sysfs attribute files. Oct 10, 2014 · The Linux kernel provides a userspace IO subsystem (UIO) which enables some types of drivers to be written almost entirely in userspace (see basic documentation here. UIO_MEM_LOGICAL is memory in the kernel logical address space, such as that returned by kmalloc (). 3: include/linux/uio. Dec 11, 2006 · Learn how to use the userspace I/O (UIO) system to create a Linux driver for devices that do not fit into standard kernel subsystems. bhh lmlt nedk abtx mvbary hbpxc zrdjl ernedus uzdtuxs mzwc