Digilent Embedded Linux - Manual (Page 22)

Using Zynq with Linux
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Sysfs, Proc and Debugfs File System
Your applications run in user mode for Linux and have no access to kernel information but through
system calls. However, some pseudo file systems, e.g. sys file system, proc file system, debug file
system, create a window for users to interact with kernel parameters and inspect kernel status. For
more information on using these pseudo file systems, see debugfs.txt, proc.txt, and
sysfs.txt in the Documentation/filesystems folder of the kernel source.