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Jiří Svoboda
Day Sunday
Room K.3.201
Capacity 85
Start time 15:05
End time 15:50
Duration 00:45
Track Microkernel OS Devroom
helenos_dd.pdf (slides)

Dive into HelenOS Device Drivers

Implementing support for device drivers (device driver frameworks) in a microkernel-based/multiserver operating system presents some unique challenges. In this talk we will go through all the important aspects of device drivers in HelenOS, at the hurdles and the ways they can be overcome. We will discuss topics such as:

  • Programmed I/O and DMA in user space
  • Level interrupt handling and interrupt clearing, tasklets
  • Cooperation of user-space drivers and kernel (debugging) drivers
  • DDF and Device Manager - automatic driver start, device enumeration and hot (un)plug
  • Exposing driver services, Location Service - drivers are not created more equal than others, a.k.a Death of the Pseudo Device

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