DDE/DDEKit: Difference between revisions
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Device drivers are an essential element in every operating system, because without them no interaction with the external world is possible. Because of the huge range of available devices, implementing L4 device drivers for even the most common devices on the market would be a tedious job. To circumvent this problem and support a wide range of devices on L4, we designed DDE, the '''D'''evice '''D'''river '''E'''nvironment. Aim of this project is to provide legacy device driver interfaces, so that the large amount of readily available device drivers for other operating systems (such as Linux and BSD) can be reused on L4 with few effort. | Device drivers are an essential element in every operating system, because without them no interaction with the external world is possible. Because of the huge range of available devices, implementing L4 device drivers for even the most common devices on the market would be a tedious job. To circumvent this problem and support a wide range of devices on L4, we designed DDE, the '''D'''evice '''D'''river '''E'''nvironment. Aim of this project is to provide legacy device driver interfaces, so that the large amount of readily available device drivers for other operating systems (such as Linux and BSD) can be reused on L4 with few effort. | ||
DDE consists of three layers: | |||
# '''DDEKit''' is a glue layer between the [[L4Env]] and the higher device driver layers. | |||
# '''DDE''someOS''''' implement OS-specific environments for every supported OS. | |||
# '''native device drivers''' are not modified and simply linked against the DDE/DDEKit libraries and extended with a little server code in order to export their interface to other L4 applications. | |||
== DDEKit == | == DDEKit == | ||
Revision as of 10:57, 3 April 2008
Motivation
Device drivers are an essential element in every operating system, because without them no interaction with the external world is possible. Because of the huge range of available devices, implementing L4 device drivers for even the most common devices on the market would be a tedious job. To circumvent this problem and support a wide range of devices on L4, we designed DDE, the Device Driver Environment. Aim of this project is to provide legacy device driver interfaces, so that the large amount of readily available device drivers for other operating systems (such as Linux and BSD) can be reused on L4 with few effort.
DDE consists of three layers:
- DDEKit is a glue layer between the L4Env and the higher device driver layers.
- DDEsomeOS implement OS-specific environments for every supported OS.
- native device drivers are not modified and simply linked against the DDE/DDEKit libraries and extended with a little server code in order to export their interface to other L4 applications.
