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Announcement - Agenda - Paper Presentations

In the paper, a kind of device driver model for XtratuM non-kernel system will be interpreted. In the device driver model, the device drivers run as different xtratum domains with the highest priority in the XtratuM/Linux system. When the device driver interrupt happened, the device driver domain will be activated, and then the device driver domain will treat with the device interrupt, such as reading data, setting I/O, and so on. In the model, the device driver domain can access the device I/O exclusively, and application domains which want to access the device should through the device driver domain. Share memory or share buffer is created for the application domains and driver domain in the model. The driver domain read/write data from/to the share memory when the application domains write/read message to/from those memory. In the paper, a serial device driver case will be showed to explain the model. Sixteen pairs of FIFOs are created in the serial device driver system. In order to assure the FIFO cannot be accessed by different application domains, each pair of FIFO is mapped to one application domain and serial device driver domain. The memory mapping mechanism also can improve data transmission between application domain and driver domain. The usage of the serial device will be presented in the paper too.