Hardware Dependent Software Principles And Practice by Wolfgang Ecker, Wolfgang Müller, Rainer Dömer

By Wolfgang Ecker, Wolfgang Müller, Rainer Dömer

Despite its significance, the position of HdS is commonly underestimated and the subject isn't really good represented in literature and schooling. to handle this, Hardware-dependent Software brings jointly specialists from diverse HdS components. through supplying a finished assessment of basic HdS rules, instruments, and purposes, this publication presents sufficient perception into the present know-how and upcoming advancements within the area of HdS. The reader will locate an enticing textual content booklet with self-contained introductions to the foundations of Real-Time working platforms (RTOS), the rising BIOS successor UEFI, and the Abstraction Layer (HAL). different chapters disguise commercial purposes, verification, and gear environments. instrument introductions hide the appliance of instruments within the ASIP software program device chain (i.e. Tensilica) and the iteration of drivers and OS parts from C-based languages. functions specialise in telecommunication and automobile systems.

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1 Processor Management and Scheduling The processor management and the scheduling policy strongly depend on the design decisions of control strategy and the architectural design. The initial problem of the processor management is the assignment of processes to different processors. In the case of centralized control, the scheduling algorithm deals with NP-completeness. In homogeneous systems, each process can be assigned to any processor in the system whereas in heterogeneous architectures specific tasks can only be executed on specialized task-specific/applicationspecific system components.

These option ROMs were non-volatile memory components which typically resided on the hardware of the add-in card itself. In implementation, however, Option ROMs were always second class citizens, with difficulty getting control after initialization and even accomplishing fundamental tasks like allocating memory.

Client/Server IPC. In contrast to monolithic kernels we also have to deal with an impact on the real-time behavior, because now system calls are not necessarily executed at the time they have been initiated. The reason is that the services behave like regular processes that have to be scheduled by the real-time scheduler. There are several approaches to deal with that problem. A very simple one is to use priority message queues for the service requests within the server and to apply priority inheritance on the server processes to guarantee that no unbound blocking time can occur [Sta01, Tan01].

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