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The correctness of kernel is the key to the safety critical embedded application, and only by formal verification it can prove the kernel does not exist some defects or meet certain attributes. In this paper, we introduce SAFEBOX, a microkernel based on spatial-temporal isolation, give the formal description of SAFEBOX, and use theorem proverb Isabelle/HOL to verify the functional and non-functional...
An innovative high throughput and scalable multi-transform architecture for H.264/AVC is presented in this paper. This structure can be used as a hardware accelerator in modern embedded systems to efficiently compute the 4×4 forward/inverse integer DCT, as well as the 2-D 4×4 / 2×2 Hadamard transforms. Moreover, its highly flexible design and hardware efficiency allows it to be easily scaled in terms...
This article discussed about modeling of uCOS real time operation system kernel which is widely used in embedded system field based on CSP, describing the behavior of uCOS from the higher abstract layer, to help us understand how uCOS working better, also provide foundation of further working on uCOS includes model checking and soundness verification on uCOS. This article focused on the task scheduling...
The current researches to improve the reliability of operating systems have been focusing on the evolution of kernel architecture or protecting against device driver errors. In particularly, the device driver errors are critical to the most of the complementary operating systems that have a kernel level device driver. Especially on special purpose embedded system, because of its limited resources...
The increasing demand for low power and high performance multimedia embedded systems has motivated the need for effective solutions to satisfy application bandwidth and latency requirements under a tight power budget. As technology scales, it is imperative that applications are optimized to take full advantage of the underlying resources and meet both power and performance requirements. We propose...
In real-time operating systems, timer interrupts are usually used for indicating when a real-time task should be started. Critical sections with interrupts disabled can, however, cause an unacceptable delay in the execution of these tasks. Existing approaches for overcoming this issue either require modifications to many places in the kernel source or introduce a new structural design. In this paper,...
Hardware acceleration is crucial in modern embedded system design to meet the explosive demands on performance and cost. Selected computation kernels for acceleration are usually captured by nest loops, which are optimized by state-of-the-art techniques like loop tiling and loop pipelining. However, memory bandwidth bottlenecks prevent designs to reach optimal throughput with respect to available...
Scratch-pad memory (SPM), a small fast software-managed on-chip SRAM (static random access memory), is widely used in embedded systems. With the ever-widening performance gap between processors and main memory, it is very important to reduce the serious off-chip memory access overheads caused by transferring data between SPM and off-chip memory. In this paper, we propose a novel compiler-assisted...
Most operating systems integrate a GUI environment to benefit for their users nowadays. The response time of such GUI environment is especially important for the handhelds in that they need more interactive services than general computer systems. A modified interactive oriented scheduler (MIOS) based on Linux kernel 2.6.21 is presented in this paper to provide a fast prototyping scheduling model for...
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