By Vijay Madisetti
The platform-centric SoC strategy is geared toward the layout of today’s SoC structures with emphasis on real-time, embedded platforms. The process presents a suggestion and an SoC layout setting that promotes an integration of state of the art instruments and methods worthy for the improvement of the structures. It renders a brand new and higher viewpoint in the direction of co-design methods, whereas additionally elevating a degree of layout abstraction. as the configurable platform gadgets are designed off-cycle, they give a contribution to a normal development in improvement time. via incorporating their utilization, the final process moves a stability among overall layout flexibility and minimum time-to-market. In bankruptcy 1, demanding situations within the co-design of SoCs are brought. The bankruptcy in brief describes the technical demanding situations dealing with method builders and introduces a proposed option to the matter. the rest of this ebook provides a extra thorough exam at the challenge and the proposed strategy. bankruptcy 2 describes the proposed platform-centric SoC layout procedure intimately. It illustrates the layout movement and discusses every one major step within the layout strategy. Definition of a platform as initially outlined through Sabbagh , in addition to the platform-based and platform-centric layout methods, are awarded. The bankruptcy concludes via evaluating the proposed process with past comparable paintings. bankruptcy three lays out the technological history for the proposed SoC layout approach. while the platform expertise is mentioned in bankruptcy 2, this bankruptcy provides an summary of the opposite primary applied sciences: the Unified Modeling Language (UML) and the Extensible Markup Language (XML). The bankruptcy starts with an creation to UML as a modeling device rather well perceived in the software program engineering group. it really is through a dialogue on an try by way of the item administration crew (OMG) to empower UML for the advance of real-time embedded software program – an attempt for you to finally culminate in a layout framework referred to as the UML Profile for Schedulability, functionality, and Time Specification . Thereafter, an summary of XML and some different similar net applied sciences occur. bankruptcy four outlines the constitution of the library of platform items (LPO), in addition to furnishes a finished guide and necessities specification platform item needs to own so that it will be scalable and appropriate with the proposed strategy. crucial parts for every platform item, e.g. structure blueprint, XML-based self-described modules, platform handling instrument, etc., also are mentioned intimately. bankruptcy five offers an in depth therapy of UML extensions for the improvement of real-time embedded platforms. The bankruptcy begins with a structure of the Co-design Modeling Framework (CMF) hierarchy that encompasses 5 different sub-profiles – the commonplace software profile (PCUprofile), the Exception Modeling profile (EMprofile), the Interrupt Modeling profile (IMprofile), the Synthesizable Description Language profile (SHDLprofile), and the structure Blueprint profile (ABprofile). every one of those profiles furnishes a layout framework that's particularly adapted for the proposed strategy, and should have the ability to meet with the demanding situations posed via the layout and try of real-time embedded SoC-based structures. The bankruptcy, then, proceeds to debate the area notion for every sub-profile, via the outline of the corresponding stereotypes. bankruptcy 6 applies the platform-centric SoC layout technique, utilizing the CMF profile in UML, to the advance of a simplified camera process in order to display the use and the robustness of the proposed strategy. particularly, the NiOS improvement board is used to imitate the digicam procedure the place uncooked photograph info are learn from a charge-coupled machine (CCD), after which JPEG encoded and saved into reminiscence. The bankruptcy starts with an outline of the Altera’s NiOS approach, by means of the particular method improvement approach that explicitly demonstrates using the proposed strategy. A quantitative overview is then provided that compares the improvement price of the proposed platform-centric SoC layout technique opposed to a few substitute ways utilizing price estimation versions and instruments. bankruptcy 7 concludes the ebook with a precis and a dialogue of destiny instructions for this attempt on platform-based layout.
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Extra resources for A Platform-Centric Approach to System-on-Chip (SOC) Design
Although the current results claim to be two to three orders of magnitude more efficient in power and area than architectures based on software processors, the chip-in-a-day approach finds its limitations in the following: It still cannot improve upon the execution time. It remains to be seen if this approach can support a much more complex real-time embedded SoC design. 4 OTHER EMBEDDED DESIGN APPROACHES USING UML The platform-based design concept  upon which the chip-in-a-day approach is based also spawns an inception of the proposal for the Embedded UML profile  whose objective is to merge real-time UML and HW/SW co-design together.
A study by Edwards  based on Amdahl’s Law , which limits the possible overall speedup effects obtainable by accelerating a fraction of a program, suggests that it is not worth the effort to attain a substantial speedup for an arbitrary program by moving part of it to hardware. To support his claim, Edwards shows that if a part of the program which accounts for as much as 90% of the execution time is moved to an ASIC, it is still not possible to achieve more than a speedup factor of 10, even under ideal circumstances where the ASIC executes infinitely fast and communication cost is disregarded.
The profile furnishes a design framework that (1) enables the construction of models that could be used to make quantitative predictions about the QoS characteristics, and that (2) facilitates communication of design intent among developers in a standard way . A UML profile, shown as a package notation adorned with «profile», is a collection of predefined stereotypes that is used to tailor UML for a specific problem domain. g. an analysis method provider, or an infrastructure provider, with a means to effectively model real-time applications for analysis and synthesis via a predefined set of RT-related stereotypes.
A Platform-Centric Approach to System-on-Chip (SOC) Design by Vijay Madisetti