By Lars Bauer, Jörg Henkel
Run-time version for Reconfigurable Embedded Processors via: Lars Bauer Jörg Henkel Embedded processors are the center of embedded structures. Reconfigurable embedded processors include a longer guideline set that's applied utilizing a reconfigurable textile (similar to a field-programmable gate array, FPGA). This ebook provides novel recommendations, thoughts, and implementations to extend the run-time adaptivity of reconfigurable embedded processors. innovations and strategies are awarded in an obtainable, but rigorous context. a fancy, lifelike H.264 video encoder software with a excessive call for for adaptivity is gifted and used to illustrate for motivation through the ebook. a singular, run-time method is validated to take advantage of the possibility of adaptivity and specific approaches/algorithms are provided to enforce it. •Presents a brand new method of raise the adaptivity of embedded processors; •Describes a singular method of expanding the adaptivity for reconfigurable processors, defined in a really visual/imaginable demeanour, in addition a really precise/formal demeanour; •Presents a fancy, practical H.264 video encoder software with a excessive call for for adaptivity and makes use of that instance for motivation/in-depth evaluate in the course of the booklet; •Describes a unique run-time procedure that exploits the opportunity of adaptivity and specific approaches/algorithms to enforce it.
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Extra resources for Run-time Adaptation for Reconfigurable Embedded Processors
It is configurable which PSM input is connected to which PSM output. , all hardware descriptions can be synthesized, placed, and routed for fine-grained reconfigurable fabrics (within their area restrictions). Bit- and byte-level computation and manipulation can be realized with rather few reconfigurable resources. In addition, small memories and finite state machines can be implemented using a finegrained reconfigurable fabric. In addition, word-level computation can be realized; however, coarse-grained reconfigurable fabrics are typically more efficient for word-level computation as they are specifically optimized for them.
1 shows a particular instance of the ADRES [BBKG07, MVV+03] coarse-grained reconfigurable fabric. The array comprises coarse-grained reconfigurable functional units (FUs). In general, an FU may correspond to an ALU; however, typically more complex compositions are used. For instance, it may comprise multiple ALUs or an ALU and Adder, etc. , specialized FUs for multiplication). The FUs are connected with each other. Often a two-dimensional arrangement is used and the FUs are connected to their direct neighbors (sometimes also to farther distant FUs and sometimes – when the data may through the array is predetermined – only to some neighbors).
That is also the reason why the PRMs in Figs. 6 correspond to horizontal slots. However, these technical constraints are specific to the particular FPGA family. , it should have the same height. It is possible to reconfigure only parts of a frame by first reading the configuration data of the frame, then modifying the fraction that shall be reconfigured, and writing back the entire frame [HSKB06]. However, that increases the delay of the reconfiguration process significantly (for Virtex-II devices, the obtained flexibility may overcome the overhead).