By Alexander Biedermann
Alexander Biedermann offers a primary hardware-based virtualization strategy, that can remodel an array of any off-the-shelf embedded processors right into a multi-processor process with excessive execution dynamism. in line with this method, he highlights ideas for the layout of power conscious structures, self-healing platforms in addition to parallelized platforms. For the latter, the radical so-called Agile Processing scheme is brought by way of the writer, which permits a continuing transition among sequential and parallel execution schemes. The layout of such virtualizable structures is extra aided through creation of a committed layout framework, which integrates into present, advertisement workflows. for that reason, this e-book presents finished layout flows for the layout of embedded multi-processor systems-on-chip.
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Additional info for Design Concepts for a Virtualizable Embedded MPSoC Architecture: Enabling Virtualization in Embedded Multi-Processor Systems
The number of crossbar switches necessary to form a Beneš network of the size i × i is given as ni×i = (mi×i − i/2) · 2 + i/2 with mi×i being the number of crossbar switches employed in a Butterﬂy network of the size i × i. This number may be calculated by the formula given in the previous paragraph. As for the Butterﬂy network, for i = 2, n2×2 = 1. Due to the increased number of stages, the ﬂexibility increases, therefore lowering the risk of impossible input-output relations. 11 The formula containing n(i/2)×(i/2) to compute ni×i hints to the recursive structure of permutation networks.
Ensure: Seamless continuation of t’s execution. i. , t had already been active at least once 1: if TCM of t is not empty then 2: for all Status registers of p do 3: Inject instruction sequence that will set p’s status register based on value saved inside TCM 4: end for 5: for all General purpose registers of p do 6: Inject load word immediate via CIL into p that reads from t’s TCM into p’s register 7: end for 8: Detach TCM from p’s data memory interface and attach t’s data memory 9: Inject branch instruction to program counter address saved in TCM 10: Detach CIL from p’s instruction memory interface and attach t’s instruction memory 11: else i.
In contrast, the virtualization procedure will take the full context inside a processor core into consideration. For hardware modules with internal states, the works of [Kalte 2005] and [Levinson 2000] highlight context extraction, which is based on a readback of the FPGA’s conﬁguration. While a readback of the FPGA conﬁguration could also be exploited to determine the current state of a software task, this would limit the presented approach to FPGA architectures and, furthermore, would require an off-chip resource managing this context extraction.
Design Concepts for a Virtualizable Embedded MPSoC Architecture: Enabling Virtualization in Embedded Multi-Processor Systems by Alexander Biedermann