By Alexander Biedermann
Alexander Biedermann provides a time-honored hardware-based virtualization strategy, that can remodel an array of any off-the-shelf embedded processors right into a multi-processor method with excessive execution dynamism. in response to this technique, he highlights ideas for the layout of power conscious platforms, self-healing structures in addition to parallelized platforms. For the latter, the unconventional so-called Agile Processing scheme is brought through the writer, which allows a unbroken transition among sequential and parallel execution schemes. The layout of such virtualizable platforms is extra aided via creation of a devoted layout framework, which integrates into current, advertisement workflows. for this reason, this publication offers accomplished layout flows for the layout of embedded multi-processor systems-on-chip.
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Extra resources for Design Concepts for a Virtualizable Embedded MPSoC Architecture: Enabling Virtualization in Embedded Multi-Processor Systems
Crossbars and Multistage Interconnection Networks One of the oldest interconnection solutions based on telephone interconnects are nonblocking switching networks [Clos 1953]. Here, arrays of crossbars are interconnected in a way so that every input-output permutation can be realized. By its non-blocking structure, each input is guaranteed to be routed to its designated output. In contrast to full crossbars, switching networks reduce the overhead in switching elements and are, thus, less resource-expensive.
State registers save information about past instructions, such as carry information after arithmetic operations. 4, lower portion of right hand side. To preserve the context of a task, the content of the registers has to be extracted out of the processor when deactivating a task. A solution is to output the register content on the data memory interface of the processor and to save it in a dedicated memory. For this purpose, a so-called code injection approach will be exploited. This includes the injection of a dedicated portion of machine code into the processor in order to output its register contents on the data memory interface.
14 2 Virtualizable Architecture for embedded MPSoC Instruction Memory Instruction Memory … … 000C: addi $r1, $r3, 12 0010: sw $r2, 0048 0014: sub $r1, $r6, 7 000C: addi $r1, $r3, 12 0010: sw $r2, 0048 0014: sub $r1, $r6, 7 … … Data Memory Data Memory … … 0040: 0x 00 FC 00 FC 0048: 0x 00 00 00 00 0040: 0x 00 FC 00 FC 0048: 0x 00 00 00 CC … Mem. Ctrl. … Mem. Ctrl. Mem. Ctrl. Mem. Ctrl. MicroBlaze Soft-Core Processor MicroBlaze Soft-Core Processor R1: 0x 00 00 00 FF R2: 0x 00 00 00 CC R1: 0x 00 00 00 17 R2: 0x 00 00 00 CC R31: 0x 00 00 0F 00 R31: 0x 00 00 0F 00 MSR: 0x 10 01 01 01 MSR: 0x 10 01 01 11 … (a) Point in Time t1 .