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Hardware accelerator for PPC microprocessor by: Dimitry Stolberg Reem Kopitman Instructor: Evgeny Fiksman
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Abstract Problem There are complex software functions (e.g. FFT) which takes a lot of CPU recourses Common ways of hardware implementation of such function are complicated Solution Implement whole application in software using ASC technology
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What is ASC ? A Stream Compiler for FPGAs Input : One code stream of mixed software and hardware Output : Two loadable files of software and hardware BUS Power PC Memory Adoption Layer ASC
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Hello World in ASC #include "asc.h" main(int argc, char **argv) { printf("Hello World\n"); STREAM_START; // ASC code start // Hardware Variable Declarations HWint in(IN); HWint out(OUT); HWint tmp(TMP); STREAM_LOOP(16); tmp = (in << 1) + 55; out = tmp; STREAM_END; // ASC code end } Software Hello World Hardware 55 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87
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Project Goals Implement the interface between generic module and a CPU bus using ASC Check speed acceleration on some specific function vs. same function in software.
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General Block Scheme PPC405 Peripherals OPB bus Generic Block Interface to OPB bus FPGA
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S/W & H/W requirements Xilinx Virtex II Pro FPGA with internal PPC405 CPU mounted on evaluation board ASC – A Stream Compiler PamDC: a C++ Library for the Simulation and Generation of Xilinx FPGA Designs
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Project milestones Study functions in PamDC library Understand existing sample of similar interface and design of architecture Implementation of the interface for generic module
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Project milestones Test of interface with simple existing block Design of more complex module Test of interface with the new module
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