Method for sharing single program memory by four-core processor system

Abstract

The invention discloses a method for sharing a single program memory by a four-core processor system. The method that two-phase clocks are used and the method that memory addresses are separately piled according to odd serial numbers and even serial numbers are combined. Four processors of the four-core processor system are respectively a Core0, a Core1, a Core2 and a Core3, and memory access addresses, corresponding to the four processors, on an address bus are respectively addr0, addr1, addr2 and addr3, wherein the Core0 and the Core1 belong to a set A1 and are driven by the clock phi 1, the Core2 and the Core3 belong to a set A2 and are driven by the clock phi 2, the shared memory SMEM is driven by a clock HCLK, the phase of the clock phi 1 and the phase of the clock phi 2 are opposite, and the frequency of the clock phi 1 and the phase of the clock phi 2 are half the frequency of the clock HCLK. Because the phase of the clock phi 1 and the phase of the clock phi 2 are opposite, the two groups of Cores, namely the A1 and the A2, can independently access the memory without being mutually interrupted or generating accessing competition. The method for sharing the single program memory by the four-core processor system solves the problem of access competition generated when the memory is shared by the four-core processor system.

Description

technical field [0001] The invention relates to a method for sharing a single program memory in a quad-core processor system, which belongs to the computer hardware embedded technology. Background technique [0002] In the multi-tasking processor system, in order to improve the signal processing speed, it is necessary to use a multi-core processor system to work. In the literature [1], Duan Chuanhua et al. realized two-chip memory sharing and fast access technology design in DSP. DSP shares DDR SDRAM and solves the problem of accessing shared memory at the same time, but the sharing mechanism of this method is simple and direct, and can only solve the problem of shared memory of two cores. Contents of the invention [0003] The invention technically solves the problem: overcomes the deficiencies of the prior art, provides a method for a quad-core processor system to share a single program memory, and solves the access competition problem of a quad-core processor system to ...

AI Technical Summary

Problems solved by technology

[0002] In the multi-tasking processor system, in order to improve the signal processing speed, it is necessary to use a multi-core processor system to work. In the literature [1], Duan Chuanhua et al. realized two-chip memory sharing and fast access technology design in DSP. DSP shares DDR SDRAM, and at the same time solves the problem of accessing the shared memory, but the sharing mechanism of this method is simple and direct, and can only solve the shared memory problem of two cores

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