Method for designing specific instruction set processor

Abstract

The invention relates to a method for designing a specific instruction set processor, and the method can make the accuracy performance evaluation at the beginning of designing a chip, advance the testof a specific application, speed up the design process and reduce the re-design possibility which is because the performances of the chip can not achieve the requirements. The method establishes an LISA processor model at the early stage of the design, generates a corresponding software tool by the LISA model, builds up a virtual prototyping platform which is similar to the performances of real hardware on an ARM ESL, including a AHB bus model with precise cycle, an EMI model and an SDRAM model which are needed for designing the platform, searches out the performances under the different situations by repairing the models of the processor, obtains an optical software / hardware dividing method, directly verifies on the models and speeds up the design cycle of the processor.

Description

technical field [0001] The invention relates to a design method of a processor, in particular to a design method of a special-purpose instruction set processor, which belongs to the field of embedded microprocessor design. Background technique [0002] At present, the traditional processor design is a serial design method. Firstly, the processor structure is defined, and the software and hardware are divided to determine which functions are realized by the hardware; secondly, according to the result of the software and hardware division, the instruction set of the processor is defined; At the same time, software engineers also began to design the supporting tool chain. Hardware design and software tool chain design are basically independent, and the design methods are completely different, so it is easy to cause inconsistency between hardware performance and software performance. Finally, the system engineer builds the system for performance testing. Since traditional proc...

AI Technical Summary

Problems solved by technology

Since traditional processor design does not achieve a good collaborative design between software and hardware, and the division of software and hardware is done by designers based on experience, if the final performance fails to meet the requirements, the entire design work needs to be redone, seriously affecting the launch of the product time

In addition, the configurable processors that appear on the market only expand their instruction sets to achieve different configurations. They are semi-custom processors, and the flexibility of such processors is relatively low.

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