Prediction-Based Low-Power Isolated Address Flip Request Transmitter

Abstract

The present invention discloses a prediction based low-power isolation address rollover request transmitting device. The device comprises a request unit, a target unit, and an arbitration unit. In the arbitration unit, an address comparator is used for comparing whether a request address has hit an address space of the target unit; an access trigger is used for, according to a comparison result of the address comparator and a prediction value output by a prediction unit, arbitrating whether an access request of the request unit can be transmitted to the target unit, and generating a final arbitration result; an address rollover controller is used for, according to the prediction value output by the prediction unit, gating or isolating the request address transmitted to the target unit; and the prediction unit is used for, according to request types, predicting the target unit hit in the access request, outputting the prediction value to the arbitration unit, and according to the comparison result of the address comparator in the arbitration unit and a corresponding prediction algorithm, correcting and updating the prediction value. The apparatus disclosed by the present invention avoids scheme modification, avoids resource addition, reduces system power consumption, and improves performance.

Description

technical field [0001] The invention belongs to the field of processors, and relates to an isolation address reversal request transmitting device. Background technique [0002] On the current system-on-chip (SOC) platform, the central processing unit (CPU) usually performs frequent data interaction with the external target unit through instructions. [0003] When an access request is made to an external unit, an arbitration unit is generally required to perform access arbitration on the request address. The arbitration unit decides whether to send the request of the CPU to a certain target unit according to the arbitration result. If the CPU's access request can access a certain target unit, the arbitration unit will request the corresponding address and request. [0004] A typical arbitration unit contains an address comparator that compares the requested address. Since the number of address bits to be compared by the address comparator is relatively wide, the obtained c...

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Problems solved by technology

[0007] In order to overcome the deficiencies of the existing request transmitting device in solving the problems of power consumption and timing optimization, modifying the architecture, increasing resources, and reducing performance, the present invention provides a method that avoids modifying the architecture, avoids increasing resources, reduces system power consumption, and improves performance. The prediction-based isolated address flip request transmitter means

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