UVM Verification Platform Address-Based Data Sorting
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Solution Overview
Problem
Conventional UVM verification platforms face challenges in handling out-of-order transmission on buses, leading to incorrect verification results due to unsynchronized data, which affects the reliability of device verification.
Innovation Solution
A device verification method that determines a transaction class for a device under test, instantiates interfaces for input and output data, and compares data sequentially based on addresses to ensure synchronized comparison, thereby avoiding the impact of out-of-order transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequential one-by-one comparison is used for input data and output data, then the comparison process is simple, but wrong verification results are generated due to out-of-order transmission
Solution Approach 1:
The patent applies preliminary action by pre-sorting the input data array and output data array based on address values before comparison. The sorting operation is performed in advance (pre-action) to ensure that corresponding input and output data are properly aligned, preventing verification errors caused by out-of-order transmission. This resolves the contradiction by maintaining simple comparison logic while ensuring reliable verification results through preliminary data preparation.
2Adaptability or versatility
If data are sent early but output results arrive later, then out-of-order transmission is supported, but sequential comparison generates wrong verification results
Solution Approach 1:
The patent uses preliminary action by sorting both input and output data arrays by address before comparison. This pre-processing step ensures that even when data arrive out of order, they are properly aligned with their corresponding counterparts, maintaining verification accuracy while supporting out-of-order transmission scenarios.
Solution Approach 2:
The patent introduces an intermediary sorting mechanism that acts as a mediator between the out-of-order data arrival and the comparison process. By using address-based sorting as an intermediary step, the system reconciles the timing mismatch between early data sending and later result arrival, ensuring accurate verification without requiring strict synchronization.
3Ease of operation
If conventional TLM level communication is used, then standardized interfaces are provided, but synchronized comparison of input and output data cannot be achieved
Solution Approach 1:
The patent maintains the benefits of standardized TLM interfaces while adding a preliminary sorting step that operates on the data arrays before comparison. This preliminary action ensures that the standardized interfaces continue to provide ease of operation, while the address-based sorting achieves reliable data synchronization that the conventional TLM communication alone cannot provide.
Data Source
AI summary
A device verification method, a UVM verification platform, an electronic apparatus, and a storage medium are provided. The method includes: determining a transaction class corresponding to a device under test, and instantiating a first interface in a callback function; sending input data to the device under test based on a bus protocol, and sequentially adding the input data to an array of the first interface according to addresses of the input data; instantiating a second interface in a monitor device, and sequentially adding output data to an array of the second interface according to addresses of the output data; and comparing the input data and the output data that have same addresses in the array of the first interface and the array of the second interface, and outputting a verification result of the device under test according to a comparison result.