| 摘要 |
A read allocation indicator (e.g. read allocation signal 30 ) is provided to storage circuitry (e.g. cache 22 ) to selectively determine whether read allocation will be performed for the read access. Read allocation may include modification of the information content of the cache ( 22 ) and/or modification of the read replacement algorithm state implemented by the read allocation circuitry ( 70 ) in cache ( 22 ). For certain types of debug operations, it may be very useful to provide a read allocation indicator that ensures that no unwanted modification are made to the storage circuitry during a read access. Yet other types of debug operations may want the storage circuitry to be modified in the standard manner when a read access occurs.
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