Excavating
Patent
1994-07-07
1997-09-23
Beausoliel, Jr., Robert W.
Excavating
39518301, 395473, G01R 3128, G06F 1100, G06F 926
Patent
active
056712316
ABSTRACT:
A system and method for testing the snoop capabilities of a read-only code cache system. A test code sequence for testing the snooping operations of the read-only code cache is first loaded into system memory, and an identical copy of the test code sequence is loaded into the read-only code cache system at the same address. A direct memory access (DMA) transfer is then initiated to transfer one or more instructions to overwrite a portion of the system memory where the test code sequence is located. If the snooping functions of the read-only code cache are operating properly, the code cache will detect the cycles and invalidate the respective lines in the code cache where the instructions are located. Upon completion of the direct memory access transfer, the CPU performs the remainder of the test code sequence and determines whether the snooping operations performed properly.
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Beausoliel, Jr. Robert W.
Dell USA L.P.
Tu Trinh L.
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