The description of the flush (invalidate) and clean operation of the Arm cache in the English original data

Reference from: books "ARM System Developer's Guide-ENG" and "ARM Architecture Fish Programming Second Edition"

clean: Write back the data in the cache that has not been written to the main memory to the main memory.

Flush: It is called invalidate in some books, so the name implies that the invalid flag in the cache is set to 1/0 to invalidate the contents of the cache.

"ARM Architecture Fish Programming Second Edition"

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