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What is the reason to have been dropped the entire dcache invalidation?

Yasuhiko Koumoto

Hi ARM experts,

I have just remembered that the entire dcache could not be invalidated by one instruction from ARMv7.

I would like to know the reason.

Can anyone answer this question?

Thank you and best regards,

Yasuhiko Koumoto.

Parents
  • 0 in reply to daith

    The dcache invalidate and clean instruction had been dropped at the ARMv7, either. I say about the all dcache instructions which deal with the entire cache by one CP15 instruction. Of course, I feel no inconvenience at the present situation. However, I would like simply to know the reason why entire dcache operations are deteded although ARM11 MPCore supported such instructions.
    I am afraid there would have been some inconveniences or bugs for such the entire dcache operations.

Reply
  • 0 in reply to daith

    The dcache invalidate and clean instruction had been dropped at the ARMv7, either. I say about the all dcache instructions which deal with the entire cache by one CP15 instruction. Of course, I feel no inconvenience at the present situation. However, I would like simply to know the reason why entire dcache operations are deteded although ARM11 MPCore supported such instructions.
    I am afraid there would have been some inconveniences or bugs for such the entire dcache operations.

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