Cache Maintenance Transactions

Hi,

I am reading ACE protocol and i am confused about when to use cache maintenance transactions. On what basis should i decide when to use cache maintenance transaction and which transaction to be used?

Can anyone please help?

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Christopher Tory over 5 years ago +1 suggested

The cache maintenance operations in ACE can be linked to the the cache maintenance operations executed by a master, such as an Arm processor. If we use the Arm Architecture as a reference, we can form...
Christopher Tory over 5 years ago in reply to Taniya Garg +1

It's an explicit decision by the programmer to execute an instruction that generates one of these instructions. If your target a cache maintenance instruction at a region of outer shareable memory, then...
amirovilivasso over 5 years ago in reply to Christopher Tory +1

for a region of outer shareable memory, all the masters in the Outer Shareable domain need to clean and invalidate this line if they have it. They know to do this by receiving a CleanInvalid snoop, which...

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0 Taniya Garg over 5 years ago in reply to amirovilivasso

Thank you for the reply. I understand that why the transaction is issued but how does the cache know the shareable domain of memory (supposedly main memory)?
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0 Taniya Garg over 5 years ago in reply to amirovilivasso

Thank you for the reply. I understand that why the transaction is issued but how does the cache know the shareable domain of memory (supposedly main memory)?
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0 Christopher Tory over 5 years ago in reply to Taniya Garg

In an Arm A-class CPU, this would be determined by the page tables - in other words, regions of memory will be defined with a specific shareability. When memory is loaded into the CPU cluster, it will be tagged with the shareability.
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0 Taniya Garg over 5 years ago in reply to Christopher Tory

Thank you for you reply. I have understood now>
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