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Redesign the memory mapping hierarchy

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Assignment:

  1. Suppose you were given the opportunity to redesign the memory mapping hierarchy for a new CPU. We have seen that 4 KB pages seem a little small. Suppose you made the pages 217 = 131072 bytes.
    1. How many 64-bit addresses would fit on such a page? Example from book: 4096-byte page = 212 and 8-byte address = 23, so 212/23 = 29 = 512.
    2. How many bits would be required for the addressing of the page table?
    3. How would you break up the bit fields of the virtual addresses?
  2. Suppose a virtual memory address is 0x123456789012. Divide this address into the 4 different page table parts and the page offset.
  3. Suppose a virtual memory address is 0x123456789012. Suppose this happens to be an address within a 2 MB page. What is the page offset for this address?

Reference no: EM133269711

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