Address Translation

Virtual addresses used by software are converted to physical addresses by the CPU's Memory Management Unit (MMU) before being sent to the system bus.

mmu-mx.png

The MMU on PIC32MX devices with the MIPS® M4K® core performs the following translations:

  • Fixed Mapping Translation (FMT) on KSEG0/KSEG1
    • Physical Address = (Virtual Address) AND (0x1FFFFFFF)
​
  • Please refer to the PIC32MX FRM "Section 3. Memory Organization" for detailed coverage on the FMT.
  • Also, see chapter 6 of the "See MIPS Run" book for a good discussion on low-level memory management in MIPS CPUs.

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