Basic Memory Mapping in SoC

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Memory map or Address map gives information regarding how much address locations that a processor can access. The memory map shown below is taken from the ARM principles of Memory map whitepaper. Figure 1 shows a memory map or an address map organization for a typical SoC.
Figure 1: 32-bit memory map 


Figure 2: Versatile version of the 32bit ARM CPU Memory map
Address map consists of
  • Boot ROM: This Boot ROM address region for ARM CPU 32bit to start from 0x0000_0000 or 0xFFFF_0000
  • ROM, RAM, SoC I/O: This address region is recommended to align with 64KB and consists of Internal ROM, SRAM, static memory, SoC peripheral registers 
  • Mapped I/O and additional SoC I/O: Address region of mapped I/O like PCIe
  • DRAM address space: The address space recommended for DRAM should be contiguous and needs to  be placed near the high address region  of the memory map  
Reference:
[1] Principles of ARM Memory Maps [White Paper]

Comments

  1. DineshFebruary 24, 2020 at 6:53 PM

    How SoC memory mapping is done and who decides the address for the peripherals/controllers within the SoC?

    ReplyDelete

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