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sherrellbc
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Can Cortex-A series ARM processors remap RAMthe physical address of DRAM via the Memory Controller?

Many ARM SoCs have memory as MMIO. However, I have seen other ARM processors that support (like x86, et. al.) the ability to program the memory controller and move this mapping.

Is this a SoC-dependent feature? Or is the ability linked with a particular ARM core IP? The the ability linked with a certain ARM core tier and above (for instance, all Cortex-A)? Or is it up to the SoC vendor to decide if remapping is supported in their Memory Controller?

Specifically, because I am working with A series:

  • Is memory remapping supported on Cortex-A and later?

I want to run some firmware that has memory mapped into a location that is not supported by the specific SoC I have, so I was curious to see if it can be moved.


Edit:

Fundamentally, I think the question I am asking is whether or not the presence of an MMU/Memory Controller implies the ability to remap the physical addresses of DRAM like you can on x86 hardware.

Can Cortex-A series ARM processors remap RAM via the Memory Controller?

Many ARM SoCs have memory as MMIO. However, I have seen other ARM processors that support (like x86, et. al.) the ability to program the memory controller and move this mapping.

Is this a SoC-dependent feature? Or is the ability linked with a particular ARM core IP? The the ability linked with a certain ARM core tier and above (for instance, all Cortex-A)? Or is it up to the SoC vendor to decide if remapping is supported in their Memory Controller?

Specifically, because I am working with A series:

  • Is memory remapping supported on Cortex-A and later?

I want to run some firmware that has memory mapped into a location that is not supported by the specific SoC I have, so I was curious to see if it can be moved.

Can Cortex-A series ARM processors remap the physical address of DRAM via the Memory Controller?

Many ARM SoCs have memory as MMIO. However, I have seen other ARM processors that support (like x86, et. al.) the ability to program the memory controller and move this mapping.

Is this a SoC-dependent feature? Or is the ability linked with a particular ARM core IP? The the ability linked with a certain ARM core tier and above (for instance, all Cortex-A)? Or is it up to the SoC vendor to decide if remapping is supported in their Memory Controller?

Specifically, because I am working with A series:

  • Is memory remapping supported on Cortex-A and later?

I want to run some firmware that has memory mapped into a location that is not supported by the specific SoC I have, so I was curious to see if it can be moved.


Edit:

Fundamentally, I think the question I am asking is whether or not the presence of an MMU/Memory Controller implies the ability to remap the physical addresses of DRAM like you can on x86 hardware.

Source Link
sherrellbc
  • 3.5k
  • 7
  • 37
  • 63

Can Cortex-A series ARM processors remap RAM via the Memory Controller?

Many ARM SoCs have memory as MMIO. However, I have seen other ARM processors that support (like x86, et. al.) the ability to program the memory controller and move this mapping.

Is this a SoC-dependent feature? Or is the ability linked with a particular ARM core IP? The the ability linked with a certain ARM core tier and above (for instance, all Cortex-A)? Or is it up to the SoC vendor to decide if remapping is supported in their Memory Controller?

Specifically, because I am working with A series:

  • Is memory remapping supported on Cortex-A and later?

I want to run some firmware that has memory mapped into a location that is not supported by the specific SoC I have, so I was curious to see if it can be moved.