[okl4-developer] Physical Memory & Virtual Memory

[Kumar Sanghvi]

Hi All,

I have some very basic / fundamental (may even sound silly) questions:-

How do we determine the values for the following variables in the
platform/SoCXX/tools/machines.py file:-

1) memory[physical]  .. This value I believe corresponds to RAM (silly
question) and probably can be obtained by consulting the TRM of SoCXX. But
still, any advise would be helpful.
2) memory[virtual] ... how this value is determined for any particular
SoCXX?
3) base_vaddr ... again here, how this value is determined for any
particular SoCXX?

4) Based on above values, final memory layout will be reflected in the
image.elf file generated. But any basic explanation related to this would be
helpful.
5) Also, based on above values, the parameters that we pass to u-boot will
also change.

For e.g. consider that an SoCXX has 512MB RAM with address range as : 0x8000
0000 - 0x9FFF FFFF
How do we determine the values of above variables based on this information?

Thanks to all,
Kumar.
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