DMA memory allocation in bootloaders

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  Hi all,

   I'm working on a bootloader. How the DMA buffers are allocated/managed in a bootloader environment? How the Phys to Bus and Bus to phys memory conversion is done? Is the Physical memory is 1-1 with bus? Any pointer or sample code on memory handling in bootloader will be of great help.

Thanks,
Saumendra Dash

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