• Stephen Warren's avatar
    Create API to map between CPU physical and bus addresses · 927c1fa2
    Stephen Warren authored
    On some SoCs, DMA-capable peripherals see a different address space to
    the CPU's physical address space. Create an API to allow platform-agnostic
    drivers to convert between the two address spaces when programming DMA
    This API will exist on all platforms, but will have a dummy implementation
    when this feature is not required. Other platforms will enable
    CONFIG_PHYS_TO_BUS and provide the required implementation.
    Signed-off-by: default avatarStephen Warren <swarren@wwwdotorg.org>
phys2bus.h 421 Bytes