• Nishanth Menon's avatar
    drivers: Introduce a simplified remoteproc framework · ddf56bc7
    Nishanth Menon authored
    Many System on Chip(SoC) solutions are complex with multiple processors
    on the same die dedicated to either general purpose of specialized
    functions. Many examples do exist in today's SoCs from various vendors.
    Typical examples are micro controllers such as an ARM M3/M0 doing a
    offload of specific function such as event integration or power
    management or controlling camera etc.
    Traditionally, the responsibility of loading up such a processor with a
    firmware and communication has been with a High Level Operating
    System(HLOS) such as Linux. However, there exists classes of products
    where Linux would need to expect services from such a processor or the
    delay of Linux and operating system being able to load up such a
    firmware is unacceptable.
    To address these needs, we need some minimal capability to load such a
    system and ensure it is started prior to an Operating System(Linux or
    any other) is started up.
    NOTE: This is NOT meant to be a solve-all solution, instead, it tries to
    address certain class of SoCs and products that need such a solution.
    A very simple model is introduced here as part of the initial support
    that supports microcontrollers with internal memory (no MMU, no
    execution from external memory, or specific image format needs). This
    basic framework can then (hopefully) be extensible to other complex SoC
    processor support as need be.
    Reviewed-by: default avatarSimon Glass <sjg@chromium.org>
    Signed-off-by: default avatarNishanth Menon <nm@ti.com>
    Acked-by: default avatarSimon Glass <sjg@chromium.org>
remoteproc-framework.txt 5.07 KB