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    remoteproc/keystone: Add a remoteproc driver for Keystone 2 DSPs · e88bb8f7
    Suman Anna authored
    
    
    The Texas Instrument's Keystone 2 family of SoCs has 1 or more
    TMS320C66x DSP Core Subsystems (C66x CorePacs). Each subsystem has
    a C66x Fixed/Floating-Point DSP Core, with 32KB of L1P and L1D SRAMs,
    that can be configured and partitioned as either RAM and/or Cache,
    and 1 MB of L2 SRAM. The CorePac also includes an Internal DMA (IDMA),
    External Memory Controller (EMC), Extended Memory Controller (XMC)
    with a Memory Protection and Address Extension (MPAX) unit, a Bandwidth
    Management (BWM) unit, an Interrupt Controller (INTC) and a Powerdown
    Controller (PDC).
    
    A new remoteproc module is added to perform the device management of
    these DSP devices. The driver expects the firmware names to be of the
    form "keystone-dsp<X>-fw", where X is the corresponding DSP number, and
    uses the standard remoteproc core ELF loader. The support is limited
    to images only using the DSP internal memories at the moment. This
    remoteproc driver is also designed to work with virtio, and uses the
    IPC Generation registers for performing the virtio signalling and
    getting notified of exceptions.
    
    The driver currently supports the 66AK2H/66AK2K, 66AK2L and 66AK2E
    SoCs.
    
    Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
    Signed-off-by: default avatarSam Nelson <sam.nelson@ti.com>
    Signed-off-by: default avatarAndrew F. Davis <afd@ti.com>
    Acked-by: default avatarSantosh Shilimkar <ssantosh@kernel.org>
    Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
    e88bb8f7