• Eugeniy Paltsev's avatar
    ARC: [plat-hsdk]: allow to switch between AXI DMAC port configurations · ce0eff0d
    Eugeniy Paltsev authored
    We want to use DW AXI DMAC on HSDK board in our automated verification
    to test cache & dma kernel code changes. This is perfect candidate
    as we don't depend on any external peripherals like MMC card / USB
    storage / etc.
    To increase test coverage we want to test both options:
     * DW AXI DMAC is connected through IOC port & dma direct ops used
     * DW AXI DMAC is connected to DDR port & dma noncoherent ops used
    
    Introduce 'arc_hsdk_axi_dmac_coherent' global variable which can be
    modified by debugger (same way as we patch 'ioc_enable') to switch
    between these options without recompiling the kernel.
    Depend on this value we tweak memory bridge configuration and
    "dma-coherent" DTS property of DW AXI DMAC.
    Signed-off-by: default avatarEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
    Acked-by: default avatarAlexey Brodkin <abrodkin@synopsys.com>
    Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
    ce0eff0d
Makefile 442 Bytes