• Alexey Brodkin's avatar
    ARC: [axs10x] Specify reserved memory for frame buffer · cb2ad5e5
    Alexey Brodkin authored
    Allocation of a frame buffer memory in a special memory region
    allows bypassing of so-called IO Coherency aperture
    which is typically set as a range 0x8z-0xAz.
    
    I.e. all data traffic to PGU bypasses IO Coherency block
    and saves its bandwidth for other peripherals.
    
    Even though for AXS101 (which sorts ARC770 CPU) IOC is not
    an option for a sake of keeping one DT description for the
    base-board (axs10x_mb.dtsi) we're still defining reserved
    memory location in the very end of DDR.
    Signed-off-by: default avatarAlexey Brodkin <abrodkin@synopsys.com>
    Acked-by: default avatarVineet Gupta <vgupta@synopsys.com>
    Cc: devicetree@vger.kernel.org
    cb2ad5e5
axs10x_mb.dtsi 6.22 KB