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Onboard Ethernet on CPU1

Former Member

Hi, I'm currently having issues getting the onboard 88E1518 running correctly on CPU1 while Linux is running on CPU0. The code I have written for CPU1 works correctly when run alone, but when running alongside Linux it is unable to initialize the ethernet. Everything works until it tries to setup the PHY, but gets caught in an infinite loop waiting for the PHY to be idling. I'm not sure what is causing the PHY to be busy, I've removed networking from u-boot and Ethernet from the devicetree for Linux. I've also changed all entries pertaining to the onboard Ethernet to no in the kernel config for Linux, although I did need to set config_mii to yes so that my USB Ethernet adapter would work in Linux.

Any help would be greatly appreciated,

Thanks!

  • 0

    1uFF1ADisable networking in menuconfig
    2uFF1Aenable clock in by add "clk_prepare" and "clk_enable" for GEM0_CLK in function zynq_clock_init() in drivers/clk/zynq/clk.c:
    clk = clk_register_zynq_gd2m("GEM0_CLK",
                            (void __iomem *)SLCR_GEM0_CLK_CTRL, gem_parents, 8,
                            &gem0clk_lock);
            clk_prepare(clk);
            clk_enable(clk);
            zynq_clkdev_add(NULL, "GEM0", clk);

    clk = clk_register_gate(NULL, "GEM0_CPU1X", "CPU_1X_CLK", 0,
                            (void __iomem *)SLCR_APER_CLK_CTRL, 6, 0,
                            &aperclk_lock);
            clk_prepare(clk);
            clk_enable(clk);
            zynq_clkdev_add(NULL, "GEM0_APER", clk);

    3uFF1Adelete ethernet info in DTS

    4uFF1Aedit bootargs in DTS by adding "maxcpus=1"

    5uFF1Aedit scugic BSP code for scugic:
    C:Xilinx14.4ISE_DSEDKswXilinxProcessorIPLibdriversscugic_v1_02_asrcxscugic_hw.c
             target the ethernet interrupt to CPU1 in DistInit
             #if USE_AMP==1
             #warning "Building GIC for AMP"

             /*
             * The distrubutor should not be initialized by FreeRTOS in the case of
             * AMP -- it is assumed that Linux is the master of this device in that
             * case.
             */
             XScuGic_WriteReg(Config->DistBaseAddress, XSCUGIC_DIST_EN_OFFSET, 0UL);
           
             /*The target*/
             reg = XScuGic_ReadReg(Config->DistBaseAddress, 0x834);
             reg &= 0xff00ffff;
             reg |= 0x00020000;
             XScuGic_WriteReg(Config->DistBaseAddress, 0x834, reg);
           
             XScuGic_WriteReg(Config->DistBaseAddress, XSCUGIC_DIST_EN_OFFSET,
                                                                     XSCUGIC_EN_INT_MASK);
           
             return;
    #endif