Intel EMIF FPGA IP DTS / DTB error.

looks like the system not recognize any driver for emif. But seem like you only need to access the FPGA EMIF from HPS as a flat memory, maybe you can try to modify the DTS to flat memory as below. See if you still can access the address from HPS.

// emif_0_ecc_core: unknown@0x100000040 {

// compatible = "unknown,unknown-16.1";

// reg = <0x00000001 0x00000040 0x40000000>;

// clocks = <&emif_0_arch 0>;

// }; //end unknown@0x100000040 (emif_0_ecc_core)

memory {

device_type = "memory";

reg = <0xc0000000 0x20000000>;

};