Hi, Now I am debugging the board which use Marvell 5182 core, which core is arm9, but I can not seem any information from Serial port. I have traced the code with GPIO LED port, from that I can seem there are something wrong in DDR RAM, maybe hardware. Since the arm core use memory to init all the decide: init_fnc_t *init_sequence[] = { cpu_init, /* basic cpu dependent setup */ board_init, /* basic board dependent setup */ interrupt_init, /* set up exceptions */ env_init, /* initialize environment */ init_baudrate, /* initialze baudrate settings */ serial_init, /* serial communications setup */ console_init_f, /* stage 1 init of console */ display_banner, /* say that we are here */ dram_init, /* configure available RAM banks */ #ifndef CONFIG_MARVELL display_dram_config, #endif #if defined(CONFIG_VCMA9) checkboard, #endif NULL, }; in function start_armboot But in powerpc the code use DCache to run the init part, so that even if the ram does not work normally, we can see information from serial port, could it run in arm core 5182 system. If yes, how to change that.
Could wolf or some other expert answer my questions? Thanks much! Best Wishes Jack Zhao USI SH R&D Center 86-021-58966996-1122