Hi, I would like to instantiate two CPU on a XILINX board (FX100T). These two CPU shall have their own memory device (one DDR ram and one internal "xpr" RAM each) with addresses overlapping (0 to 0xFFFFFFFF each).
Here is a snapshot of machine initialization routine working with one CPU : memory_region_allocate_system_memory(ddr_ram, NULL, "ram", ram_size); memory_region_add_subregion(get_system_memory(), 0x0, ddr_ram); memory_region_init_ram(xpr_bram, NULL, "xpr_bram", 0x10000); memory_region_add_subregion(get_system_memory(), 0xFFFF0000, xpr_bram); load_elf(machine->firmware, NULL, NULL, &entry,&lowaddr, &highaddr, 1, ELF_MACHINE, 0); Since, region is attached to get_system_memory() and that nothing is given to load_elf to map elf element to correct address space I can't figure out how I could have my two CPU working on different address space, using same range of address, either for instantiation of memory or elf loading. In other words I would like to do this : /////////////////////////// //CPU0 memory_region_allocate_system_memory(ddr_ram0, NULL, "ram0", ram0_size); memory_region_add_subregion(CPU0_SYSTEM_MEMORY, 0x0, ddr_ram0); memory_region_init_ram(xpr_bram0, NULL, "xpr_bram0", 0x10000); memory_region_add_subregion(CPU0_SYSTEM_MEMORY, 0xFFFF0000, xpr_bram0); //magically load elf in CPU0_SYSTEM_MEMORY load_elf(machine->firmware0, NULL, NULL, &entry,&lowaddr, &highaddr, 1, ELF_MACHINE, 0); ///////////////////////////// //CPU1 memory_region_allocate_system_memory(ddr_ram1, NULL, "ram1", ram1_size); memory_region_add_subregion(CPU1_SYSTEM_MEMORY, 0x0, ddr_ram1); memory_region_init_ram(xpr_bram1, NULL, "xpr_bram1", 0x10000); memory_region_add_subregion(CPU1_SYSTEM_MEMORY, 0xFFFF0000, xpr_bram1); //magically load elf in CPU1_SYSTEM_MEMORY load_elf(machine->firmware, NULL, NULL, &entry,&lowaddr, &highaddr, 1, ELF_MACHINE, 0); // Attach CPUX_SYSTEM_MEMORY to CPUX so that they end up using correct memory Thanks for your suggestion ! Pierre
