1 /* 2 * Arnewsh 5206 ColdFire system emulation. 3 * 4 * Copyright (c) 2007 CodeSourcery. 5 * 6 * This code is licensed under the GPL 7 */ 8 9 #include "hw/hw.h" 10 #include "hw/m68k/mcf.h" 11 #include "hw/boards.h" 12 #include "hw/loader.h" 13 #include "elf.h" 14 #include "exec/address-spaces.h" 15 #include "qemu/error-report.h" 16 #include "sysemu/qtest.h" 17 18 #define KERNEL_LOAD_ADDR 0x10000 19 #define AN5206_MBAR_ADDR 0x10000000 20 #define AN5206_RAMBAR_ADDR 0x20000000 21 22 /* Board init. */ 23 24 static void an5206_init(MachineState *machine) 25 { 26 ram_addr_t ram_size = machine->ram_size; 27 const char *cpu_model = machine->cpu_model; 28 const char *kernel_filename = machine->kernel_filename; 29 M68kCPU *cpu; 30 CPUM68KState *env; 31 int kernel_size; 32 uint64_t elf_entry; 33 hwaddr entry; 34 MemoryRegion *address_space_mem = get_system_memory(); 35 MemoryRegion *ram = g_new(MemoryRegion, 1); 36 MemoryRegion *sram = g_new(MemoryRegion, 1); 37 38 if (!cpu_model) { 39 cpu_model = "m5206"; 40 } 41 cpu = cpu_m68k_init(cpu_model); 42 if (!cpu) { 43 error_report("Unable to find m68k CPU definition"); 44 exit(1); 45 } 46 env = &cpu->env; 47 48 /* Initialize CPU registers. */ 49 env->vbr = 0; 50 /* TODO: allow changing MBAR and RAMBAR. */ 51 env->mbar = AN5206_MBAR_ADDR | 1; 52 env->rambar0 = AN5206_RAMBAR_ADDR | 1; 53 54 /* DRAM at address zero */ 55 memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size); 56 memory_region_add_subregion(address_space_mem, 0, ram); 57 58 /* Internal SRAM. */ 59 memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal); 60 vmstate_register_ram_global(sram); 61 memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram); 62 63 mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu); 64 65 /* Load kernel. */ 66 if (!kernel_filename) { 67 if (qtest_enabled()) { 68 return; 69 } 70 fprintf(stderr, "Kernel image must be specified\n"); 71 exit(1); 72 } 73 74 kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry, 75 NULL, NULL, 1, EM_68K, 0); 76 entry = elf_entry; 77 if (kernel_size < 0) { 78 kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL, 79 NULL, NULL); 80 } 81 if (kernel_size < 0) { 82 kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR, 83 ram_size - KERNEL_LOAD_ADDR); 84 entry = KERNEL_LOAD_ADDR; 85 } 86 if (kernel_size < 0) { 87 fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename); 88 exit(1); 89 } 90 91 env->pc = entry; 92 } 93 94 static void an5206_machine_init(MachineClass *mc) 95 { 96 mc->desc = "Arnewsh 5206"; 97 mc->init = an5206_init; 98 } 99 100 DEFINE_MACHINE("an5206", an5206_machine_init) 101