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 "qemu/osdep.h" 10 #include "qapi/error.h" 11 #include "qemu-common.h" 12 #include "cpu.h" 13 #include "hw/hw.h" 14 #include "hw/m68k/mcf.h" 15 #include "hw/boards.h" 16 #include "hw/loader.h" 17 #include "elf.h" 18 #include "exec/address-spaces.h" 19 #include "qemu/error-report.h" 20 #include "sysemu/qtest.h" 21 22 #define KERNEL_LOAD_ADDR 0x10000 23 #define AN5206_MBAR_ADDR 0x10000000 24 #define AN5206_RAMBAR_ADDR 0x20000000 25 26 /* Board init. */ 27 28 static void an5206_init(MachineState *machine) 29 { 30 ram_addr_t ram_size = machine->ram_size; 31 const char *cpu_model = machine->cpu_model; 32 const char *kernel_filename = machine->kernel_filename; 33 M68kCPU *cpu; 34 CPUM68KState *env; 35 int kernel_size; 36 uint64_t elf_entry; 37 hwaddr entry; 38 MemoryRegion *address_space_mem = get_system_memory(); 39 MemoryRegion *ram = g_new(MemoryRegion, 1); 40 MemoryRegion *sram = g_new(MemoryRegion, 1); 41 42 if (!cpu_model) { 43 cpu_model = "m5206"; 44 } 45 cpu = cpu_m68k_init(cpu_model); 46 if (!cpu) { 47 error_report("Unable to find m68k CPU definition"); 48 exit(1); 49 } 50 env = &cpu->env; 51 52 /* Initialize CPU registers. */ 53 env->vbr = 0; 54 /* TODO: allow changing MBAR and RAMBAR. */ 55 env->mbar = AN5206_MBAR_ADDR | 1; 56 env->rambar0 = AN5206_RAMBAR_ADDR | 1; 57 58 /* DRAM at address zero */ 59 memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size); 60 memory_region_add_subregion(address_space_mem, 0, ram); 61 62 /* Internal SRAM. */ 63 memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal); 64 memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram); 65 66 mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu); 67 68 /* Load kernel. */ 69 if (!kernel_filename) { 70 if (qtest_enabled()) { 71 return; 72 } 73 fprintf(stderr, "Kernel image must be specified\n"); 74 exit(1); 75 } 76 77 kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry, 78 NULL, NULL, 1, EM_68K, 0, 0); 79 entry = elf_entry; 80 if (kernel_size < 0) { 81 kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL, 82 NULL, NULL); 83 } 84 if (kernel_size < 0) { 85 kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR, 86 ram_size - KERNEL_LOAD_ADDR); 87 entry = KERNEL_LOAD_ADDR; 88 } 89 if (kernel_size < 0) { 90 fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename); 91 exit(1); 92 } 93 94 env->pc = entry; 95 } 96 97 static void an5206_machine_init(MachineClass *mc) 98 { 99 mc->desc = "Arnewsh 5206"; 100 mc->init = an5206_init; 101 } 102 103 DEFINE_MACHINE("an5206", an5206_machine_init) 104