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 "cpu.h" 12 #include "hw/m68k/mcf.h" 13 #include "hw/boards.h" 14 #include "hw/loader.h" 15 #include "elf.h" 16 #include "exec/address-spaces.h" 17 #include "qemu/error-report.h" 18 #include "sysemu/qtest.h" 19 20 #define KERNEL_LOAD_ADDR 0x10000 21 #define AN5206_MBAR_ADDR 0x10000000 22 #define AN5206_RAMBAR_ADDR 0x20000000 23 24 /* Board init. */ 25 26 static void an5206_init(MachineState *machine) 27 { 28 ram_addr_t ram_size = machine->ram_size; 29 const char *kernel_filename = machine->kernel_filename; 30 M68kCPU *cpu; 31 CPUM68KState *env; 32 int kernel_size; 33 uint64_t elf_entry; 34 hwaddr entry; 35 MemoryRegion *address_space_mem = get_system_memory(); 36 MemoryRegion *ram = g_new(MemoryRegion, 1); 37 MemoryRegion *sram = g_new(MemoryRegion, 1); 38 39 cpu = M68K_CPU(cpu_create(machine->cpu_type)); 40 env = &cpu->env; 41 42 /* Initialize CPU registers. */ 43 env->vbr = 0; 44 /* TODO: allow changing MBAR and RAMBAR. */ 45 env->mbar = AN5206_MBAR_ADDR | 1; 46 env->rambar0 = AN5206_RAMBAR_ADDR | 1; 47 48 /* DRAM at address zero */ 49 memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size); 50 memory_region_add_subregion(address_space_mem, 0, ram); 51 52 /* Internal SRAM. */ 53 memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal); 54 memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram); 55 56 mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu); 57 58 /* Load kernel. */ 59 if (!kernel_filename) { 60 if (qtest_enabled()) { 61 return; 62 } 63 error_report("Kernel image must be specified"); 64 exit(1); 65 } 66 67 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry, 68 NULL, NULL, NULL, 1, EM_68K, 0, 0); 69 entry = elf_entry; 70 if (kernel_size < 0) { 71 kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL, 72 NULL, NULL); 73 } 74 if (kernel_size < 0) { 75 kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR, 76 ram_size - KERNEL_LOAD_ADDR); 77 entry = KERNEL_LOAD_ADDR; 78 } 79 if (kernel_size < 0) { 80 error_report("Could not load kernel '%s'", kernel_filename); 81 exit(1); 82 } 83 84 env->pc = entry; 85 } 86 87 static void an5206_machine_init(MachineClass *mc) 88 { 89 mc->desc = "Arnewsh 5206"; 90 mc->init = an5206_init; 91 mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5206"); 92 } 93 94 DEFINE_MACHINE("an5206", an5206_machine_init) 95