qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq, const char *kernel_filename, const char *cpu_model) { ARMCPU *cpu; CPUARMState *env; DeviceState *nvic; qemu_irq *pic = g_new(qemu_irq, num_irq); int image_size; uint64_t entry; uint64_t lowaddr; int i; int big_endian; MemoryRegion *hack = g_new(MemoryRegion, 1); if (cpu_model == NULL) { cpu_model = "cortex-m3"; } cpu = cpu_arm_init(cpu_model); if (cpu == NULL) { fprintf(stderr, "Unable to find CPU definition\n"); exit(1); } env = &cpu->env; armv7m_bitband_init(); nvic = qdev_create(NULL, "armv7m_nvic"); qdev_prop_set_uint32(nvic, "num-irq", num_irq); env->nvic = nvic; qdev_init_nofail(nvic); sysbus_connect_irq(SYS_BUS_DEVICE(nvic), 0, qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_IRQ)); for (i = 0; i < num_irq; i++) { pic[i] = qdev_get_gpio_in(nvic, i); } #ifdef TARGET_WORDS_BIGENDIAN big_endian = 1; #else big_endian = 0; #endif if (!kernel_filename && !qtest_enabled()) { fprintf(stderr, "Guest image must be specified (using -kernel)\n"); exit(1); } if (kernel_filename) { image_size = load_elf(kernel_filename, NULL, NULL, &entry, &lowaddr, NULL, big_endian, ELF_MACHINE, 1); if (image_size < 0) { image_size = load_image_targphys(kernel_filename, 0, mem_size); lowaddr = 0; } if (image_size < 0) { error_report("Could not load kernel '%s'", kernel_filename); exit(1); } } /* Hack to map an additional page of ram at the top of the address space. This stops qemu complaining about executing code outside RAM when returning from an exception. */ memory_region_init_ram(hack, NULL, "armv7m.hack", 0x1000, &error_abort); vmstate_register_ram_global(hack); memory_region_add_subregion(system_memory, 0xfffff000, hack); qemu_register_reset(armv7m_reset, cpu); return pic; }