1 /* 2 * "Unimplemented" device 3 * 4 * Copyright Linaro Limited, 2017 5 * Written by Peter Maydell 6 */ 7 8 #ifndef HW_MISC_UNIMP_H 9 #define HW_MISC_UNIMP_H 10 11 #include "hw/sysbus.h" 12 13 #define TYPE_UNIMPLEMENTED_DEVICE "unimplemented-device" 14 15 #define UNIMPLEMENTED_DEVICE(obj) \ 16 OBJECT_CHECK(UnimplementedDeviceState, (obj), TYPE_UNIMPLEMENTED_DEVICE) 17 18 typedef struct { 19 SysBusDevice parent_obj; 20 MemoryRegion iomem; 21 char *name; 22 uint64_t size; 23 } UnimplementedDeviceState; 24 25 /** 26 * create_unimplemented_device: create and map a dummy device 27 * @name: name of the device for debug logging 28 * @base: base address of the device's MMIO region 29 * @size: size of the device's MMIO region 30 * 31 * This utility function creates and maps an instance of unimplemented-device, 32 * which is a dummy device which simply logs all guest accesses to 33 * it via the qemu_log LOG_UNIMP debug log. 34 * The device is mapped at priority -1000, which means that you can 35 * use it to cover a large region and then map other devices on top of it 36 * if necessary. 37 */ 38 static inline void create_unimplemented_device(const char *name, 39 hwaddr base, 40 hwaddr size) 41 { 42 DeviceState *dev = qdev_create(NULL, TYPE_UNIMPLEMENTED_DEVICE); 43 44 qdev_prop_set_string(dev, "name", name); 45 qdev_prop_set_uint64(dev, "size", size); 46 qdev_init_nofail(dev); 47 48 sysbus_mmio_map_overlap(SYS_BUS_DEVICE(dev), 0, base, -1000); 49 } 50 51 #endif 52