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/qdev-properties.h" 12 #include "hw/sysbus.h" 13 14 #define TYPE_UNIMPLEMENTED_DEVICE "unimplemented-device" 15 16 #define UNIMPLEMENTED_DEVICE(obj) \ 17 OBJECT_CHECK(UnimplementedDeviceState, (obj), TYPE_UNIMPLEMENTED_DEVICE) 18 19 typedef struct { 20 SysBusDevice parent_obj; 21 MemoryRegion iomem; 22 char *name; 23 uint64_t size; 24 } UnimplementedDeviceState; 25 26 /** 27 * create_unimplemented_device: create and map a dummy device 28 * @name: name of the device for debug logging 29 * @base: base address of the device's MMIO region 30 * @size: size of the device's MMIO region 31 * 32 * This utility function creates and maps an instance of unimplemented-device, 33 * which is a dummy device which simply logs all guest accesses to 34 * it via the qemu_log LOG_UNIMP debug log. 35 * The device is mapped at priority -1000, which means that you can 36 * use it to cover a large region and then map other devices on top of it 37 * if necessary. 38 */ 39 static inline void create_unimplemented_device(const char *name, 40 hwaddr base, 41 hwaddr size) 42 { 43 DeviceState *dev = qdev_create(NULL, TYPE_UNIMPLEMENTED_DEVICE); 44 45 qdev_prop_set_string(dev, "name", name); 46 qdev_prop_set_uint64(dev, "size", size); 47 qdev_init_nofail(dev); 48 49 sysbus_mmio_map_overlap(SYS_BUS_DEVICE(dev), 0, base, -1000); 50 } 51 52 #endif 53