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 /** 16 * create_unimplemented_device: create and map a dummy device 17 * @name: name of the device for debug logging 18 * @base: base address of the device's MMIO region 19 * @size: size of the device's MMIO region 20 * 21 * This utility function creates and maps an instance of unimplemented-device, 22 * which is a dummy device which simply logs all guest accesses to 23 * it via the qemu_log LOG_UNIMP debug log. 24 * The device is mapped at priority -1000, which means that you can 25 * use it to cover a large region and then map other devices on top of it 26 * if necessary. 27 */ 28 static inline void create_unimplemented_device(const char *name, 29 hwaddr base, 30 hwaddr size) 31 { 32 DeviceState *dev = qdev_create(NULL, TYPE_UNIMPLEMENTED_DEVICE); 33 34 qdev_prop_set_string(dev, "name", name); 35 qdev_prop_set_uint64(dev, "size", size); 36 qdev_init_nofail(dev); 37 38 sysbus_mmio_map_overlap(SYS_BUS_DEVICE(dev), 0, base, -1000); 39 } 40 41 #endif 42