unimp.h (1586B)
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 #include "qapi/error.h" 14 #include "qom/object.h" 15 16 #define TYPE_UNIMPLEMENTED_DEVICE "unimplemented-device" 17 18 OBJECT_DECLARE_SIMPLE_TYPE(UnimplementedDeviceState, UNIMPLEMENTED_DEVICE) 19 20 struct UnimplementedDeviceState { 21 SysBusDevice parent_obj; 22 MemoryRegion iomem; 23 unsigned offset_fmt_width; 24 char *name; 25 uint64_t size; 26 }; 27 28 /** 29 * create_unimplemented_device: create and map a dummy device 30 * @name: name of the device for debug logging 31 * @base: base address of the device's MMIO region 32 * @size: size of the device's MMIO region 33 * 34 * This utility function creates and maps an instance of unimplemented-device, 35 * which is a dummy device which simply logs all guest accesses to 36 * it via the qemu_log LOG_UNIMP debug log. 37 * The device is mapped at priority -1000, which means that you can 38 * use it to cover a large region and then map other devices on top of it 39 * if necessary. 40 */ 41 static inline void create_unimplemented_device(const char *name, 42 hwaddr base, 43 hwaddr size) 44 { 45 DeviceState *dev = qdev_new(TYPE_UNIMPLEMENTED_DEVICE); 46 47 qdev_prop_set_string(dev, "name", name); 48 qdev_prop_set_uint64(dev, "size", size); 49 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); 50 51 sysbus_mmio_map_overlap(SYS_BUS_DEVICE(dev), 0, base, -1000); 52 } 53 54 #endif