| 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/core/qdev-properties.h" |
| 12 | #include "hw/core/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 |