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f5095aa3 PM |
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 | ||
a27bd6c7 | 11 | #include "hw/qdev-properties.h" |
8f7b1bd6 | 12 | #include "hw/sysbus.h" |
3e80f690 | 13 | #include "qapi/error.h" |
db1015e9 | 14 | #include "qom/object.h" |
8f7b1bd6 | 15 | |
f5095aa3 PM |
16 | #define TYPE_UNIMPLEMENTED_DEVICE "unimplemented-device" |
17 | ||
8063396b | 18 | OBJECT_DECLARE_SIMPLE_TYPE(UnimplementedDeviceState, UNIMPLEMENTED_DEVICE) |
a7bc4ee5 | 19 | |
db1015e9 | 20 | struct UnimplementedDeviceState { |
a7bc4ee5 PM |
21 | SysBusDevice parent_obj; |
22 | MemoryRegion iomem; | |
55d35c88 | 23 | unsigned offset_fmt_width; |
a7bc4ee5 PM |
24 | char *name; |
25 | uint64_t size; | |
db1015e9 | 26 | }; |
a7bc4ee5 | 27 | |
f5095aa3 PM |
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 | { | |
3e80f690 | 45 | DeviceState *dev = qdev_new(TYPE_UNIMPLEMENTED_DEVICE); |
f5095aa3 PM |
46 | |
47 | qdev_prop_set_string(dev, "name", name); | |
48 | qdev_prop_set_uint64(dev, "size", size); | |
3c6ef471 | 49 | sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); |
f5095aa3 PM |
50 | |
51 | sysbus_mmio_map_overlap(SYS_BUS_DEVICE(dev), 0, base, -1000); | |
52 | } | |
53 | ||
54 | #endif |