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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 | ||
8f7b1bd6 PMD |
11 | #include "hw/sysbus.h" |
12 | ||
f5095aa3 PM |
13 | #define TYPE_UNIMPLEMENTED_DEVICE "unimplemented-device" |
14 | ||
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15 | #define UNIMPLEMENTED_DEVICE(obj) \ |
16 | OBJECT_CHECK(UnimplementedDeviceState, (obj), TYPE_UNIMPLEMENTED_DEVICE) | |
17 | ||
18 | typedef struct { | |
19 | SysBusDevice parent_obj; | |
20 | MemoryRegion iomem; | |
21 | char *name; | |
22 | uint64_t size; | |
23 | } UnimplementedDeviceState; | |
24 | ||
f5095aa3 PM |
25 | /** |
26 | * create_unimplemented_device: create and map a dummy device | |
27 | * @name: name of the device for debug logging | |
28 | * @base: base address of the device's MMIO region | |
29 | * @size: size of the device's MMIO region | |
30 | * | |
31 | * This utility function creates and maps an instance of unimplemented-device, | |
32 | * which is a dummy device which simply logs all guest accesses to | |
33 | * it via the qemu_log LOG_UNIMP debug log. | |
34 | * The device is mapped at priority -1000, which means that you can | |
35 | * use it to cover a large region and then map other devices on top of it | |
36 | * if necessary. | |
37 | */ | |
38 | static inline void create_unimplemented_device(const char *name, | |
39 | hwaddr base, | |
40 | hwaddr size) | |
41 | { | |
42 | DeviceState *dev = qdev_create(NULL, TYPE_UNIMPLEMENTED_DEVICE); | |
43 | ||
44 | qdev_prop_set_string(dev, "name", name); | |
45 | qdev_prop_set_uint64(dev, "size", size); | |
46 | qdev_init_nofail(dev); | |
47 | ||
48 | sysbus_mmio_map_overlap(SYS_BUS_DEVICE(dev), 0, base, -1000); | |
49 | } | |
50 | ||
51 | #endif |