LXR qemu/include/hw/misc/unimp.h

   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#define UNIMPLEMENTED_DEVICE(obj) \
  16    OBJECT_CHECK(UnimplementedDeviceState, (obj), TYPE_UNIMPLEMENTED_DEVICE)
  17
  18typedef struct {
  19    SysBusDevice parent_obj;
  20    MemoryRegion iomem;
  21    char *name;
  22    uint64_t size;
  23} UnimplementedDeviceState;
  24
  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 */
  38static 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
  52