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