LXR qemu/hw/misc/debugexit.c

   1/*
   2 * debug exit port emulation
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License as
   6 * published by the Free Software Foundation; either version 2 or
   7 * (at your option) any later version.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "hw/hw.h"
  12#include "hw/isa/isa.h"
  13
  14#define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit"
  15#define ISA_DEBUG_EXIT_DEVICE(obj) \
  16     OBJECT_CHECK(ISADebugExitState, (obj), TYPE_ISA_DEBUG_EXIT_DEVICE)
  17
  18typedef struct ISADebugExitState {
  19    ISADevice parent_obj;
  20
  21    uint32_t iobase;
  22    uint32_t iosize;
  23    MemoryRegion io;
  24} ISADebugExitState;
  25
  26static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val,
  27                             unsigned width)
  28{
  29    exit((val << 1) | 1);
  30}
  31
  32static const MemoryRegionOps debug_exit_ops = {
  33    .write = debug_exit_write,
  34    .valid.min_access_size = 1,
  35    .valid.max_access_size = 4,
  36    .endianness = DEVICE_LITTLE_ENDIAN,
  37};
  38
  39static void debug_exit_realizefn(DeviceState *d, Error **errp)
  40{
  41    ISADevice *dev = ISA_DEVICE(d);
  42    ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(d);
  43
  44    memory_region_init_io(&isa->io, OBJECT(dev), &debug_exit_ops, isa,
  45                          TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize);
  46    memory_region_add_subregion(isa_address_space_io(dev),
  47                                isa->iobase, &isa->io);
  48}
  49
  50static Property debug_exit_properties[] = {
  51    DEFINE_PROP_UINT32("iobase", ISADebugExitState, iobase, 0x501),
  52    DEFINE_PROP_UINT32("iosize", ISADebugExitState, iosize, 0x02),
  53    DEFINE_PROP_END_OF_LIST(),
  54};
  55
  56static void debug_exit_class_initfn(ObjectClass *klass, void *data)
  57{
  58    DeviceClass *dc = DEVICE_CLASS(klass);
  59
  60    dc->realize = debug_exit_realizefn;
  61    dc->props = debug_exit_properties;
  62    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  63}
  64
  65static const TypeInfo debug_exit_info = {
  66    .name          = TYPE_ISA_DEBUG_EXIT_DEVICE,
  67    .parent        = TYPE_ISA_DEVICE,
  68    .instance_size = sizeof(ISADebugExitState),
  69    .class_init    = debug_exit_class_initfn,
  70};
  71
  72static void debug_exit_register_types(void)
  73{
  74    type_register_static(&debug_exit_info);
  75}
  76
  77type_init(debug_exit_register_types)
  78