85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
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/*
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* debug exit port emulation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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#include "hw/isa/isa.h"
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#include "hw/qdev-properties.h"
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#include "qemu/module.h"
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#define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit"
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#define ISA_DEBUG_EXIT_DEVICE(obj) \
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OBJECT_CHECK(ISADebugExitState, (obj), TYPE_ISA_DEBUG_EXIT_DEVICE)
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typedef struct ISADebugExitState {
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ISADevice parent_obj;
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uint32_t iobase;
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uint32_t iosize;
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MemoryRegion io;
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} ISADebugExitState;
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static uint64_t debug_exit_read(void *opaque, hwaddr addr, unsigned size)
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{
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return 0;
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}
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static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned width)
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{
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exit((val << 1) | 1);
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}
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static const MemoryRegionOps debug_exit_ops = {
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.read = debug_exit_read,
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.write = debug_exit_write,
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.valid.min_access_size = 1,
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.valid.max_access_size = 4,
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.endianness = DEVICE_LITTLE_ENDIAN,
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};
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static void debug_exit_realizefn(DeviceState *d, Error **errp)
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{
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ISADevice *dev = ISA_DEVICE(d);
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ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(d);
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memory_region_init_io(&isa->io, OBJECT(dev), &debug_exit_ops, isa,
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TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize);
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memory_region_add_subregion(isa_address_space_io(dev),
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isa->iobase, &isa->io);
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}
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static Property debug_exit_properties[] = {
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DEFINE_PROP_UINT32("iobase", ISADebugExitState, iobase, 0x501),
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DEFINE_PROP_UINT32("iosize", ISADebugExitState, iosize, 0x02),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void debug_exit_class_initfn(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->realize = debug_exit_realizefn;
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device_class_set_props(dc, debug_exit_properties);
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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}
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static const TypeInfo debug_exit_info = {
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.name = TYPE_ISA_DEBUG_EXIT_DEVICE,
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.parent = TYPE_ISA_DEVICE,
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.instance_size = sizeof(ISADebugExitState),
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.class_init = debug_exit_class_initfn,
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};
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static void debug_exit_register_types(void)
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{
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type_register_static(&debug_exit_info);
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}
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type_init(debug_exit_register_types)
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