qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

debugexit.c (2352B)

      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/isa/isa.h"
     12 #include "hw/qdev-properties.h"
     13 #include "qemu/module.h"
     14 #include "qom/object.h"
     15 
     16 #define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit"
     17 OBJECT_DECLARE_SIMPLE_TYPE(ISADebugExitState, ISA_DEBUG_EXIT_DEVICE)
     18 
     19 struct ISADebugExitState {
     20     ISADevice parent_obj;
     21 
     22     uint32_t iobase;
     23     uint32_t iosize;
     24     MemoryRegion io;
     25 };
     26 
     27 static uint64_t debug_exit_read(void *opaque, hwaddr addr, unsigned size)
     28 {
     29     return 0;
     30 }
     31 
     32 static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val,
     33                              unsigned width)
     34 {
     35     exit((val << 1) | 1);
     36 }
     37 
     38 static const MemoryRegionOps debug_exit_ops = {
     39     .read = debug_exit_read,
     40     .write = debug_exit_write,
     41     .valid.min_access_size = 1,
     42     .valid.max_access_size = 4,
     43     .endianness = DEVICE_LITTLE_ENDIAN,
     44 };
     45 
     46 static void debug_exit_realizefn(DeviceState *d, Error **errp)
     47 {
     48     ISADevice *dev = ISA_DEVICE(d);
     49     ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(d);
     50 
     51     memory_region_init_io(&isa->io, OBJECT(dev), &debug_exit_ops, isa,
     52                           TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize);
     53     memory_region_add_subregion(isa_address_space_io(dev),
     54                                 isa->iobase, &isa->io);
     55 }
     56 
     57 static Property debug_exit_properties[] = {
     58     DEFINE_PROP_UINT32("iobase", ISADebugExitState, iobase, 0x501),
     59     DEFINE_PROP_UINT32("iosize", ISADebugExitState, iosize, 0x02),
     60     DEFINE_PROP_END_OF_LIST(),
     61 };
     62 
     63 static void debug_exit_class_initfn(ObjectClass *klass, void *data)
     64 {
     65     DeviceClass *dc = DEVICE_CLASS(klass);
     66 
     67     dc->realize = debug_exit_realizefn;
     68     device_class_set_props(dc, debug_exit_properties);
     69     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     70 }
     71 
     72 static const TypeInfo debug_exit_info = {
     73     .name          = TYPE_ISA_DEBUG_EXIT_DEVICE,
     74     .parent        = TYPE_ISA_DEVICE,
     75     .instance_size = sizeof(ISADebugExitState),
     76     .class_init    = debug_exit_class_initfn,
     77 };
     78 
     79 static void debug_exit_register_types(void)
     80 {
     81     type_register_static(&debug_exit_info);
     82 }
     83 
     84 type_init(debug_exit_register_types)