hw/display/vga-isa.c

   1 /*
   2  * QEMU ISA VGA Emulator.
   3  *
   4  * see docs/specs/standard-vga.txt for virtual hardware specs.
   5  *
   6  * Copyright (c) 2003 Fabrice Bellard
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #include "qemu/osdep.h"
  28 #include "hw/isa/isa.h"
  29 #include "vga_int.h"
  30 #include "ui/pixel_ops.h"
  31 #include "qemu/module.h"
  32 #include "qemu/timer.h"
  33 #include "hw/loader.h"
  34 #include "hw/qdev-properties.h"
  35 #include "qom/object.h"
  36 #include "qapi/error.h"
  37
  38 #define TYPE_ISA_VGA "isa-vga"
  39 OBJECT_DECLARE_SIMPLE_TYPE(ISAVGAState, ISA_VGA)
  40
  41 struct ISAVGAState {
  42     ISADevice parent_obj;
  43
  44     struct VGACommonState state;
  45     PortioList portio_vga;
  46     PortioList portio_vbe;
  47 };
  48
  49 static void vga_isa_reset(DeviceState *dev)
  50 {
  51     ISAVGAState *d = ISA_VGA(dev);
  52     VGACommonState *s = &d->state;
  53
  54     vga_common_reset(s);
  55 }
  56
  57 static void vga_isa_realizefn(DeviceState *dev, Error **errp)
  58 {
  59     ISADevice *isadev = ISA_DEVICE(dev);
  60     ISAVGAState *d = ISA_VGA(dev);
  61     VGACommonState *s = &d->state;
  62     MemoryRegion *vga_io_memory;
  63     const MemoryRegionPortio *vga_ports, *vbe_ports;
  64
  65     /*
  66      * make sure this device is not being added twice, if so
  67      * exit without crashing qemu
  68      */
  69     if (object_resolve_path_type("", TYPE_ISA_VGA, NULL)) {
  70         error_setg(errp, "at most one %s device is permitted", TYPE_ISA_VGA);
  71         return;
  72     }
  73
  74     s->global_vmstate = true;
  75     vga_common_init(s, OBJECT(dev));
  76     s->legacy_address_space = isa_address_space(isadev);
  77     vga_io_memory = vga_init_io(s, OBJECT(dev), &vga_ports, &vbe_ports);
  78     isa_register_portio_list(isadev, &d->portio_vga,
  79                              0x3b0, vga_ports, s, "vga");
  80     if (vbe_ports) {
  81         isa_register_portio_list(isadev, &d->portio_vbe,
  82                                  0x1ce, vbe_ports, s, "vbe");
  83     }
  84     memory_region_add_subregion_overlap(isa_address_space(isadev),
  85                                         0x000a0000,
  86                                         vga_io_memory, 1);
  87     memory_region_set_coalescing(vga_io_memory);
  88     s->con = graphic_console_init(dev, 0, s->hw_ops, s);
  89
  90     memory_region_add_subregion(isa_address_space(isadev),
  91                                 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
  92                                 &s->vram);
  93     /* ROM BIOS */
  94     rom_add_vga(VGABIOS_FILENAME);
  95 }
  96
  97 static Property vga_isa_properties[] = {
  98     DEFINE_PROP_UINT32("vgamem_mb", ISAVGAState, state.vram_size_mb, 8),
  99     DEFINE_PROP_END_OF_LIST(),
 100 };
 101
 102 static void vga_isa_class_initfn(ObjectClass *klass, void *data)
 103 {
 104     DeviceClass *dc = DEVICE_CLASS(klass);
 105
 106     dc->realize = vga_isa_realizefn;
 107     dc->reset = vga_isa_reset;
 108     dc->vmsd = &vmstate_vga_common;
 109     device_class_set_props(dc, vga_isa_properties);
 110     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 111 }
 112
 113 static const TypeInfo vga_isa_info = {
 114     .name          = TYPE_ISA_VGA,
 115     .parent        = TYPE_ISA_DEVICE,
 116     .instance_size = sizeof(ISAVGAState),
 117     .class_init    = vga_isa_class_initfn,
 118 };
 119
 120 static void vga_isa_register_types(void)
 121 {
 122     type_register_static(&vga_isa_info);
 123 }
 124
 125 type_init(vga_isa_register_types)