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 #include "qemu/osdep.h"
  27 #include "hw/hw.h"
  28 #include "hw/isa/isa.h"
  29 #include "vga_int.h"
  30 #include "ui/pixel_ops.h"
  31 #include "qemu/timer.h"
  32 #include "hw/loader.h"
  33
  34 #define TYPE_ISA_VGA "isa-vga"
  35 #define ISA_VGA(obj) OBJECT_CHECK(ISAVGAState, (obj), TYPE_ISA_VGA)
  36
  37 typedef struct ISAVGAState {
  38     ISADevice parent_obj;
  39
  40     struct VGACommonState state;
  41     PortioList portio_vga;
  42     PortioList portio_vbe;
  43 } ISAVGAState;
  44
  45 static void vga_isa_reset(DeviceState *dev)
  46 {
  47     ISAVGAState *d = ISA_VGA(dev);
  48     VGACommonState *s = &d->state;
  49
  50     vga_common_reset(s);
  51 }
  52
  53 static void vga_isa_realizefn(DeviceState *dev, Error **errp)
  54 {
  55     ISADevice *isadev = ISA_DEVICE(dev);
  56     ISAVGAState *d = ISA_VGA(dev);
  57     VGACommonState *s = &d->state;
  58     MemoryRegion *vga_io_memory;
  59     const MemoryRegionPortio *vga_ports, *vbe_ports;
  60
  61     vga_common_init(s, OBJECT(dev), true);
  62     s->legacy_address_space = isa_address_space(isadev);
  63     vga_io_memory = vga_init_io(s, OBJECT(dev), &vga_ports, &vbe_ports);
  64     isa_register_portio_list(isadev, &d->portio_vga,
  65                              0x3b0, vga_ports, s, "vga");
  66     if (vbe_ports) {
  67         isa_register_portio_list(isadev, &d->portio_vbe,
  68                                  0x1ce, vbe_ports, s, "vbe");
  69     }
  70     memory_region_add_subregion_overlap(isa_address_space(isadev),
  71                                         0x000a0000,
  72                                         vga_io_memory, 1);
  73     memory_region_set_coalescing(vga_io_memory);
  74     s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);
  75
  76     vga_init_vbe(s, OBJECT(dev), isa_address_space(isadev));
  77     /* ROM BIOS */
  78     rom_add_vga(VGABIOS_FILENAME);
  79 }
  80
  81 static Property vga_isa_properties[] = {
  82     DEFINE_PROP_UINT32("vgamem_mb", ISAVGAState, state.vram_size_mb, 8),
  83     DEFINE_PROP_END_OF_LIST(),
  84 };
  85
  86 static void vga_isa_class_initfn(ObjectClass *klass, void *data)
  87 {
  88     DeviceClass *dc = DEVICE_CLASS(klass);
  89
  90     dc->realize = vga_isa_realizefn;
  91     dc->reset = vga_isa_reset;
  92     dc->vmsd = &vmstate_vga_common;
  93     dc->props = vga_isa_properties;
  94     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
  95 }
  96
  97 static const TypeInfo vga_isa_info = {
  98     .name          = TYPE_ISA_VGA,
  99     .parent        = TYPE_ISA_DEVICE,
 100     .instance_size = sizeof(ISAVGAState),
 101     .class_init    = vga_isa_class_initfn,
 102 };
 103
 104 static void vga_isa_register_types(void)
 105 {
 106     type_register_static(&vga_isa_info);
 107 }
 108
 109 type_init(vga_isa_register_types)