xref: /openbmc/qemu/hw/display/vga-isa.c (revision 500eb6db)
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/hw.h"
29 #include "hw/isa/isa.h"
30 #include "vga_int.h"
31 #include "ui/pixel_ops.h"
32 #include "qemu/module.h"
33 #include "qemu/timer.h"
34 #include "hw/loader.h"
35 
36 #define TYPE_ISA_VGA "isa-vga"
37 #define ISA_VGA(obj) OBJECT_CHECK(ISAVGAState, (obj), TYPE_ISA_VGA)
38 
39 typedef struct ISAVGAState {
40     ISADevice parent_obj;
41 
42     struct VGACommonState state;
43     PortioList portio_vga;
44     PortioList portio_vbe;
45 } ISAVGAState;
46 
47 static void vga_isa_reset(DeviceState *dev)
48 {
49     ISAVGAState *d = ISA_VGA(dev);
50     VGACommonState *s = &d->state;
51 
52     vga_common_reset(s);
53 }
54 
55 static void vga_isa_realizefn(DeviceState *dev, Error **errp)
56 {
57     ISADevice *isadev = ISA_DEVICE(dev);
58     ISAVGAState *d = ISA_VGA(dev);
59     VGACommonState *s = &d->state;
60     MemoryRegion *vga_io_memory;
61     const MemoryRegionPortio *vga_ports, *vbe_ports;
62 
63     s->global_vmstate = true;
64     vga_common_init(s, OBJECT(dev));
65     s->legacy_address_space = isa_address_space(isadev);
66     vga_io_memory = vga_init_io(s, OBJECT(dev), &vga_ports, &vbe_ports);
67     isa_register_portio_list(isadev, &d->portio_vga,
68                              0x3b0, vga_ports, s, "vga");
69     if (vbe_ports) {
70         isa_register_portio_list(isadev, &d->portio_vbe,
71                                  0x1ce, vbe_ports, s, "vbe");
72     }
73     memory_region_add_subregion_overlap(isa_address_space(isadev),
74                                         0x000a0000,
75                                         vga_io_memory, 1);
76     memory_region_set_coalescing(vga_io_memory);
77     s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);
78 
79     vga_init_vbe(s, OBJECT(dev), isa_address_space(isadev));
80     /* ROM BIOS */
81     rom_add_vga(VGABIOS_FILENAME);
82 }
83 
84 static Property vga_isa_properties[] = {
85     DEFINE_PROP_UINT32("vgamem_mb", ISAVGAState, state.vram_size_mb, 8),
86     DEFINE_PROP_END_OF_LIST(),
87 };
88 
89 static void vga_isa_class_initfn(ObjectClass *klass, void *data)
90 {
91     DeviceClass *dc = DEVICE_CLASS(klass);
92 
93     dc->realize = vga_isa_realizefn;
94     dc->reset = vga_isa_reset;
95     dc->vmsd = &vmstate_vga_common;
96     dc->props = vga_isa_properties;
97     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
98 }
99 
100 static const TypeInfo vga_isa_info = {
101     .name          = TYPE_ISA_VGA,
102     .parent        = TYPE_ISA_DEVICE,
103     .instance_size = sizeof(ISAVGAState),
104     .class_init    = vga_isa_class_initfn,
105 };
106 
107 static void vga_isa_register_types(void)
108 {
109     type_register_static(&vga_isa_info);
110 }
111 
112 type_init(vga_isa_register_types)
113