xref: /openbmc/qemu/hw/display/vga-isa.c (revision 7d87775f)
1 /*
2  * QEMU ISA VGA Emulator.
3  *
4  * see docs/specs/standard-vga.rst 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 "ui/console.h"
36 #include "qom/object.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     s->global_vmstate = true;
66     if (!vga_common_init(s, OBJECT(dev), errp)) {
67         return;
68     }
69 
70     s->legacy_address_space = isa_address_space(isadev);
71     vga_io_memory = vga_init_io(s, OBJECT(dev), &vga_ports, &vbe_ports);
72     isa_register_portio_list(isadev, &d->portio_vga,
73                              0x3b0, vga_ports, s, "vga");
74     if (vbe_ports) {
75         isa_register_portio_list(isadev, &d->portio_vbe,
76                                  0x1ce, vbe_ports, s, "vbe");
77     }
78     memory_region_add_subregion_overlap(isa_address_space(isadev),
79                                         0x000a0000,
80                                         vga_io_memory, 1);
81     memory_region_set_coalescing(vga_io_memory);
82     s->con = graphic_console_init(dev, 0, s->hw_ops, s);
83 
84     memory_region_add_subregion(isa_address_space(isadev),
85                                 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
86                                 &s->vram);
87     /* ROM BIOS */
88     rom_add_vga(VGABIOS_FILENAME);
89 }
90 
91 static Property vga_isa_properties[] = {
92     DEFINE_PROP_UINT32("vgamem_mb", ISAVGAState, state.vram_size_mb, 8),
93     DEFINE_PROP_END_OF_LIST(),
94 };
95 
96 static void vga_isa_class_initfn(ObjectClass *klass, void *data)
97 {
98     DeviceClass *dc = DEVICE_CLASS(klass);
99 
100     dc->realize = vga_isa_realizefn;
101     device_class_set_legacy_reset(dc, vga_isa_reset);
102     dc->vmsd = &vmstate_vga_common;
103     device_class_set_props(dc, vga_isa_properties);
104     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
105 }
106 
107 static const TypeInfo vga_isa_info = {
108     .name          = TYPE_ISA_VGA,
109     .parent        = TYPE_ISA_DEVICE,
110     .instance_size = sizeof(ISAVGAState),
111     .class_init    = vga_isa_class_initfn,
112 };
113 
114 static void vga_isa_register_types(void)
115 {
116     type_register_static(&vga_isa_info);
117 }
118 
119 type_init(vga_isa_register_types)
120