qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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vga-isa.c (3884B)

      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 "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     dc->reset = 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)