hw/display/vga-mmio.c

   1 /*
   2  * QEMU MMIO VGA Emulator.
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "qapi/error.h"
  27 #include "hw/sysbus.h"
  28 #include "hw/display/vga.h"
  29 #include "hw/qdev-properties.h"
  30 #include "ui/console.h"
  31 #include "vga_int.h"
  32
  33 /*
  34  * QEMU interface:
  35  *  + sysbus MMIO region 0: VGA I/O registers
  36  *  + sysbus MMIO region 1: VGA MMIO registers
  37  *  + sysbus MMIO region 2: VGA memory
  38  */
  39
  40 OBJECT_DECLARE_SIMPLE_TYPE(VGAMmioState, VGA_MMIO)
  41
  42 struct VGAMmioState {
  43     /*< private >*/
  44     SysBusDevice parent_obj;
  45
  46     /*< public >*/
  47     VGACommonState vga;
  48     MemoryRegion iomem;
  49     MemoryRegion lowmem;
  50
  51     uint8_t it_shift;
  52 };
  53
  54 static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size)
  55 {
  56     VGAMmioState *s = opaque;
  57
  58     return vga_ioport_read(&s->vga, addr >> s->it_shift) &
  59         MAKE_64BIT_MASK(0, size * 8);
  60 }
  61
  62 static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value,
  63                          unsigned size)
  64 {
  65     VGAMmioState *s = opaque;
  66
  67     vga_ioport_write(&s->vga, addr >> s->it_shift,
  68                      value & MAKE_64BIT_MASK(0, size * 8));
  69 }
  70
  71 static const MemoryRegionOps vga_mm_ctrl_ops = {
  72     .read = vga_mm_read,
  73     .write = vga_mm_write,
  74     .valid.min_access_size = 1,
  75     .valid.max_access_size = 4,
  76     .impl.min_access_size = 1,
  77     .impl.max_access_size = 4,
  78     .endianness = DEVICE_NATIVE_ENDIAN,
  79 };
  80
  81 static void vga_mmio_reset(DeviceState *dev)
  82 {
  83     VGAMmioState *s = VGA_MMIO(dev);
  84
  85     vga_common_reset(&s->vga);
  86 }
  87
  88 static void vga_mmio_realizefn(DeviceState *dev, Error **errp)
  89 {
  90     VGAMmioState *s = VGA_MMIO(dev);
  91     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  92
  93     memory_region_init_io(&s->iomem, OBJECT(dev), &vga_mm_ctrl_ops, s,
  94                           "vga-mmio", 0x100000);
  95     memory_region_set_flush_coalesced(&s->iomem);
  96     sysbus_init_mmio(sbd, &s->iomem);
  97
  98     /* XXX: endianness? */
  99     memory_region_init_io(&s->lowmem, OBJECT(dev), &vga_mem_ops, &s->vga,
 100                           "vga-lowmem", 0x20000);
 101     memory_region_set_coalescing(&s->lowmem);
 102     sysbus_init_mmio(sbd, &s->lowmem);
 103
 104     s->vga.bank_offset = 0;
 105     s->vga.global_vmstate = true;
 106     if (!vga_common_init(&s->vga, OBJECT(dev), errp)) {
 107         return;
 108     }
 109
 110     sysbus_init_mmio(sbd, &s->vga.vram);
 111     s->vga.con = graphic_console_init(dev, 0, s->vga.hw_ops, &s->vga);
 112 }
 113
 114 static Property vga_mmio_properties[] = {
 115     DEFINE_PROP_UINT8("it_shift", VGAMmioState, it_shift, 0),
 116     DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8),
 117     DEFINE_PROP_END_OF_LIST(),
 118 };
 119
 120 static void vga_mmio_class_initfn(ObjectClass *klass, void *data)
 121 {
 122     DeviceClass *dc = DEVICE_CLASS(klass);
 123
 124     dc->realize = vga_mmio_realizefn;
 125     dc->reset = vga_mmio_reset;
 126     dc->vmsd = &vmstate_vga_common;
 127     device_class_set_props(dc, vga_mmio_properties);
 128     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 129 }
 130
 131 static const TypeInfo vga_mmio_info = {
 132     .name          = TYPE_VGA_MMIO,
 133     .parent        = TYPE_SYS_BUS_DEVICE,
 134     .instance_size = sizeof(VGAMmioState),
 135     .class_init    = vga_mmio_class_initfn,
 136 };
 137
 138 static void vga_mmio_register_types(void)
 139 {
 140     type_register_static(&vga_mmio_info);
 141 }
 142
 143 type_init(vga_mmio_register_types)