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 "vga_int.h"
  31
  32 /*
  33  * QEMU interface:
  34  *  + sysbus MMIO region 0: VGA I/O registers
  35  *  + sysbus MMIO region 1: VGA MMIO registers
  36  *  + sysbus MMIO region 2: VGA memory
  37  */
  38
  39 OBJECT_DECLARE_SIMPLE_TYPE(VGAMmioState, VGA_MMIO)
  40
  41 struct VGAMmioState {
  42     /*< private >*/
  43     SysBusDevice parent_obj;
  44
  45     /*< public >*/
  46     VGACommonState vga;
  47     MemoryRegion iomem;
  48     MemoryRegion lowmem;
  49
  50     uint8_t it_shift;
  51 };
  52
  53 static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size)
  54 {
  55     VGAMmioState *s = opaque;
  56
  57     return vga_ioport_read(&s->vga, addr >> s->it_shift) &
  58         MAKE_64BIT_MASK(0, size * 8);
  59 }
  60
  61 static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value,
  62                          unsigned size)
  63 {
  64     VGAMmioState *s = opaque;
  65
  66     vga_ioport_write(&s->vga, addr >> s->it_shift,
  67                      value & MAKE_64BIT_MASK(0, size * 8));
  68 }
  69
  70 static const MemoryRegionOps vga_mm_ctrl_ops = {
  71     .read = vga_mm_read,
  72     .write = vga_mm_write,
  73     .valid.min_access_size = 1,
  74     .valid.max_access_size = 4,
  75     .impl.min_access_size = 1,
  76     .impl.max_access_size = 4,
  77     .endianness = DEVICE_NATIVE_ENDIAN,
  78 };
  79
  80 static void vga_mmio_reset(DeviceState *dev)
  81 {
  82     VGAMmioState *s = VGA_MMIO(dev);
  83
  84     vga_common_reset(&s->vga);
  85 }
  86
  87 static void vga_mmio_realizefn(DeviceState *dev, Error **errp)
  88 {
  89     VGAMmioState *s = VGA_MMIO(dev);
  90     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  91
  92     memory_region_init_io(&s->iomem, OBJECT(dev), &vga_mm_ctrl_ops, s,
  93                           "vga-mmio", 0x100000);
  94     memory_region_set_flush_coalesced(&s->iomem);
  95     sysbus_init_mmio(sbd, &s->iomem);
  96
  97     /* XXX: endianness? */
  98     memory_region_init_io(&s->lowmem, OBJECT(dev), &vga_mem_ops, &s->vga,
  99                           "vga-lowmem", 0x20000);
 100     memory_region_set_coalescing(&s->lowmem);
 101     sysbus_init_mmio(sbd, &s->lowmem);
 102
 103     s->vga.bank_offset = 0;
 104     s->vga.global_vmstate = true;
 105     if (!vga_common_init(&s->vga, OBJECT(dev), errp)) {
 106         return;
 107     }
 108
 109     sysbus_init_mmio(sbd, &s->vga.vram);
 110     s->vga.con = graphic_console_init(dev, 0, s->vga.hw_ops, &s->vga);
 111 }
 112
 113 static Property vga_mmio_properties[] = {
 114     DEFINE_PROP_UINT8("it_shift", VGAMmioState, it_shift, 0),
 115     DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8),
 116     DEFINE_PROP_END_OF_LIST(),
 117 };
 118
 119 static void vga_mmio_class_initfn(ObjectClass *klass, void *data)
 120 {
 121     DeviceClass *dc = DEVICE_CLASS(klass);
 122
 123     dc->realize = vga_mmio_realizefn;
 124     dc->reset = vga_mmio_reset;
 125     dc->vmsd = &vmstate_vga_common;
 126     device_class_set_props(dc, vga_mmio_properties);
 127     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 128 }
 129
 130 static const TypeInfo vga_mmio_info = {
 131     .name          = TYPE_VGA_MMIO,
 132     .parent        = TYPE_SYS_BUS_DEVICE,
 133     .instance_size = sizeof(VGAMmioState),
 134     .class_init    = vga_mmio_class_initfn,
 135 };
 136
 137 static void vga_mmio_register_types(void)
 138 {
 139     type_register_static(&vga_mmio_info);
 140 }
 141
 142 type_init(vga_mmio_register_types)