hw/vga-pci.c

   1 /*
   2  * QEMU PCI 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 #include "hw.h"
  25 #include "console.h"
  26 #include "pc.h"
  27 #include "pci.h"
  28 #include "vga_int.h"
  29 #include "pixel_ops.h"
  30 #include "qemu-timer.h"
  31 #include "loader.h"
  32
  33 typedef struct PCIVGAState {
  34     PCIDevice dev;
  35     VGACommonState vga;
  36 } PCIVGAState;
  37
  38 static const VMStateDescription vmstate_vga_pci = {
  39     .name = "vga",
  40     .version_id = 2,
  41     .minimum_version_id = 2,
  42     .minimum_version_id_old = 2,
  43     .fields      = (VMStateField []) {
  44         VMSTATE_PCI_DEVICE(dev, PCIVGAState),
  45         VMSTATE_STRUCT(vga, PCIVGAState, 0, vmstate_vga_common, VGACommonState),
  46         VMSTATE_END_OF_LIST()
  47     }
  48 };
  49
  50 static void vga_map(PCIDevice *pci_dev, int region_num,
  51                     pcibus_t addr, pcibus_t size, int type)
  52 {
  53     PCIVGAState *d = (PCIVGAState *)pci_dev;
  54     VGACommonState *s = &d->vga;
  55
  56     cpu_register_physical_memory(addr, s->vram_size, s->vram_offset);
  57     s->map_addr = addr;
  58     s->map_end = addr + s->vram_size;
  59     vga_dirty_log_start(s);
  60 }
  61
  62 static void pci_vga_write_config(PCIDevice *d,
  63                                  uint32_t address, uint32_t val, int len)
  64 {
  65     PCIVGAState *pvs = container_of(d, PCIVGAState, dev);
  66     VGACommonState *s = &pvs->vga;
  67
  68     vga_dirty_log_stop(s);
  69     pci_default_write_config(d, address, val, len);
  70     if (s->map_addr && pvs->dev.io_regions[0].addr == -1)
  71         s->map_addr = 0;
  72     vga_dirty_log_start(s);
  73 }
  74
  75 static int pci_vga_initfn(PCIDevice *dev)
  76 {
  77      PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
  78      VGACommonState *s = &d->vga;
  79      uint8_t *pci_conf = d->dev.config;
  80
  81      // vga + console init
  82      vga_common_init(s, VGA_RAM_SIZE);
  83      vga_init(s);
  84
  85      s->ds = graphic_console_init(s->update, s->invalidate,
  86                                   s->screen_dump, s->text_update, s);
  87
  88      // dummy VGA (same as Bochs ID)
  89      pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_QEMU);
  90      pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_QEMU_VGA);
  91      pci_config_set_class(pci_conf, PCI_CLASS_DISPLAY_VGA);
  92
  93      /* XXX: VGA_RAM_SIZE must be a power of two */
  94      pci_register_bar(&d->dev, 0, VGA_RAM_SIZE,
  95                       PCI_BASE_ADDRESS_MEM_PREFETCH, vga_map);
  96
  97      if (!dev->rom_bar) {
  98          /* compatibility with pc-0.13 and older */
  99          vga_init_vbe(s);
 100      }
 101
 102      return 0;
 103 }
 104
 105 int pci_vga_init(PCIBus *bus)
 106 {
 107     pci_create_simple(bus, -1, "VGA");
 108     return 0;
 109 }
 110
 111 static PCIDeviceInfo vga_info = {
 112     .qdev.name    = "VGA",
 113     .qdev.size    = sizeof(PCIVGAState),
 114     .qdev.vmsd    = &vmstate_vga_pci,
 115     .init         = pci_vga_initfn,
 116     .config_write = pci_vga_write_config,
 117     .romfile      = "vgabios-stdvga.bin",
 118 };
 119
 120 static void vga_register(void)
 121 {
 122     pci_qdev_register(&vga_info);
 123 }
 124 device_init(vga_register);