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     if (region_num == PCI_ROM_SLOT) {
  56         cpu_register_physical_memory(addr, s->bios_size, s->bios_offset);
  57     } else {
  58         cpu_register_physical_memory(addr, s->vram_size, s->vram_offset);
  59         s->map_addr = addr;
  60         s->map_end = addr + s->vram_size;
  61         vga_dirty_log_start(s);
  62     }
  63 }
  64
  65 static void pci_vga_write_config(PCIDevice *d,
  66                                  uint32_t address, uint32_t val, int len)
  67 {
  68     PCIVGAState *pvs = container_of(d, PCIVGAState, dev);
  69     VGACommonState *s = &pvs->vga;
  70
  71     pci_default_write_config(d, address, val, len);
  72     if (s->map_addr && pvs->dev.io_regions[0].addr == -1)
  73         s->map_addr = 0;
  74 }
  75
  76 static int pci_vga_initfn(PCIDevice *dev)
  77 {
  78      PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
  79      VGACommonState *s = &d->vga;
  80      uint8_t *pci_conf = d->dev.config;
  81
  82      // vga + console init
  83      vga_common_init(s, VGA_RAM_SIZE);
  84      vga_init(s);
  85
  86      s->ds = graphic_console_init(s->update, s->invalidate,
  87                                   s->screen_dump, s->text_update, s);
  88
  89      // dummy VGA (same as Bochs ID)
  90      pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_QEMU);
  91      pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_QEMU_VGA);
  92      pci_config_set_class(pci_conf, PCI_CLASS_DISPLAY_VGA);
  93      pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
  94
  95      /* XXX: VGA_RAM_SIZE must be a power of two */
  96      pci_register_bar(&d->dev, 0, VGA_RAM_SIZE,
  97                       PCI_BASE_ADDRESS_MEM_PREFETCH, vga_map);
  98
  99      if (s->bios_size) {
 100         unsigned int bios_total_size;
 101         /* must be a power of two */
 102         bios_total_size = 1;
 103         while (bios_total_size < s->bios_size)
 104             bios_total_size <<= 1;
 105         pci_register_bar(&d->dev, PCI_ROM_SLOT, bios_total_size,
 106                          PCI_BASE_ADDRESS_MEM_PREFETCH, vga_map);
 107      }
 108
 109     vga_init_vbe(s);
 110      /* ROM BIOS */
 111      rom_add_vga(VGABIOS_FILENAME);
 112      return 0;
 113 }
 114
 115 int pci_vga_init(PCIBus *bus,
 116                  unsigned long vga_bios_offset, int vga_bios_size)
 117 {
 118     PCIDevice *dev;
 119
 120     dev = pci_create(bus, -1, "VGA");
 121     qdev_prop_set_uint32(&dev->qdev, "bios-offset", vga_bios_offset);
 122     qdev_prop_set_uint32(&dev->qdev, "bios-size", vga_bios_size);
 123     qdev_init_nofail(&dev->qdev);
 124
 125     return 0;
 126 }
 127
 128 static PCIDeviceInfo vga_info = {
 129     .qdev.name    = "VGA",
 130     .qdev.size    = sizeof(PCIVGAState),
 131     .qdev.vmsd    = &vmstate_vga_pci,
 132     .init         = pci_vga_initfn,
 133     .config_write = pci_vga_write_config,
 134     .qdev.props   = (Property[]) {
 135         DEFINE_PROP_HEX32("bios-offset", PCIVGAState, vga.bios_offset, 0),
 136         DEFINE_PROP_HEX32("bios-size",   PCIVGAState, vga.bios_size,   0),
 137         DEFINE_PROP_END_OF_LIST(),
 138     }
 139 };
 140
 141 static void vga_register(void)
 142 {
 143     pci_qdev_register(&vga_info);
 144 }
 145 device_init(vga_register);