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
  32 typedef struct PCIVGAState {
  33     PCIDevice dev;
  34     VGACommonState vga;
  35 } PCIVGAState;
  36
  37 static void pci_vga_save(QEMUFile *f, void *opaque)
  38 {
  39     PCIVGAState *s = opaque;
  40
  41     pci_device_save(&s->dev, f);
  42     vga_common_save(f, &s->vga);
  43 }
  44
  45 static int pci_vga_load(QEMUFile *f, void *opaque, int version_id)
  46 {
  47     PCIVGAState *s = opaque;
  48     int ret;
  49
  50     if (version_id > 2)
  51         return -EINVAL;
  52
  53     if (version_id >= 2) {
  54         ret = pci_device_load(&s->dev, f);
  55         if (ret < 0)
  56             return ret;
  57     }
  58     return vga_common_load(f, &s->vga, version_id);
  59 }
  60
  61 static void vga_map(PCIDevice *pci_dev, int region_num,
  62                     uint32_t addr, uint32_t size, int type)
  63 {
  64     PCIVGAState *d = (PCIVGAState *)pci_dev;
  65     VGACommonState *s = &d->vga;
  66     if (region_num == PCI_ROM_SLOT) {
  67         cpu_register_physical_memory(addr, s->bios_size, s->bios_offset);
  68     } else {
  69         cpu_register_physical_memory(addr, s->vram_size, s->vram_offset);
  70         s->map_addr = addr;
  71         s->map_end = addr + s->vram_size;
  72         vga_dirty_log_start(s);
  73     }
  74 }
  75
  76 static void pci_vga_write_config(PCIDevice *d,
  77                                  uint32_t address, uint32_t val, int len)
  78 {
  79     PCIVGAState *pvs = container_of(d, PCIVGAState, dev);
  80     VGACommonState *s = &pvs->vga;
  81
  82     pci_default_write_config(d, address, val, len);
  83     if (s->map_addr && pvs->dev.io_regions[0].addr == -1)
  84         s->map_addr = 0;
  85 }
  86
  87 static int pci_vga_initfn(PCIDevice *dev)
  88 {
  89      PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
  90      VGACommonState *s = &d->vga;
  91      uint8_t *pci_conf = d->dev.config;
  92
  93      // vga + console init
  94      vga_common_init(s, VGA_RAM_SIZE);
  95      vga_init(s);
  96      register_savevm("vga", 0, 2, pci_vga_save, pci_vga_load, d);
  97
  98      s->ds = graphic_console_init(s->update, s->invalidate,
  99                                   s->screen_dump, s->text_update, s);
 100
 101      // dummy VGA (same as Bochs ID)
 102      pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_QEMU);
 103      pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_QEMU_VGA);
 104      pci_config_set_class(pci_conf, PCI_CLASS_DISPLAY_VGA);
 105      pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
 106
 107      /* XXX: VGA_RAM_SIZE must be a power of two */
 108      pci_register_bar(&d->dev, 0, VGA_RAM_SIZE,
 109                       PCI_ADDRESS_SPACE_MEM_PREFETCH, vga_map);
 110
 111      if (s->bios_size) {
 112         unsigned int bios_total_size;
 113         /* must be a power of two */
 114         bios_total_size = 1;
 115         while (bios_total_size < s->bios_size)
 116             bios_total_size <<= 1;
 117         pci_register_bar(&d->dev, PCI_ROM_SLOT, bios_total_size,
 118                          PCI_ADDRESS_SPACE_MEM_PREFETCH, vga_map);
 119      }
 120      return 0;
 121 }
 122
 123 int pci_vga_init(PCIBus *bus,
 124                  unsigned long vga_bios_offset, int vga_bios_size)
 125 {
 126     PCIDevice *dev;
 127
 128     dev = pci_create("VGA", NULL);
 129     qdev_prop_set_uint32(&dev->qdev, "bios-offset", vga_bios_offset);
 130     qdev_prop_set_uint32(&dev->qdev, "bios-size", vga_bios_offset);
 131     qdev_init(&dev->qdev);
 132
 133     return 0;
 134 }
 135
 136 static PCIDeviceInfo vga_info = {
 137     .qdev.name    = "VGA",
 138     .qdev.size    = sizeof(PCIVGAState),
 139     .init         = pci_vga_initfn,
 140     .config_write = pci_vga_write_config,
 141     .qdev.props   = (Property[]) {
 142         DEFINE_PROP_HEX32("bios-offset", PCIVGAState, vga.bios_offset, 0),
 143         DEFINE_PROP_HEX32("bios-size",   PCIVGAState, vga.bios_size,   0),
 144         DEFINE_PROP_END_OF_LIST(),
 145     }
 146 };
 147
 148 static void vga_register(void)
 149 {
 150     pci_qdev_register(&vga_info);
 151 }
 152 device_init(vga_register);