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 "kvm.h"
  32
  33 typedef struct PCIVGAState {
  34     PCIDevice dev;
  35     VGACommonState vga;
  36 } PCIVGAState;
  37
  38 static void pci_vga_save(QEMUFile *f, void *opaque)
  39 {
  40     PCIVGAState *s = opaque;
  41
  42     pci_device_save(&s->dev, f);
  43     vga_common_save(f, &s->vga);
  44 }
  45
  46 static int pci_vga_load(QEMUFile *f, void *opaque, int version_id)
  47 {
  48     PCIVGAState *s = opaque;
  49     int ret;
  50
  51     if (version_id > 2)
  52         return -EINVAL;
  53
  54     if (version_id >= 2) {
  55         ret = pci_device_load(&s->dev, f);
  56         if (ret < 0)
  57             return ret;
  58     }
  59     return vga_common_load(f, &s->vga, version_id);
  60 }
  61
  62 void vga_dirty_log_start(VGACommonState *s)
  63 {
  64     if (kvm_enabled() && s->map_addr)
  65         kvm_log_start(s->map_addr, s->map_end - s->map_addr);
  66
  67     if (kvm_enabled() && s->lfb_vram_mapped) {
  68         kvm_log_start(isa_mem_base + 0xa0000, 0x8000);
  69         kvm_log_start(isa_mem_base + 0xa8000, 0x8000);
  70     }
  71 }
  72
  73 static void vga_map(PCIDevice *pci_dev, int region_num,
  74                     uint32_t addr, uint32_t size, int type)
  75 {
  76     PCIVGAState *d = (PCIVGAState *)pci_dev;
  77     VGACommonState *s = &d->vga;
  78     if (region_num == PCI_ROM_SLOT) {
  79         cpu_register_physical_memory(addr, s->bios_size, s->bios_offset);
  80     } else {
  81         cpu_register_physical_memory(addr, s->vram_size, s->vram_offset);
  82         s->map_addr = addr;
  83         s->map_end = addr + s->vram_size;
  84         vga_dirty_log_start(s);
  85     }
  86 }
  87
  88 static void pci_vga_write_config(PCIDevice *d,
  89                                  uint32_t address, uint32_t val, int len)
  90 {
  91     PCIVGAState *pvs = container_of(d, PCIVGAState, dev);
  92     VGACommonState *s = &pvs->vga;
  93
  94     pci_default_write_config(d, address, val, len);
  95     if (s->map_addr && pvs->dev.io_regions[0].addr == -1)
  96         s->map_addr = 0;
  97 }
  98
  99 static int pci_vga_initfn(PCIDevice *dev)
 100 {
 101      PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
 102      VGACommonState *s = &d->vga;
 103      uint8_t *pci_conf = d->dev.config;
 104
 105      // vga + console init
 106      vga_common_init(s, VGA_RAM_SIZE);
 107      vga_init(s);
 108      register_savevm("vga", 0, 2, pci_vga_save, pci_vga_load, d);
 109
 110      s->ds = graphic_console_init(s->update, s->invalidate,
 111                                   s->screen_dump, s->text_update, s);
 112
 113      // dummy VGA (same as Bochs ID)
 114      pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_QEMU);
 115      pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_QEMU_VGA);
 116      pci_config_set_class(pci_conf, PCI_CLASS_DISPLAY_VGA);
 117      pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
 118
 119      /* XXX: VGA_RAM_SIZE must be a power of two */
 120      pci_register_bar(&d->dev, 0, VGA_RAM_SIZE,
 121                       PCI_ADDRESS_SPACE_MEM_PREFETCH, vga_map);
 122
 123      if (s->bios_size) {
 124         unsigned int bios_total_size;
 125         /* must be a power of two */
 126         bios_total_size = 1;
 127         while (bios_total_size < s->bios_size)
 128             bios_total_size <<= 1;
 129         pci_register_bar(&d->dev, PCI_ROM_SLOT, bios_total_size,
 130                          PCI_ADDRESS_SPACE_MEM_PREFETCH, vga_map);
 131      }
 132      return 0;
 133 }
 134
 135 int pci_vga_init(PCIBus *bus,
 136                  unsigned long vga_bios_offset, int vga_bios_size)
 137 {
 138     PCIDevice *dev;
 139
 140     dev = pci_create("VGA", NULL);
 141     qdev_prop_set_uint32(&dev->qdev, "bios-offset", vga_bios_offset);
 142     qdev_prop_set_uint32(&dev->qdev, "bios-size", vga_bios_offset);
 143     qdev_init(&dev->qdev);
 144
 145     return 0;
 146 }
 147
 148 static PCIDeviceInfo vga_info = {
 149     .qdev.name    = "VGA",
 150     .qdev.size    = sizeof(PCIVGAState),
 151     .init         = pci_vga_initfn,
 152     .config_write = pci_vga_write_config,
 153     .qdev.props   = (Property[]) {
 154         DEFINE_PROP_HEX32("bios-offset", PCIVGAState, vga.bios_offset, 0),
 155         DEFINE_PROP_HEX32("bios-size",   PCIVGAState, vga.bios_size,   0),
 156         DEFINE_PROP_END_OF_LIST(),
 157     }
 158 };
 159
 160 static void vga_register(void)
 161 {
 162     pci_qdev_register(&vga_info);
 163 }
 164 device_init(vga_register);