1 /* 2 * QEMU PCI VGA Emulator. 3 * 4 * see docs/specs/standard-vga.txt for virtual hardware specs. 5 * 6 * Copyright (c) 2003 Fabrice Bellard 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 */ 26 #include "hw/hw.h" 27 #include "ui/console.h" 28 #include "hw/pci/pci.h" 29 #include "vga_int.h" 30 #include "ui/pixel_ops.h" 31 #include "qemu/timer.h" 32 #include "hw/loader.h" 33 34 #define PCI_VGA_IOPORT_OFFSET 0x400 35 #define PCI_VGA_IOPORT_SIZE (0x3e0 - 0x3c0) 36 #define PCI_VGA_BOCHS_OFFSET 0x500 37 #define PCI_VGA_BOCHS_SIZE (0x0b * 2) 38 #define PCI_VGA_MMIO_SIZE 0x1000 39 40 enum vga_pci_flags { 41 PCI_VGA_FLAG_ENABLE_MMIO = 1, 42 }; 43 44 typedef struct PCIVGAState { 45 PCIDevice dev; 46 VGACommonState vga; 47 uint32_t flags; 48 MemoryRegion mmio; 49 MemoryRegion ioport; 50 MemoryRegion bochs; 51 } PCIVGAState; 52 53 static const VMStateDescription vmstate_vga_pci = { 54 .name = "vga", 55 .version_id = 2, 56 .minimum_version_id = 2, 57 .minimum_version_id_old = 2, 58 .fields = (VMStateField []) { 59 VMSTATE_PCI_DEVICE(dev, PCIVGAState), 60 VMSTATE_STRUCT(vga, PCIVGAState, 0, vmstate_vga_common, VGACommonState), 61 VMSTATE_END_OF_LIST() 62 } 63 }; 64 65 static uint64_t pci_vga_ioport_read(void *ptr, hwaddr addr, 66 unsigned size) 67 { 68 PCIVGAState *d = ptr; 69 uint64_t ret = 0; 70 71 switch (size) { 72 case 1: 73 ret = vga_ioport_read(&d->vga, addr); 74 break; 75 case 2: 76 ret = vga_ioport_read(&d->vga, addr); 77 ret |= vga_ioport_read(&d->vga, addr+1) << 8; 78 break; 79 } 80 return ret; 81 } 82 83 static void pci_vga_ioport_write(void *ptr, hwaddr addr, 84 uint64_t val, unsigned size) 85 { 86 PCIVGAState *d = ptr; 87 88 switch (size) { 89 case 1: 90 vga_ioport_write(&d->vga, addr + 0x3c0, val); 91 break; 92 case 2: 93 /* 94 * Update bytes in little endian order. Allows to update 95 * indexed registers with a single word write because the 96 * index byte is updated first. 97 */ 98 vga_ioport_write(&d->vga, addr + 0x3c0, val & 0xff); 99 vga_ioport_write(&d->vga, addr + 0x3c1, (val >> 8) & 0xff); 100 break; 101 } 102 } 103 104 static const MemoryRegionOps pci_vga_ioport_ops = { 105 .read = pci_vga_ioport_read, 106 .write = pci_vga_ioport_write, 107 .valid.min_access_size = 1, 108 .valid.max_access_size = 4, 109 .impl.min_access_size = 1, 110 .impl.max_access_size = 2, 111 .endianness = DEVICE_LITTLE_ENDIAN, 112 }; 113 114 static uint64_t pci_vga_bochs_read(void *ptr, hwaddr addr, 115 unsigned size) 116 { 117 PCIVGAState *d = ptr; 118 int index = addr >> 1; 119 120 vbe_ioport_write_index(&d->vga, 0, index); 121 return vbe_ioport_read_data(&d->vga, 0); 122 } 123 124 static void pci_vga_bochs_write(void *ptr, hwaddr addr, 125 uint64_t val, unsigned size) 126 { 127 PCIVGAState *d = ptr; 128 int index = addr >> 1; 129 130 vbe_ioport_write_index(&d->vga, 0, index); 131 vbe_ioport_write_data(&d->vga, 0, val); 132 } 133 134 static const MemoryRegionOps pci_vga_bochs_ops = { 135 .read = pci_vga_bochs_read, 136 .write = pci_vga_bochs_write, 137 .valid.min_access_size = 1, 138 .valid.max_access_size = 4, 139 .impl.min_access_size = 2, 140 .impl.max_access_size = 2, 141 .endianness = DEVICE_LITTLE_ENDIAN, 142 }; 143 144 static int pci_std_vga_initfn(PCIDevice *dev) 145 { 146 PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev); 147 VGACommonState *s = &d->vga; 148 149 /* vga + console init */ 150 vga_common_init(s, OBJECT(dev)); 151 vga_init(s, OBJECT(dev), pci_address_space(dev), pci_address_space_io(dev), 152 true); 153 154 s->con = graphic_console_init(DEVICE(dev), s->hw_ops, s); 155 156 /* XXX: VGA_RAM_SIZE must be a power of two */ 157 pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram); 158 159 /* mmio bar for vga register access */ 160 if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_MMIO)) { 161 memory_region_init(&d->mmio, NULL, "vga.mmio", 4096); 162 memory_region_init_io(&d->ioport, NULL, &pci_vga_ioport_ops, d, 163 "vga ioports remapped", PCI_VGA_IOPORT_SIZE); 164 memory_region_init_io(&d->bochs, NULL, &pci_vga_bochs_ops, d, 165 "bochs dispi interface", PCI_VGA_BOCHS_SIZE); 166 167 memory_region_add_subregion(&d->mmio, PCI_VGA_IOPORT_OFFSET, 168 &d->ioport); 169 memory_region_add_subregion(&d->mmio, PCI_VGA_BOCHS_OFFSET, 170 &d->bochs); 171 pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio); 172 } 173 174 if (!dev->rom_bar) { 175 /* compatibility with pc-0.13 and older */ 176 vga_init_vbe(s, OBJECT(dev), pci_address_space(dev)); 177 } 178 179 return 0; 180 } 181 182 static Property vga_pci_properties[] = { 183 DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16), 184 DEFINE_PROP_BIT("mmio", PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_MMIO, true), 185 DEFINE_PROP_END_OF_LIST(), 186 }; 187 188 static void vga_class_init(ObjectClass *klass, void *data) 189 { 190 DeviceClass *dc = DEVICE_CLASS(klass); 191 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 192 193 k->no_hotplug = 1; 194 k->init = pci_std_vga_initfn; 195 k->romfile = "vgabios-stdvga.bin"; 196 k->vendor_id = PCI_VENDOR_ID_QEMU; 197 k->device_id = PCI_DEVICE_ID_QEMU_VGA; 198 k->class_id = PCI_CLASS_DISPLAY_VGA; 199 dc->vmsd = &vmstate_vga_pci; 200 dc->props = vga_pci_properties; 201 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); 202 } 203 204 static const TypeInfo vga_info = { 205 .name = "VGA", 206 .parent = TYPE_PCI_DEVICE, 207 .instance_size = sizeof(PCIVGAState), 208 .class_init = vga_class_init, 209 }; 210 211 static void vga_register_types(void) 212 { 213 type_register_static(&vga_info); 214 } 215 216 type_init(vga_register_types) 217