hw/display/vga-pci.c - qemu - Git at Google

 /*
  * QEMU PCI VGA Emulator.
  *
  * see docs/specs/standard-vga.txt for virtual hardware specs.
  *
  * Copyright (c) 2003 Fabrice Bellard
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"
 #include "hw/hw.h"
 #include "hw/pci/pci.h"
 #include "vga_int.h"
 #include "ui/pixel_ops.h"
 #include "qemu/timer.h"
 #include "hw/loader.h"
 #include "hw/display/edid.h"

 enum vga_pci_flags {
     PCI_VGA_FLAG_ENABLE_MMIO = 1,
     PCI_VGA_FLAG_ENABLE_QEXT = 2,
     PCI_VGA_FLAG_ENABLE_EDID = 3,
 };

 typedef struct PCIVGAState {
     PCIDevice dev;
     VGACommonState vga;
     uint32_t flags;
     qemu_edid_info edid_info;
     MemoryRegion mmio;
     MemoryRegion mrs[4];
     uint8_t edid[256];
 } PCIVGAState;

 #define TYPE_PCI_VGA "pci-vga"
 #define PCI_VGA(obj) OBJECT_CHECK(PCIVGAState, (obj), TYPE_PCI_VGA)

 static const VMStateDescription vmstate_vga_pci = {
     .name = "vga",
     .version_id = 2,
     .minimum_version_id = 2,
     .fields = (VMStateField[]) {
         VMSTATE_PCI_DEVICE(dev, PCIVGAState),
         VMSTATE_STRUCT(vga, PCIVGAState, 0, vmstate_vga_common, VGACommonState),
         VMSTATE_END_OF_LIST()
     }
 };

 static uint64_t pci_vga_ioport_read(void *ptr, hwaddr addr,
                                     unsigned size)
 {
     VGACommonState *s = ptr;
     uint64_t ret = 0;

     switch (size) {
     case 1:
         ret = vga_ioport_read(s, addr + 0x3c0);
         break;
     case 2:
         ret  = vga_ioport_read(s, addr + 0x3c0);
         ret |= vga_ioport_read(s, addr + 0x3c1) << 8;
         break;
     }
     return ret;
 }

 static void pci_vga_ioport_write(void *ptr, hwaddr addr,
                                  uint64_t val, unsigned size)
 {
     VGACommonState *s = ptr;

     switch (size) {
     case 1:
         vga_ioport_write(s, addr + 0x3c0, val);
         break;
     case 2:
         /*
          * Update bytes in little endian order.  Allows to update
          * indexed registers with a single word write because the
          * index byte is updated first.
          */
         vga_ioport_write(s, addr + 0x3c0, val & 0xff);
         vga_ioport_write(s, addr + 0x3c1, (val >> 8) & 0xff);
         break;
     }
 }

 static const MemoryRegionOps pci_vga_ioport_ops = {
     .read = pci_vga_ioport_read,
     .write = pci_vga_ioport_write,
     .valid.min_access_size = 1,
     .valid.max_access_size = 4,
     .impl.min_access_size = 1,
     .impl.max_access_size = 2,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static uint64_t pci_vga_bochs_read(void *ptr, hwaddr addr,
                                    unsigned size)
 {
     VGACommonState *s = ptr;
     int index = addr >> 1;

     vbe_ioport_write_index(s, 0, index);
     return vbe_ioport_read_data(s, 0);
 }

 static void pci_vga_bochs_write(void *ptr, hwaddr addr,
                                 uint64_t val, unsigned size)
 {
     VGACommonState *s = ptr;
     int index = addr >> 1;

     vbe_ioport_write_index(s, 0, index);
     vbe_ioport_write_data(s, 0, val);
 }

 static const MemoryRegionOps pci_vga_bochs_ops = {
     .read = pci_vga_bochs_read,
     .write = pci_vga_bochs_write,
     .valid.min_access_size = 1,
     .valid.max_access_size = 4,
     .impl.min_access_size = 2,
     .impl.max_access_size = 2,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static uint64_t pci_vga_qext_read(void *ptr, hwaddr addr, unsigned size)
 {
     VGACommonState *s = ptr;

     switch (addr) {
     case PCI_VGA_QEXT_REG_SIZE:
         return PCI_VGA_QEXT_SIZE;
     case PCI_VGA_QEXT_REG_BYTEORDER:
         return s->big_endian_fb ?
             PCI_VGA_QEXT_BIG_ENDIAN : PCI_VGA_QEXT_LITTLE_ENDIAN;
     default:
         return 0;
     }
 }

 static void pci_vga_qext_write(void *ptr, hwaddr addr,
                                uint64_t val, unsigned size)
 {
     VGACommonState *s = ptr;

     switch (addr) {
     case PCI_VGA_QEXT_REG_BYTEORDER:
         if (val == PCI_VGA_QEXT_BIG_ENDIAN) {
             s->big_endian_fb = true;
         }
         if (val == PCI_VGA_QEXT_LITTLE_ENDIAN) {
             s->big_endian_fb = false;
         }
         break;
     }
 }

 static bool vga_get_big_endian_fb(Object *obj, Error **errp)
 {
     PCIVGAState *d = PCI_VGA(PCI_DEVICE(obj));

     return d->vga.big_endian_fb;
 }

 static void vga_set_big_endian_fb(Object *obj, bool value, Error **errp)
 {
     PCIVGAState *d = PCI_VGA(PCI_DEVICE(obj));

     d->vga.big_endian_fb = value;
 }

 static const MemoryRegionOps pci_vga_qext_ops = {
     .read = pci_vga_qext_read,
     .write = pci_vga_qext_write,
     .valid.min_access_size = 4,
     .valid.max_access_size = 4,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 void pci_std_vga_mmio_region_init(VGACommonState *s,
                                   Object *owner,
                                   MemoryRegion *parent,
                                   MemoryRegion *subs,
                                   bool qext, bool edid)
 {
     PCIVGAState *d = container_of(s, PCIVGAState, vga);

     memory_region_init_io(&subs[0], owner, &pci_vga_ioport_ops, s,
                           "vga ioports remapped", PCI_VGA_IOPORT_SIZE);
     memory_region_add_subregion(parent, PCI_VGA_IOPORT_OFFSET,
                                 &subs[0]);

     memory_region_init_io(&subs[1], owner, &pci_vga_bochs_ops, s,
                           "bochs dispi interface", PCI_VGA_BOCHS_SIZE);
     memory_region_add_subregion(parent, PCI_VGA_BOCHS_OFFSET,
                                 &subs[1]);

     if (qext) {
         memory_region_init_io(&subs[2], owner, &pci_vga_qext_ops, s,
                               "qemu extended regs", PCI_VGA_QEXT_SIZE);
         memory_region_add_subregion(parent, PCI_VGA_QEXT_OFFSET,
                                     &subs[2]);
     }

     if (edid) {
         qemu_edid_generate(d->edid, sizeof(d->edid), &d->edid_info);
         qemu_edid_region_io(&subs[3], owner, d->edid, sizeof(d->edid));
         memory_region_add_subregion(parent, 0, &subs[3]);
     }
 }

 static void pci_std_vga_realize(PCIDevice *dev, Error **errp)
 {
     PCIVGAState *d = PCI_VGA(dev);
     VGACommonState *s = &d->vga;
     bool qext = false;
     bool edid = false;

     /* vga + console init */
     vga_common_init(s, OBJECT(dev));
     vga_init(s, OBJECT(dev), pci_address_space(dev), pci_address_space_io(dev),
              true);

     s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);

     /* XXX: VGA_RAM_SIZE must be a power of two */
     pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);

     /* mmio bar for vga register access */
     if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_MMIO)) {
         memory_region_init(&d->mmio, NULL, "vga.mmio",
                            PCI_VGA_MMIO_SIZE);

         if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
             qext = true;
             pci_set_byte(&d->dev.config[PCI_REVISION_ID], 2);
         }
         if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_EDID)) {
             edid = true;
         }
         pci_std_vga_mmio_region_init(s, OBJECT(dev), &d->mmio, d->mrs,
                                      qext, edid);

         pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
     }

     if (!dev->rom_bar) {
         /* compatibility with pc-0.13 and older */
         vga_init_vbe(s, OBJECT(dev), pci_address_space(dev));
     }
 }

 static void pci_std_vga_init(Object *obj)
 {
     /* Expose framebuffer byteorder via QOM */
     object_property_add_bool(obj, "big-endian-framebuffer",
                              vga_get_big_endian_fb, vga_set_big_endian_fb, NULL);
 }

 static void pci_secondary_vga_realize(PCIDevice *dev, Error **errp)
 {
     PCIVGAState *d = PCI_VGA(dev);
     VGACommonState *s = &d->vga;
     bool qext = false;
     bool edid = false;

     /* vga + console init */
     vga_common_init(s, OBJECT(dev));
     s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);

     /* mmio bar */
     memory_region_init(&d->mmio, OBJECT(dev), "vga.mmio",
                        PCI_VGA_MMIO_SIZE);

     if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
         qext = true;
         pci_set_byte(&d->dev.config[PCI_REVISION_ID], 2);
     }
     if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_EDID)) {
         edid = true;
     }
     pci_std_vga_mmio_region_init(s, OBJECT(dev), &d->mmio, d->mrs, qext, edid);

     pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
     pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
 }

 static void pci_secondary_vga_exit(PCIDevice *dev)
 {
     PCIVGAState *d = PCI_VGA(dev);
     VGACommonState *s = &d->vga;

     graphic_console_close(s->con);
     memory_region_del_subregion(&d->mmio, &d->mrs[0]);
     memory_region_del_subregion(&d->mmio, &d->mrs[1]);
     if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
         memory_region_del_subregion(&d->mmio, &d->mrs[2]);
     }
     if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_EDID)) {
         memory_region_del_subregion(&d->mmio, &d->mrs[3]);
     }
 }

 static void pci_secondary_vga_init(Object *obj)
 {
     /* Expose framebuffer byteorder via QOM */
     object_property_add_bool(obj, "big-endian-framebuffer",
                              vga_get_big_endian_fb, vga_set_big_endian_fb, NULL);
 }

 static void pci_secondary_vga_reset(DeviceState *dev)
 {
     PCIVGAState *d = PCI_VGA(PCI_DEVICE(dev));
     vga_common_reset(&d->vga);
 }

 static Property vga_pci_properties[] = {
     DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16),
     DEFINE_PROP_BIT("mmio", PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_MMIO, true),
     DEFINE_PROP_BIT("qemu-extended-regs",
                     PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_QEXT, true),
     DEFINE_PROP_BIT("edid",
                     PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_EDID, false),
     DEFINE_EDID_PROPERTIES(PCIVGAState, edid_info),
     DEFINE_PROP_BOOL("global-vmstate", PCIVGAState, vga.global_vmstate, false),
     DEFINE_PROP_END_OF_LIST(),
 };

 static Property secondary_pci_properties[] = {
     DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16),
     DEFINE_PROP_BIT("qemu-extended-regs",
                     PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_QEXT, true),
     DEFINE_PROP_BIT("edid",
                     PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_EDID, false),
     DEFINE_EDID_PROPERTIES(PCIVGAState, edid_info),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void vga_pci_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->vendor_id = PCI_VENDOR_ID_QEMU;
     k->device_id = PCI_DEVICE_ID_QEMU_VGA;
     dc->vmsd = &vmstate_vga_pci;
     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 }

 static const TypeInfo vga_pci_type_info = {
     .name = TYPE_PCI_VGA,
     .parent = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIVGAState),
     .abstract = true,
     .class_init = vga_pci_class_init,
     .interfaces = (InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static void vga_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->realize = pci_std_vga_realize;
     k->romfile = "vgabios-stdvga.bin";
     k->class_id = PCI_CLASS_DISPLAY_VGA;
     dc->props = vga_pci_properties;
     dc->hotpluggable = false;
 }

 static void secondary_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->realize = pci_secondary_vga_realize;
     k->exit = pci_secondary_vga_exit;
     k->class_id = PCI_CLASS_DISPLAY_OTHER;
     dc->props = secondary_pci_properties;
     dc->reset = pci_secondary_vga_reset;
 }

 static const TypeInfo vga_info = {
     .name          = "VGA",
     .parent        = TYPE_PCI_VGA,
     .instance_init = pci_std_vga_init,
     .class_init    = vga_class_init,
 };

 static const TypeInfo secondary_info = {
     .name          = "secondary-vga",
     .parent        = TYPE_PCI_VGA,
     .instance_init = pci_secondary_vga_init,
     .class_init    = secondary_class_init,
 };

 static void vga_register_types(void)
 {
     type_register_static(&vga_pci_type_info);
     type_register_static(&vga_info);
     type_register_static(&secondary_info);
 }

 type_init(vga_register_types)
	/*
	* QEMU PCI VGA Emulator.
	*
	* see docs/specs/standard-vga.txt for virtual hardware specs.
	*
	* Copyright (c) 2003 Fabrice Bellard
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/
	#include "qemu/osdep.h"
	#include "hw/hw.h"
	#include "hw/pci/pci.h"
	#include "vga_int.h"
	#include "ui/pixel_ops.h"
	#include "qemu/timer.h"
	#include "hw/loader.h"
	#include "hw/display/edid.h"

	enum vga_pci_flags {
	PCI_VGA_FLAG_ENABLE_MMIO = 1,
	PCI_VGA_FLAG_ENABLE_QEXT = 2,
	PCI_VGA_FLAG_ENABLE_EDID = 3,
	};

	typedef struct PCIVGAState {
	PCIDevice dev;
	VGACommonState vga;
	uint32_t flags;
	qemu_edid_info edid_info;
	MemoryRegion mmio;
	MemoryRegion mrs[4];
	uint8_t edid[256];
	} PCIVGAState;

	#define TYPE_PCI_VGA "pci-vga"
	#define PCI_VGA(obj) OBJECT_CHECK(PCIVGAState, (obj), TYPE_PCI_VGA)

	static const VMStateDescription vmstate_vga_pci = {
	.name = "vga",
	.version_id = 2,
	.minimum_version_id = 2,
	.fields = (VMStateField[]) {
	VMSTATE_PCI_DEVICE(dev, PCIVGAState),
	VMSTATE_STRUCT(vga, PCIVGAState, 0, vmstate_vga_common, VGACommonState),
	VMSTATE_END_OF_LIST()
	}
	};

	static uint64_t pci_vga_ioport_read(void *ptr, hwaddr addr,
	unsigned size)
	{
	VGACommonState *s = ptr;
	uint64_t ret = 0;

	switch (size) {
	case 1:
	ret = vga_ioport_read(s, addr + 0x3c0);
	break;
	case 2:
	ret = vga_ioport_read(s, addr + 0x3c0);
	ret \|= vga_ioport_read(s, addr + 0x3c1) << 8;
	break;
	}
	return ret;
	}

	static void pci_vga_ioport_write(void *ptr, hwaddr addr,
	uint64_t val, unsigned size)
	{
	VGACommonState *s = ptr;

	switch (size) {
	case 1:
	vga_ioport_write(s, addr + 0x3c0, val);
	break;
	case 2:
	/*
	* Update bytes in little endian order. Allows to update
	* indexed registers with a single word write because the
	* index byte is updated first.
	*/
	vga_ioport_write(s, addr + 0x3c0, val & 0xff);
	vga_ioport_write(s, addr + 0x3c1, (val >> 8) & 0xff);
	break;
	}
	}

	static const MemoryRegionOps pci_vga_ioport_ops = {
	.read = pci_vga_ioport_read,
	.write = pci_vga_ioport_write,
	.valid.min_access_size = 1,
	.valid.max_access_size = 4,
	.impl.min_access_size = 1,
	.impl.max_access_size = 2,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static uint64_t pci_vga_bochs_read(void *ptr, hwaddr addr,
	unsigned size)
	{
	VGACommonState *s = ptr;
	int index = addr >> 1;

	vbe_ioport_write_index(s, 0, index);
	return vbe_ioport_read_data(s, 0);
	}

	static void pci_vga_bochs_write(void *ptr, hwaddr addr,
	uint64_t val, unsigned size)
	{
	VGACommonState *s = ptr;
	int index = addr >> 1;

	vbe_ioport_write_index(s, 0, index);
	vbe_ioport_write_data(s, 0, val);
	}

	static const MemoryRegionOps pci_vga_bochs_ops = {
	.read = pci_vga_bochs_read,
	.write = pci_vga_bochs_write,
	.valid.min_access_size = 1,
	.valid.max_access_size = 4,
	.impl.min_access_size = 2,
	.impl.max_access_size = 2,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static uint64_t pci_vga_qext_read(void *ptr, hwaddr addr, unsigned size)
	{
	VGACommonState *s = ptr;

	switch (addr) {
	case PCI_VGA_QEXT_REG_SIZE:
	return PCI_VGA_QEXT_SIZE;
	case PCI_VGA_QEXT_REG_BYTEORDER:
	return s->big_endian_fb ?
	PCI_VGA_QEXT_BIG_ENDIAN : PCI_VGA_QEXT_LITTLE_ENDIAN;
	default:
	return 0;
	}
	}

	static void pci_vga_qext_write(void *ptr, hwaddr addr,
	uint64_t val, unsigned size)
	{
	VGACommonState *s = ptr;

	switch (addr) {
	case PCI_VGA_QEXT_REG_BYTEORDER:
	if (val == PCI_VGA_QEXT_BIG_ENDIAN) {
	s->big_endian_fb = true;
	}
	if (val == PCI_VGA_QEXT_LITTLE_ENDIAN) {
	s->big_endian_fb = false;
	}
	break;
	}
	}

	static bool vga_get_big_endian_fb(Object obj, Error *errp)
	{
	PCIVGAState *d = PCI_VGA(PCI_DEVICE(obj));

	return d->vga.big_endian_fb;
	}

	static void vga_set_big_endian_fb(Object obj, bool value, Error *errp)
	{
	PCIVGAState *d = PCI_VGA(PCI_DEVICE(obj));

	d->vga.big_endian_fb = value;
	}

	static const MemoryRegionOps pci_vga_qext_ops = {
	.read = pci_vga_qext_read,
	.write = pci_vga_qext_write,
	.valid.min_access_size = 4,
	.valid.max_access_size = 4,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	void pci_std_vga_mmio_region_init(VGACommonState *s,
	Object *owner,
	MemoryRegion *parent,
	MemoryRegion *subs,
	bool qext, bool edid)
	{
	PCIVGAState *d = container_of(s, PCIVGAState, vga);

	memory_region_init_io(&subs[0], owner, &pci_vga_ioport_ops, s,
	"vga ioports remapped", PCI_VGA_IOPORT_SIZE);
	memory_region_add_subregion(parent, PCI_VGA_IOPORT_OFFSET,
	&subs[0]);

	memory_region_init_io(&subs[1], owner, &pci_vga_bochs_ops, s,
	"bochs dispi interface", PCI_VGA_BOCHS_SIZE);
	memory_region_add_subregion(parent, PCI_VGA_BOCHS_OFFSET,
	&subs[1]);

	if (qext) {
	memory_region_init_io(&subs[2], owner, &pci_vga_qext_ops, s,
	"qemu extended regs", PCI_VGA_QEXT_SIZE);
	memory_region_add_subregion(parent, PCI_VGA_QEXT_OFFSET,
	&subs[2]);
	}

	if (edid) {
	qemu_edid_generate(d->edid, sizeof(d->edid), &d->edid_info);
	qemu_edid_region_io(&subs[3], owner, d->edid, sizeof(d->edid));
	memory_region_add_subregion(parent, 0, &subs[3]);
	}
	}

	static void pci_std_vga_realize(PCIDevice dev, Error *errp)
	{
	PCIVGAState *d = PCI_VGA(dev);
	VGACommonState *s = &d->vga;
	bool qext = false;
	bool edid = false;

	/* vga + console init */
	vga_common_init(s, OBJECT(dev));
	vga_init(s, OBJECT(dev), pci_address_space(dev), pci_address_space_io(dev),
	true);

	s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);

	/* XXX: VGA_RAM_SIZE must be a power of two */
	pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);

	/* mmio bar for vga register access */
	if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_MMIO)) {
	memory_region_init(&d->mmio, NULL, "vga.mmio",
	PCI_VGA_MMIO_SIZE);

	if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
	qext = true;
	pci_set_byte(&d->dev.config[PCI_REVISION_ID], 2);
	}
	if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_EDID)) {
	edid = true;
	}
	pci_std_vga_mmio_region_init(s, OBJECT(dev), &d->mmio, d->mrs,
	qext, edid);

	pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
	}

	if (!dev->rom_bar) {
	/* compatibility with pc-0.13 and older */
	vga_init_vbe(s, OBJECT(dev), pci_address_space(dev));
	}
	}

	static void pci_std_vga_init(Object *obj)
	{
	/* Expose framebuffer byteorder via QOM */
	object_property_add_bool(obj, "big-endian-framebuffer",
	vga_get_big_endian_fb, vga_set_big_endian_fb, NULL);
	}

	static void pci_secondary_vga_realize(PCIDevice dev, Error *errp)
	{
	PCIVGAState *d = PCI_VGA(dev);
	VGACommonState *s = &d->vga;
	bool qext = false;
	bool edid = false;

	/* vga + console init */
	vga_common_init(s, OBJECT(dev));
	s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);

	/* mmio bar */
	memory_region_init(&d->mmio, OBJECT(dev), "vga.mmio",
	PCI_VGA_MMIO_SIZE);

	if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
	qext = true;
	pci_set_byte(&d->dev.config[PCI_REVISION_ID], 2);
	}
	if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_EDID)) {
	edid = true;
	}
	pci_std_vga_mmio_region_init(s, OBJECT(dev), &d->mmio, d->mrs, qext, edid);

	pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
	pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
	}

	static void pci_secondary_vga_exit(PCIDevice *dev)
	{
	PCIVGAState *d = PCI_VGA(dev);
	VGACommonState *s = &d->vga;

	graphic_console_close(s->con);
	memory_region_del_subregion(&d->mmio, &d->mrs[0]);
	memory_region_del_subregion(&d->mmio, &d->mrs[1]);
	if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
	memory_region_del_subregion(&d->mmio, &d->mrs[2]);
	}
	if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_EDID)) {
	memory_region_del_subregion(&d->mmio, &d->mrs[3]);
	}
	}

	static void pci_secondary_vga_init(Object *obj)
	{
	/* Expose framebuffer byteorder via QOM */
	object_property_add_bool(obj, "big-endian-framebuffer",
	vga_get_big_endian_fb, vga_set_big_endian_fb, NULL);
	}

	static void pci_secondary_vga_reset(DeviceState *dev)
	{
	PCIVGAState *d = PCI_VGA(PCI_DEVICE(dev));
	vga_common_reset(&d->vga);
	}

	static Property vga_pci_properties[] = {
	DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16),
	DEFINE_PROP_BIT("mmio", PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_MMIO, true),
	DEFINE_PROP_BIT("qemu-extended-regs",
	PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_QEXT, true),
	DEFINE_PROP_BIT("edid",
	PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_EDID, false),
	DEFINE_EDID_PROPERTIES(PCIVGAState, edid_info),
	DEFINE_PROP_BOOL("global-vmstate", PCIVGAState, vga.global_vmstate, false),
	DEFINE_PROP_END_OF_LIST(),
	};

	static Property secondary_pci_properties[] = {
	DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16),
	DEFINE_PROP_BIT("qemu-extended-regs",
	PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_QEXT, true),
	DEFINE_PROP_BIT("edid",
	PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_EDID, false),
	DEFINE_EDID_PROPERTIES(PCIVGAState, edid_info),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void vga_pci_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->vendor_id = PCI_VENDOR_ID_QEMU;
	k->device_id = PCI_DEVICE_ID_QEMU_VGA;
	dc->vmsd = &vmstate_vga_pci;
	set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
	}

	static const TypeInfo vga_pci_type_info = {
	.name = TYPE_PCI_VGA,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIVGAState),
	.abstract = true,
	.class_init = vga_pci_class_init,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static void vga_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->realize = pci_std_vga_realize;
	k->romfile = "vgabios-stdvga.bin";
	k->class_id = PCI_CLASS_DISPLAY_VGA;
	dc->props = vga_pci_properties;
	dc->hotpluggable = false;
	}

	static void secondary_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->realize = pci_secondary_vga_realize;
	k->exit = pci_secondary_vga_exit;
	k->class_id = PCI_CLASS_DISPLAY_OTHER;
	dc->props = secondary_pci_properties;
	dc->reset = pci_secondary_vga_reset;
	}

	static const TypeInfo vga_info = {
	.name = "VGA",
	.parent = TYPE_PCI_VGA,
	.instance_init = pci_std_vga_init,
	.class_init = vga_class_init,
	};

	static const TypeInfo secondary_info = {
	.name = "secondary-vga",
	.parent = TYPE_PCI_VGA,
	.instance_init = pci_secondary_vga_init,
	.class_init = secondary_class_init,
	};

	static void vga_register_types(void)
	{
	type_register_static(&vga_pci_type_info);
	type_register_static(&vga_info);
	type_register_static(&secondary_info);
	}

	type_init(vga_register_types)