hw/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 "hw.h"
 #include "ui/console.h"
 #include "pci/pci.h"
 #include "vga_int.h"
 #include "ui/pixel_ops.h"
 #include "qemu/timer.h"
 #include "loader.h"

 #define PCI_VGA_IOPORT_OFFSET 0x400
 #define PCI_VGA_IOPORT_SIZE   (0x3e0 - 0x3c0)
 #define PCI_VGA_BOCHS_OFFSET  0x500
 #define PCI_VGA_BOCHS_SIZE    (0x0b * 2)
 #define PCI_VGA_MMIO_SIZE     0x1000

 enum vga_pci_flags {
     PCI_VGA_FLAG_ENABLE_MMIO = 1,
 };

 typedef struct PCIVGAState {
     PCIDevice dev;
     VGACommonState vga;
     uint32_t flags;
     MemoryRegion mmio;
     MemoryRegion ioport;
     MemoryRegion bochs;
 } PCIVGAState;

 static const VMStateDescription vmstate_vga_pci = {
     .name = "vga",
     .version_id = 2,
     .minimum_version_id = 2,
     .minimum_version_id_old = 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)
 {
     PCIVGAState *d = ptr;
     uint64_t ret = 0;

     switch (size) {
     case 1:
         ret = vga_ioport_read(&d->vga, addr);
         break;
     case 2:
         ret  = vga_ioport_read(&d->vga, addr);
         ret |= vga_ioport_read(&d->vga, addr+1) << 8;
         break;
     }
     return ret;
 }

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

     switch (size) {
     case 1:
         vga_ioport_write(&d->vga, 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(&d->vga, addr + 0x3c0, val & 0xff);
         vga_ioport_write(&d->vga, 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)
 {
     PCIVGAState *d = ptr;
     int index = addr >> 1;

     vbe_ioport_write_index(&d->vga, 0, index);
     return vbe_ioport_read_data(&d->vga, 0);
 }

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

     vbe_ioport_write_index(&d->vga, 0, index);
     vbe_ioport_write_data(&d->vga, 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 int pci_std_vga_initfn(PCIDevice *dev)
 {
     PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
     VGACommonState *s = &d->vga;

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

     s->ds = graphic_console_init(s->update, s->invalidate,
                                  s->screen_dump, s->text_update, 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, "vga.mmio", 4096);
         memory_region_init_io(&d->ioport, &pci_vga_ioport_ops, d,
                               "vga ioports remapped", PCI_VGA_IOPORT_SIZE);
         memory_region_init_io(&d->bochs, &pci_vga_bochs_ops, d,
                               "bochs dispi interface", PCI_VGA_BOCHS_SIZE);

         memory_region_add_subregion(&d->mmio, PCI_VGA_IOPORT_OFFSET,
                                     &d->ioport);
         memory_region_add_subregion(&d->mmio, PCI_VGA_BOCHS_OFFSET,
                                     &d->bochs);
         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, pci_address_space(dev));
     }

     return 0;
 }

 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_END_OF_LIST(),
 };

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

     k->no_hotplug = 1;
     k->init = pci_std_vga_initfn;
     k->romfile = "vgabios-stdvga.bin";
     k->vendor_id = PCI_VENDOR_ID_QEMU;
     k->device_id = PCI_DEVICE_ID_QEMU_VGA;
     k->class_id = PCI_CLASS_DISPLAY_VGA;
     dc->vmsd = &vmstate_vga_pci;
     dc->props = vga_pci_properties;
 }

 static TypeInfo vga_info = {
     .name          = "VGA",
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIVGAState),
     .class_init    = vga_class_init,
 };

 static void vga_register_types(void)
 {
     type_register_static(&vga_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 "hw.h"
	#include "ui/console.h"
	#include "pci/pci.h"
	#include "vga_int.h"
	#include "ui/pixel_ops.h"
	#include "qemu/timer.h"
	#include "loader.h"

	#define PCI_VGA_IOPORT_OFFSET 0x400
	#define PCI_VGA_IOPORT_SIZE (0x3e0 - 0x3c0)
	#define PCI_VGA_BOCHS_OFFSET 0x500
	#define PCI_VGA_BOCHS_SIZE (0x0b * 2)
	#define PCI_VGA_MMIO_SIZE 0x1000

	enum vga_pci_flags {
	PCI_VGA_FLAG_ENABLE_MMIO = 1,
	};

	typedef struct PCIVGAState {
	PCIDevice dev;
	VGACommonState vga;
	uint32_t flags;
	MemoryRegion mmio;
	MemoryRegion ioport;
	MemoryRegion bochs;
	} PCIVGAState;

	static const VMStateDescription vmstate_vga_pci = {
	.name = "vga",
	.version_id = 2,
	.minimum_version_id = 2,
	.minimum_version_id_old = 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)
	{
	PCIVGAState *d = ptr;
	uint64_t ret = 0;

	switch (size) {
	case 1:
	ret = vga_ioport_read(&d->vga, addr);
	break;
	case 2:
	ret = vga_ioport_read(&d->vga, addr);
	ret \|= vga_ioport_read(&d->vga, addr+1) << 8;
	break;
	}
	return ret;
	}

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

	switch (size) {
	case 1:
	vga_ioport_write(&d->vga, 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(&d->vga, addr + 0x3c0, val & 0xff);
	vga_ioport_write(&d->vga, 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)
	{
	PCIVGAState *d = ptr;
	int index = addr >> 1;

	vbe_ioport_write_index(&d->vga, 0, index);
	return vbe_ioport_read_data(&d->vga, 0);
	}

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

	vbe_ioport_write_index(&d->vga, 0, index);
	vbe_ioport_write_data(&d->vga, 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 int pci_std_vga_initfn(PCIDevice *dev)
	{
	PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
	VGACommonState *s = &d->vga;

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

	s->ds = graphic_console_init(s->update, s->invalidate,
	s->screen_dump, s->text_update, 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, "vga.mmio", 4096);
	memory_region_init_io(&d->ioport, &pci_vga_ioport_ops, d,
	"vga ioports remapped", PCI_VGA_IOPORT_SIZE);
	memory_region_init_io(&d->bochs, &pci_vga_bochs_ops, d,
	"bochs dispi interface", PCI_VGA_BOCHS_SIZE);

	memory_region_add_subregion(&d->mmio, PCI_VGA_IOPORT_OFFSET,
	&d->ioport);
	memory_region_add_subregion(&d->mmio, PCI_VGA_BOCHS_OFFSET,
	&d->bochs);
	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, pci_address_space(dev));
	}

	return 0;
	}

	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_END_OF_LIST(),
	};

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

	k->no_hotplug = 1;
	k->init = pci_std_vga_initfn;
	k->romfile = "vgabios-stdvga.bin";
	k->vendor_id = PCI_VENDOR_ID_QEMU;
	k->device_id = PCI_DEVICE_ID_QEMU_VGA;
	k->class_id = PCI_CLASS_DISPLAY_VGA;
	dc->vmsd = &vmstate_vga_pci;
	dc->props = vga_pci_properties;
	}

	static TypeInfo vga_info = {
	.name = "VGA",
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIVGAState),
	.class_init = vga_class_init,
	};

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

	type_init(vga_register_types)