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qemu-e2k/hw/display/vga-pci.c
Gerd Hoffmann 63e3e24db2 vga: add secondary stdvga variant 
Add a standard vga variant which doesn't occupy any legacy
resources and thus can easily be used as secondary (or legacy-free)
graphics adapter.  Programming must be done using the MMIO bar.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-04-28 11:03:32 +02:00

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/*
* 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/hw.h"
#include "ui/console.h"
#include "hw/pci/pci.h"
#include "vga_int.h"
#include "ui/pixel_ops.h"
#include "qemu/timer.h"
#include "hw/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, OBJECT(dev), true);
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", 4096);
memory_region_init_io(&d->ioport, NULL, &pci_vga_ioport_ops, d,
"vga ioports remapped", PCI_VGA_IOPORT_SIZE);
memory_region_init_io(&d->bochs, NULL, &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, OBJECT(dev), pci_address_space(dev));
}
return 0;
}
static int pci_secondary_vga_initfn(PCIDevice *dev)
{
PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
VGACommonState *s = &d->vga;
/* vga + console init */
vga_common_init(s, OBJECT(dev), false);
s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);
/* mmio bar */
memory_region_init(&d->mmio, OBJECT(dev), "vga.mmio", 4096);
memory_region_init_io(&d->ioport, OBJECT(dev), &pci_vga_ioport_ops, d,
"vga ioports remapped", PCI_VGA_IOPORT_SIZE);
memory_region_init_io(&d->bochs, OBJECT(dev), &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, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
return 0;
}
static void pci_secondary_vga_reset(DeviceState *dev)
{
PCIVGAState *d = DO_UPCAST(PCIVGAState, dev.qdev, 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_END_OF_LIST(),
};
static Property secondary_pci_properties[] = {
DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16),
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->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;
dc->hotpluggable = false;
set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
}
static void secondary_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = pci_secondary_vga_initfn;
k->vendor_id = PCI_VENDOR_ID_QEMU;
k->device_id = PCI_DEVICE_ID_QEMU_VGA;
k->class_id = PCI_CLASS_DISPLAY_OTHER;
dc->vmsd = &vmstate_vga_pci;
dc->props = secondary_pci_properties;
dc->reset = pci_secondary_vga_reset;
}
static const TypeInfo vga_info = {
.name = "VGA",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIVGAState),
.class_init = vga_class_init,
};
static const TypeInfo secondary_info = {
.name = "secondary-vga",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIVGAState),
.class_init = secondary_class_init,
};
static void vga_register_types(void)
{
type_register_static(&vga_info);
type_register_static(&secondary_info);
}
type_init(vga_register_types)
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