Archipelago » qemu

/*

 * QEMU PCI VGA Emulator.

 *

 * 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 "console.h"

#include "pc.h"

#include "pci.h"

#include "vga_int.h"

#include "pixel_ops.h"

#include "qemu-timer.h"

#include "loader.h"

typedef struct PCIVGAState {

    PCIDevice dev;

    VGACommonState vga;

} 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 void vga_map(PCIDevice *pci_dev, int region_num,

                    pcibus_t addr, pcibus_t size, int type)

{

    PCIVGAState *d = (PCIVGAState *)pci_dev;

    VGACommonState *s = &d->vga;

    if (region_num == PCI_ROM_SLOT) {

        cpu_register_physical_memory(addr, s->bios_size, s->bios_offset);

    } else {

        cpu_register_physical_memory(addr, s->vram_size, s->vram_offset);

        s->map_addr = addr;

        s->map_end = addr + s->vram_size;

        vga_dirty_log_start(s);

    }

}

static void pci_vga_write_config(PCIDevice *d,

                                 uint32_t address, uint32_t val, int len)

{

    PCIVGAState *pvs = container_of(d, PCIVGAState, dev);

    VGACommonState *s = &pvs->vga;

    pci_default_write_config(d, address, val, len);

    if (s->map_addr && pvs->dev.io_regions[0].addr == -1)

        s->map_addr = 0;

}

static int pci_vga_initfn(PCIDevice *dev)

{

     PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);

     VGACommonState *s = &d->vga;

     uint8_t *pci_conf = d->dev.config;

     // vga + console init

     vga_common_init(s, VGA_RAM_SIZE);

     vga_init(s);

     s->ds = graphic_console_init(s->update, s->invalidate,

                                  s->screen_dump, s->text_update, s);

     // dummy VGA (same as Bochs ID)

     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_QEMU);

     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_QEMU_VGA);

     pci_config_set_class(pci_conf, PCI_CLASS_DISPLAY_VGA);

     /* XXX: VGA_RAM_SIZE must be a power of two */

     pci_register_bar(&d->dev, 0, VGA_RAM_SIZE,

                      PCI_BASE_ADDRESS_MEM_PREFETCH, vga_map);

     if (s->bios_size) {

        unsigned int bios_total_size;

        /* must be a power of two */

        bios_total_size = 1;

        while (bios_total_size < s->bios_size)

            bios_total_size <<= 1;

        pci_register_bar(&d->dev, PCI_ROM_SLOT, bios_total_size,

                         PCI_BASE_ADDRESS_MEM_PREFETCH, vga_map);

     } else {

         if (dev->romfile == NULL)

             dev->romfile = qemu_strdup("vgabios-stdvga.bin");

     }

     return 0;

}

int pci_vga_init(PCIBus *bus,

                 unsigned long vga_bios_offset, int vga_bios_size)

{

    PCIDevice *dev;

    dev = pci_create(bus, -1, "VGA");

    qdev_prop_set_uint32(&dev->qdev, "bios-offset", vga_bios_offset);

    qdev_prop_set_uint32(&dev->qdev, "bios-size", vga_bios_size);

    qdev_init_nofail(&dev->qdev);

    return 0;

}

static PCIDeviceInfo vga_info = {

    .qdev.name    = "VGA",

    .qdev.size    = sizeof(PCIVGAState),

    .qdev.vmsd    = &vmstate_vga_pci,

    .init         = pci_vga_initfn,

    .config_write = pci_vga_write_config,

    .qdev.props   = (Property[]) {

        DEFINE_PROP_HEX32("bios-offset", PCIVGAState, vga.bios_offset, 0),

        DEFINE_PROP_HEX32("bios-size",   PCIVGAState, vga.bios_size,   0),

        DEFINE_PROP_END_OF_LIST(),

    }

};

static void vga_register(void)

{

    pci_qdev_register(&vga_info);

}

device_init(vga_register);