diff options
Diffstat (limited to 'hw/display/vga-pci.c')
| -rw-r--r-- | hw/display/vga-pci.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/hw/display/vga-pci.c b/hw/display/vga-pci.c new file mode 100644 index 0000000000..05fa9bcb64 --- /dev/null +++ b/hw/display/vga-pci.c @@ -0,0 +1,215 @@ +/* + * 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 "hw/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); + vga_init(s, pci_address_space(dev), pci_address_space_io(dev), true); + + s->con = 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 const 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) |