diff options
Diffstat (limited to 'hw/display/vga-mmio.c')
| -rw-r--r-- | hw/display/vga-mmio.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/hw/display/vga-mmio.c b/hw/display/vga-mmio.c new file mode 100644 index 0000000..4969368 --- /dev/null +++ b/hw/display/vga-mmio.c @@ -0,0 +1,139 @@ +/* + * QEMU MMIO 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 "qemu/osdep.h" +#include "qapi/error.h" +#include "hw/sysbus.h" +#include "hw/display/vga.h" +#include "hw/qdev-properties.h" +#include "vga_int.h" + +/* + * QEMU interface: + * + sysbus MMIO region 0: VGA I/O registers + * + sysbus MMIO region 1: VGA MMIO registers + * + sysbus MMIO region 2: VGA memory + */ + +OBJECT_DECLARE_SIMPLE_TYPE(VGAMmioState, VGA_MMIO) + +struct VGAMmioState { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + VGACommonState vga; + MemoryRegion iomem; + MemoryRegion lowmem; + + uint8_t it_shift; +}; + +static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size) +{ + VGAMmioState *s = opaque; + + return vga_ioport_read(&s->vga, addr >> s->it_shift) & + MAKE_64BIT_MASK(0, size * 8); +} + +static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value, + unsigned size) +{ + VGAMmioState *s = opaque; + + vga_ioport_write(&s->vga, addr >> s->it_shift, + value & MAKE_64BIT_MASK(0, size * 8)); +} + +static const MemoryRegionOps vga_mm_ctrl_ops = { + .read = vga_mm_read, + .write = vga_mm_write, + .valid.min_access_size = 1, + .valid.max_access_size = 4, + .impl.min_access_size = 1, + .impl.max_access_size = 4, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static void vga_mmio_reset(DeviceState *dev) +{ + VGAMmioState *s = VGA_MMIO(dev); + + vga_common_reset(&s->vga); +} + +static void vga_mmio_realizefn(DeviceState *dev, Error **errp) +{ + VGAMmioState *s = VGA_MMIO(dev); + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); + + memory_region_init_io(&s->iomem, OBJECT(dev), &vga_mm_ctrl_ops, s, + "vga-mmio", 0x100000); + memory_region_set_flush_coalesced(&s->iomem); + sysbus_init_mmio(sbd, &s->iomem); + + /* XXX: endianness? */ + memory_region_init_io(&s->lowmem, OBJECT(dev), &vga_mem_ops, &s->vga, + "vga-lowmem", 0x20000); + memory_region_set_coalescing(&s->lowmem); + sysbus_init_mmio(sbd, &s->lowmem); + + s->vga.bank_offset = 0; + s->vga.global_vmstate = true; + vga_common_init(&s->vga, OBJECT(dev)); + sysbus_init_mmio(sbd, &s->vga.vram); + s->vga.con = graphic_console_init(dev, 0, s->vga.hw_ops, &s->vga); +} + +static Property vga_mmio_properties[] = { + DEFINE_PROP_UINT8("it_shift", VGAMmioState, it_shift, 0), + DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vga_mmio_class_initfn(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = vga_mmio_realizefn; + dc->reset = vga_mmio_reset; + dc->vmsd = &vmstate_vga_common; + device_class_set_props(dc, vga_mmio_properties); + set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); +} + +static const TypeInfo vga_mmio_info = { + .name = TYPE_VGA_MMIO, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(VGAMmioState), + .class_init = vga_mmio_class_initfn, +}; + +static void vga_mmio_register_types(void) +{ + type_register_static(&vga_mmio_info); +} + +type_init(vga_mmio_register_types) |