| 1 | /* |
| 2 | * QEMU MMIO VGA Emulator. |
| 3 | * |
| 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #include "qemu/osdep.h" |
| 26 | #include "qapi/error.h" |
| 27 | #include "hw/core/sysbus.h" |
| 28 | #include "hw/display/vga.h" |
| 29 | #include "hw/core/qdev-properties.h" |
| 30 | #include "ui/console.h" |
| 31 | #include "vga_int.h" |
| 32 | |
| 33 | /* |
| 34 | * QEMU interface: |
| 35 | * + sysbus MMIO region 0: VGA I/O registers |
| 36 | * + sysbus MMIO region 1: VGA MMIO registers |
| 37 | * + sysbus MMIO region 2: VGA memory |
| 38 | */ |
| 39 | |
| 40 | OBJECT_DECLARE_SIMPLE_TYPE(VGAMmioState, VGA_MMIO) |
| 41 | |
| 42 | struct VGAMmioState { |
| 43 | /*< private >*/ |
| 44 | SysBusDevice parent_obj; |
| 45 | |
| 46 | /*< public >*/ |
| 47 | VGACommonState vga; |
| 48 | MemoryRegion iomem; |
| 49 | MemoryRegion lowmem; |
| 50 | |
| 51 | uint8_t it_shift; |
| 52 | }; |
| 53 | |
| 54 | static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size) |
| 55 | { |
| 56 | VGAMmioState *s = opaque; |
| 57 | |
| 58 | return vga_ioport_read(&s->vga, addr >> s->it_shift) & |
| 59 | MAKE_64BIT_MASK(0, size * 8); |
| 60 | } |
| 61 | |
| 62 | static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value, |
| 63 | unsigned size) |
| 64 | { |
| 65 | VGAMmioState *s = opaque; |
| 66 | |
| 67 | vga_ioport_write(&s->vga, addr >> s->it_shift, |
| 68 | value & MAKE_64BIT_MASK(0, size * 8)); |
| 69 | } |
| 70 | |
| 71 | static const MemoryRegionOps vga_mm_ctrl_ops = { |
| 72 | .read = vga_mm_read, |
| 73 | .write = vga_mm_write, |
| 74 | .valid.min_access_size = 1, |
| 75 | .valid.max_access_size = 4, |
| 76 | .impl.min_access_size = 1, |
| 77 | .impl.max_access_size = 4, |
| 78 | .endianness = DEVICE_NATIVE_ENDIAN, |
| 79 | }; |
| 80 | |
| 81 | static void vga_mmio_reset(DeviceState *dev) |
| 82 | { |
| 83 | VGAMmioState *s = VGA_MMIO(dev); |
| 84 | |
| 85 | vga_common_reset(&s->vga); |
| 86 | } |
| 87 | |
| 88 | static void vga_mmio_realizefn(DeviceState *dev, Error **errp) |
| 89 | { |
| 90 | VGAMmioState *s = VGA_MMIO(dev); |
| 91 | SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
| 92 | |
| 93 | memory_region_init_io(&s->iomem, OBJECT(dev), &vga_mm_ctrl_ops, s, |
| 94 | "vga-mmio", 0x100000); |
| 95 | memory_region_set_flush_coalesced(&s->iomem); |
| 96 | sysbus_init_mmio(sbd, &s->iomem); |
| 97 | |
| 98 | /* XXX: endianness? */ |
| 99 | memory_region_init_io(&s->lowmem, OBJECT(dev), &vga_mem_ops, &s->vga, |
| 100 | "vga-lowmem", 0x20000); |
| 101 | memory_region_set_coalescing(&s->lowmem); |
| 102 | sysbus_init_mmio(sbd, &s->lowmem); |
| 103 | |
| 104 | s->vga.bank_offset = 0; |
| 105 | s->vga.global_vmstate = true; |
| 106 | if (!vga_common_init(&s->vga, OBJECT(dev), errp)) { |
| 107 | return; |
| 108 | } |
| 109 | |
| 110 | sysbus_init_mmio(sbd, &s->vga.vram); |
| 111 | s->vga.con = qemu_graphic_console_create(dev, 0, s->vga.hw_ops, &s->vga); |
| 112 | } |
| 113 | |
| 114 | static const Property vga_mmio_properties[] = { |
| 115 | DEFINE_PROP_UINT8("it_shift", VGAMmioState, it_shift, 0), |
| 116 | DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8), |
| 117 | }; |
| 118 | |
| 119 | static void vga_mmio_class_initfn(ObjectClass *klass, const void *data) |
| 120 | { |
| 121 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 122 | |
| 123 | dc->realize = vga_mmio_realizefn; |
| 124 | device_class_set_legacy_reset(dc, vga_mmio_reset); |
| 125 | dc->vmsd = &vmstate_vga_common; |
| 126 | device_class_set_props(dc, vga_mmio_properties); |
| 127 | set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); |
| 128 | } |
| 129 | |
| 130 | static const TypeInfo vga_mmio_info = { |
| 131 | .name = TYPE_VGA_MMIO, |
| 132 | .parent = TYPE_SYS_BUS_DEVICE, |
| 133 | .instance_size = sizeof(VGAMmioState), |
| 134 | .class_init = vga_mmio_class_initfn, |
| 135 | }; |
| 136 | |
| 137 | static void vga_mmio_register_types(void) |
| 138 | { |
| 139 | type_register_static(&vga_mmio_info); |
| 140 | } |
| 141 | |
| 142 | type_init(vga_mmio_register_types) |