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/display/vga.h" 28 #include "hw/sysbus.h" 29 #include "hw/display/vga.h" 30 #include "hw/qdev-properties.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 int vga_mmio_init(hwaddr vram_base, hwaddr ctrl_base, 89 int it_shift, MemoryRegion *address_space) 90 { 91 DeviceState *dev; 92 SysBusDevice *s; 93 94 dev = qdev_new(TYPE_VGA_MMIO); 95 qdev_prop_set_uint8(dev, "it_shift", it_shift); 96 s = SYS_BUS_DEVICE(dev); 97 sysbus_realize_and_unref(s, &error_fatal); 98 99 sysbus_mmio_map(s, 0, ctrl_base); 100 sysbus_mmio_map(s, 1, vram_base + 0x000a0000); 101 sysbus_mmio_map(s, 2, VBE_DISPI_LFB_PHYSICAL_ADDRESS); 102 103 return 0; 104 } 105 106 static void vga_mmio_realizefn(DeviceState *dev, Error **errp) 107 { 108 VGAMmioState *s = VGA_MMIO(dev); 109 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 110 111 memory_region_init_io(&s->iomem, OBJECT(dev), &vga_mm_ctrl_ops, s, 112 "vga-mmio", 0x100000); 113 memory_region_set_flush_coalesced(&s->iomem); 114 sysbus_init_mmio(sbd, &s->iomem); 115 116 /* XXX: endianness? */ 117 memory_region_init_io(&s->lowmem, OBJECT(dev), &vga_mem_ops, &s->vga, 118 "vga-lowmem", 0x20000); 119 memory_region_set_coalescing(&s->lowmem); 120 sysbus_init_mmio(sbd, &s->lowmem); 121 122 s->vga.bank_offset = 0; 123 s->vga.global_vmstate = true; 124 vga_common_init(&s->vga, OBJECT(dev)); 125 sysbus_init_mmio(sbd, &s->vga.vram); 126 s->vga.con = graphic_console_init(dev, 0, s->vga.hw_ops, &s->vga); 127 } 128 129 static Property vga_mmio_properties[] = { 130 DEFINE_PROP_UINT8("it_shift", VGAMmioState, it_shift, 0), 131 DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8), 132 DEFINE_PROP_END_OF_LIST(), 133 }; 134 135 static void vga_mmio_class_initfn(ObjectClass *klass, void *data) 136 { 137 DeviceClass *dc = DEVICE_CLASS(klass); 138 139 dc->realize = vga_mmio_realizefn; 140 dc->reset = vga_mmio_reset; 141 dc->vmsd = &vmstate_vga_common; 142 device_class_set_props(dc, vga_mmio_properties); 143 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); 144 } 145 146 static const TypeInfo vga_mmio_info = { 147 .name = TYPE_VGA_MMIO, 148 .parent = TYPE_SYS_BUS_DEVICE, 149 .instance_size = sizeof(VGAMmioState), 150 .class_init = vga_mmio_class_initfn, 151 }; 152 153 static void vga_mmio_register_types(void) 154 { 155 type_register_static(&vga_mmio_info); 156 } 157 158 type_init(vga_mmio_register_types) 159