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/sysbus.h" 28 #include "hw/display/vga.h" 29 #include "hw/qdev-properties.h" 30 #include "vga_int.h" 31 32 /* 33 * QEMU interface: 34 * + sysbus MMIO region 0: VGA I/O registers 35 * + sysbus MMIO region 1: VGA MMIO registers 36 * + sysbus MMIO region 2: VGA memory 37 */ 38 39 OBJECT_DECLARE_SIMPLE_TYPE(VGAMmioState, VGA_MMIO) 40 41 struct VGAMmioState { 42 /*< private >*/ 43 SysBusDevice parent_obj; 44 45 /*< public >*/ 46 VGACommonState vga; 47 MemoryRegion iomem; 48 MemoryRegion lowmem; 49 50 uint8_t it_shift; 51 }; 52 53 static uint64_t vga_mm_read(void *opaque, hwaddr addr, unsigned size) 54 { 55 VGAMmioState *s = opaque; 56 57 return vga_ioport_read(&s->vga, addr >> s->it_shift) & 58 MAKE_64BIT_MASK(0, size * 8); 59 } 60 61 static void vga_mm_write(void *opaque, hwaddr addr, uint64_t value, 62 unsigned size) 63 { 64 VGAMmioState *s = opaque; 65 66 vga_ioport_write(&s->vga, addr >> s->it_shift, 67 value & MAKE_64BIT_MASK(0, size * 8)); 68 } 69 70 static const MemoryRegionOps vga_mm_ctrl_ops = { 71 .read = vga_mm_read, 72 .write = vga_mm_write, 73 .valid.min_access_size = 1, 74 .valid.max_access_size = 4, 75 .impl.min_access_size = 1, 76 .impl.max_access_size = 4, 77 .endianness = DEVICE_NATIVE_ENDIAN, 78 }; 79 80 static void vga_mmio_reset(DeviceState *dev) 81 { 82 VGAMmioState *s = VGA_MMIO(dev); 83 84 vga_common_reset(&s->vga); 85 } 86 87 static void vga_mmio_realizefn(DeviceState *dev, Error **errp) 88 { 89 VGAMmioState *s = VGA_MMIO(dev); 90 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 91 92 memory_region_init_io(&s->iomem, OBJECT(dev), &vga_mm_ctrl_ops, s, 93 "vga-mmio", 0x100000); 94 memory_region_set_flush_coalesced(&s->iomem); 95 sysbus_init_mmio(sbd, &s->iomem); 96 97 /* XXX: endianness? */ 98 memory_region_init_io(&s->lowmem, OBJECT(dev), &vga_mem_ops, &s->vga, 99 "vga-lowmem", 0x20000); 100 memory_region_set_coalescing(&s->lowmem); 101 sysbus_init_mmio(sbd, &s->lowmem); 102 103 s->vga.bank_offset = 0; 104 s->vga.global_vmstate = true; 105 vga_common_init(&s->vga, OBJECT(dev)); 106 sysbus_init_mmio(sbd, &s->vga.vram); 107 s->vga.con = graphic_console_init(dev, 0, s->vga.hw_ops, &s->vga); 108 } 109 110 static Property vga_mmio_properties[] = { 111 DEFINE_PROP_UINT8("it_shift", VGAMmioState, it_shift, 0), 112 DEFINE_PROP_UINT32("vgamem_mb", VGAMmioState, vga.vram_size_mb, 8), 113 DEFINE_PROP_END_OF_LIST(), 114 }; 115 116 static void vga_mmio_class_initfn(ObjectClass *klass, void *data) 117 { 118 DeviceClass *dc = DEVICE_CLASS(klass); 119 120 dc->realize = vga_mmio_realizefn; 121 dc->reset = vga_mmio_reset; 122 dc->vmsd = &vmstate_vga_common; 123 device_class_set_props(dc, vga_mmio_properties); 124 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); 125 } 126 127 static const TypeInfo vga_mmio_info = { 128 .name = TYPE_VGA_MMIO, 129 .parent = TYPE_SYS_BUS_DEVICE, 130 .instance_size = sizeof(VGAMmioState), 131 .class_init = vga_mmio_class_initfn, 132 }; 133 134 static void vga_mmio_register_types(void) 135 { 136 type_register_static(&vga_mmio_info); 137 } 138 139 type_init(vga_mmio_register_types) 140