1 /* 2 * QEMU IDE Emulation: mmio support (for embedded). 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * Copyright (c) 2006 Openedhand Ltd. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 #include "qemu/osdep.h" 26 #include "hw/hw.h" 27 #include "hw/sysbus.h" 28 #include "sysemu/dma.h" 29 30 #include "hw/ide/internal.h" 31 32 /***********************************************************/ 33 /* MMIO based ide port 34 * This emulates IDE device connected directly to the CPU bus without 35 * dedicated ide controller, which is often seen on embedded boards. 36 */ 37 38 #define TYPE_MMIO_IDE "mmio-ide" 39 #define MMIO_IDE(obj) OBJECT_CHECK(MMIOState, (obj), TYPE_MMIO_IDE) 40 41 typedef struct MMIOIDEState { 42 /*< private >*/ 43 SysBusDevice parent_obj; 44 /*< public >*/ 45 46 IDEBus bus; 47 48 uint32_t shift; 49 qemu_irq irq; 50 MemoryRegion iomem1, iomem2; 51 } MMIOState; 52 53 static void mmio_ide_reset(DeviceState *dev) 54 { 55 MMIOState *s = MMIO_IDE(dev); 56 57 ide_bus_reset(&s->bus); 58 } 59 60 static uint64_t mmio_ide_read(void *opaque, hwaddr addr, 61 unsigned size) 62 { 63 MMIOState *s = opaque; 64 addr >>= s->shift; 65 if (addr & 7) 66 return ide_ioport_read(&s->bus, addr); 67 else 68 return ide_data_readw(&s->bus, 0); 69 } 70 71 static void mmio_ide_write(void *opaque, hwaddr addr, 72 uint64_t val, unsigned size) 73 { 74 MMIOState *s = opaque; 75 addr >>= s->shift; 76 if (addr & 7) 77 ide_ioport_write(&s->bus, addr, val); 78 else 79 ide_data_writew(&s->bus, 0, val); 80 } 81 82 static const MemoryRegionOps mmio_ide_ops = { 83 .read = mmio_ide_read, 84 .write = mmio_ide_write, 85 .endianness = DEVICE_LITTLE_ENDIAN, 86 }; 87 88 static uint64_t mmio_ide_status_read(void *opaque, hwaddr addr, 89 unsigned size) 90 { 91 MMIOState *s= opaque; 92 return ide_status_read(&s->bus, 0); 93 } 94 95 static void mmio_ide_cmd_write(void *opaque, hwaddr addr, 96 uint64_t val, unsigned size) 97 { 98 MMIOState *s = opaque; 99 ide_cmd_write(&s->bus, 0, val); 100 } 101 102 static const MemoryRegionOps mmio_ide_cs_ops = { 103 .read = mmio_ide_status_read, 104 .write = mmio_ide_cmd_write, 105 .endianness = DEVICE_LITTLE_ENDIAN, 106 }; 107 108 static const VMStateDescription vmstate_ide_mmio = { 109 .name = "mmio-ide", 110 .version_id = 3, 111 .minimum_version_id = 0, 112 .fields = (VMStateField[]) { 113 VMSTATE_IDE_BUS(bus, MMIOState), 114 VMSTATE_IDE_DRIVES(bus.ifs, MMIOState), 115 VMSTATE_END_OF_LIST() 116 } 117 }; 118 119 static void mmio_ide_realizefn(DeviceState *dev, Error **errp) 120 { 121 SysBusDevice *d = SYS_BUS_DEVICE(dev); 122 MMIOState *s = MMIO_IDE(dev); 123 124 ide_init2(&s->bus, s->irq); 125 126 memory_region_init_io(&s->iomem1, OBJECT(s), &mmio_ide_ops, s, 127 "ide-mmio.1", 16 << s->shift); 128 memory_region_init_io(&s->iomem2, OBJECT(s), &mmio_ide_cs_ops, s, 129 "ide-mmio.2", 2 << s->shift); 130 sysbus_init_mmio(d, &s->iomem1); 131 sysbus_init_mmio(d, &s->iomem2); 132 } 133 134 static void mmio_ide_initfn(Object *obj) 135 { 136 SysBusDevice *d = SYS_BUS_DEVICE(obj); 137 MMIOState *s = MMIO_IDE(obj); 138 139 ide_bus_new(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2); 140 sysbus_init_irq(d, &s->irq); 141 } 142 143 static Property mmio_ide_properties[] = { 144 DEFINE_PROP_UINT32("shift", MMIOState, shift, 0), 145 DEFINE_PROP_END_OF_LIST() 146 }; 147 148 static void mmio_ide_class_init(ObjectClass *oc, void *data) 149 { 150 DeviceClass *dc = DEVICE_CLASS(oc); 151 152 dc->realize = mmio_ide_realizefn; 153 dc->reset = mmio_ide_reset; 154 dc->props = mmio_ide_properties; 155 dc->vmsd = &vmstate_ide_mmio; 156 } 157 158 static const TypeInfo mmio_ide_type_info = { 159 .name = TYPE_MMIO_IDE, 160 .parent = TYPE_SYS_BUS_DEVICE, 161 .instance_size = sizeof(MMIOState), 162 .instance_init = mmio_ide_initfn, 163 .class_init = mmio_ide_class_init, 164 }; 165 166 static void mmio_ide_register_types(void) 167 { 168 type_register_static(&mmio_ide_type_info); 169 } 170 171 void mmio_ide_init_drives(DeviceState *dev, DriveInfo *hd0, DriveInfo *hd1) 172 { 173 MMIOState *s = MMIO_IDE(dev); 174 175 if (hd0 != NULL) { 176 ide_create_drive(&s->bus, 0, hd0); 177 } 178 if (hd1 != NULL) { 179 ide_create_drive(&s->bus, 1, hd1); 180 } 181 } 182 183 type_init(mmio_ide_register_types) 184