hw/ide/mmio.c

   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
  26 #include "qemu/osdep.h"
  27 #include "hw/sysbus.h"
  28 #include "migration/vmstate.h"
  29 #include "qemu/module.h"
  30 #include "sysemu/dma.h"
  31
  32 #include "hw/ide/internal.h"
  33 #include "hw/qdev-properties.h"
  34 #include "qom/object.h"
  35
  36 /***********************************************************/
  37 /* MMIO based ide port
  38  * This emulates IDE device connected directly to the CPU bus without
  39  * dedicated ide controller, which is often seen on embedded boards.
  40  */
  41
  42 #define TYPE_MMIO_IDE "mmio-ide"
  43 typedef struct MMIOIDEState MMIOState;
  44 DECLARE_INSTANCE_CHECKER(MMIOState, MMIO_IDE,
  45                          TYPE_MMIO_IDE)
  46
  47 struct MMIOIDEState {
  48     /*< private >*/
  49     SysBusDevice parent_obj;
  50     /*< public >*/
  51
  52     IDEBus bus;
  53
  54     uint32_t shift;
  55     qemu_irq irq;
  56     MemoryRegion iomem1, iomem2;
  57 };
  58
  59 static void mmio_ide_reset(DeviceState *dev)
  60 {
  61     MMIOState *s = MMIO_IDE(dev);
  62
  63     ide_bus_reset(&s->bus);
  64 }
  65
  66 static uint64_t mmio_ide_read(void *opaque, hwaddr addr,
  67                               unsigned size)
  68 {
  69     MMIOState *s = opaque;
  70     addr >>= s->shift;
  71     if (addr & 7)
  72         return ide_ioport_read(&s->bus, addr);
  73     else
  74         return ide_data_readw(&s->bus, 0);
  75 }
  76
  77 static void mmio_ide_write(void *opaque, hwaddr addr,
  78                            uint64_t val, unsigned size)
  79 {
  80     MMIOState *s = opaque;
  81     addr >>= s->shift;
  82     if (addr & 7)
  83         ide_ioport_write(&s->bus, addr, val);
  84     else
  85         ide_data_writew(&s->bus, 0, val);
  86 }
  87
  88 static const MemoryRegionOps mmio_ide_ops = {
  89     .read = mmio_ide_read,
  90     .write = mmio_ide_write,
  91     .endianness = DEVICE_LITTLE_ENDIAN,
  92 };
  93
  94 static uint64_t mmio_ide_status_read(void *opaque, hwaddr addr,
  95                                      unsigned size)
  96 {
  97     MMIOState *s= opaque;
  98     return ide_status_read(&s->bus, 0);
  99 }
 100
 101 static void mmio_ide_ctrl_write(void *opaque, hwaddr addr,
 102                                 uint64_t val, unsigned size)
 103 {
 104     MMIOState *s = opaque;
 105     ide_ctrl_write(&s->bus, 0, val);
 106 }
 107
 108 static const MemoryRegionOps mmio_ide_cs_ops = {
 109     .read = mmio_ide_status_read,
 110     .write = mmio_ide_ctrl_write,
 111     .endianness = DEVICE_LITTLE_ENDIAN,
 112 };
 113
 114 static const VMStateDescription vmstate_ide_mmio = {
 115     .name = "mmio-ide",
 116     .version_id = 3,
 117     .minimum_version_id = 0,
 118     .fields = (VMStateField[]) {
 119         VMSTATE_IDE_BUS(bus, MMIOState),
 120         VMSTATE_IDE_DRIVES(bus.ifs, MMIOState),
 121         VMSTATE_END_OF_LIST()
 122     }
 123 };
 124
 125 static void mmio_ide_realizefn(DeviceState *dev, Error **errp)
 126 {
 127     SysBusDevice *d = SYS_BUS_DEVICE(dev);
 128     MMIOState *s = MMIO_IDE(dev);
 129
 130     ide_init2(&s->bus, s->irq);
 131
 132     memory_region_init_io(&s->iomem1, OBJECT(s), &mmio_ide_ops, s,
 133                           "ide-mmio.1", 16 << s->shift);
 134     memory_region_init_io(&s->iomem2, OBJECT(s), &mmio_ide_cs_ops, s,
 135                           "ide-mmio.2", 2 << s->shift);
 136     sysbus_init_mmio(d, &s->iomem1);
 137     sysbus_init_mmio(d, &s->iomem2);
 138 }
 139
 140 static void mmio_ide_initfn(Object *obj)
 141 {
 142     SysBusDevice *d = SYS_BUS_DEVICE(obj);
 143     MMIOState *s = MMIO_IDE(obj);
 144
 145     ide_bus_new(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2);
 146     sysbus_init_irq(d, &s->irq);
 147 }
 148
 149 static Property mmio_ide_properties[] = {
 150     DEFINE_PROP_UINT32("shift", MMIOState, shift, 0),
 151     DEFINE_PROP_END_OF_LIST()
 152 };
 153
 154 static void mmio_ide_class_init(ObjectClass *oc, void *data)
 155 {
 156     DeviceClass *dc = DEVICE_CLASS(oc);
 157
 158     dc->realize = mmio_ide_realizefn;
 159     dc->reset = mmio_ide_reset;
 160     device_class_set_props(dc, mmio_ide_properties);
 161     dc->vmsd = &vmstate_ide_mmio;
 162 }
 163
 164 static const TypeInfo mmio_ide_type_info = {
 165     .name = TYPE_MMIO_IDE,
 166     .parent = TYPE_SYS_BUS_DEVICE,
 167     .instance_size = sizeof(MMIOState),
 168     .instance_init = mmio_ide_initfn,
 169     .class_init = mmio_ide_class_init,
 170 };
 171
 172 static void mmio_ide_register_types(void)
 173 {
 174     type_register_static(&mmio_ide_type_info);
 175 }
 176
 177 void mmio_ide_init_drives(DeviceState *dev, DriveInfo *hd0, DriveInfo *hd1)
 178 {
 179     MMIOState *s = MMIO_IDE(dev);
 180
 181     if (hd0 != NULL) {
 182         ide_create_drive(&s->bus, 0, hd0);
 183     }
 184     if (hd1 != NULL) {
 185         ide_create_drive(&s->bus, 1, hd1);
 186     }
 187 }
 188
 189 type_init(mmio_ide_register_types)