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 #include "hw/hw.h"
  26 #include "hw/sysbus.h"
  27 #include "sysemu/block-backend.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)