LXR qemu/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 "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
  41typedef 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
  53static void mmio_ide_reset(DeviceState *dev)
  54{
  55    MMIOState *s = MMIO_IDE(dev);
  56
  57    ide_bus_reset(&s->bus);
  58}
  59
  60static 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
  71static 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
  82static const MemoryRegionOps mmio_ide_ops = {
  83    .read = mmio_ide_read,
  84    .write = mmio_ide_write,
  85    .endianness = DEVICE_LITTLE_ENDIAN,
  86};
  87
  88static 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
  95static 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
 102static 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
 108static 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
 119static 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
 134static 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
 143static Property mmio_ide_properties[] = {
 144    DEFINE_PROP_UINT32("shift", MMIOState, shift, 0),
 145    DEFINE_PROP_END_OF_LIST()
 146};
 147
 148static 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
 158static 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
 166static void mmio_ide_register_types(void)
 167{
 168    type_register_static(&mmio_ide_type_info);
 169}
 170
 171void 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
 183type_init(mmio_ide_register_types)
 184