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