summaryrefslogtreecommitdiffstats
path: root/qemu/hw/ide/mmio.c
blob: b6ce62ac5aa6eaf0bb33bcd2d74d8b76b629d64e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/*
 * QEMU IDE Emulation: mmio support (for embedded).
 *
 * Copyright (c) 2003 Fabrice Bellard
 * Copyright (c) 2006 Openedhand Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "hw/hw.h"
#include "hw/sysbus.h"
#include "sysemu/block-backend.h"
#include "sysemu/dma.h"

#include <hw/ide/internal.h>

/***********************************************************/
/* MMIO based ide port
 * This emulates IDE device connected directly to the CPU bus without
 * dedicated ide controller, which is often seen on embedded boards.
 */

#define TYPE_MMIO_IDE "mmio-ide"
#define MMIO_IDE(obj) OBJECT_CHECK(MMIOState, (obj), TYPE_MMIO_IDE)

typedef struct MMIOIDEState {
    /*< private >*/
    SysBusDevice parent_obj;
    /*< public >*/

    IDEBus bus;

    uint32_t shift;
    qemu_irq irq;
    MemoryRegion iomem1, iomem2;
} MMIOState;

static void mmio_ide_reset(DeviceState *dev)
{
    MMIOState *s = MMIO_IDE(dev);

    ide_bus_reset(&s->bus);
}

static uint64_t mmio_ide_read(void *opaque, hwaddr addr,
                              unsigned size)
{
    MMIOState *s = opaque;
    addr >>= s->shift;
    if (addr & 7)
        return ide_ioport_read(&s->bus, addr);
    else
        return ide_data_readw(&s->bus, 0);
}

static void mmio_ide_write(void *opaque, hwaddr addr,
                           uint64_t val, unsigned size)
{
    MMIOState *s = opaque;
    addr >>= s->shift;
    if (addr & 7)
        ide_ioport_write(&s->bus, addr, val);
    else
        ide_data_writew(&s->bus, 0, val);
}

static const MemoryRegionOps mmio_ide_ops = {
    .read = mmio_ide_read,
    .write = mmio_ide_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
};

static uint64_t mmio_ide_status_read(void *opaque, hwaddr addr,
                                     unsigned size)
{
    MMIOState *s= opaque;
    return ide_status_read(&s->bus, 0);
}

static void mmio_ide_cmd_write(void *opaque, hwaddr addr,
                               uint64_t val, unsigned size)
{
    MMIOState *s = opaque;
    ide_cmd_write(&s->bus, 0, val);
}

static const MemoryRegionOps mmio_ide_cs_ops = {
    .read = mmio_ide_status_read,
    .write = mmio_ide_cmd_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
};

static const VMStateDescription vmstate_ide_mmio = {
    .name = "mmio-ide",
    .version_id = 3,
    .minimum_version_id = 0,
    .fields = (VMStateField[]) {
        VMSTATE_IDE_BUS(bus, MMIOState),
        VMSTATE_IDE_DRIVES(bus.ifs, MMIOState),
        VMSTATE_END_OF_LIST()
    }
};

static void mmio_ide_realizefn(DeviceState *dev, Error **errp)
{
    SysBusDevice *d = SYS_BUS_DEVICE(dev);
    MMIOState *s = MMIO_IDE(dev);

    ide_init2(&s->bus, s->irq);

    memory_region_init_io(&s->iomem1, OBJECT(s), &mmio_ide_ops, s,
                          "ide-mmio.1", 16 << s->shift);
    memory_region_init_io(&s->iomem2, OBJECT(s), &mmio_ide_cs_ops, s,
                          "ide-mmio.2", 2 << s->shift);
    sysbus_init_mmio(d, &s->iomem1);
    sysbus_init_mmio(d, &s->iomem2);
}

static void mmio_ide_initfn(Object *obj)
{
    SysBusDevice *d = SYS_BUS_DEVICE(obj);
    MMIOState *s = MMIO_IDE(obj);

    ide_bus_new(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2);
    sysbus_init_irq(d, &s->irq);
}

static Property mmio_ide_properties[] = {
    DEFINE_PROP_UINT32("shift", MMIOState, shift, 0),
    DEFINE_PROP_END_OF_LIST()
};

static void mmio_ide_class_init(ObjectClass *oc, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(oc);

    dc->realize = mmio_ide_realizefn;
    dc->reset = mmio_ide_reset;
    dc->props = mmio_ide_properties;
    dc->vmsd = &vmstate_ide_mmio;
}

static const TypeInfo mmio_ide_type_info = {
    .name = TYPE_MMIO_IDE,
    .parent = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(MMIOState),
    .instance_init = mmio_ide_initfn,
    .class_init = mmio_ide_class_init,
};

static void mmio_ide_register_types(void)
{
    type_register_static(&mmio_ide_type_info);
}

void mmio_ide_init_drives(DeviceState *dev, DriveInfo *hd0, DriveInfo *hd1)
{
    MMIOState *s = MMIO_IDE(dev);

    if (hd0 != NULL) {
        ide_create_drive(&s->bus, 0, hd0);
    }
    if (hd1 != NULL) {
        ide_create_drive(&s->bus, 1, hd1);
    }
}

type_init(mmio_ide_register_types)