summaryrefslogtreecommitdiffstats
path: root/hw/sysbus.c
blob: 9d8b1eaf7d8191d08267284f611fd4fafe5eb218 (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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/*
 *  System (CPU) Bus device support code
 *
 *  Copyright (c) 2009 CodeSourcery
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "sysbus.h"
#include "monitor.h"
#include "exec-memory.h"

static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static char *sysbus_get_fw_dev_path(DeviceState *dev);

static void system_bus_class_init(ObjectClass *klass, void *data)
{
    BusClass *k = BUS_CLASS(klass);

    k->print_dev = sysbus_dev_print;
    k->get_fw_dev_path = sysbus_get_fw_dev_path;
}

static const TypeInfo system_bus_info = {
    .name = TYPE_SYSTEM_BUS,
    .parent = TYPE_BUS,
    .instance_size = sizeof(BusState),
    .class_init = system_bus_class_init,
};

void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
{
    assert(n >= 0 && n < dev->num_irq);
    dev->irqs[n] = NULL;
    if (dev->irqp[n]) {
        *dev->irqp[n] = irq;
    }
}

void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
{
    assert(n >= 0 && n < dev->num_mmio);

    if (dev->mmio[n].addr == addr) {
        /* ??? region already mapped here.  */
        return;
    }
    if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
        /* Unregister previous mapping.  */
        memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
    }
    dev->mmio[n].addr = addr;
    memory_region_add_subregion(get_system_memory(),
                                addr,
                                dev->mmio[n].memory);
}


/* Request an IRQ source.  The actual IRQ object may be populated later.  */
void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
{
    int n;

    assert(dev->num_irq < QDEV_MAX_IRQ);
    n = dev->num_irq++;
    dev->irqp[n] = p;
}

/* Pass IRQs from a target device.  */
void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
{
    int i;
    assert(dev->num_irq == 0);
    dev->num_irq = target->num_irq;
    for (i = 0; i < dev->num_irq; i++) {
        dev->irqp[i] = target->irqp[i];
    }
}

void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
{
    int n;

    assert(dev->num_mmio < QDEV_MAX_MMIO);
    n = dev->num_mmio++;
    dev->mmio[n].addr = -1;
    dev->mmio[n].memory = memory;
}

MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
{
    return dev->mmio[n].memory;
}

void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
{
    pio_addr_t i;

    for (i = 0; i < size; i++) {
        assert(dev->num_pio < QDEV_MAX_PIO);
        dev->pio[dev->num_pio++] = ioport++;
    }
}

static int sysbus_device_init(DeviceState *dev)
{
    SysBusDevice *sd = SYS_BUS_DEVICE(dev);
    SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);

    return sbc->init(sd);
}

DeviceState *sysbus_create_varargs(const char *name,
                                   target_phys_addr_t addr, ...)
{
    DeviceState *dev;
    SysBusDevice *s;
    va_list va;
    qemu_irq irq;
    int n;

    dev = qdev_create(NULL, name);
    s = sysbus_from_qdev(dev);
    qdev_init_nofail(dev);
    if (addr != (target_phys_addr_t)-1) {
        sysbus_mmio_map(s, 0, addr);
    }
    va_start(va, addr);
    n = 0;
    while (1) {
        irq = va_arg(va, qemu_irq);
        if (!irq) {
            break;
        }
        sysbus_connect_irq(s, n, irq);
        n++;
    }
    va_end(va);
    return dev;
}

DeviceState *sysbus_try_create_varargs(const char *name,
                                       target_phys_addr_t addr, ...)
{
    DeviceState *dev;
    SysBusDevice *s;
    va_list va;
    qemu_irq irq;
    int n;

    dev = qdev_try_create(NULL, name);
    if (!dev) {
        return NULL;
    }
    s = sysbus_from_qdev(dev);
    qdev_init_nofail(dev);
    if (addr != (target_phys_addr_t)-1) {
        sysbus_mmio_map(s, 0, addr);
    }
    va_start(va, addr);
    n = 0;
    while (1) {
        irq = va_arg(va, qemu_irq);
        if (!irq) {
            break;
        }
        sysbus_connect_irq(s, n, irq);
        n++;
    }
    va_end(va);
    return dev;
}

static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
    SysBusDevice *s = sysbus_from_qdev(dev);
    target_phys_addr_t size;
    int i;

    monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
    for (i = 0; i < s->num_mmio; i++) {
        size = memory_region_size(s->mmio[i].memory);
        monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
                       indent, "", s->mmio[i].addr, size);
    }
}

static char *sysbus_get_fw_dev_path(DeviceState *dev)
{
    SysBusDevice *s = sysbus_from_qdev(dev);
    char path[40];
    int off;

    off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));

    if (s->num_mmio) {
        snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
                 s->mmio[0].addr);
    } else if (s->num_pio) {
        snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
    }

    return strdup(path);
}

void sysbus_add_memory(SysBusDevice *dev, target_phys_addr_t addr,
                       MemoryRegion *mem)
{
    memory_region_add_subregion(get_system_memory(), addr, mem);
}

void sysbus_add_memory_overlap(SysBusDevice *dev, target_phys_addr_t addr,
                               MemoryRegion *mem, unsigned priority)
{
    memory_region_add_subregion_overlap(get_system_memory(), addr, mem,
                                        priority);
}

void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem)
{
    memory_region_del_subregion(get_system_memory(), mem);
}

void sysbus_add_io(SysBusDevice *dev, target_phys_addr_t addr,
                       MemoryRegion *mem)
{
    memory_region_add_subregion(get_system_io(), addr, mem);
}

void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
{
    memory_region_del_subregion(get_system_io(), mem);
}

MemoryRegion *sysbus_address_space(SysBusDevice *dev)
{
    return get_system_memory();
}

static void sysbus_device_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *k = DEVICE_CLASS(klass);
    k->init = sysbus_device_init;
    k->bus_type = TYPE_SYSTEM_BUS;
}

static TypeInfo sysbus_device_type_info = {
    .name = TYPE_SYS_BUS_DEVICE,
    .parent = TYPE_DEVICE,
    .instance_size = sizeof(SysBusDevice),
    .abstract = true,
    .class_size = sizeof(SysBusDeviceClass),
    .class_init = sysbus_device_class_init,
};

/* This is a nasty hack to allow passing a NULL bus to qdev_create.  */
static BusState *main_system_bus;

static void main_system_bus_create(void)
{
    /* assign main_system_bus before qbus_create_inplace()
     * in order to make "if (bus != sysbus_get_default())" work */
    main_system_bus = g_malloc0(system_bus_info.instance_size);
    qbus_create_inplace(main_system_bus, TYPE_SYSTEM_BUS, NULL,
                        "main-system-bus");
    main_system_bus->glib_allocated = true;
    object_property_add_child(container_get(qdev_get_machine(),
                                            "/unattached"),
                              "sysbus", OBJECT(main_system_bus), NULL);
}

BusState *sysbus_get_default(void)
{
    if (!main_system_bus) {
        main_system_bus_create();
    }
    return main_system_bus;
}

static void sysbus_register_types(void)
{
    type_register_static(&system_bus_info);
    type_register_static(&sysbus_device_type_info);
}

type_init(sysbus_register_types)
OpenPOWER on IntegriCloud