summaryrefslogtreecommitdiff
blob: 4d489d205952ee2f8d151dfc4504e7e1abe66828 (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
/*
 * isa bus support for qdev.
 *
 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
 *
 * 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 "hw.h"
#include "sysemu.h"
#include "monitor.h"
#include "sysbus.h"
#include "isa.h"

struct ISABus {
    BusState qbus;
    qemu_irq *irqs;
    uint32_t assigned;
};
static ISABus *isabus;

static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);

static struct BusInfo isa_bus_info = {
    .name      = "ISA",
    .size      = sizeof(ISABus),
    .print_dev = isabus_dev_print,
};

ISABus *isa_bus_new(DeviceState *dev)
{
    if (isabus) {
        fprintf(stderr, "Can't create a second ISA bus\n");
        return NULL;
    }
    if (NULL == dev) {
        dev = qdev_create(NULL, "isabus-bridge");
        qdev_init_nofail(dev);
    }

    isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
    return isabus;
}

void isa_bus_irqs(qemu_irq *irqs)
{
    isabus->irqs = irqs;
}

/*
 * isa_reserve_irq() reserves the ISA irq and returns the corresponding
 * qemu_irq entry for the i8259.
 *
 * This function is only for special cases such as the 'ferr', and
 * temporary use for normal devices until they are converted to qdev.
 */
qemu_irq isa_reserve_irq(int isairq)
{
    if (isairq < 0 || isairq > 15) {
        fprintf(stderr, "isa irq %d invalid\n", isairq);
        exit(1);
    }
    if (isabus->assigned & (1 << isairq)) {
        fprintf(stderr, "isa irq %d already assigned\n", isairq);
        exit(1);
    }
    isabus->assigned |= (1 << isairq);
    return isabus->irqs[isairq];
}

void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
{
    assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
    if (isabus->assigned & (1 << isairq)) {
        fprintf(stderr, "isa irq %d already assigned\n", isairq);
        exit(1);
    }
    isabus->assigned |= (1 << isairq);
    dev->isairq[dev->nirqs] = isairq;
    *p = isabus->irqs[isairq];
    dev->nirqs++;
}

static int isa_qdev_init(DeviceState *qdev, DeviceInfo *base)
{
    ISADevice *dev = DO_UPCAST(ISADevice, qdev, qdev);
    ISADeviceInfo *info = DO_UPCAST(ISADeviceInfo, qdev, base);

    dev->isairq[0] = -1;
    dev->isairq[1] = -1;

    return info->init(dev);
}

void isa_qdev_register(ISADeviceInfo *info)
{
    info->qdev.init = isa_qdev_init;
    info->qdev.bus_info = &isa_bus_info;
    qdev_register(&info->qdev);
}

ISADevice *isa_create(const char *name)
{
    DeviceState *dev;

    if (!isabus) {
        hw_error("Tried to create isa device %s with no isa bus present.\n",
                 name);
    }
    dev = qdev_create(&isabus->qbus, name);
    return DO_UPCAST(ISADevice, qdev, dev);
}

ISADevice *isa_create_simple(const char *name)
{
    ISADevice *dev;

    dev = isa_create(name);
    qdev_init_nofail(&dev->qdev);
    return dev;
}

static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
    ISADevice *d = DO_UPCAST(ISADevice, qdev, dev);

    if (d->isairq[1] != -1) {
        monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
                       d->isairq[0], d->isairq[1]);
    } else if (d->isairq[0] != -1) {
        monitor_printf(mon, "%*sisa irq %d\n", indent, "",
                       d->isairq[0]);
    }
}

static int isabus_bridge_init(SysBusDevice *dev)
{
    /* nothing */
    return 0;
}

static SysBusDeviceInfo isabus_bridge_info = {
    .init = isabus_bridge_init,
    .qdev.name  = "isabus-bridge",
    .qdev.size  = sizeof(SysBusDevice),
    .qdev.no_user = 1,
};

static void isabus_register_devices(void)
{
    sysbus_register_withprop(&isabus_bridge_info);
}

device_init(isabus_register_devices)