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
|
/*
* Device's clock input and output
*
* Copyright GreenSocs 2016-2020
*
* Authors:
* Frederic Konrad
* Damien Hedde
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "hw/qdev-clock.h"
#include "hw/qdev-core.h"
#include "qapi/error.h"
/*
* qdev_init_clocklist:
* Add a new clock in a device
*/
static NamedClockList *qdev_init_clocklist(DeviceState *dev, const char *name,
bool alias, bool output, Clock *clk)
{
NamedClockList *ncl;
/*
* Clock must be added before realize() so that we can compute the
* clock's canonical path during device_realize().
*/
assert(!dev->realized);
/*
* The ncl structure is freed by qdev_finalize_clocklist() which will
* be called during @dev's device_finalize().
*/
ncl = g_new0(NamedClockList, 1);
ncl->name = g_strdup(name);
ncl->alias = alias;
ncl->output = output;
ncl->clock = clk;
QLIST_INSERT_HEAD(&dev->clocks, ncl, node);
return ncl;
}
void qdev_finalize_clocklist(DeviceState *dev)
{
/* called by @dev's device_finalize() */
NamedClockList *ncl, *ncl_next;
QLIST_FOREACH_SAFE(ncl, &dev->clocks, node, ncl_next) {
QLIST_REMOVE(ncl, node);
if (!ncl->alias) {
/*
* We kept a reference on the input clock to ensure it lives up to
* this point; it is used by the monitor to show the frequency.
*/
object_unref(OBJECT(ncl->clock));
}
g_free(ncl->name);
g_free(ncl);
}
}
Clock *qdev_init_clock_out(DeviceState *dev, const char *name)
{
Clock *clk = CLOCK(object_new(TYPE_CLOCK));
object_property_add_child(OBJECT(dev), name, OBJECT(clk));
qdev_init_clocklist(dev, name, false, true, clk);
return clk;
}
Clock *qdev_init_clock_in(DeviceState *dev, const char *name,
ClockCallback *callback, void *opaque,
unsigned int events)
{
Clock *clk = CLOCK(object_new(TYPE_CLOCK));
object_property_add_child(OBJECT(dev), name, OBJECT(clk));
qdev_init_clocklist(dev, name, false, false, clk);
if (callback) {
clock_set_callback(clk, callback, opaque, events);
}
return clk;
}
void qdev_init_clocks(DeviceState *dev, const ClockPortInitArray clocks)
{
const struct ClockPortInitElem *elem;
for (elem = &clocks[0]; elem->name != NULL; elem++) {
Clock **clkp;
/* offset cannot be inside the DeviceState part */
assert(elem->offset > sizeof(DeviceState));
clkp = ((void *)dev) + elem->offset;
if (elem->is_output) {
*clkp = qdev_init_clock_out(dev, elem->name);
} else {
*clkp = qdev_init_clock_in(dev, elem->name, elem->callback, dev,
elem->callback_events);
}
}
}
static NamedClockList *qdev_get_clocklist(DeviceState *dev, const char *name)
{
NamedClockList *ncl;
QLIST_FOREACH(ncl, &dev->clocks, node) {
if (strcmp(name, ncl->name) == 0) {
return ncl;
}
}
return NULL;
}
Clock *qdev_get_clock_in(DeviceState *dev, const char *name)
{
NamedClockList *ncl;
assert(name);
ncl = qdev_get_clocklist(dev, name);
if (!ncl) {
error_report("Can not find clock-in '%s' for device type '%s'",
name, object_get_typename(OBJECT(dev)));
abort();
}
assert(!ncl->output);
return ncl->clock;
}
Clock *qdev_get_clock_out(DeviceState *dev, const char *name)
{
NamedClockList *ncl;
assert(name);
ncl = qdev_get_clocklist(dev, name);
if (!ncl) {
error_report("Can not find clock-out '%s' for device type '%s'",
name, object_get_typename(OBJECT(dev)));
abort();
}
assert(ncl->output);
return ncl->clock;
}
Clock *qdev_alias_clock(DeviceState *dev, const char *name,
DeviceState *alias_dev, const char *alias_name)
{
NamedClockList *ncl = qdev_get_clocklist(dev, name);
Clock *clk = ncl->clock;
ncl = qdev_init_clocklist(alias_dev, alias_name, true, ncl->output, clk);
object_property_add_link(OBJECT(alias_dev), alias_name,
TYPE_CLOCK,
(Object **) &ncl->clock,
NULL, OBJ_PROP_LINK_STRONG);
/*
* Since the link property has the OBJ_PROP_LINK_STRONG flag, the clk
* object reference count gets decremented on property deletion.
* However object_property_add_link does not increment it since it
* doesn't know the linked object. Increment it here to ensure the
* aliased clock stays alive during this device life-time.
*/
object_ref(OBJECT(clk));
return clk;
}
void qdev_connect_clock_in(DeviceState *dev, const char *name, Clock *source)
{
assert(!dev->realized);
clock_set_source(qdev_get_clock_in(dev, name), source);
}
|
