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
|
/*
* ARM Platform Bus device tree generation helpers
*
* Copyright (c) 2014 Linaro Limited
*
* Authors:
* Alex Graf <agraf@suse.de>
* Eric Auger <eric.auger@linaro.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "hw/arm/sysbus-fdt.h"
#include "qemu/error-report.h"
#include "sysemu/device_tree.h"
#include "hw/platform-bus.h"
#include "sysemu/sysemu.h"
/*
* internal struct that contains the information to create dynamic
* sysbus device node
*/
typedef struct PlatformBusFDTData {
void *fdt; /* device tree handle */
int irq_start; /* index of the first IRQ usable by platform bus devices */
const char *pbus_node_name; /* name of the platform bus node */
PlatformBusDevice *pbus;
} PlatformBusFDTData;
/*
* struct used when calling the machine init done notifier
* that constructs the fdt nodes of platform bus devices
*/
typedef struct PlatformBusFDTNotifierParams {
Notifier notifier;
ARMPlatformBusFDTParams *fdt_params;
} PlatformBusFDTNotifierParams;
/* struct that associates a device type name and a node creation function */
typedef struct NodeCreationPair {
const char *typename;
int (*add_fdt_node_fn)(SysBusDevice *sbdev, void *opaque);
} NodeCreationPair;
/* list of supported dynamic sysbus devices */
static const NodeCreationPair add_fdt_node_functions[] = {
{"", NULL}, /* last element */
};
/**
* add_fdt_node - add the device tree node of a dynamic sysbus device
*
* @sbdev: handle to the sysbus device
* @opaque: handle to the PlatformBusFDTData
*
* Checks the sysbus type belongs to the list of device types that
* are dynamically instantiable and if so call the node creation
* function.
*/
static int add_fdt_node(SysBusDevice *sbdev, void *opaque)
{
int i, ret;
for (i = 0; i < ARRAY_SIZE(add_fdt_node_functions); i++) {
if (!strcmp(object_get_typename(OBJECT(sbdev)),
add_fdt_node_functions[i].typename)) {
ret = add_fdt_node_functions[i].add_fdt_node_fn(sbdev, opaque);
assert(!ret);
return 0;
}
}
error_report("Device %s can not be dynamically instantiated",
qdev_fw_name(DEVICE(sbdev)));
exit(1);
}
/**
* add_all_platform_bus_fdt_nodes - create all the platform bus nodes
*
* builds the parent platform bus node and all the nodes of dynamic
* sysbus devices attached to it.
*/
static void add_all_platform_bus_fdt_nodes(ARMPlatformBusFDTParams *fdt_params)
{
const char platcomp[] = "qemu,platform\0simple-bus";
PlatformBusDevice *pbus;
DeviceState *dev;
gchar *node;
uint64_t addr, size;
int irq_start, dtb_size;
struct arm_boot_info *info = fdt_params->binfo;
const ARMPlatformBusSystemParams *params = fdt_params->system_params;
const char *intc = fdt_params->intc;
void *fdt = info->get_dtb(info, &dtb_size);
/*
* If the user provided a dtb, we assume the dynamic sysbus nodes
* already are integrated there. This corresponds to a use case where
* the dynamic sysbus nodes are complex and their generation is not yet
* supported. In that case the user can take charge of the guest dt
* while qemu takes charge of the qom stuff.
*/
if (info->dtb_filename) {
return;
}
assert(fdt);
node = g_strdup_printf("/platform@%"PRIx64, params->platform_bus_base);
addr = params->platform_bus_base;
size = params->platform_bus_size;
irq_start = params->platform_bus_first_irq;
/* Create a /platform node that we can put all devices into */
qemu_fdt_add_subnode(fdt, node);
qemu_fdt_setprop(fdt, node, "compatible", platcomp, sizeof(platcomp));
/* Our platform bus region is less than 32bits, so 1 cell is enough for
* address and size
*/
qemu_fdt_setprop_cells(fdt, node, "#size-cells", 1);
qemu_fdt_setprop_cells(fdt, node, "#address-cells", 1);
qemu_fdt_setprop_cells(fdt, node, "ranges", 0, addr >> 32, addr, size);
qemu_fdt_setprop_phandle(fdt, node, "interrupt-parent", intc);
dev = qdev_find_recursive(sysbus_get_default(), TYPE_PLATFORM_BUS_DEVICE);
pbus = PLATFORM_BUS_DEVICE(dev);
/* We can only create dt nodes for dynamic devices when they're ready */
assert(pbus->done_gathering);
PlatformBusFDTData data = {
.fdt = fdt,
.irq_start = irq_start,
.pbus_node_name = node,
.pbus = pbus,
};
/* Loop through all dynamic sysbus devices and create their node */
foreach_dynamic_sysbus_device(add_fdt_node, &data);
g_free(node);
}
static void platform_bus_fdt_notify(Notifier *notifier, void *data)
{
PlatformBusFDTNotifierParams *p = DO_UPCAST(PlatformBusFDTNotifierParams,
notifier, notifier);
add_all_platform_bus_fdt_nodes(p->fdt_params);
g_free(p->fdt_params);
g_free(p);
}
void arm_register_platform_bus_fdt_creator(ARMPlatformBusFDTParams *fdt_params)
{
PlatformBusFDTNotifierParams *p = g_new(PlatformBusFDTNotifierParams, 1);
p->fdt_params = fdt_params;
p->notifier.notify = platform_bus_fdt_notify;
qemu_add_machine_init_done_notifier(&p->notifier);
}
|
