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
|
/*
* ARM IoTKit system information block
*
* Copyright (c) 2018 Linaro Limited
* Written by Peter Maydell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 or
* (at your option) any later version.
*/
/*
* This is a model of the "system information block" which is part of the
* Arm IoTKit and documented in
* https://developer.arm.com/documentation/ecm0601256/latest
* It consists of 2 read-only version/config registers, plus the
* usual ID registers.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "trace.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "hw/registerfields.h"
#include "hw/misc/iotkit-sysinfo.h"
#include "hw/qdev-properties.h"
#include "hw/arm/armsse-version.h"
REG32(SYS_VERSION, 0x0)
REG32(SYS_CONFIG, 0x4)
REG32(SYS_CONFIG1, 0x8)
REG32(IIDR, 0xfc8)
REG32(PID4, 0xfd0)
REG32(PID5, 0xfd4)
REG32(PID6, 0xfd8)
REG32(PID7, 0xfdc)
REG32(PID0, 0xfe0)
REG32(PID1, 0xfe4)
REG32(PID2, 0xfe8)
REG32(PID3, 0xfec)
REG32(CID0, 0xff0)
REG32(CID1, 0xff4)
REG32(CID2, 0xff8)
REG32(CID3, 0xffc)
/* PID/CID values */
static const int sysinfo_id[] = {
0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
0x58, 0xb8, 0x0b, 0x00, /* PID0..PID3 */
0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
};
static const int sysinfo_sse300_id[] = {
0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
0x58, 0xb8, 0x1b, 0x00, /* PID0..PID3 */
0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
};
static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
unsigned size)
{
IoTKitSysInfo *s = IOTKIT_SYSINFO(opaque);
uint64_t r;
switch (offset) {
case A_SYS_VERSION:
r = s->sys_version;
break;
case A_SYS_CONFIG:
r = s->sys_config;
break;
case A_SYS_CONFIG1:
switch (s->sse_version) {
case ARMSSE_SSE300:
return 0;
break;
default:
goto bad_read;
}
break;
case A_IIDR:
switch (s->sse_version) {
case ARMSSE_SSE300:
return s->iidr;
break;
default:
goto bad_read;
}
break;
case A_PID4 ... A_CID3:
switch (s->sse_version) {
case ARMSSE_SSE300:
r = sysinfo_sse300_id[(offset - A_PID4) / 4];
break;
default:
r = sysinfo_id[(offset - A_PID4) / 4];
break;
}
break;
default:
bad_read:
qemu_log_mask(LOG_GUEST_ERROR,
"IoTKit SysInfo read: bad offset %x\n", (int)offset);
r = 0;
break;
}
trace_iotkit_sysinfo_read(offset, r, size);
return r;
}
static void iotkit_sysinfo_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
trace_iotkit_sysinfo_write(offset, value, size);
qemu_log_mask(LOG_GUEST_ERROR,
"IoTKit SysInfo: write to RO offset 0x%x\n", (int)offset);
}
static const MemoryRegionOps iotkit_sysinfo_ops = {
.read = iotkit_sysinfo_read,
.write = iotkit_sysinfo_write,
.endianness = DEVICE_LITTLE_ENDIAN,
/* byte/halfword accesses are just zero-padded on reads and writes */
.impl.min_access_size = 4,
.impl.max_access_size = 4,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
};
static Property iotkit_sysinfo_props[] = {
DEFINE_PROP_UINT32("SYS_VERSION", IoTKitSysInfo, sys_version, 0),
DEFINE_PROP_UINT32("SYS_CONFIG", IoTKitSysInfo, sys_config, 0),
DEFINE_PROP_UINT32("sse-version", IoTKitSysInfo, sse_version, 0),
DEFINE_PROP_UINT32("IIDR", IoTKitSysInfo, iidr, 0),
DEFINE_PROP_END_OF_LIST()
};
static void iotkit_sysinfo_init(Object *obj)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
IoTKitSysInfo *s = IOTKIT_SYSINFO(obj);
memory_region_init_io(&s->iomem, obj, &iotkit_sysinfo_ops,
s, "iotkit-sysinfo", 0x1000);
sysbus_init_mmio(sbd, &s->iomem);
}
static void iotkit_sysinfo_realize(DeviceState *dev, Error **errp)
{
IoTKitSysInfo *s = IOTKIT_SYSINFO(dev);
if (!armsse_version_valid(s->sse_version)) {
error_setg(errp, "invalid sse-version value %d", s->sse_version);
return;
}
}
static void iotkit_sysinfo_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
/*
* This device has no guest-modifiable state and so it
* does not need a reset function or VMState.
*/
dc->realize = iotkit_sysinfo_realize;
device_class_set_props(dc, iotkit_sysinfo_props);
}
static const TypeInfo iotkit_sysinfo_info = {
.name = TYPE_IOTKIT_SYSINFO,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(IoTKitSysInfo),
.instance_init = iotkit_sysinfo_init,
.class_init = iotkit_sysinfo_class_init,
};
static void iotkit_sysinfo_register_types(void)
{
type_register_static(&iotkit_sysinfo_info);
}
type_init(iotkit_sysinfo_register_types);
|
