trace: switch position of headers to what Meson requires
[qemu.git] / hw / misc / allwinner-sid.c
1 /*
2 * Allwinner Security ID emulation
3 *
4 * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com>
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu/units.h"
22 #include "hw/sysbus.h"
23 #include "migration/vmstate.h"
24 #include "qemu/log.h"
25 #include "qemu/module.h"
26 #include "qemu/guest-random.h"
27 #include "qapi/error.h"
28 #include "hw/qdev-properties.h"
29 #include "hw/misc/allwinner-sid.h"
30 #include "trace.h"
31
32 /* SID register offsets */
33 enum {
34 REG_PRCTL = 0x40, /* Control */
35 REG_RDKEY = 0x60, /* Read Key */
36 };
37
38 /* SID register flags */
39 enum {
40 REG_PRCTL_WRITE = 0x0002, /* Unknown write flag */
41 REG_PRCTL_OP_LOCK = 0xAC00, /* Lock operation */
42 };
43
44 static uint64_t allwinner_sid_read(void *opaque, hwaddr offset,
45 unsigned size)
46 {
47 const AwSidState *s = AW_SID(opaque);
48 uint64_t val = 0;
49
50 switch (offset) {
51 case REG_PRCTL: /* Control */
52 val = s->control;
53 break;
54 case REG_RDKEY: /* Read Key */
55 val = s->rdkey;
56 break;
57 default:
58 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
59 __func__, (uint32_t)offset);
60 return 0;
61 }
62
63 trace_allwinner_sid_read(offset, val, size);
64
65 return val;
66 }
67
68 static void allwinner_sid_write(void *opaque, hwaddr offset,
69 uint64_t val, unsigned size)
70 {
71 AwSidState *s = AW_SID(opaque);
72
73 trace_allwinner_sid_write(offset, val, size);
74
75 switch (offset) {
76 case REG_PRCTL: /* Control */
77 s->control = val;
78
79 if ((s->control & REG_PRCTL_OP_LOCK) &&
80 (s->control & REG_PRCTL_WRITE)) {
81 uint32_t id = s->control >> 16;
82
83 if (id <= sizeof(QemuUUID) - sizeof(s->rdkey)) {
84 s->rdkey = ldl_be_p(&s->identifier.data[id]);
85 }
86 }
87 s->control &= ~REG_PRCTL_WRITE;
88 break;
89 case REG_RDKEY: /* Read Key */
90 break;
91 default:
92 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
93 __func__, (uint32_t)offset);
94 break;
95 }
96 }
97
98 static const MemoryRegionOps allwinner_sid_ops = {
99 .read = allwinner_sid_read,
100 .write = allwinner_sid_write,
101 .endianness = DEVICE_NATIVE_ENDIAN,
102 .valid = {
103 .min_access_size = 4,
104 .max_access_size = 4,
105 },
106 .impl.min_access_size = 4,
107 };
108
109 static void allwinner_sid_reset(DeviceState *dev)
110 {
111 AwSidState *s = AW_SID(dev);
112
113 /* Set default values for registers */
114 s->control = 0;
115 s->rdkey = 0;
116 }
117
118 static void allwinner_sid_init(Object *obj)
119 {
120 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
121 AwSidState *s = AW_SID(obj);
122
123 /* Memory mapping */
124 memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sid_ops, s,
125 TYPE_AW_SID, 1 * KiB);
126 sysbus_init_mmio(sbd, &s->iomem);
127 }
128
129 static Property allwinner_sid_properties[] = {
130 DEFINE_PROP_UUID_NODEFAULT("identifier", AwSidState, identifier),
131 DEFINE_PROP_END_OF_LIST()
132 };
133
134 static const VMStateDescription allwinner_sid_vmstate = {
135 .name = "allwinner-sid",
136 .version_id = 1,
137 .minimum_version_id = 1,
138 .fields = (VMStateField[]) {
139 VMSTATE_UINT32(control, AwSidState),
140 VMSTATE_UINT32(rdkey, AwSidState),
141 VMSTATE_UINT8_ARRAY_V(identifier.data, AwSidState, sizeof(QemuUUID), 1),
142 VMSTATE_END_OF_LIST()
143 }
144 };
145
146 static void allwinner_sid_class_init(ObjectClass *klass, void *data)
147 {
148 DeviceClass *dc = DEVICE_CLASS(klass);
149
150 dc->reset = allwinner_sid_reset;
151 dc->vmsd = &allwinner_sid_vmstate;
152 device_class_set_props(dc, allwinner_sid_properties);
153 }
154
155 static const TypeInfo allwinner_sid_info = {
156 .name = TYPE_AW_SID,
157 .parent = TYPE_SYS_BUS_DEVICE,
158 .instance_init = allwinner_sid_init,
159 .instance_size = sizeof(AwSidState),
160 .class_init = allwinner_sid_class_init,
161 };
162
163 static void allwinner_sid_register(void)
164 {
165 type_register_static(&allwinner_sid_info);
166 }
167
168 type_init(allwinner_sid_register)