]>
Commit | Line | Data |
---|---|---|
c667a25b PM |
1 | /* |
2 | * ARM IoTKit system information block | |
3 | * | |
4 | * Copyright (c) 2018 Linaro Limited | |
5 | * Written by Peter Maydell | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | /* | |
13 | * This is a model of the "system information block" which is part of the | |
14 | * Arm IoTKit and documented in | |
50b52b18 | 15 | * https://developer.arm.com/documentation/ecm0601256/latest |
c667a25b PM |
16 | * It consists of 2 read-only version/config registers, plus the |
17 | * usual ID registers. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
21 | #include "qemu/log.h" | |
0b8fa32f | 22 | #include "qemu/module.h" |
c667a25b PM |
23 | #include "trace.h" |
24 | #include "qapi/error.h" | |
c667a25b PM |
25 | #include "hw/sysbus.h" |
26 | #include "hw/registerfields.h" | |
27 | #include "hw/misc/iotkit-sysinfo.h" | |
a27bd6c7 | 28 | #include "hw/qdev-properties.h" |
40766453 | 29 | #include "hw/arm/armsse-version.h" |
c667a25b PM |
30 | |
31 | REG32(SYS_VERSION, 0x0) | |
32 | REG32(SYS_CONFIG, 0x4) | |
446587a9 PM |
33 | REG32(SYS_CONFIG1, 0x8) |
34 | REG32(IIDR, 0xfc8) | |
c667a25b PM |
35 | REG32(PID4, 0xfd0) |
36 | REG32(PID5, 0xfd4) | |
37 | REG32(PID6, 0xfd8) | |
38 | REG32(PID7, 0xfdc) | |
39 | REG32(PID0, 0xfe0) | |
40 | REG32(PID1, 0xfe4) | |
41 | REG32(PID2, 0xfe8) | |
42 | REG32(PID3, 0xfec) | |
43 | REG32(CID0, 0xff0) | |
44 | REG32(CID1, 0xff4) | |
45 | REG32(CID2, 0xff8) | |
46 | REG32(CID3, 0xffc) | |
47 | ||
48 | /* PID/CID values */ | |
49 | static const int sysinfo_id[] = { | |
50 | 0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */ | |
51 | 0x58, 0xb8, 0x0b, 0x00, /* PID0..PID3 */ | |
52 | 0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */ | |
53 | }; | |
54 | ||
40766453 PM |
55 | static const int sysinfo_sse300_id[] = { |
56 | 0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */ | |
57 | 0x58, 0xb8, 0x1b, 0x00, /* PID0..PID3 */ | |
58 | 0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */ | |
59 | }; | |
60 | ||
c667a25b PM |
61 | static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset, |
62 | unsigned size) | |
63 | { | |
dde0c491 | 64 | IoTKitSysInfo *s = IOTKIT_SYSINFO(opaque); |
c667a25b PM |
65 | uint64_t r; |
66 | ||
67 | switch (offset) { | |
68 | case A_SYS_VERSION: | |
dde0c491 | 69 | r = s->sys_version; |
c667a25b PM |
70 | break; |
71 | ||
72 | case A_SYS_CONFIG: | |
dde0c491 | 73 | r = s->sys_config; |
c667a25b | 74 | break; |
446587a9 PM |
75 | case A_SYS_CONFIG1: |
76 | switch (s->sse_version) { | |
77 | case ARMSSE_SSE300: | |
78 | return 0; | |
79 | break; | |
80 | default: | |
81 | goto bad_read; | |
82 | } | |
83 | break; | |
84 | case A_IIDR: | |
85 | switch (s->sse_version) { | |
86 | case ARMSSE_SSE300: | |
87 | return s->iidr; | |
88 | break; | |
89 | default: | |
90 | goto bad_read; | |
91 | } | |
92 | break; | |
c667a25b | 93 | case A_PID4 ... A_CID3: |
40766453 PM |
94 | switch (s->sse_version) { |
95 | case ARMSSE_SSE300: | |
96 | r = sysinfo_sse300_id[(offset - A_PID4) / 4]; | |
97 | break; | |
98 | default: | |
99 | r = sysinfo_id[(offset - A_PID4) / 4]; | |
100 | break; | |
101 | } | |
c667a25b PM |
102 | break; |
103 | default: | |
446587a9 | 104 | bad_read: |
c667a25b PM |
105 | qemu_log_mask(LOG_GUEST_ERROR, |
106 | "IoTKit SysInfo read: bad offset %x\n", (int)offset); | |
107 | r = 0; | |
108 | break; | |
109 | } | |
110 | trace_iotkit_sysinfo_read(offset, r, size); | |
111 | return r; | |
112 | } | |
113 | ||
114 | static void iotkit_sysinfo_write(void *opaque, hwaddr offset, | |
115 | uint64_t value, unsigned size) | |
116 | { | |
117 | trace_iotkit_sysinfo_write(offset, value, size); | |
118 | ||
119 | qemu_log_mask(LOG_GUEST_ERROR, | |
120 | "IoTKit SysInfo: write to RO offset 0x%x\n", (int)offset); | |
121 | } | |
122 | ||
123 | static const MemoryRegionOps iotkit_sysinfo_ops = { | |
124 | .read = iotkit_sysinfo_read, | |
125 | .write = iotkit_sysinfo_write, | |
126 | .endianness = DEVICE_LITTLE_ENDIAN, | |
127 | /* byte/halfword accesses are just zero-padded on reads and writes */ | |
128 | .impl.min_access_size = 4, | |
129 | .impl.max_access_size = 4, | |
130 | .valid.min_access_size = 1, | |
131 | .valid.max_access_size = 4, | |
132 | }; | |
133 | ||
dde0c491 PM |
134 | static Property iotkit_sysinfo_props[] = { |
135 | DEFINE_PROP_UINT32("SYS_VERSION", IoTKitSysInfo, sys_version, 0), | |
136 | DEFINE_PROP_UINT32("SYS_CONFIG", IoTKitSysInfo, sys_config, 0), | |
40766453 | 137 | DEFINE_PROP_UINT32("sse-version", IoTKitSysInfo, sse_version, 0), |
446587a9 | 138 | DEFINE_PROP_UINT32("IIDR", IoTKitSysInfo, iidr, 0), |
dde0c491 PM |
139 | DEFINE_PROP_END_OF_LIST() |
140 | }; | |
141 | ||
c667a25b PM |
142 | static void iotkit_sysinfo_init(Object *obj) |
143 | { | |
144 | SysBusDevice *sbd = SYS_BUS_DEVICE(obj); | |
145 | IoTKitSysInfo *s = IOTKIT_SYSINFO(obj); | |
146 | ||
147 | memory_region_init_io(&s->iomem, obj, &iotkit_sysinfo_ops, | |
148 | s, "iotkit-sysinfo", 0x1000); | |
149 | sysbus_init_mmio(sbd, &s->iomem); | |
150 | } | |
151 | ||
40766453 PM |
152 | static void iotkit_sysinfo_realize(DeviceState *dev, Error **errp) |
153 | { | |
154 | IoTKitSysInfo *s = IOTKIT_SYSINFO(dev); | |
155 | ||
156 | if (!armsse_version_valid(s->sse_version)) { | |
157 | error_setg(errp, "invalid sse-version value %d", s->sse_version); | |
158 | return; | |
159 | } | |
160 | } | |
161 | ||
c667a25b PM |
162 | static void iotkit_sysinfo_class_init(ObjectClass *klass, void *data) |
163 | { | |
dde0c491 PM |
164 | DeviceClass *dc = DEVICE_CLASS(klass); |
165 | ||
c667a25b PM |
166 | /* |
167 | * This device has no guest-modifiable state and so it | |
168 | * does not need a reset function or VMState. | |
169 | */ | |
40766453 | 170 | dc->realize = iotkit_sysinfo_realize; |
4f67d30b | 171 | device_class_set_props(dc, iotkit_sysinfo_props); |
c667a25b PM |
172 | } |
173 | ||
174 | static const TypeInfo iotkit_sysinfo_info = { | |
175 | .name = TYPE_IOTKIT_SYSINFO, | |
176 | .parent = TYPE_SYS_BUS_DEVICE, | |
177 | .instance_size = sizeof(IoTKitSysInfo), | |
178 | .instance_init = iotkit_sysinfo_init, | |
179 | .class_init = iotkit_sysinfo_class_init, | |
180 | }; | |
181 | ||
182 | static void iotkit_sysinfo_register_types(void) | |
183 | { | |
184 | type_register_static(&iotkit_sysinfo_info); | |
185 | } | |
186 | ||
187 | type_init(iotkit_sysinfo_register_types); |