pcie_aer: support configurable AER capa version
[qemu.git] / hw / core / generic-loader.c
1 /*
2 * Generic Loader
3 *
4 * Copyright (C) 2014 Li Guang
5 * Copyright (C) 2016 Xilinx Inc.
6 * Written by Li Guang <lig.fnst@cn.fujitsu.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * for more details.
17 *
18 */
19
20 /*
21 * Internally inside QEMU this is a device. It is a strange device that
22 * provides no hardware interface but allows QEMU to monkey patch memory
23 * specified when it is created. To be able to do this it has a reset
24 * callback that does the memory operations.
25
26 * This device allows the user to monkey patch memory. To be able to do
27 * this it needs a backend to manage the datas, the same as other
28 * memory-related devices. In this case as the backend is so trivial we
29 * have merged it with the frontend instead of creating and maintaining a
30 * seperate backend.
31 */
32
33 #include "qemu/osdep.h"
34 #include "qom/cpu.h"
35 #include "hw/sysbus.h"
36 #include "sysemu/dma.h"
37 #include "hw/loader.h"
38 #include "qapi/error.h"
39 #include "hw/core/generic-loader.h"
40
41 #define CPU_NONE 0xFFFFFFFF
42
43 static void generic_loader_reset(void *opaque)
44 {
45 GenericLoaderState *s = GENERIC_LOADER(opaque);
46
47 if (s->set_pc) {
48 CPUClass *cc = CPU_GET_CLASS(s->cpu);
49 cpu_reset(s->cpu);
50 if (cc) {
51 cc->set_pc(s->cpu, s->addr);
52 }
53 }
54
55 if (s->data_len) {
56 assert(s->data_len < sizeof(s->data));
57 dma_memory_write(s->cpu->as, s->addr, &s->data, s->data_len);
58 }
59 }
60
61 static void generic_loader_realize(DeviceState *dev, Error **errp)
62 {
63 GenericLoaderState *s = GENERIC_LOADER(dev);
64 hwaddr entry;
65 int big_endian;
66 int size = 0;
67
68 s->set_pc = false;
69
70 /* Perform some error checking on the user's options */
71 if (s->data || s->data_len || s->data_be) {
72 /* User is loading memory values */
73 if (s->file) {
74 error_setg(errp, "Specifying a file is not supported when loading "
75 "memory values");
76 return;
77 } else if (s->force_raw) {
78 error_setg(errp, "Specifying force-raw is not supported when "
79 "loading memory values");
80 return;
81 } else if (!s->data_len) {
82 /* We cant' check for !data here as a value of 0 is still valid. */
83 error_setg(errp, "Both data and data-len must be specified");
84 return;
85 } else if (s->data_len > 8) {
86 error_setg(errp, "data-len cannot be greater then 8 bytes");
87 return;
88 }
89 } else if (s->file || s->force_raw) {
90 /* User is loading an image */
91 if (s->data || s->data_len || s->data_be) {
92 error_setg(errp, "data can not be specified when loading an "
93 "image");
94 return;
95 }
96 /* The user specified a file, only set the PC if they also specified
97 * a CPU to use.
98 */
99 if (s->cpu_num != CPU_NONE) {
100 s->set_pc = true;
101 }
102 } else if (s->addr) {
103 /* User is setting the PC */
104 if (s->data || s->data_len || s->data_be) {
105 error_setg(errp, "data can not be specified when setting a "
106 "program counter");
107 return;
108 } else if (!s->cpu_num) {
109 error_setg(errp, "cpu_num must be specified when setting a "
110 "program counter");
111 return;
112 }
113 s->set_pc = true;
114 } else {
115 /* Did the user specify anything? */
116 error_setg(errp, "please include valid arguments");
117 return;
118 }
119
120 qemu_register_reset(generic_loader_reset, dev);
121
122 if (s->cpu_num != CPU_NONE) {
123 s->cpu = qemu_get_cpu(s->cpu_num);
124 if (!s->cpu) {
125 error_setg(errp, "Specified boot CPU#%d is nonexistent",
126 s->cpu_num);
127 return;
128 }
129 } else {
130 s->cpu = first_cpu;
131 }
132
133 #ifdef TARGET_WORDS_BIGENDIAN
134 big_endian = 1;
135 #else
136 big_endian = 0;
137 #endif
138
139 if (s->file) {
140 if (!s->force_raw) {
141 size = load_elf_as(s->file, NULL, NULL, &entry, NULL, NULL,
142 big_endian, 0, 0, 0, s->cpu->as);
143
144 if (size < 0) {
145 size = load_uimage_as(s->file, &entry, NULL, NULL, NULL, NULL,
146 s->cpu->as);
147 }
148 }
149
150 if (size < 0 || s->force_raw) {
151 /* Default to the maximum size being the machine's ram size */
152 size = load_image_targphys_as(s->file, s->addr, ram_size,
153 s->cpu->as);
154 } else {
155 s->addr = entry;
156 }
157
158 if (size < 0) {
159 error_setg(errp, "Cannot load specified image %s", s->file);
160 return;
161 }
162 }
163
164 /* Convert the data endiannes */
165 if (s->data_be) {
166 s->data = cpu_to_be64(s->data);
167 } else {
168 s->data = cpu_to_le64(s->data);
169 }
170 }
171
172 static void generic_loader_unrealize(DeviceState *dev, Error **errp)
173 {
174 qemu_unregister_reset(generic_loader_reset, dev);
175 }
176
177 static Property generic_loader_props[] = {
178 DEFINE_PROP_UINT64("addr", GenericLoaderState, addr, 0),
179 DEFINE_PROP_UINT64("data", GenericLoaderState, data, 0),
180 DEFINE_PROP_UINT8("data-len", GenericLoaderState, data_len, 0),
181 DEFINE_PROP_BOOL("data-be", GenericLoaderState, data_be, false),
182 DEFINE_PROP_UINT32("cpu-num", GenericLoaderState, cpu_num, CPU_NONE),
183 DEFINE_PROP_BOOL("force-raw", GenericLoaderState, force_raw, false),
184 DEFINE_PROP_STRING("file", GenericLoaderState, file),
185 DEFINE_PROP_END_OF_LIST(),
186 };
187
188 static void generic_loader_class_init(ObjectClass *klass, void *data)
189 {
190 DeviceClass *dc = DEVICE_CLASS(klass);
191
192 /* The reset function is not registered here and is instead registered in
193 * the realize function to allow this device to be added via the device_add
194 * command in the QEMU monitor.
195 * TODO: Improve the device_add functionality to allow resets to be
196 * connected
197 */
198 dc->realize = generic_loader_realize;
199 dc->unrealize = generic_loader_unrealize;
200 dc->props = generic_loader_props;
201 dc->desc = "Generic Loader";
202 }
203
204 static TypeInfo generic_loader_info = {
205 .name = TYPE_GENERIC_LOADER,
206 .parent = TYPE_DEVICE,
207 .instance_size = sizeof(GenericLoaderState),
208 .class_init = generic_loader_class_init,
209 };
210
211 static void generic_loader_register_type(void)
212 {
213 type_register_static(&generic_loader_info);
214 }
215
216 type_init(generic_loader_register_type)