hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / core / loader-fit.c
1 /*
2 * Flattened Image Tree loader.
3 *
4 * Copyright (c) 2016 Imagination Technologies
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qapi/error.h"
22 #include "qemu/units.h"
23 #include "exec/memory.h"
24 #include "hw/loader.h"
25 #include "hw/loader-fit.h"
26 #include "qemu/cutils.h"
27 #include "qemu/error-report.h"
28 #include "sysemu/device_tree.h"
29
30 #include <libfdt.h>
31 #include <zlib.h>
32
33 #define FIT_LOADER_MAX_PATH (128)
34
35 static const void *fit_load_image_alloc(const void *itb, const char *name,
36 int *poff, size_t *psz, Error **errp)
37 {
38 const void *data;
39 const char *comp;
40 void *uncomp_data;
41 char path[FIT_LOADER_MAX_PATH];
42 int off, sz;
43 ssize_t uncomp_len;
44
45 snprintf(path, sizeof(path), "/images/%s", name);
46
47 off = fdt_path_offset(itb, path);
48 if (off < 0) {
49 error_setg(errp, "can't find node %s", path);
50 return NULL;
51 }
52 if (poff) {
53 *poff = off;
54 }
55
56 data = fdt_getprop(itb, off, "data", &sz);
57 if (!data) {
58 error_setg(errp, "can't get %s/data", path);
59 return NULL;
60 }
61
62 comp = fdt_getprop(itb, off, "compression", NULL);
63 if (!comp || !strcmp(comp, "none")) {
64 if (psz) {
65 *psz = sz;
66 }
67 uncomp_data = g_malloc(sz);
68 memmove(uncomp_data, data, sz);
69 return uncomp_data;
70 }
71
72 if (!strcmp(comp, "gzip")) {
73 uncomp_len = UBOOT_MAX_GUNZIP_BYTES;
74 uncomp_data = g_malloc(uncomp_len);
75
76 uncomp_len = gunzip(uncomp_data, uncomp_len, (void *) data, sz);
77 if (uncomp_len < 0) {
78 error_setg(errp, "unable to decompress %s image", name);
79 g_free(uncomp_data);
80 return NULL;
81 }
82
83 data = g_realloc(uncomp_data, uncomp_len);
84 if (psz) {
85 *psz = uncomp_len;
86 }
87 return data;
88 }
89
90 error_setg(errp, "unknown compression '%s'", comp);
91 return NULL;
92 }
93
94 static int fit_image_addr(const void *itb, int img, const char *name,
95 hwaddr *addr, Error **errp)
96 {
97 const void *prop;
98 int len;
99
100 prop = fdt_getprop(itb, img, name, &len);
101 if (!prop) {
102 error_setg(errp, "can't find %s address", name);
103 return -ENOENT;
104 }
105
106 switch (len) {
107 case 4:
108 *addr = fdt32_to_cpu(*(fdt32_t *)prop);
109 return 0;
110 case 8:
111 *addr = fdt64_to_cpu(*(fdt64_t *)prop);
112 return 0;
113 default:
114 error_setg(errp, "invalid %s address length %d", name, len);
115 return -EINVAL;
116 }
117 }
118
119 static int fit_load_kernel(const struct fit_loader *ldr, const void *itb,
120 int cfg, void *opaque, hwaddr *pend,
121 Error **errp)
122 {
123 const char *name;
124 const void *data;
125 const void *load_data;
126 hwaddr load_addr, entry_addr;
127 int img_off, err;
128 size_t sz;
129 int ret;
130
131 name = fdt_getprop(itb, cfg, "kernel", NULL);
132 if (!name) {
133 error_setg(errp, "no kernel specified by FIT configuration");
134 return -EINVAL;
135 }
136
137 load_data = data = fit_load_image_alloc(itb, name, &img_off, &sz, errp);
138 if (!data) {
139 error_prepend(errp, "unable to load kernel image from FIT: ");
140 return -EINVAL;
141 }
142
143 err = fit_image_addr(itb, img_off, "load", &load_addr, errp);
144 if (err) {
145 error_prepend(errp, "unable to read kernel load address from FIT: ");
146 ret = err;
147 goto out;
148 }
149
150 err = fit_image_addr(itb, img_off, "entry", &entry_addr, errp);
151 if (err) {
152 error_prepend(errp, "unable to read kernel entry address from FIT: ");
153 ret = err;
154 goto out;
155 }
156
157 if (ldr->kernel_filter) {
158 load_data = ldr->kernel_filter(opaque, data, &load_addr, &entry_addr);
159 }
160
161 if (pend) {
162 *pend = load_addr + sz;
163 }
164
165 load_addr = ldr->addr_to_phys(opaque, load_addr);
166 rom_add_blob_fixed(name, load_data, sz, load_addr);
167
168 ret = 0;
169 out:
170 g_free((void *) data);
171 if (data != load_data) {
172 g_free((void *) load_data);
173 }
174 return ret;
175 }
176
177 static int fit_load_fdt(const struct fit_loader *ldr, const void *itb,
178 int cfg, void *opaque, const void *match_data,
179 hwaddr kernel_end, Error **errp)
180 {
181 Error *err = NULL;
182 const char *name;
183 const void *data;
184 const void *load_data;
185 hwaddr load_addr;
186 int img_off;
187 size_t sz;
188 int ret;
189
190 name = fdt_getprop(itb, cfg, "fdt", NULL);
191 if (!name) {
192 return 0;
193 }
194
195 load_data = data = fit_load_image_alloc(itb, name, &img_off, &sz, errp);
196 if (!data) {
197 error_prepend(errp, "unable to load FDT image from FIT: ");
198 return -EINVAL;
199 }
200
201 ret = fit_image_addr(itb, img_off, "load", &load_addr, &err);
202 if (ret == -ENOENT) {
203 load_addr = ROUND_UP(kernel_end, 64 * KiB) + (10 * MiB);
204 error_free(err);
205 } else if (ret) {
206 error_propagate_prepend(errp, err,
207 "unable to read FDT load address from FIT: ");
208 goto out;
209 }
210
211 if (ldr->fdt_filter) {
212 load_data = ldr->fdt_filter(opaque, data, match_data, &load_addr);
213 }
214
215 load_addr = ldr->addr_to_phys(opaque, load_addr);
216 sz = fdt_totalsize(load_data);
217 rom_add_blob_fixed(name, load_data, sz, load_addr);
218
219 ret = 0;
220 out:
221 g_free((void *) data);
222 if (data != load_data) {
223 g_free((void *) load_data);
224 }
225 return ret;
226 }
227
228 static bool fit_cfg_compatible(const void *itb, int cfg, const char *compat)
229 {
230 const void *fdt;
231 const char *fdt_name;
232 bool ret;
233
234 fdt_name = fdt_getprop(itb, cfg, "fdt", NULL);
235 if (!fdt_name) {
236 return false;
237 }
238
239 fdt = fit_load_image_alloc(itb, fdt_name, NULL, NULL, NULL);
240 if (!fdt) {
241 return false;
242 }
243
244 if (fdt_check_header(fdt)) {
245 ret = false;
246 goto out;
247 }
248
249 if (fdt_node_check_compatible(fdt, 0, compat)) {
250 ret = false;
251 goto out;
252 }
253
254 ret = true;
255 out:
256 g_free((void *) fdt);
257 return ret;
258 }
259
260 int load_fit(const struct fit_loader *ldr, const char *filename, void *opaque)
261 {
262 Error *err = NULL;
263 const struct fit_loader_match *match;
264 const void *itb, *match_data = NULL;
265 const char *def_cfg_name;
266 char path[FIT_LOADER_MAX_PATH];
267 int itb_size, configs, cfg_off, off;
268 hwaddr kernel_end;
269 int ret;
270
271 itb = load_device_tree(filename, &itb_size);
272 if (!itb) {
273 return -EINVAL;
274 }
275
276 configs = fdt_path_offset(itb, "/configurations");
277 if (configs < 0) {
278 error_report("can't find node /configurations");
279 ret = configs;
280 goto out;
281 }
282
283 cfg_off = -FDT_ERR_NOTFOUND;
284
285 if (ldr->matches) {
286 for (match = ldr->matches; match->compatible; match++) {
287 off = fdt_first_subnode(itb, configs);
288 while (off >= 0) {
289 if (fit_cfg_compatible(itb, off, match->compatible)) {
290 cfg_off = off;
291 match_data = match->data;
292 break;
293 }
294
295 off = fdt_next_subnode(itb, off);
296 }
297
298 if (cfg_off >= 0) {
299 break;
300 }
301 }
302 }
303
304 if (cfg_off < 0) {
305 def_cfg_name = fdt_getprop(itb, configs, "default", NULL);
306 if (def_cfg_name) {
307 snprintf(path, sizeof(path), "/configurations/%s", def_cfg_name);
308 cfg_off = fdt_path_offset(itb, path);
309 }
310 }
311
312 if (cfg_off < 0) {
313 error_report("can't find configuration");
314 ret = cfg_off;
315 goto out;
316 }
317
318 ret = fit_load_kernel(ldr, itb, cfg_off, opaque, &kernel_end, &err);
319 if (ret) {
320 error_report_err(err);
321 goto out;
322 }
323
324 ret = fit_load_fdt(ldr, itb, cfg_off, opaque, match_data, kernel_end,
325 &err);
326 if (ret) {
327 error_report_err(err);
328 goto out;
329 }
330
331 ret = 0;
332 out:
333 g_free((void *) itb);
334 return ret;
335 }