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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
35static 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
94static 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
119static 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;
169out:
170 g_free((void *) data);
171 if (data != load_data) {
172 g_free((void *) load_data);
173 }
174 return ret;
175}
176
177static 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 const char *name;
182 const void *data;
183 const void *load_data;
184 hwaddr load_addr;
185 int img_off, err;
186 size_t sz;
187 int ret;
188
189 name = fdt_getprop(itb, cfg, "fdt", NULL);
190 if (!name) {
191 return 0;
192 }
193
194 load_data = data = fit_load_image_alloc(itb, name, &img_off, &sz, errp);
195 if (!data) {
196 error_prepend(errp, "unable to load FDT image from FIT: ");
197 return -EINVAL;
198 }
199
200 err = fit_image_addr(itb, img_off, "load", &load_addr, errp);
201 if (err == -ENOENT) {
202 load_addr = ROUND_UP(kernel_end, 64 * KiB) + (10 * MiB);
203 error_free(*errp);
204 } else if (err) {
205 error_prepend(errp, "unable to read FDT load address from FIT: ");
206 ret = err;
207 goto out;
208 }
209
210 if (ldr->fdt_filter) {
211 load_data = ldr->fdt_filter(opaque, data, match_data, &load_addr);
212 }
213
214 load_addr = ldr->addr_to_phys(opaque, load_addr);
215 sz = fdt_totalsize(load_data);
216 rom_add_blob_fixed(name, load_data, sz, load_addr);
217
218 ret = 0;
219out:
220 g_free((void *) data);
221 if (data != load_data) {
222 g_free((void *) load_data);
223 }
224 return ret;
225}
226
227static bool fit_cfg_compatible(const void *itb, int cfg, const char *compat)
228{
229 const void *fdt;
230 const char *fdt_name;
231 bool ret;
232
233 fdt_name = fdt_getprop(itb, cfg, "fdt", NULL);
234 if (!fdt_name) {
235 return false;
236 }
237
238 fdt = fit_load_image_alloc(itb, fdt_name, NULL, NULL, NULL);
239 if (!fdt) {
240 return false;
241 }
242
243 if (fdt_check_header(fdt)) {
244 ret = false;
245 goto out;
246 }
247
248 if (fdt_node_check_compatible(fdt, 0, compat)) {
249 ret = false;
250 goto out;
251 }
252
253 ret = true;
254out:
255 g_free((void *) fdt);
256 return ret;
257}
258
259int load_fit(const struct fit_loader *ldr, const char *filename, void *opaque)
260{
261 Error *err = NULL;
262 const struct fit_loader_match *match;
263 const void *itb, *match_data = NULL;
264 const char *def_cfg_name;
265 char path[FIT_LOADER_MAX_PATH];
266 int itb_size, configs, cfg_off, off;
267 hwaddr kernel_end;
268 int ret;
269
270 itb = load_device_tree(filename, &itb_size);
271 if (!itb) {
272 return -EINVAL;
273 }
274
275 configs = fdt_path_offset(itb, "/configurations");
276 if (configs < 0) {
277 error_report("can't find node /configurations");
278 ret = configs;
279 goto out;
280 }
281
282 cfg_off = -FDT_ERR_NOTFOUND;
283
284 if (ldr->matches) {
285 for (match = ldr->matches; match->compatible; match++) {
286 off = fdt_first_subnode(itb, configs);
287 while (off >= 0) {
288 if (fit_cfg_compatible(itb, off, match->compatible)) {
289 cfg_off = off;
290 match_data = match->data;
291 break;
292 }
293
294 off = fdt_next_subnode(itb, off);
295 }
296
297 if (cfg_off >= 0) {
298 break;
299 }
300 }
301 }
302
303 if (cfg_off < 0) {
304 def_cfg_name = fdt_getprop(itb, configs, "default", NULL);
305 if (def_cfg_name) {
306 snprintf(path, sizeof(path), "/configurations/%s", def_cfg_name);
307 cfg_off = fdt_path_offset(itb, path);
308 }
309 }
310
311 if (cfg_off < 0) {
312 error_report("can't find configuration");
313 ret = cfg_off;
314 goto out;
315 }
316
317 ret = fit_load_kernel(ldr, itb, cfg_off, opaque, &kernel_end, &err);
318 if (ret) {
319 error_report_err(err);
320 goto out;
321 }
322
323 ret = fit_load_fdt(ldr, itb, cfg_off, opaque, match_data, kernel_end,
324 &err);
325 if (ret) {
326 error_report_err(err);
327 goto out;
328 }
329
330 ret = 0;
331out:
332 g_free((void *) itb);
333 return ret;
334}
335
