2 * Flattened Image Tree loader.
4 * Copyright (c) 2016 Imagination Technologies
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.
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.
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/>.
20 #include "qemu/osdep.h"
21 #include "exec/address-spaces.h"
22 #include "exec/memory.h"
23 #include "hw/loader.h"
24 #include "hw/loader-fit.h"
25 #include "qemu/cutils.h"
26 #include "qemu/error-report.h"
27 #include "sysemu/device_tree.h"
28 #include "sysemu/sysemu.h"
33 #define FIT_LOADER_MAX_PATH (128)
35 static const void *fit_load_image_alloc(const void *itb, const char *name,
36 int *poff, size_t *psz)
41 char path[FIT_LOADER_MAX_PATH];
45 snprintf(path, sizeof(path), "/images/%s", name);
47 off = fdt_path_offset(itb, path);
55 data = fdt_getprop(itb, off, "data", &sz);
60 comp = fdt_getprop(itb, off, "compression", NULL);
61 if (!comp || !strcmp(comp, "none")) {
65 uncomp_data = g_malloc(sz);
66 memmove(uncomp_data, data, sz);
70 if (!strcmp(comp, "gzip")) {
71 uncomp_len = UBOOT_MAX_GUNZIP_BYTES;
72 uncomp_data = g_malloc(uncomp_len);
74 uncomp_len = gunzip(uncomp_data, uncomp_len, (void *) data, sz);
76 error_printf("unable to decompress %s image\n", name);
81 data = g_realloc(uncomp_data, uncomp_len);
88 error_printf("unknown compression '%s'\n", comp);
92 static int fit_image_addr(const void *itb, int img, const char *name,
98 prop = fdt_getprop(itb, img, name, &len);
105 *addr = fdt32_to_cpu(*(fdt32_t *)prop);
108 *addr = fdt64_to_cpu(*(fdt64_t *)prop);
111 error_printf("invalid %s address length %d\n", name, len);
116 static int fit_load_kernel(const struct fit_loader *ldr, const void *itb,
117 int cfg, void *opaque, hwaddr *pend)
121 const void *load_data;
122 hwaddr load_addr, entry_addr;
127 name = fdt_getprop(itb, cfg, "kernel", NULL);
129 error_printf("no kernel specified by FIT configuration\n");
133 load_data = data = fit_load_image_alloc(itb, name, &img_off, &sz);
135 error_printf("unable to load kernel image from FIT\n");
139 err = fit_image_addr(itb, img_off, "load", &load_addr);
141 error_printf("unable to read kernel load address from FIT\n");
146 err = fit_image_addr(itb, img_off, "entry", &entry_addr);
148 error_printf("unable to read kernel entry address from FIT\n");
153 if (ldr->kernel_filter) {
154 load_data = ldr->kernel_filter(opaque, data, &load_addr, &entry_addr);
158 *pend = load_addr + sz;
161 load_addr = ldr->addr_to_phys(opaque, load_addr);
162 rom_add_blob_fixed(name, load_data, sz, load_addr);
166 g_free((void *) data);
167 if (data != load_data) {
168 g_free((void *) load_data);
173 static int fit_load_fdt(const struct fit_loader *ldr, const void *itb,
174 int cfg, void *opaque, const void *match_data,
179 const void *load_data;
185 name = fdt_getprop(itb, cfg, "fdt", NULL);
190 load_data = data = fit_load_image_alloc(itb, name, &img_off, &sz);
192 error_printf("unable to load FDT image from FIT\n");
196 err = fit_image_addr(itb, img_off, "load", &load_addr);
197 if (err == -ENOENT) {
198 load_addr = ROUND_UP(kernel_end, 64 * K_BYTE) + (10 * M_BYTE);
204 if (ldr->fdt_filter) {
205 load_data = ldr->fdt_filter(opaque, data, match_data, &load_addr);
208 load_addr = ldr->addr_to_phys(opaque, load_addr);
209 sz = fdt_totalsize(load_data);
210 rom_add_blob_fixed(name, load_data, sz, load_addr);
214 g_free((void *) data);
215 if (data != load_data) {
216 g_free((void *) load_data);
221 static bool fit_cfg_compatible(const void *itb, int cfg, const char *compat)
224 const char *fdt_name;
227 fdt_name = fdt_getprop(itb, cfg, "fdt", NULL);
232 fdt = fit_load_image_alloc(itb, fdt_name, NULL, NULL);
237 if (fdt_check_header(fdt)) {
242 if (fdt_node_check_compatible(fdt, 0, compat)) {
249 g_free((void *) fdt);
253 int load_fit(const struct fit_loader *ldr, const char *filename, void *opaque)
255 const struct fit_loader_match *match;
256 const void *itb, *match_data = NULL;
257 const char *def_cfg_name;
258 char path[FIT_LOADER_MAX_PATH];
259 int itb_size, configs, cfg_off, off, err;
263 itb = load_device_tree(filename, &itb_size);
268 configs = fdt_path_offset(itb, "/configurations");
274 cfg_off = -FDT_ERR_NOTFOUND;
277 for (match = ldr->matches; match->compatible; match++) {
278 off = fdt_first_subnode(itb, configs);
280 if (fit_cfg_compatible(itb, off, match->compatible)) {
282 match_data = match->data;
286 off = fdt_next_subnode(itb, off);
296 def_cfg_name = fdt_getprop(itb, configs, "default", NULL);
298 snprintf(path, sizeof(path), "/configurations/%s", def_cfg_name);
299 cfg_off = fdt_path_offset(itb, path);
304 /* couldn't find a configuration to use */
309 err = fit_load_kernel(ldr, itb, cfg_off, opaque, &kernel_end);
315 err = fit_load_fdt(ldr, itb, cfg_off, opaque, match_data, kernel_end);
323 g_free((void *) itb);