1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Google, Inc
10 #include <linux/libfdt.h>
13 #ifndef CONFIG_SYS_BOOTM_LEN
14 #define CONFIG_SYS_BOOTM_LEN (64 << 20)
18 * spl_fit_get_image_name(): By using the matching configuration subnode,
19 * retrieve the name of an image, specified by a property name and an index
21 * @fit: Pointer to the FDT blob.
22 * @images: Offset of the /images subnode.
23 * @type: Name of the property within the configuration subnode.
24 * @index: Index into the list of strings in this property.
25 * @outname: Name of the image
27 * Return: 0 on success, or a negative error number
29 static int spl_fit_get_image_name(const void *fit, int images,
30 const char *type, int index,
33 const char *name, *str;
34 __maybe_unused int node;
38 conf_node = fit_find_config_node(fit);
40 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
41 printf("No matching DT out of these options:\n");
42 for (node = fdt_first_subnode(fit, conf_node);
44 node = fdt_next_subnode(fit, node)) {
45 name = fdt_getprop(fit, node, "description", &len);
46 printf(" %s\n", name);
52 name = fdt_getprop(fit, conf_node, type, &len);
54 debug("cannot find property '%s': %d\n", type, len);
59 for (i = 0; i < index; i++) {
60 str = strchr(str, '\0') + 1;
61 if (!str || (str - name >= len)) {
62 debug("no string for index %d\n", index);
67 *outname = (char *)str;
72 * spl_fit_get_image_node(): By using the matching configuration subnode,
73 * retrieve the name of an image, specified by a property name and an index
75 * @fit: Pointer to the FDT blob.
76 * @images: Offset of the /images subnode.
77 * @type: Name of the property within the configuration subnode.
78 * @index: Index into the list of strings in this property.
80 * Return: the node offset of the respective image node or a negative
83 static int spl_fit_get_image_node(const void *fit, int images,
84 const char *type, int index)
90 err = spl_fit_get_image_name(fit, images, type, index, &str);
94 debug("%s: '%s'\n", type, str);
96 node = fdt_subnode_offset(fit, images, str);
98 debug("cannot find image node '%s': %d\n", str, node);
105 static int get_aligned_image_offset(struct spl_load_info *info, int offset)
108 * If it is a FS read, get the first address before offset which is
109 * aligned to ARCH_DMA_MINALIGN. If it is raw read return the
110 * block number to which offset belongs.
113 return offset & ~(ARCH_DMA_MINALIGN - 1);
115 return offset / info->bl_len;
118 static int get_aligned_image_overhead(struct spl_load_info *info, int offset)
121 * If it is a FS read, get the difference between the offset and
122 * the first address before offset which is aligned to
123 * ARCH_DMA_MINALIGN. If it is raw read return the offset within the
127 return offset & (ARCH_DMA_MINALIGN - 1);
129 return offset % info->bl_len;
132 static int get_aligned_image_size(struct spl_load_info *info, int data_size,
135 data_size = data_size + get_aligned_image_overhead(info, offset);
140 return (data_size + info->bl_len - 1) / info->bl_len;
144 * spl_load_fit_image(): load the image described in a certain FIT node
145 * @info: points to information about the device to load data from
146 * @sector: the start sector of the FIT image on the device
147 * @fit: points to the flattened device tree blob describing the FIT
149 * @base_offset: the beginning of the data area containing the actual
150 * image data, relative to the beginning of the FIT
151 * @node: offset of the DT node describing the image to load (relative
153 * @image_info: will be filled with information about the loaded image
154 * If the FIT node does not contain a "load" (address) property,
155 * the image gets loaded to the address pointed to by the
156 * load_addr member in this struct.
158 * Return: 0 on success or a negative error number.
160 static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
161 void *fit, ulong base_offset, int node,
162 struct spl_image_info *image_info)
168 ulong load_addr, load_ptr;
172 int align_len = ARCH_DMA_MINALIGN - 1;
173 uint8_t image_comp = -1, type = -1;
175 bool external_data = false;
176 #ifdef CONFIG_SPL_FIT_SIGNATURE
180 if (IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_GZIP)) {
181 if (fit_image_get_comp(fit, node, &image_comp))
182 puts("Cannot get image compression format.\n");
184 debug("%s ", genimg_get_comp_name(image_comp));
186 if (fit_image_get_type(fit, node, &type))
187 puts("Cannot get image type.\n");
189 debug("%s ", genimg_get_type_name(type));
192 if (fit_image_get_load(fit, node, &load_addr))
193 load_addr = image_info->load_addr;
195 if (!fit_image_get_data_position(fit, node, &offset)) {
196 external_data = true;
197 } else if (!fit_image_get_data_offset(fit, node, &offset)) {
198 offset += base_offset;
199 external_data = true;
204 if (fit_image_get_data_size(fit, node, &len))
207 load_ptr = (load_addr + align_len) & ~align_len;
210 overhead = get_aligned_image_overhead(info, offset);
211 nr_sectors = get_aligned_image_size(info, length, offset);
214 sector + get_aligned_image_offset(info, offset),
215 nr_sectors, (void *)load_ptr) != nr_sectors)
218 debug("External data: dst=%lx, offset=%x, size=%lx\n",
219 load_ptr, offset, (unsigned long)length);
220 src = (void *)load_ptr + overhead;
223 if (fit_image_get_data(fit, node, &data, &length)) {
224 puts("Cannot get image data/size\n");
227 debug("Embedded data: dst=%lx, size=%lx\n", load_addr,
228 (unsigned long)length);
232 #ifdef CONFIG_SPL_FIT_IMAGE_POST_PROCESS
233 board_fit_image_post_process(&src, &length);
236 if (IS_ENABLED(CONFIG_SPL_OS_BOOT) &&
237 IS_ENABLED(CONFIG_SPL_GZIP) &&
238 image_comp == IH_COMP_GZIP &&
239 type == IH_TYPE_KERNEL) {
241 if (gunzip((void *)load_addr, CONFIG_SYS_BOOTM_LEN,
243 puts("Uncompressing error\n");
248 memcpy((void *)load_addr, src, length);
252 image_info->load_addr = load_addr;
253 image_info->size = length;
254 image_info->entry_point = fdt_getprop_u32(fit, node, "entry");
257 #ifdef CONFIG_SPL_FIT_SIGNATURE
258 printf("## Checking hash(es) for Image %s ...\n",
259 fit_get_name(fit, node, NULL));
260 ret = fit_image_verify_with_data(fit, node,
261 (const void *)load_addr, length);
269 static int spl_fit_append_fdt(struct spl_image_info *spl_image,
270 struct spl_load_info *info, ulong sector,
271 void *fit, int images, ulong base_offset)
273 struct spl_image_info image_info;
276 /* Figure out which device tree the board wants to use */
277 node = spl_fit_get_image_node(fit, images, FIT_FDT_PROP, 0);
279 debug("%s: cannot find FDT node\n", __func__);
284 * Read the device tree and place it after the image.
285 * Align the destination address to ARCH_DMA_MINALIGN.
287 image_info.load_addr = spl_image->load_addr + spl_image->size;
288 ret = spl_load_fit_image(info, sector, fit, base_offset, node,
294 /* Make the load-address of the FDT available for the SPL framework */
295 spl_image->fdt_addr = (void *)image_info.load_addr;
296 #if !CONFIG_IS_ENABLED(FIT_IMAGE_TINY)
297 /* Try to make space, so we can inject details on the loadables */
298 ret = fdt_shrink_to_minimum(spl_image->fdt_addr, 8192);
304 static int spl_fit_record_loadable(const void *fit, int images, int index,
305 void *blob, struct spl_image_info *image)
308 #if !CONFIG_IS_ENABLED(FIT_IMAGE_TINY)
312 ret = spl_fit_get_image_name(fit, images, "loadables",
317 node = spl_fit_get_image_node(fit, images, "loadables", index);
319 ret = fdt_record_loadable(blob, index, name, image->load_addr,
320 image->size, image->entry_point,
321 fdt_getprop(fit, node, "type", NULL),
322 fdt_getprop(fit, node, "os", NULL));
327 static int spl_fit_image_get_os(const void *fit, int noffset, uint8_t *os)
329 #if CONFIG_IS_ENABLED(FIT_IMAGE_TINY)
332 return fit_image_get_os(fit, noffset, os);
336 int spl_load_simple_fit(struct spl_image_info *spl_image,
337 struct spl_load_info *info, ulong sector, void *fit)
342 struct spl_image_info image_info;
345 int base_offset, align_len = ARCH_DMA_MINALIGN - 1;
349 * For FIT with external data, figure out where the external images
350 * start. This is the base for the data-offset properties in each
353 size = fdt_totalsize(fit);
354 size = (size + 3) & ~3;
355 base_offset = (size + 3) & ~3;
358 * So far we only have one block of data from the FIT. Read the entire
359 * thing, including that first block, placing it so it finishes before
360 * where we will load the image.
362 * Note that we will load the image such that its first byte will be
363 * at the load address. Since that byte may be part-way through a
364 * block, we may load the image up to one block before the load
365 * address. So take account of that here by subtracting an addition
366 * block length from the FIT start position.
368 * In fact the FIT has its own load address, but we assume it cannot
369 * be before CONFIG_SYS_TEXT_BASE.
371 * For FIT with data embedded, data is loaded as part of FIT image.
372 * For FIT with external data, data is not loaded in this step.
374 fit = (void *)((CONFIG_SYS_TEXT_BASE - size - info->bl_len -
375 align_len) & ~align_len);
376 sectors = get_aligned_image_size(info, size, 0);
377 count = info->read(info, sector, sectors, fit);
378 debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu\n",
379 sector, sectors, fit, count);
383 /* find the node holding the images information */
384 images = fdt_path_offset(fit, FIT_IMAGES_PATH);
386 debug("%s: Cannot find /images node: %d\n", __func__, images);
391 * Find the U-Boot image using the following search order:
392 * - start at 'firmware' (e.g. an ARM Trusted Firmware)
393 * - fall back 'kernel' (e.g. a Falcon-mode OS boot
394 * - fall back to using the first 'loadables' entry
397 node = spl_fit_get_image_node(fit, images, FIT_FIRMWARE_PROP,
399 #ifdef CONFIG_SPL_OS_BOOT
401 node = spl_fit_get_image_node(fit, images, FIT_KERNEL_PROP, 0);
404 debug("could not find firmware image, trying loadables...\n");
405 node = spl_fit_get_image_node(fit, images, "loadables", 0);
407 * If we pick the U-Boot image from "loadables", start at
408 * the second image when later loading additional images.
413 debug("%s: Cannot find u-boot image node: %d\n",
418 /* Load the image and set up the spl_image structure */
419 ret = spl_load_fit_image(info, sector, fit, base_offset, node,
425 * For backward compatibility, we treat the first node that is
426 * as a U-Boot image, if no OS-type has been declared.
428 if (!spl_fit_image_get_os(fit, node, &spl_image->os))
429 debug("Image OS is %s\n", genimg_get_os_name(spl_image->os));
430 #if !defined(CONFIG_SPL_OS_BOOT)
432 spl_image->os = IH_OS_U_BOOT;
436 * Booting a next-stage U-Boot may require us to append the FDT.
437 * We allow this to fail, as the U-Boot image might embed its FDT.
439 if (spl_image->os == IH_OS_U_BOOT)
440 spl_fit_append_fdt(spl_image, info, sector, fit,
441 images, base_offset);
443 /* Now check if there are more images for us to load */
445 uint8_t os_type = IH_OS_INVALID;
447 node = spl_fit_get_image_node(fit, images, "loadables", index);
451 ret = spl_load_fit_image(info, sector, fit, base_offset, node,
456 if (!spl_fit_image_get_os(fit, node, &os_type))
457 debug("Loadable is %s\n", genimg_get_os_name(os_type));
459 if (os_type == IH_OS_U_BOOT) {
460 spl_fit_append_fdt(&image_info, info, sector,
461 fit, images, base_offset);
462 spl_image->fdt_addr = image_info.fdt_addr;
466 * If the "firmware" image did not provide an entry point,
467 * use the first valid entry point from the loadables.
469 if (spl_image->entry_point == FDT_ERROR &&
470 image_info.entry_point != FDT_ERROR)
471 spl_image->entry_point = image_info.entry_point;
473 /* Record our loadables into the FDT */
474 if (spl_image->fdt_addr)
475 spl_fit_record_loadable(fit, images, index,
481 * If a platform does not provide CONFIG_SYS_UBOOT_START, U-Boot's
482 * Makefile will set it to 0 and it will end up as the entry point
483 * here. What it actually means is: use the load address.
485 if (spl_image->entry_point == FDT_ERROR || spl_image->entry_point == 0)
486 spl_image->entry_point = spl_image->load_addr;