1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
14 #include <linux/libfdt.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 #ifndef CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
19 #define CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ (64 * 1024)
22 #ifndef CONFIG_SYS_BOOTM_LEN
23 #define CONFIG_SYS_BOOTM_LEN (64 << 20)
26 __weak void board_spl_fit_post_load(ulong load_addr, size_t length)
30 __weak ulong board_spl_fit_size_align(ulong size)
36 * spl_fit_get_image_name(): By using the matching configuration subnode,
37 * retrieve the name of an image, specified by a property name and an index
39 * @fit: Pointer to the FDT blob.
40 * @images: Offset of the /images subnode.
41 * @type: Name of the property within the configuration subnode.
42 * @index: Index into the list of strings in this property.
43 * @outname: Name of the image
45 * Return: 0 on success, or a negative error number
47 static int spl_fit_get_image_name(const void *fit, int images,
48 const char *type, int index,
51 const char *name, *str;
52 __maybe_unused int node;
56 conf_node = fit_find_config_node(fit);
58 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
59 printf("No matching DT out of these options:\n");
60 for (node = fdt_first_subnode(fit, conf_node);
62 node = fdt_next_subnode(fit, node)) {
63 name = fdt_getprop(fit, node, "description", &len);
64 printf(" %s\n", name);
70 name = fdt_getprop(fit, conf_node, type, &len);
72 debug("cannot find property '%s': %d\n", type, len);
77 for (i = 0; i < index; i++) {
78 str = strchr(str, '\0') + 1;
79 if (!str || (str - name >= len)) {
80 debug("no string for index %d\n", index);
85 *outname = (char *)str;
90 * spl_fit_get_image_node(): By using the matching configuration subnode,
91 * retrieve the name of an image, specified by a property name and an index
93 * @fit: Pointer to the FDT blob.
94 * @images: Offset of the /images subnode.
95 * @type: Name of the property within the configuration subnode.
96 * @index: Index into the list of strings in this property.
98 * Return: the node offset of the respective image node or a negative
101 static int spl_fit_get_image_node(const void *fit, int images,
102 const char *type, int index)
108 err = spl_fit_get_image_name(fit, images, type, index, &str);
112 debug("%s: '%s'\n", type, str);
114 node = fdt_subnode_offset(fit, images, str);
116 pr_err("cannot find image node '%s': %d\n", str, node);
123 static int get_aligned_image_offset(struct spl_load_info *info, int offset)
126 * If it is a FS read, get the first address before offset which is
127 * aligned to ARCH_DMA_MINALIGN. If it is raw read return the
128 * block number to which offset belongs.
131 return offset & ~(ARCH_DMA_MINALIGN - 1);
133 return offset / info->bl_len;
136 static int get_aligned_image_overhead(struct spl_load_info *info, int offset)
139 * If it is a FS read, get the difference between the offset and
140 * the first address before offset which is aligned to
141 * ARCH_DMA_MINALIGN. If it is raw read return the offset within the
145 return offset & (ARCH_DMA_MINALIGN - 1);
147 return offset % info->bl_len;
150 static int get_aligned_image_size(struct spl_load_info *info, int data_size,
153 data_size = data_size + get_aligned_image_overhead(info, offset);
158 return (data_size + info->bl_len - 1) / info->bl_len;
162 * spl_load_fit_image(): load the image described in a certain FIT node
163 * @info: points to information about the device to load data from
164 * @sector: the start sector of the FIT image on the device
165 * @fit: points to the flattened device tree blob describing the FIT
167 * @base_offset: the beginning of the data area containing the actual
168 * image data, relative to the beginning of the FIT
169 * @node: offset of the DT node describing the image to load (relative
171 * @image_info: will be filled with information about the loaded image
172 * If the FIT node does not contain a "load" (address) property,
173 * the image gets loaded to the address pointed to by the
174 * load_addr member in this struct.
176 * Return: 0 on success or a negative error number.
178 static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
179 void *fit, ulong base_offset, int node,
180 struct spl_image_info *image_info)
186 ulong load_addr, load_ptr;
190 int align_len = ARCH_DMA_MINALIGN - 1;
191 uint8_t image_comp = -1, type = -1;
193 bool external_data = false;
195 if (IS_ENABLED(CONFIG_SPL_FPGA_SUPPORT) ||
196 (IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_GZIP))) {
197 if (fit_image_get_type(fit, node, &type))
198 puts("Cannot get image type.\n");
200 debug("%s ", genimg_get_type_name(type));
203 if (IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_GZIP)) {
204 if (fit_image_get_comp(fit, node, &image_comp))
205 puts("Cannot get image compression format.\n");
207 debug("%s ", genimg_get_comp_name(image_comp));
210 if (fit_image_get_load(fit, node, &load_addr))
211 load_addr = image_info->load_addr;
213 if (!fit_image_get_data_position(fit, node, &offset)) {
214 external_data = true;
215 } else if (!fit_image_get_data_offset(fit, node, &offset)) {
216 offset += base_offset;
217 external_data = true;
222 if (fit_image_get_data_size(fit, node, &len))
225 load_ptr = (load_addr + align_len) & ~align_len;
228 overhead = get_aligned_image_overhead(info, offset);
229 nr_sectors = get_aligned_image_size(info, length, offset);
232 sector + get_aligned_image_offset(info, offset),
233 nr_sectors, (void *)load_ptr) != nr_sectors)
236 debug("External data: dst=%lx, offset=%x, size=%lx\n",
237 load_ptr, offset, (unsigned long)length);
238 src = (void *)load_ptr + overhead;
241 if (fit_image_get_data(fit, node, &data, &length)) {
242 puts("Cannot get image data/size\n");
245 debug("Embedded data: dst=%lx, size=%lx\n", load_addr,
246 (unsigned long)length);
250 #ifdef CONFIG_SPL_FIT_SIGNATURE
251 printf("## Checking hash(es) for Image %s ... ",
252 fit_get_name(fit, node, NULL));
253 if (!fit_image_verify_with_data(fit, node,
259 #ifdef CONFIG_SPL_FIT_IMAGE_POST_PROCESS
260 board_fit_image_post_process(&src, &length);
263 if (IS_ENABLED(CONFIG_SPL_GZIP) && image_comp == IH_COMP_GZIP) {
265 if (gunzip((void *)load_addr, CONFIG_SYS_BOOTM_LEN,
267 puts("Uncompressing error\n");
272 memcpy((void *)load_addr, src, length);
276 image_info->load_addr = load_addr;
277 image_info->size = length;
278 image_info->entry_point = fdt_getprop_u32(fit, node, "entry");
284 static int spl_fit_append_fdt(struct spl_image_info *spl_image,
285 struct spl_load_info *info, ulong sector,
286 void *fit, int images, ulong base_offset)
288 struct spl_image_info image_info;
289 int node, ret = 0, index = 0;
292 * Use the address following the image as target address for the
295 image_info.load_addr = spl_image->load_addr + spl_image->size;
297 /* Figure out which device tree the board wants to use */
298 node = spl_fit_get_image_node(fit, images, FIT_FDT_PROP, index++);
300 debug("%s: cannot find FDT node\n", __func__);
303 * U-Boot did not find a device tree inside the FIT image. Use
304 * the U-Boot device tree instead.
307 memcpy((void *)image_info.load_addr, gd->fdt_blob,
308 fdt_totalsize(gd->fdt_blob));
312 ret = spl_load_fit_image(info, sector, fit, base_offset, node,
318 /* Make the load-address of the FDT available for the SPL framework */
319 spl_image->fdt_addr = (void *)image_info.load_addr;
320 #if !CONFIG_IS_ENABLED(FIT_IMAGE_TINY)
321 if (CONFIG_IS_ENABLED(LOAD_FIT_APPLY_OVERLAY)) {
322 void *tmpbuffer = NULL;
325 node = spl_fit_get_image_node(fit, images, FIT_FDT_PROP,
327 if (node == -E2BIG) {
328 debug("%s: No additional FDT node\n", __func__);
330 } else if (node < 0) {
331 debug("%s: unable to find FDT node %d\n",
338 * allocate memory to store the DT overlay
339 * before it is applied. It may not be used
340 * depending on how the overlay is stored, so
341 * don't fail yet if the allocation failed.
343 tmpbuffer = malloc(CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ);
345 debug("%s: unable to allocate space for overlays\n",
348 image_info.load_addr = (ulong)tmpbuffer;
349 ret = spl_load_fit_image(info, sector, fit, base_offset,
354 /* Make room in FDT for changes from the overlay */
355 ret = fdt_increase_size(spl_image->fdt_addr,
360 ret = fdt_overlay_apply_verbose(spl_image->fdt_addr,
361 (void *)image_info.load_addr);
363 pr_err("failed to apply DT overlay %s\n",
364 fit_get_name(fit, node, NULL));
368 debug("%s: DT overlay %s applied\n", __func__,
369 fit_get_name(fit, node, NULL));
376 /* Try to make space, so we can inject details on the loadables */
377 ret = fdt_shrink_to_minimum(spl_image->fdt_addr, 8192);
385 static int spl_fit_record_loadable(const void *fit, int images, int index,
386 void *blob, struct spl_image_info *image)
389 #if !CONFIG_IS_ENABLED(FIT_IMAGE_TINY)
393 ret = spl_fit_get_image_name(fit, images, "loadables",
398 node = spl_fit_get_image_node(fit, images, "loadables", index);
400 ret = fdt_record_loadable(blob, index, name, image->load_addr,
401 image->size, image->entry_point,
402 fdt_getprop(fit, node, "type", NULL),
403 fdt_getprop(fit, node, "os", NULL));
408 static int spl_fit_image_get_os(const void *fit, int noffset, uint8_t *os)
410 #if CONFIG_IS_ENABLED(FIT_IMAGE_TINY) && !defined(CONFIG_SPL_OS_BOOT)
413 return fit_image_get_os(fit, noffset, os);
418 * Weak default function to allow customizing SPL fit loading for load-only
419 * use cases by allowing to skip the parsing/processing of the FIT contents
420 * (so that this can be done separately in a more customized fashion)
422 __weak bool spl_load_simple_fit_skip_processing(void)
427 int spl_load_simple_fit(struct spl_image_info *spl_image,
428 struct spl_load_info *info, ulong sector, void *fit)
433 struct spl_image_info image_info;
436 int base_offset, hsize, align_len = ARCH_DMA_MINALIGN - 1;
441 * For FIT with external data, figure out where the external images
442 * start. This is the base for the data-offset properties in each
445 size = fdt_totalsize(fit);
446 size = (size + 3) & ~3;
447 size = board_spl_fit_size_align(size);
448 base_offset = (size + 3) & ~3;
451 * So far we only have one block of data from the FIT. Read the entire
452 * thing, including that first block, placing it so it finishes before
453 * where we will load the image.
455 * Note that we will load the image such that its first byte will be
456 * at the load address. Since that byte may be part-way through a
457 * block, we may load the image up to one block before the load
458 * address. So take account of that here by subtracting an addition
459 * block length from the FIT start position.
461 * In fact the FIT has its own load address, but we assume it cannot
462 * be before CONFIG_SYS_TEXT_BASE.
464 * For FIT with data embedded, data is loaded as part of FIT image.
465 * For FIT with external data, data is not loaded in this step.
467 hsize = (size + info->bl_len + align_len) & ~align_len;
468 fit = spl_get_load_buffer(-hsize, hsize);
469 sectors = get_aligned_image_size(info, size, 0);
470 count = info->read(info, sector, sectors, fit);
471 debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu, size=0x%lx\n",
472 sector, sectors, fit, count, size);
477 /* skip further processing if requested to enable load-only use cases */
478 if (spl_load_simple_fit_skip_processing())
481 /* find the node holding the images information */
482 images = fdt_path_offset(fit, FIT_IMAGES_PATH);
484 debug("%s: Cannot find /images node: %d\n", __func__, images);
488 #ifdef CONFIG_SPL_FPGA_SUPPORT
489 node = spl_fit_get_image_node(fit, images, "fpga", 0);
491 /* Load the image and set up the spl_image structure */
492 ret = spl_load_fit_image(info, sector, fit, base_offset, node,
495 printf("%s: Cannot load the FPGA: %i\n", __func__, ret);
499 debug("FPGA bitstream at: %x, size: %x\n",
500 (u32)spl_image->load_addr, spl_image->size);
502 ret = fpga_load(0, (const void *)spl_image->load_addr,
503 spl_image->size, BIT_FULL);
505 printf("%s: Cannot load the image to the FPGA\n",
510 puts("FPGA image loaded from FIT\n");
516 * Find the U-Boot image using the following search order:
517 * - start at 'firmware' (e.g. an ARM Trusted Firmware)
518 * - fall back 'kernel' (e.g. a Falcon-mode OS boot
519 * - fall back to using the first 'loadables' entry
522 node = spl_fit_get_image_node(fit, images, FIT_FIRMWARE_PROP,
524 #ifdef CONFIG_SPL_OS_BOOT
526 node = spl_fit_get_image_node(fit, images, FIT_KERNEL_PROP, 0);
529 debug("could not find firmware image, trying loadables...\n");
530 node = spl_fit_get_image_node(fit, images, "loadables", 0);
532 * If we pick the U-Boot image from "loadables", start at
533 * the second image when later loading additional images.
538 debug("%s: Cannot find u-boot image node: %d\n",
543 /* Load the image and set up the spl_image structure */
544 ret = spl_load_fit_image(info, sector, fit, base_offset, node,
550 * For backward compatibility, we treat the first node that is
551 * as a U-Boot image, if no OS-type has been declared.
553 if (!spl_fit_image_get_os(fit, node, &spl_image->os))
554 debug("Image OS is %s\n", genimg_get_os_name(spl_image->os));
555 #if !defined(CONFIG_SPL_OS_BOOT)
557 spl_image->os = IH_OS_U_BOOT;
561 * Booting a next-stage U-Boot may require us to append the FDT.
562 * We allow this to fail, as the U-Boot image might embed its FDT.
564 if (spl_image->os == IH_OS_U_BOOT)
565 spl_fit_append_fdt(spl_image, info, sector, fit,
566 images, base_offset);
568 firmware_node = node;
569 /* Now check if there are more images for us to load */
571 uint8_t os_type = IH_OS_INVALID;
573 node = spl_fit_get_image_node(fit, images, "loadables", index);
578 * if the firmware is also a loadable, skip it because
579 * it already has been loaded. This is typically the case with
580 * u-boot.img generated by mkimage.
582 if (firmware_node == node)
585 ret = spl_load_fit_image(info, sector, fit, base_offset, node,
590 if (!spl_fit_image_get_os(fit, node, &os_type))
591 debug("Loadable is %s\n", genimg_get_os_name(os_type));
592 #if CONFIG_IS_ENABLED(FIT_IMAGE_TINY)
594 os_type = IH_OS_U_BOOT;
597 if (os_type == IH_OS_U_BOOT) {
598 spl_fit_append_fdt(&image_info, info, sector,
599 fit, images, base_offset);
600 spl_image->fdt_addr = image_info.fdt_addr;
604 * If the "firmware" image did not provide an entry point,
605 * use the first valid entry point from the loadables.
607 if (spl_image->entry_point == FDT_ERROR &&
608 image_info.entry_point != FDT_ERROR)
609 spl_image->entry_point = image_info.entry_point;
611 /* Record our loadables into the FDT */
612 if (spl_image->fdt_addr)
613 spl_fit_record_loadable(fit, images, index,
619 * If a platform does not provide CONFIG_SYS_UBOOT_START, U-Boot's
620 * Makefile will set it to 0 and it will end up as the entry point
621 * here. What it actually means is: use the load address.
623 if (spl_image->entry_point == FDT_ERROR || spl_image->entry_point == 0)
624 spl_image->entry_point = spl_image->load_addr;
626 spl_image->flags |= SPL_FIT_FOUND;
628 #ifdef CONFIG_IMX_HAB
629 board_spl_fit_post_load((ulong)fit, size);