// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2016 Google, Inc * Written by Simon Glass */ #include #include #include #include #include #include #ifndef CONFIG_SYS_BOOTM_LEN #define CONFIG_SYS_BOOTM_LEN (64 << 20) #endif __weak void board_spl_fit_post_load(ulong load_addr, size_t length) { } __weak ulong board_spl_fit_size_align(ulong size) { return size; } /** * spl_fit_get_image_name(): By using the matching configuration subnode, * retrieve the name of an image, specified by a property name and an index * into that. * @fit: Pointer to the FDT blob. * @images: Offset of the /images subnode. * @type: Name of the property within the configuration subnode. * @index: Index into the list of strings in this property. * @outname: Name of the image * * Return: 0 on success, or a negative error number */ static int spl_fit_get_image_name(const void *fit, int images, const char *type, int index, char **outname) { const char *name, *str; __maybe_unused int node; int conf_node; int len, i; conf_node = fit_find_config_node(fit); if (conf_node < 0) { #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT printf("No matching DT out of these options:\n"); for (node = fdt_first_subnode(fit, conf_node); node >= 0; node = fdt_next_subnode(fit, node)) { name = fdt_getprop(fit, node, "description", &len); printf(" %s\n", name); } #endif return conf_node; } name = fdt_getprop(fit, conf_node, type, &len); if (!name) { debug("cannot find property '%s': %d\n", type, len); return -EINVAL; } str = name; for (i = 0; i < index; i++) { str = strchr(str, '\0') + 1; if (!str || (str - name >= len)) { debug("no string for index %d\n", index); return -E2BIG; } } *outname = (char *)str; return 0; } /** * spl_fit_get_image_node(): By using the matching configuration subnode, * retrieve the name of an image, specified by a property name and an index * into that. * @fit: Pointer to the FDT blob. * @images: Offset of the /images subnode. * @type: Name of the property within the configuration subnode. * @index: Index into the list of strings in this property. * * Return: the node offset of the respective image node or a negative * error number. */ static int spl_fit_get_image_node(const void *fit, int images, const char *type, int index) { char *str; int err; int node; err = spl_fit_get_image_name(fit, images, type, index, &str); if (err) return err; debug("%s: '%s'\n", type, str); node = fdt_subnode_offset(fit, images, str); if (node < 0) { debug("cannot find image node '%s': %d\n", str, node); return -EINVAL; } return node; } static int get_aligned_image_offset(struct spl_load_info *info, int offset) { /* * If it is a FS read, get the first address before offset which is * aligned to ARCH_DMA_MINALIGN. If it is raw read return the * block number to which offset belongs. */ if (info->filename) return offset & ~(ARCH_DMA_MINALIGN - 1); return offset / info->bl_len; } static int get_aligned_image_overhead(struct spl_load_info *info, int offset) { /* * If it is a FS read, get the difference between the offset and * the first address before offset which is aligned to * ARCH_DMA_MINALIGN. If it is raw read return the offset within the * block. */ if (info->filename) return offset & (ARCH_DMA_MINALIGN - 1); return offset % info->bl_len; } static int get_aligned_image_size(struct spl_load_info *info, int data_size, int offset) { data_size = data_size + get_aligned_image_overhead(info, offset); if (info->filename) return data_size; return (data_size + info->bl_len - 1) / info->bl_len; } /** * spl_load_fit_image(): load the image described in a certain FIT node * @info: points to information about the device to load data from * @sector: the start sector of the FIT image on the device * @fit: points to the flattened device tree blob describing the FIT * image * @base_offset: the beginning of the data area containing the actual * image data, relative to the beginning of the FIT * @node: offset of the DT node describing the image to load (relative * to @fit) * @image_info: will be filled with information about the loaded image * If the FIT node does not contain a "load" (address) property, * the image gets loaded to the address pointed to by the * load_addr member in this struct. * * Return: 0 on success or a negative error number. */ static int spl_load_fit_image(struct spl_load_info *info, ulong sector, void *fit, ulong base_offset, int node, struct spl_image_info *image_info) { int offset; size_t length; int len; ulong size; ulong load_addr, load_ptr; void *src; ulong overhead; int nr_sectors; int align_len = ARCH_DMA_MINALIGN - 1; uint8_t image_comp = -1, type = -1; const void *data; bool external_data = false; if (IS_ENABLED(CONFIG_SPL_FPGA_SUPPORT) || (IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_GZIP))) { if (fit_image_get_type(fit, node, &type)) puts("Cannot get image type.\n"); else debug("%s ", genimg_get_type_name(type)); } if (IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_GZIP)) { if (fit_image_get_comp(fit, node, &image_comp)) puts("Cannot get image compression format.\n"); else debug("%s ", genimg_get_comp_name(image_comp)); } if (fit_image_get_load(fit, node, &load_addr)) load_addr = image_info->load_addr; if (!fit_image_get_data_position(fit, node, &offset)) { external_data = true; } else if (!fit_image_get_data_offset(fit, node, &offset)) { offset += base_offset; external_data = true; } if (external_data) { /* External data */ if (fit_image_get_data_size(fit, node, &len)) return -ENOENT; load_ptr = (load_addr + align_len) & ~align_len; length = len; overhead = get_aligned_image_overhead(info, offset); nr_sectors = get_aligned_image_size(info, length, offset); if (info->read(info, sector + get_aligned_image_offset(info, offset), nr_sectors, (void *)load_ptr) != nr_sectors) return -EIO; debug("External data: dst=%lx, offset=%x, size=%lx\n", load_ptr, offset, (unsigned long)length); src = (void *)load_ptr + overhead; } else { /* Embedded data */ if (fit_image_get_data(fit, node, &data, &length)) { puts("Cannot get image data/size\n"); return -ENOENT; } debug("Embedded data: dst=%lx, size=%lx\n", load_addr, (unsigned long)length); src = (void *)data; } #ifdef CONFIG_SPL_FIT_SIGNATURE printf("## Checking hash(es) for Image %s ... ", fit_get_name(fit, node, NULL)); if (!fit_image_verify_with_data(fit, node, src, length)) return -EPERM; puts("OK\n"); #endif #ifdef CONFIG_SPL_FIT_IMAGE_POST_PROCESS board_fit_image_post_process(&src, &length); #endif if (IS_ENABLED(CONFIG_SPL_GZIP) && image_comp == IH_COMP_GZIP) { size = length; if (gunzip((void *)load_addr, CONFIG_SYS_BOOTM_LEN, src, &size)) { puts("Uncompressing error\n"); return -EIO; } length = size; } else { memcpy((void *)load_addr, src, length); } if (image_info) { image_info->load_addr = load_addr; image_info->size = length; image_info->entry_point = fdt_getprop_u32(fit, node, "entry"); } return 0; } static int spl_fit_append_fdt(struct spl_image_info *spl_image, struct spl_load_info *info, ulong sector, void *fit, int images, ulong base_offset) { struct spl_image_info image_info; int node, ret; /* Figure out which device tree the board wants to use */ node = spl_fit_get_image_node(fit, images, FIT_FDT_PROP, 0); if (node < 0) { debug("%s: cannot find FDT node\n", __func__); return node; } /* * Read the device tree and place it after the image. * Align the destination address to ARCH_DMA_MINALIGN. */ image_info.load_addr = spl_image->load_addr + spl_image->size; ret = spl_load_fit_image(info, sector, fit, base_offset, node, &image_info); if (ret < 0) return ret; /* Make the load-address of the FDT available for the SPL framework */ spl_image->fdt_addr = (void *)image_info.load_addr; #if !CONFIG_IS_ENABLED(FIT_IMAGE_TINY) /* Try to make space, so we can inject details on the loadables */ ret = fdt_shrink_to_minimum(spl_image->fdt_addr, 8192); #endif return ret; } static int spl_fit_record_loadable(const void *fit, int images, int index, void *blob, struct spl_image_info *image) { int ret = 0; #if !CONFIG_IS_ENABLED(FIT_IMAGE_TINY) char *name; int node; ret = spl_fit_get_image_name(fit, images, "loadables", index, &name); if (ret < 0) return ret; node = spl_fit_get_image_node(fit, images, "loadables", index); ret = fdt_record_loadable(blob, index, name, image->load_addr, image->size, image->entry_point, fdt_getprop(fit, node, "type", NULL), fdt_getprop(fit, node, "os", NULL)); #endif return ret; } static int spl_fit_image_get_os(const void *fit, int noffset, uint8_t *os) { #if CONFIG_IS_ENABLED(FIT_IMAGE_TINY) return -ENOTSUPP; #else return fit_image_get_os(fit, noffset, os); #endif } /* * Weak default function to allow customizing SPL fit loading for load-only * use cases by allowing to skip the parsing/processing of the FIT contents * (so that this can be done separately in a more customized fashion) */ __weak bool spl_load_simple_fit_skip_processing(void) { return false; } int spl_load_simple_fit(struct spl_image_info *spl_image, struct spl_load_info *info, ulong sector, void *fit) { int sectors; ulong size; unsigned long count; struct spl_image_info image_info; int node = -1; int images, ret; int base_offset, hsize, align_len = ARCH_DMA_MINALIGN - 1; int index = 0; /* * For FIT with external data, figure out where the external images * start. This is the base for the data-offset properties in each * image. */ size = fdt_totalsize(fit); size = (size + 3) & ~3; size = board_spl_fit_size_align(size); base_offset = (size + 3) & ~3; /* * So far we only have one block of data from the FIT. Read the entire * thing, including that first block, placing it so it finishes before * where we will load the image. * * Note that we will load the image such that its first byte will be * at the load address. Since that byte may be part-way through a * block, we may load the image up to one block before the load * address. So take account of that here by subtracting an addition * block length from the FIT start position. * * In fact the FIT has its own load address, but we assume it cannot * be before CONFIG_SYS_TEXT_BASE. * * For FIT with data embedded, data is loaded as part of FIT image. * For FIT with external data, data is not loaded in this step. */ hsize = (size + info->bl_len + align_len) & ~align_len; fit = spl_get_load_buffer(-hsize, hsize); sectors = get_aligned_image_size(info, size, 0); count = info->read(info, sector, sectors, fit); debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu, size=0x%lx\n", sector, sectors, fit, count, size); if (count == 0) return -EIO; /* skip further processing if requested to enable load-only use cases */ if (spl_load_simple_fit_skip_processing()) return 0; /* find the node holding the images information */ images = fdt_path_offset(fit, FIT_IMAGES_PATH); if (images < 0) { debug("%s: Cannot find /images node: %d\n", __func__, images); return -1; } #ifdef CONFIG_SPL_FPGA_SUPPORT node = spl_fit_get_image_node(fit, images, "fpga", 0); if (node >= 0) { /* Load the image and set up the spl_image structure */ ret = spl_load_fit_image(info, sector, fit, base_offset, node, spl_image); if (ret) { printf("%s: Cannot load the FPGA: %i\n", __func__, ret); return ret; } debug("FPGA bitstream at: %x, size: %x\n", (u32)spl_image->load_addr, spl_image->size); ret = fpga_load(0, (const void *)spl_image->load_addr, spl_image->size, BIT_FULL); if (ret) { printf("%s: Cannot load the image to the FPGA\n", __func__); return ret; } puts("FPGA image loaded from FIT\n"); node = -1; } #endif /* * Find the U-Boot image using the following search order: * - start at 'firmware' (e.g. an ARM Trusted Firmware) * - fall back 'kernel' (e.g. a Falcon-mode OS boot * - fall back to using the first 'loadables' entry */ if (node < 0) node = spl_fit_get_image_node(fit, images, FIT_FIRMWARE_PROP, 0); #ifdef CONFIG_SPL_OS_BOOT if (node < 0) node = spl_fit_get_image_node(fit, images, FIT_KERNEL_PROP, 0); #endif if (node < 0) { debug("could not find firmware image, trying loadables...\n"); node = spl_fit_get_image_node(fit, images, "loadables", 0); /* * If we pick the U-Boot image from "loadables", start at * the second image when later loading additional images. */ index = 1; } if (node < 0) { debug("%s: Cannot find u-boot image node: %d\n", __func__, node); return -1; } /* Load the image and set up the spl_image structure */ ret = spl_load_fit_image(info, sector, fit, base_offset, node, spl_image); if (ret) return ret; /* * For backward compatibility, we treat the first node that is * as a U-Boot image, if no OS-type has been declared. */ if (!spl_fit_image_get_os(fit, node, &spl_image->os)) debug("Image OS is %s\n", genimg_get_os_name(spl_image->os)); #if !defined(CONFIG_SPL_OS_BOOT) else spl_image->os = IH_OS_U_BOOT; #endif /* * Booting a next-stage U-Boot may require us to append the FDT. * We allow this to fail, as the U-Boot image might embed its FDT. */ if (spl_image->os == IH_OS_U_BOOT) spl_fit_append_fdt(spl_image, info, sector, fit, images, base_offset); /* Now check if there are more images for us to load */ for (; ; index++) { uint8_t os_type = IH_OS_INVALID; node = spl_fit_get_image_node(fit, images, "loadables", index); if (node < 0) break; ret = spl_load_fit_image(info, sector, fit, base_offset, node, &image_info); if (ret < 0) continue; if (!spl_fit_image_get_os(fit, node, &os_type)) debug("Loadable is %s\n", genimg_get_os_name(os_type)); #if CONFIG_IS_ENABLED(FIT_IMAGE_TINY) else os_type = IH_OS_U_BOOT; #endif if (os_type == IH_OS_U_BOOT) { spl_fit_append_fdt(&image_info, info, sector, fit, images, base_offset); spl_image->fdt_addr = image_info.fdt_addr; } /* * If the "firmware" image did not provide an entry point, * use the first valid entry point from the loadables. */ if (spl_image->entry_point == FDT_ERROR && image_info.entry_point != FDT_ERROR) spl_image->entry_point = image_info.entry_point; /* Record our loadables into the FDT */ if (spl_image->fdt_addr) spl_fit_record_loadable(fit, images, index, spl_image->fdt_addr, &image_info); } /* * If a platform does not provide CONFIG_SYS_UBOOT_START, U-Boot's * Makefile will set it to 0 and it will end up as the entry point * here. What it actually means is: use the load address. */ if (spl_image->entry_point == FDT_ERROR || spl_image->entry_point == 0) spl_image->entry_point = spl_image->load_addr; spl_image->flags |= SPL_FIT_FOUND; #ifdef CONFIG_SECURE_BOOT board_spl_fit_post_load((ulong)fit, size); #endif return 0; }