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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2016 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #include <common.h>
- #include <errno.h>
- #include <fpga.h>
- #include <gzip.h>
- #include <image.h>
- #include <log.h>
- #include <malloc.h>
- #include <mapmem.h>
- #include <spl.h>
- #include <sysinfo.h>
- #include <asm/cache.h>
- #include <asm/global_data.h>
- #include <linux/libfdt.h>
- DECLARE_GLOBAL_DATA_PTR;
- #ifndef CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
- #define CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ (64 * 1024)
- #endif
- #ifndef CONFIG_SYS_BOOTM_LEN
- #define CONFIG_SYS_BOOTM_LEN (64 << 20)
- #endif
- struct spl_fit_info {
- const void *fit; /* Pointer to a valid FIT blob */
- size_t ext_data_offset; /* Offset to FIT external data (end of FIT) */
- int images_node; /* FDT offset to "/images" node */
- int conf_node; /* FDT offset to selected configuration node */
- };
- __weak void board_spl_fit_post_load(const void *fit)
- {
- }
- __weak ulong board_spl_fit_size_align(ulong size)
- {
- return size;
- }
- static int find_node_from_desc(const void *fit, int node, const char *str)
- {
- int child;
- if (node < 0)
- return -EINVAL;
- /* iterate the FIT nodes and find a matching description */
- for (child = fdt_first_subnode(fit, node); child >= 0;
- child = fdt_next_subnode(fit, child)) {
- int len;
- const char *desc = fdt_getprop(fit, child, "description", &len);
- if (!desc)
- continue;
- if (!strcmp(desc, str))
- return child;
- }
- return -ENOENT;
- }
- /**
- * 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 struct spl_fit_info *ctx,
- const char *type, int index,
- const char **outname)
- {
- struct udevice *sysinfo;
- const char *name, *str;
- __maybe_unused int node;
- int len, i;
- bool found = true;
- name = fdt_getprop(ctx->fit, ctx->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)) {
- found = false;
- break;
- }
- }
- if (!found && CONFIG_IS_ENABLED(SYSINFO) && !sysinfo_get(&sysinfo)) {
- int rc;
- /*
- * no string in the property for this index. Check if the
- * sysinfo-level code can supply one.
- */
- rc = sysinfo_detect(sysinfo);
- if (rc)
- return rc;
- rc = sysinfo_get_fit_loadable(sysinfo, index - i - 1, type,
- &str);
- if (rc && rc != -ENOENT)
- return rc;
- if (!rc) {
- /*
- * The sysinfo provided a name for a loadable.
- * Try to match it against the description properties
- * first. If no matching node is found, use it as a
- * node name.
- */
- int node;
- int images = fdt_path_offset(ctx->fit, FIT_IMAGES_PATH);
- node = find_node_from_desc(ctx->fit, images, str);
- if (node > 0)
- str = fdt_get_name(ctx->fit, node, NULL);
- found = true;
- }
- }
- if (!found) {
- debug("no string for index %d\n", index);
- return -E2BIG;
- }
- *outname = 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 struct spl_fit_info *ctx,
- const char *type, int index)
- {
- const char *str;
- int err;
- int node;
- err = spl_fit_get_image_name(ctx, type, index, &str);
- if (err)
- return err;
- debug("%s: '%s'\n", type, str);
- node = fdt_subnode_offset(ctx->fit, ctx->images_node, str);
- if (node < 0) {
- pr_err("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
- * @ctx: points to the FIT context structure
- * @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, if load_addr is not 0
- *
- * Return: 0 on success or a negative error number.
- */
- static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
- const struct spl_fit_info *ctx, int node,
- struct spl_image_info *image_info)
- {
- int offset;
- size_t length;
- int len;
- ulong size;
- ulong load_addr;
- void *load_ptr;
- void *src;
- ulong overhead;
- int nr_sectors;
- uint8_t image_comp = -1, type = -1;
- const void *data;
- const void *fit = ctx->fit;
- bool external_data = false;
- if (IS_ENABLED(CONFIG_SPL_FPGA) ||
- (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_GZIP)) {
- fit_image_get_comp(fit, node, &image_comp);
- debug("%s ", genimg_get_comp_name(image_comp));
- }
- if (fit_image_get_load(fit, node, &load_addr)) {
- if (!image_info->load_addr) {
- printf("Can't load %s: No load address and no buffer\n",
- fit_get_name(fit, node, NULL));
- return -ENOBUFS;
- }
- 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 += ctx->ext_data_offset;
- external_data = true;
- }
- if (external_data) {
- void *src_ptr;
- /* External data */
- if (fit_image_get_data_size(fit, node, &len))
- return -ENOENT;
- src_ptr = map_sysmem(ALIGN(load_addr, ARCH_DMA_MINALIGN), 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, src_ptr) != nr_sectors)
- return -EIO;
- debug("External data: dst=%p, offset=%x, size=%lx\n",
- src_ptr, offset, (unsigned long)length);
- src = src_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; /* cast away const */
- }
- if (CONFIG_IS_ENABLED(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");
- }
- if (CONFIG_IS_ENABLED(FIT_IMAGE_POST_PROCESS))
- board_fit_image_post_process(fit, node, &src, &length);
- load_ptr = map_sysmem(load_addr, length);
- if (IS_ENABLED(CONFIG_SPL_GZIP) && image_comp == IH_COMP_GZIP) {
- size = length;
- if (gunzip(load_ptr, CONFIG_SYS_BOOTM_LEN, src, &size)) {
- puts("Uncompressing error\n");
- return -EIO;
- }
- length = size;
- } else {
- memcpy(load_ptr, src, length);
- }
- if (image_info) {
- ulong entry_point;
- image_info->load_addr = load_addr;
- image_info->size = length;
- if (!fit_image_get_entry(fit, node, &entry_point))
- image_info->entry_point = entry_point;
- else
- image_info->entry_point = FDT_ERROR;
- }
- return 0;
- }
- static bool os_takes_devicetree(uint8_t os)
- {
- switch (os) {
- case IH_OS_U_BOOT:
- return true;
- case IH_OS_LINUX:
- return IS_ENABLED(CONFIG_SPL_OS_BOOT);
- default:
- return false;
- }
- }
- static int spl_fit_append_fdt(struct spl_image_info *spl_image,
- struct spl_load_info *info, ulong sector,
- const struct spl_fit_info *ctx)
- {
- struct spl_image_info image_info;
- int node, ret = 0, index = 0;
- /*
- * Use the address following the image as target address for the
- * device tree.
- */
- image_info.load_addr = spl_image->load_addr + spl_image->size;
- /* Figure out which device tree the board wants to use */
- node = spl_fit_get_image_node(ctx, FIT_FDT_PROP, index++);
- if (node < 0) {
- debug("%s: cannot find FDT node\n", __func__);
- /*
- * U-Boot did not find a device tree inside the FIT image. Use
- * the U-Boot device tree instead.
- */
- if (gd->fdt_blob)
- memcpy((void *)image_info.load_addr, gd->fdt_blob,
- fdt_totalsize(gd->fdt_blob));
- else
- return node;
- } else {
- ret = spl_load_fit_image(info, sector, ctx, node,
- &image_info);
- if (ret < 0)
- return ret;
- }
- /* Make the load-address of the FDT available for the SPL framework */
- spl_image->fdt_addr = map_sysmem(image_info.load_addr, 0);
- if (CONFIG_IS_ENABLED(FIT_IMAGE_TINY))
- return 0;
- if (CONFIG_IS_ENABLED(LOAD_FIT_APPLY_OVERLAY)) {
- void *tmpbuffer = NULL;
- for (; ; index++) {
- node = spl_fit_get_image_node(ctx, FIT_FDT_PROP, index);
- if (node == -E2BIG) {
- debug("%s: No additional FDT node\n", __func__);
- break;
- } else if (node < 0) {
- debug("%s: unable to find FDT node %d\n",
- __func__, index);
- continue;
- }
- if (!tmpbuffer) {
- /*
- * allocate memory to store the DT overlay
- * before it is applied. It may not be used
- * depending on how the overlay is stored, so
- * don't fail yet if the allocation failed.
- */
- tmpbuffer = malloc(CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ);
- if (!tmpbuffer)
- debug("%s: unable to allocate space for overlays\n",
- __func__);
- }
- image_info.load_addr = (ulong)tmpbuffer;
- ret = spl_load_fit_image(info, sector, ctx,
- node, &image_info);
- if (ret < 0)
- break;
- /* Make room in FDT for changes from the overlay */
- ret = fdt_increase_size(spl_image->fdt_addr,
- image_info.size);
- if (ret < 0)
- break;
- ret = fdt_overlay_apply_verbose(spl_image->fdt_addr,
- (void *)image_info.load_addr);
- if (ret) {
- pr_err("failed to apply DT overlay %s\n",
- fit_get_name(ctx->fit, node, NULL));
- break;
- }
- debug("%s: DT overlay %s applied\n", __func__,
- fit_get_name(ctx->fit, node, NULL));
- }
- free(tmpbuffer);
- if (ret)
- return ret;
- }
- /* Try to make space, so we can inject details on the loadables */
- ret = fdt_shrink_to_minimum(spl_image->fdt_addr, 8192);
- if (ret < 0)
- return ret;
- return ret;
- }
- static int spl_fit_record_loadable(const struct spl_fit_info *ctx, int index,
- void *blob, struct spl_image_info *image)
- {
- int ret = 0;
- const char *name;
- int node;
- if (CONFIG_IS_ENABLED(FIT_IMAGE_TINY))
- return 0;
- ret = spl_fit_get_image_name(ctx, "loadables", index, &name);
- if (ret < 0)
- return ret;
- node = spl_fit_get_image_node(ctx, "loadables", index);
- ret = fdt_record_loadable(blob, index, name, image->load_addr,
- image->size, image->entry_point,
- fdt_getprop(ctx->fit, node, "type", NULL),
- fdt_getprop(ctx->fit, node, "os", NULL),
- fdt_getprop(ctx->fit, node, "arch", NULL));
- return ret;
- }
- static int spl_fit_image_is_fpga(const void *fit, int node)
- {
- const char *type;
- if (!IS_ENABLED(CONFIG_SPL_FPGA))
- return 0;
- type = fdt_getprop(fit, node, FIT_TYPE_PROP, NULL);
- if (!type)
- return 0;
- return !strcmp(type, "fpga");
- }
- static int spl_fit_image_get_os(const void *fit, int noffset, uint8_t *os)
- {
- if (!CONFIG_IS_ENABLED(FIT_IMAGE_TINY) || CONFIG_IS_ENABLED(OS_BOOT))
- return fit_image_get_os(fit, noffset, os);
- const char *name = fdt_getprop(fit, noffset, FIT_OS_PROP, NULL);
- if (!name)
- return -ENOENT;
- /*
- * We don't care what the type of the image actually is,
- * only whether or not it is U-Boot. This saves some
- * space by omitting the large table of OS types.
- */
- if (!strcmp(name, "u-boot"))
- *os = IH_OS_U_BOOT;
- else
- *os = IH_OS_INVALID;
- return 0;
- }
- /*
- * The purpose of the FIT load buffer is to provide a memory location that is
- * independent of the load address of any FIT component.
- */
- static void *spl_get_fit_load_buffer(size_t size)
- {
- void *buf;
- buf = malloc(size);
- if (!buf) {
- pr_err("Could not get FIT buffer of %lu bytes\n", (ulong)size);
- pr_err("\tcheck CONFIG_SYS_SPL_MALLOC_SIZE\n");
- buf = spl_get_load_buffer(0, size);
- }
- return buf;
- }
- /*
- * 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;
- }
- static void warn_deprecated(const char *msg)
- {
- printf("DEPRECATED: %s\n", msg);
- printf("\tSee doc/uImage.FIT/source_file_format.txt\n");
- }
- static int spl_fit_upload_fpga(struct spl_fit_info *ctx, int node,
- struct spl_image_info *fpga_image)
- {
- const char *compatible;
- int ret;
- debug("FPGA bitstream at: %x, size: %x\n",
- (u32)fpga_image->load_addr, fpga_image->size);
- compatible = fdt_getprop(ctx->fit, node, "compatible", NULL);
- if (!compatible)
- warn_deprecated("'fpga' image without 'compatible' property");
- else if (strcmp(compatible, "u-boot,fpga-legacy"))
- printf("Ignoring compatible = %s property\n", compatible);
- ret = fpga_load(0, (void *)fpga_image->load_addr, fpga_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");
- return 0;
- }
- static int spl_fit_load_fpga(struct spl_fit_info *ctx,
- struct spl_load_info *info, ulong sector)
- {
- int node, ret;
- struct spl_image_info fpga_image = {
- .load_addr = 0,
- };
- node = spl_fit_get_image_node(ctx, "fpga", 0);
- if (node < 0)
- return node;
- warn_deprecated("'fpga' property in config node. Use 'loadables'");
- /* Load the image and set up the fpga_image structure */
- ret = spl_load_fit_image(info, sector, ctx, node, &fpga_image);
- if (ret) {
- printf("%s: Cannot load the FPGA: %i\n", __func__, ret);
- return ret;
- }
- return spl_fit_upload_fpga(ctx, node, &fpga_image);
- }
- static int spl_simple_fit_read(struct spl_fit_info *ctx,
- struct spl_load_info *info, ulong sector,
- const void *fit_header)
- {
- unsigned long count, size;
- int sectors;
- void *buf;
- /*
- * 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 = ALIGN(fdt_totalsize(fit_header), 4);
- size = board_spl_fit_size_align(size);
- ctx->ext_data_offset = ALIGN(size, 4);
- /*
- * So far we only have one block of data from the FIT. Read the entire
- * thing, including that first block.
- *
- * 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.
- */
- sectors = get_aligned_image_size(info, size, 0);
- buf = spl_get_fit_load_buffer(sectors * info->bl_len);
- count = info->read(info, sector, sectors, buf);
- ctx->fit = buf;
- debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu, size=0x%lx\n",
- sector, sectors, buf, count, size);
- return (count == 0) ? -EIO : 0;
- }
- static int spl_simple_fit_parse(struct spl_fit_info *ctx)
- {
- /* Find the correct subnode under "/configurations" */
- ctx->conf_node = fit_find_config_node(ctx->fit);
- if (ctx->conf_node < 0)
- return -EINVAL;
- if (IS_ENABLED(CONFIG_SPL_FIT_SIGNATURE)) {
- printf("## Checking hash(es) for config %s ... ",
- fit_get_name(ctx->fit, ctx->conf_node, NULL));
- if (fit_config_verify(ctx->fit, ctx->conf_node))
- return -EPERM;
- puts("OK\n");
- }
- /* find the node holding the images information */
- ctx->images_node = fdt_path_offset(ctx->fit, FIT_IMAGES_PATH);
- if (ctx->images_node < 0) {
- debug("%s: Cannot find /images node: %d\n", __func__,
- ctx->images_node);
- return -EINVAL;
- }
- return 0;
- }
- int spl_load_simple_fit(struct spl_image_info *spl_image,
- struct spl_load_info *info, ulong sector, void *fit)
- {
- struct spl_image_info image_info;
- struct spl_fit_info ctx;
- int node = -1;
- int ret;
- int index = 0;
- int firmware_node;
- ret = spl_simple_fit_read(&ctx, info, sector, fit);
- if (ret < 0)
- return ret;
- /* skip further processing if requested to enable load-only use cases */
- if (spl_load_simple_fit_skip_processing())
- return 0;
- ret = spl_simple_fit_parse(&ctx);
- if (ret < 0)
- return ret;
- if (IS_ENABLED(CONFIG_SPL_FPGA))
- spl_fit_load_fpga(&ctx, info, sector);
- /*
- * 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(&ctx, FIT_FIRMWARE_PROP, 0);
- if (node < 0 && IS_ENABLED(CONFIG_SPL_OS_BOOT))
- node = spl_fit_get_image_node(&ctx, FIT_KERNEL_PROP, 0);
- if (node < 0) {
- debug("could not find firmware image, trying loadables...\n");
- node = spl_fit_get_image_node(&ctx, "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, &ctx, 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(ctx.fit, node, &spl_image->os))
- debug("Image OS is %s\n", genimg_get_os_name(spl_image->os));
- else if (!IS_ENABLED(CONFIG_SPL_OS_BOOT))
- spl_image->os = IH_OS_U_BOOT;
- /*
- * 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 (os_takes_devicetree(spl_image->os)) {
- ret = spl_fit_append_fdt(spl_image, info, sector, &ctx);
- if (ret < 0 && spl_image->os != IH_OS_U_BOOT)
- return ret;
- }
- firmware_node = node;
- /* 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(&ctx, "loadables", index);
- if (node < 0)
- break;
- /*
- * if the firmware is also a loadable, skip it because
- * it already has been loaded. This is typically the case with
- * u-boot.img generated by mkimage.
- */
- if (firmware_node == node)
- continue;
- image_info.load_addr = 0;
- ret = spl_load_fit_image(info, sector, &ctx, node, &image_info);
- if (ret < 0) {
- printf("%s: can't load image loadables index %d (ret = %d)\n",
- __func__, index, ret);
- return ret;
- }
- if (spl_fit_image_is_fpga(ctx.fit, node))
- spl_fit_upload_fpga(&ctx, node, &image_info);
- if (!spl_fit_image_get_os(ctx.fit, node, &os_type))
- debug("Loadable is %s\n", genimg_get_os_name(os_type));
- if (os_takes_devicetree(os_type)) {
- spl_fit_append_fdt(&image_info, info, sector, &ctx);
- 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(&ctx, 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;
- if (IS_ENABLED(CONFIG_IMX_HAB))
- board_spl_fit_post_load(ctx.fit);
- return 0;
- }
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