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common/image-fdt.c
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/* * Copyright (c) 2013, Google Inc. * * (C) Copyright 2008 Semihalf * * (C) Copyright 2000-2006 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * |
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* Copyright (C) 2015-2016 Freescale Semiconductor, Inc. * |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ #include <common.h> #include <fdt_support.h> #include <errno.h> #include <image.h> |
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#include <linux/libfdt.h> |
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#include <mapmem.h> |
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#include <asm/io.h> #ifndef CONFIG_SYS_FDT_PAD #define CONFIG_SYS_FDT_PAD 0x3000 #endif DECLARE_GLOBAL_DATA_PTR; static void fdt_error(const char *msg) { puts("ERROR: "); puts(msg); puts(" - must RESET the board to recover. "); } |
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#if defined(CONFIG_IMAGE_FORMAT_LEGACY) |
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static const image_header_t *image_get_fdt(ulong fdt_addr) { const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0); image_print_contents(fdt_hdr); puts(" Verifying Checksum ... "); if (!image_check_hcrc(fdt_hdr)) { fdt_error("fdt header checksum invalid"); return NULL; } if (!image_check_dcrc(fdt_hdr)) { fdt_error("fdt checksum invalid"); return NULL; } puts("OK "); if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) { fdt_error("uImage is not a fdt"); return NULL; } if (image_get_comp(fdt_hdr) != IH_COMP_NONE) { fdt_error("uImage is compressed"); return NULL; } |
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if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) { |
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fdt_error("uImage data is not a fdt"); return NULL; } return fdt_hdr; } |
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#endif |
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/** * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable * @lmb: pointer to lmb handle, will be used for memory mgmt * @fdt_blob: pointer to fdt blob base address * * Adds the memreserve regions in the dtb to the lmb block. Adding the * memreserve regions prevents u-boot from using them to store the initrd * or the fdt blob. */ void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob) { uint64_t addr, size; int i, total; if (fdt_check_header(fdt_blob) != 0) return; total = fdt_num_mem_rsv(fdt_blob); for (i = 0; i < total; i++) { if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0) continue; printf(" reserving fdt memory region: addr=%llx size=%llx ", (unsigned long long)addr, (unsigned long long)size); lmb_reserve(lmb, addr, size); } } /** * boot_relocate_fdt - relocate flat device tree * @lmb: pointer to lmb handle, will be used for memory mgmt * @of_flat_tree: pointer to a char* variable, will hold fdt start address * @of_size: pointer to a ulong variable, will hold fdt length * * boot_relocate_fdt() allocates a region of memory within the bootmap and * relocates the of_flat_tree into that region, even if the fdt is already in * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD * bytes. * * of_flat_tree and of_size are set to final (after relocation) values * * returns: * 0 - success * 1 - failure */ int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size) { void *fdt_blob = *of_flat_tree; void *of_start = NULL; char *fdt_high; ulong of_len = 0; int err; int disable_relocation = 0; /* nothing to do */ if (*of_size == 0) return 0; if (fdt_check_header(fdt_blob) != 0) { fdt_error("image is not a fdt"); goto error; } /* position on a 4K boundary before the alloc_current */ /* Pad the FDT by a specified amount */ of_len = *of_size + CONFIG_SYS_FDT_PAD; /* If fdt_high is set use it to select the relocation address */ |
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fdt_high = env_get("fdt_high"); |
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if (fdt_high) { void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16); if (((ulong) desired_addr) == ~0UL) { /* All ones means use fdt in place */ of_start = fdt_blob; lmb_reserve(lmb, (ulong)of_start, of_len); disable_relocation = 1; } else if (desired_addr) { of_start = (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000, (ulong)desired_addr); if (of_start == NULL) { puts("Failed using fdt_high value for Device Tree"); goto error; } } else { of_start = (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000); } } else { of_start = (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000, |
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env_get_bootm_mapsize() + env_get_bootm_low()); |
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} if (of_start == NULL) { puts("device tree - allocation error "); goto error; } if (disable_relocation) { /* * We assume there is space after the existing fdt to use * for padding */ fdt_set_totalsize(of_start, of_len); printf(" Using Device Tree in place at %p, end %p ", of_start, of_start + of_len - 1); } else { debug("## device tree at %p ... %p (len=%ld [0x%lX]) ", fdt_blob, fdt_blob + *of_size - 1, of_len, of_len); printf(" Loading Device Tree to %p, end %p ... ", of_start, of_start + of_len - 1); err = fdt_open_into(fdt_blob, of_start, of_len); if (err != 0) { fdt_error("fdt move failed"); goto error; } puts("OK "); } *of_flat_tree = of_start; *of_size = of_len; |
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set_working_fdt_addr((ulong)*of_flat_tree); |
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return 0; error: return 1; } |
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/** * boot_get_fdt - main fdt handling routine * @argc: command argument count * @argv: command argument list |
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* @arch: architecture (IH_ARCH_...) |
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* @images: pointer to the bootm images structure * @of_flat_tree: pointer to a char* variable, will hold fdt start address * @of_size: pointer to a ulong variable, will hold fdt length * * boot_get_fdt() is responsible for finding a valid flat device tree image. * Curently supported are the following ramdisk sources: * - multicomponent kernel/ramdisk image, * - commandline provided address of decicated ramdisk image. * * returns: * 0, if fdt image was found and valid, or skipped * of_flat_tree and of_size are set to fdt start address and length if * fdt image is found and valid * * 1, if fdt image is found but corrupted * of_flat_tree and of_size are set to 0 if no fdt exists */ |
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int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch, |
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bootm_headers_t *images, char **of_flat_tree, ulong *of_size) { |
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#if defined(CONFIG_IMAGE_FORMAT_LEGACY) |
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const image_header_t *fdt_hdr; |
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ulong load, load_end; ulong image_start, image_data, image_end; #endif |
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ulong fdt_addr; char *fdt_blob = NULL; |
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void *buf; |
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#if CONFIG_IS_ENABLED(FIT) |
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const char *fit_uname_config = images->fit_uname_cfg; |
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const char *fit_uname_fdt = NULL; ulong default_addr; |
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int fdt_noffset; |
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#endif |
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const char *select = NULL; |
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int ok_no_fdt = 0; |
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*of_flat_tree = NULL; *of_size = 0; |
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if (argc > 2) select = argv[2]; if (select || genimg_has_config(images)) { |
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#if CONFIG_IS_ENABLED(FIT) |
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if (select) { |
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/* * If the FDT blob comes from the FIT image and the * FIT image address is omitted in the command line * argument, try to use ramdisk or os FIT image * address or default load address. */ if (images->fit_uname_rd) default_addr = (ulong)images->fit_hdr_rd; else if (images->fit_uname_os) default_addr = (ulong)images->fit_hdr_os; else default_addr = load_addr; |
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if (fit_parse_conf(select, default_addr, |
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&fdt_addr, &fit_uname_config)) { debug("* fdt: config '%s' from image at 0x%08lx ", fit_uname_config, fdt_addr); |
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} else if (fit_parse_subimage(select, default_addr, |
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&fdt_addr, &fit_uname_fdt)) { debug("* fdt: subimage '%s' from image at 0x%08lx ", fit_uname_fdt, fdt_addr); } else #endif { |
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fdt_addr = simple_strtoul(select, NULL, 16); |
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debug("* fdt: cmdline image address = 0x%08lx ", fdt_addr); } |
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#if CONFIG_IS_ENABLED(FIT) |
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} else { /* use FIT configuration provided in first bootm * command argument */ fdt_addr = map_to_sysmem(images->fit_hdr_os); |
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fdt_noffset = fit_get_node_from_config(images, FIT_FDT_PROP, fdt_addr); |
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if (fdt_noffset == -ENOENT) |
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return 0; |
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else if (fdt_noffset < 0) return 1; |
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} #endif |
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debug("## Checking for 'FDT'/'FDT Image' at %08lx ", fdt_addr); |
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/* * Check if there is an FDT image at the * address provided in the second bootm argument * check image type, for FIT images get a FIT node. */ buf = map_sysmem(fdt_addr, 0); switch (genimg_get_format(buf)) { |
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#if defined(CONFIG_IMAGE_FORMAT_LEGACY) |
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case IMAGE_FORMAT_LEGACY: /* verify fdt_addr points to a valid image header */ printf("## Flattened Device Tree from Legacy Image at %08lx ", fdt_addr); fdt_hdr = image_get_fdt(fdt_addr); if (!fdt_hdr) |
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goto no_fdt; |
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/* * move image data to the load address, * make sure we don't overwrite initial image */ image_start = (ulong)fdt_hdr; image_data = (ulong)image_get_data(fdt_hdr); image_end = image_get_image_end(fdt_hdr); |
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load = image_get_load(fdt_hdr); load_end = load + image_get_data_size(fdt_hdr); |
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|
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if (load == image_start || load == image_data) { |
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fdt_addr = load; |
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break; } |
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if ((load < image_end) && (load_end > image_start)) { |
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fdt_error("fdt overwritten"); goto error; } debug(" Loading FDT from 0x%08lx to 0x%08lx ", |
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image_data, load); |
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|
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memmove((void *)load, |
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(void *)image_data, image_get_data_size(fdt_hdr)); |
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fdt_addr = load; |
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break; |
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#endif |
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case IMAGE_FORMAT_FIT: /* * This case will catch both: new uImage format * (libfdt based) and raw FDT blob (also libfdt * based). */ |
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#if CONFIG_IS_ENABLED(FIT) |
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/* check FDT blob vs FIT blob */ if (fit_check_format(buf)) { |
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ulong load, len; |
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|
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fdt_noffset = boot_get_fdt_fit(images, |
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fdt_addr, &fit_uname_fdt, |
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&fit_uname_config, |
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arch, &load, &len); |
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|
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images->fit_hdr_fdt = map_sysmem(fdt_addr, 0); |
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images->fit_uname_fdt = fit_uname_fdt; images->fit_noffset_fdt = fdt_noffset; |
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fdt_addr = load; |
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|
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break; } else #endif { /* * FDT blob */ |
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debug("* fdt: raw FDT blob "); printf("## Flattened Device Tree blob at %08lx ", (long)fdt_addr); } break; default: puts("ERROR: Did not find a cmdline Flattened Device Tree "); |
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goto no_fdt; |
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} |
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printf(" Booting using the fdt blob at %#08lx ", fdt_addr); fdt_blob = map_sysmem(fdt_addr, 0); |
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} else if (images->legacy_hdr_valid && image_check_type(&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) { ulong fdt_data, fdt_len; /* * Now check if we have a legacy multi-component image, * get second entry data start address and len. */ printf("## Flattened Device Tree from multi component Image at %08lX ", (ulong)images->legacy_hdr_os); image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data, &fdt_len); if (fdt_len) { fdt_blob = (char *)fdt_data; printf(" Booting using the fdt at 0x%p ", fdt_blob); if (fdt_check_header(fdt_blob) != 0) { fdt_error("image is not a fdt"); goto error; } if (fdt_totalsize(fdt_blob) != fdt_len) { fdt_error("fdt size != image size"); goto error; } } else { debug("## No Flattened Device Tree "); |
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goto no_fdt; |
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} |
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} #ifdef CONFIG_ANDROID_BOOT_IMAGE else if (genimg_get_format((void *)images->os.start) == IMAGE_FORMAT_ANDROID) { ulong fdt_data, fdt_len; android_image_get_second((void *)images->os.start, &fdt_data, &fdt_len); if (fdt_len) { fdt_blob = (char *)fdt_data; printf(" Booting using the fdt at 0x%p ", fdt_blob); if (fdt_check_header(fdt_blob) != 0) { fdt_error("image is not a fdt"); goto error; } if (fdt_totalsize(fdt_blob) != fdt_len) { fdt_error("fdt size != image size"); goto error; } } else { debug("## No Flattened Device Tree "); goto no_fdt; } } #endif else { |
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debug("## No Flattened Device Tree "); |
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goto no_fdt; |
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} *of_flat_tree = fdt_blob; *of_size = fdt_totalsize(fdt_blob); debug(" of_flat_tree at 0x%08lx size 0x%08lx ", (ulong)*of_flat_tree, *of_size); return 0; |
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no_fdt: ok_no_fdt = 1; |
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error: *of_flat_tree = NULL; *of_size = 0; |
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if (!select && ok_no_fdt) { debug("Continuing to boot without FDT "); return 0; } |
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return 1; } |
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/* * Verify the device tree. * * This function is called after all device tree fix-ups have been enacted, * so that the final device tree can be verified. The definition of "verified" * is up to the specific implementation. However, it generally means that the * addresses of some of the devices in the device tree are compared with the * actual addresses at which U-Boot has placed them. * |
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* Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the |
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* boot process. */ __weak int ft_verify_fdt(void *fdt) { return 1; } |
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__weak int arch_fixup_fdt(void *blob) { return 0; } |
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int image_setup_libfdt(bootm_headers_t *images, void *blob, int of_size, struct lmb *lmb) { ulong *initrd_start = &images->initrd_start; ulong *initrd_end = &images->initrd_end; |
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int ret = -EPERM; int fdt_ret; |
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|
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if (fdt_root(blob) < 0) { printf("ERROR: root node setup failed "); goto err; } |
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if (fdt_chosen(blob) < 0) { |
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printf("ERROR: /chosen node create failed "); goto err; |
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} |
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if (arch_fixup_fdt(blob) < 0) { |
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printf("ERROR: arch-specific fdt fixup failed "); goto err; } |
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/* Update ethernet nodes */ fdt_fixup_ethernet(blob); |
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if (IMAGE_OF_BOARD_SETUP) { fdt_ret = ft_board_setup(blob, gd->bd); if (fdt_ret) { printf("ERROR: board-specific fdt fixup failed: %s ", fdt_strerror(fdt_ret)); goto err; } |
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} |
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if (IMAGE_OF_SYSTEM_SETUP) { |
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fdt_ret = ft_system_setup(blob, gd->bd); if (fdt_ret) { |
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printf("ERROR: system-specific fdt fixup failed: %s ", fdt_strerror(fdt_ret)); goto err; } } |
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/* Delete the old LMB reservation */ |
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if (lmb) lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob, (phys_size_t)fdt_totalsize(blob)); |
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|
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ret = fdt_shrink_to_minimum(blob, 0); |
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if (ret < 0) |
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goto err; |
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of_size = ret; if (*initrd_start && *initrd_end) { of_size += FDT_RAMDISK_OVERHEAD; fdt_set_totalsize(blob, of_size); } /* Create a new LMB reservation */ |
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if (lmb) lmb_reserve(lmb, (ulong)blob, of_size); |
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|
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fdt_initrd(blob, *initrd_start, *initrd_end); |
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if (!ft_verify_fdt(blob)) |
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goto err; |
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|
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#if defined(CONFIG_SOC_KEYSTONE) |
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if (IMAGE_OF_BOARD_SETUP) ft_board_setup_ex(blob, gd->bd); #endif |
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return 0; |
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err: printf(" - must RESET the board to recover. "); return ret; |
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580 |
} |