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https://github.com/brain-hackers/u-boot-brain
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04ce5427bd
The SPL loaders assume that the CONFIG_SYS_TEXT_BASE memory location is available and can be corrupted by loading ie. uImage or fitImage headers there. Sometimes it could be beneficial to load the headers elsewhere, ie. if CONFIG_SYS_TEXT_BASE is not yet writable while we still want to parse the image headers in some local onchip memory to ie. extract firmware from that image. Add the possibility to override the location where the headers get loaded by introducing new function, spl_get_load_buffer() which takes two arguments -- offset from the CONFIG_SYS_TEXT_BASE and size of the data that are to be loaded there -- and returns a valid buffer address or hangs the system. The default behavior is the same as before, add the offset to CONFIG_SYS_TEXT_BASE and return that address. User can override the weak spl_get_load_buffer() function though. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
145 lines
3.4 KiB
C
145 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <common.h>
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#include <spl.h>
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#include <asm/u-boot.h>
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#include <ext4fs.h>
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#include <errno.h>
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#include <image.h>
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int spl_load_image_ext(struct spl_image_info *spl_image,
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struct blk_desc *block_dev, int partition,
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const char *filename)
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{
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s32 err;
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struct image_header *header;
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loff_t filelen, actlen;
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disk_partition_t part_info = {};
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header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
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if (part_get_info(block_dev, partition, &part_info)) {
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printf("spl: no partition table found\n");
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return -1;
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}
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ext4fs_set_blk_dev(block_dev, &part_info);
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err = ext4fs_mount(0);
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if (!err) {
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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printf("%s: ext4fs mount err - %d\n", __func__, err);
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#endif
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goto end;
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}
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err = ext4fs_open(filename, &filelen);
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if (err < 0) {
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puts("spl: ext4fs_open failed\n");
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goto end;
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}
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err = ext4fs_read((char *)header, 0, sizeof(struct image_header), &actlen);
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if (err < 0) {
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puts("spl: ext4fs_read failed\n");
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goto end;
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}
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err = spl_parse_image_header(spl_image, header);
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if (err < 0) {
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puts("spl: ext: failed to parse image header\n");
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goto end;
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}
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err = ext4fs_read((char *)spl_image->load_addr, 0, filelen, &actlen);
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end:
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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if (err < 0)
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printf("%s: error reading image %s, err - %d\n",
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__func__, filename, err);
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#endif
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return err < 0;
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}
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#ifdef CONFIG_SPL_OS_BOOT
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int spl_load_image_ext_os(struct spl_image_info *spl_image,
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struct blk_desc *block_dev, int partition)
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{
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int err;
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__maybe_unused loff_t filelen, actlen;
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disk_partition_t part_info = {};
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__maybe_unused char *file;
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if (part_get_info(block_dev, partition, &part_info)) {
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printf("spl: no partition table found\n");
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return -1;
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}
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ext4fs_set_blk_dev(block_dev, &part_info);
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err = ext4fs_mount(0);
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if (!err) {
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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printf("%s: ext4fs mount err - %d\n", __func__, err);
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#endif
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return -1;
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}
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#if defined(CONFIG_SPL_ENV_SUPPORT)
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file = env_get("falcon_args_file");
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if (file) {
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err = ext4fs_open(file, &filelen);
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if (err < 0) {
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puts("spl: ext4fs_open failed\n");
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goto defaults;
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}
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err = ext4fs_read((void *)CONFIG_SYS_SPL_ARGS_ADDR, 0, filelen, &actlen);
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if (err < 0) {
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printf("spl: error reading image %s, err - %d, falling back to default\n",
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file, err);
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goto defaults;
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}
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file = env_get("falcon_image_file");
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if (file) {
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err = spl_load_image_ext(spl_image, block_dev,
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partition, file);
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if (err != 0) {
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puts("spl: falling back to default\n");
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goto defaults;
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}
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return 0;
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} else {
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puts("spl: falcon_image_file not set in environment, falling back to default\n");
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}
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} else {
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puts("spl: falcon_args_file not set in environment, falling back to default\n");
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}
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defaults:
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#endif
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err = ext4fs_open(CONFIG_SPL_FS_LOAD_ARGS_NAME, &filelen);
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if (err < 0)
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puts("spl: ext4fs_open failed\n");
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err = ext4fs_read((void *)CONFIG_SYS_SPL_ARGS_ADDR, 0, filelen, &actlen);
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if (err < 0) {
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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printf("%s: error reading image %s, err - %d\n",
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__func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err);
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#endif
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return -1;
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}
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return spl_load_image_ext(spl_image, block_dev, partition,
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CONFIG_SPL_FS_LOAD_KERNEL_NAME);
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}
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#else
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int spl_load_image_ext_os(struct spl_image_info *spl_image,
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struct blk_desc *block_dev, int partition)
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{
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return -ENOSYS;
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}
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#endif
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