diff options
| -rw-r--r-- | common/spl/spl.c | 10 | ||||
| -rw-r--r-- | include/spl_load.h | 135 |
2 files changed, 145 insertions, 0 deletions
diff --git a/common/spl/spl.c b/common/spl/spl.c index 7ce38ce..3ce5bfe 100644 --- a/common/spl/spl.c +++ b/common/spl/spl.c @@ -19,6 +19,7 @@ #include <mapmem.h> #include <serial.h> #include <spl.h> +#include <spl_load.h> #include <system-constants.h> #include <asm/global_data.h> #include <asm-generic/gpio.h> @@ -352,6 +353,15 @@ int spl_parse_image_header(struct spl_image_info *spl_image, return 0; } +#if SPL_LOAD_USERS > 1 +int spl_load(struct spl_image_info *spl_image, + const struct spl_boot_device *bootdev, struct spl_load_info *info, + size_t size, size_t offset) +{ + return _spl_load(spl_image, bootdev, info, size, offset); +} +#endif + __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) { typedef void __noreturn (*image_entry_noargs_t)(void); diff --git a/include/spl_load.h b/include/spl_load.h new file mode 100644 index 0000000..406f8b5 --- /dev/null +++ b/include/spl_load.h @@ -0,0 +1,135 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) Sean Anderson <seanga2@gmail.com> + */ +#ifndef _SPL_LOAD_H_ +#define _SPL_LOAD_H_ + +#include <image.h> +#include <imx_container.h> +#include <mapmem.h> +#include <spl.h> + +static inline int _spl_load(struct spl_image_info *spl_image, + const struct spl_boot_device *bootdev, + struct spl_load_info *info, size_t size, + size_t offset) +{ + struct legacy_img_hdr *header = + spl_get_load_buffer(-sizeof(*header), sizeof(*header)); + ulong base_offset, image_offset, overhead; + int read, ret; + + read = info->read(info, offset, ALIGN(sizeof(*header), + spl_get_bl_len(info)), header); + if (read < sizeof(*header)) + return -EIO; + + if (image_get_magic(header) == FDT_MAGIC) { + if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL)) { + void *buf; + + /* + * In order to support verifying images in the FIT, we + * need to load the whole FIT into memory. Try and + * guess how much we need to load by using the total + * size. This will fail for FITs with external data, + * but there's not much we can do about that. + */ + if (!size) + size = round_up(fdt_totalsize(header), 4); + buf = map_sysmem(CONFIG_SYS_LOAD_ADDR, size); + read = info->read(info, offset, + ALIGN(size, spl_get_bl_len(info)), + buf); + if (read < size) + return -EIO; + + return spl_parse_image_header(spl_image, bootdev, buf); + } + + if (IS_ENABLED(CONFIG_SPL_LOAD_FIT)) + return spl_load_simple_fit(spl_image, info, offset, + header); + } + + if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER) && + valid_container_hdr((void *)header)) + return spl_load_imx_container(spl_image, info, offset); + + if (IS_ENABLED(CONFIG_SPL_LZMA) && + image_get_magic(header) == IH_MAGIC && + image_get_comp(header) == IH_COMP_LZMA) { + spl_image->flags |= SPL_COPY_PAYLOAD_ONLY; + ret = spl_parse_image_header(spl_image, bootdev, header); + if (ret) + return ret; + + return spl_load_legacy_lzma(spl_image, info, offset); + } + + ret = spl_parse_image_header(spl_image, bootdev, header); + if (ret) + return ret; + + base_offset = spl_image->offset; + /* Only NOR sets this flag. */ + if (IS_ENABLED(CONFIG_SPL_NOR_SUPPORT) && + spl_image->flags & SPL_COPY_PAYLOAD_ONLY) + base_offset += sizeof(*header); + image_offset = ALIGN_DOWN(base_offset, spl_get_bl_len(info)); + overhead = base_offset - image_offset; + size = ALIGN(spl_image->size + overhead, spl_get_bl_len(info)); + + read = info->read(info, offset + image_offset, size, + map_sysmem(spl_image->load_addr - overhead, size)); + return read < spl_image->size ? -EIO : 0; +} + +/* + * Although spl_load results in size reduction for callers, this is generally + * not enough to counteract the bloat if there is only one caller. The core + * problem is that the compiler can't optimize across translation units. The + * general solution to this is CONFIG_LTO, but that is not available on all + * architectures. Perform a pseudo-LTO just for this function by declaring it + * inline if there is one caller, and extern otherwise. + */ +#define SPL_LOAD_USERS \ + 0 + +#if SPL_LOAD_USERS > 1 +/** + * spl_load() - Parse a header and load the image + * @spl_image: Image data which will be filled in by this function + * @bootdev: The device to load from + * @info: Describes how to load additional information from @bootdev. At the + * minimum, read() and bl_len must be populated. + * @size: The size of the image, in bytes, if it is known in advance. Some boot + * devices (such as filesystems) know how big an image is before parsing + * the header. If 0, then the size will be determined from the header. + * @offset: The offset from the start of @bootdev, in bytes. This should have + * the offset @header was loaded from. It will be added to any offsets + * passed to @info->read(). + * + * This function determines the image type (FIT, legacy, i.MX, raw, etc), calls + * the appropriate parsing function, determines the load address, and the loads + * the image from storage. It is designed to replace ad-hoc image loading which + * may not support all image types (especially when config options are + * involved). + * + * Return: 0 on success, or a negative error on failure + */ +int spl_load(struct spl_image_info *spl_image, + const struct spl_boot_device *bootdev, struct spl_load_info *info, + size_t size, size_t offset); +#else +static inline int spl_load(struct spl_image_info *spl_image, + const struct spl_boot_device *bootdev, + struct spl_load_info *info, size_t size, + size_t offset) +{ + return _spl_load(spl_image, bootdev, info, size, offset); +} +#endif + +#endif /* _SPL_LOAD_H_ */ |