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/* 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 \
IS_ENABLED(CONFIG_SPL_BLK_FS) + \
IS_ENABLED(CONFIG_SPL_FS_EXT4) + \
IS_ENABLED(CONFIG_SPL_FS_FAT) + \
IS_ENABLED(CONFIG_SPL_SYS_MMCSD_RAW_MODE) + \
(IS_ENABLED(CONFIG_SPL_NAND_SUPPORT) && !IS_ENABLED(CONFIG_SPL_UBI)) + \
IS_ENABLED(CONFIG_SPL_NET) + \
IS_ENABLED(CONFIG_SPL_NOR_SUPPORT) + \
IS_ENABLED(CONFIG_SPL_SEMIHOSTING) + \
IS_ENABLED(CONFIG_SPL_SPI_LOAD) + \
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_ */
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