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https://github.com/AsahiLinux/u-boot
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aba6e77a30
This patch adds support for decompressing LZMA compressed u-boot payload in legacy uImage format. Using this patch together with u-boot-lzma.img may be useful for some platforms as they can reduce the size and load time of u-boot payload. Signed-off-by: Weijie Gao <weijie.gao@mediatek.com> Signed-off-by: Stefan Roese <sr@denx.de> Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Stefan Roese <sr@denx.de>
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*/
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#include <common.h>
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#include <malloc.h>
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#include <spl.h>
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#include <lzma/LzmaTypes.h>
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#include <lzma/LzmaDec.h>
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#include <lzma/LzmaTools.h>
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#define LZMA_LEN (1 << 20)
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int spl_parse_legacy_header(struct spl_image_info *spl_image,
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const struct image_header *header)
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{
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u32 header_size = sizeof(struct image_header);
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/* check uImage header CRC */
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if (IS_ENABLED(CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK) &&
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!image_check_hcrc(header)) {
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puts("SPL: Image header CRC check failed!\n");
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return -EINVAL;
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}
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if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
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/*
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* On some system (e.g. powerpc), the load-address and
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* entry-point is located at address 0. We can't load
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* to 0-0x40. So skip header in this case.
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*/
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spl_image->load_addr = image_get_load(header);
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spl_image->entry_point = image_get_ep(header);
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spl_image->size = image_get_data_size(header);
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} else {
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spl_image->entry_point = image_get_ep(header);
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/* Load including the header */
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spl_image->load_addr = image_get_load(header) -
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header_size;
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spl_image->size = image_get_data_size(header) +
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header_size;
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}
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#ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
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/* store uImage data length and CRC to check later */
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spl_image->dcrc_data = image_get_load(header);
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spl_image->dcrc_length = image_get_data_size(header);
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spl_image->dcrc = image_get_dcrc(header);
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#endif
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spl_image->os = image_get_os(header);
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spl_image->name = image_get_name(header);
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debug(SPL_TPL_PROMPT
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"payload image: %32s load addr: 0x%lx size: %d\n",
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spl_image->name, spl_image->load_addr, spl_image->size);
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return 0;
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}
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/*
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* This function is added explicitly to avoid code size increase, when
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* no compression method is enabled. The compiler will optimize the
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* following switch/case statement in spl_load_legacy_img() away due to
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* Dead Code Elimination.
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*/
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static inline int spl_image_get_comp(const struct image_header *hdr)
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{
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if (IS_ENABLED(CONFIG_SPL_LZMA))
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return image_get_comp(hdr);
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return IH_COMP_NONE;
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}
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int spl_load_legacy_img(struct spl_image_info *spl_image,
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struct spl_load_info *load, ulong header)
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{
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__maybe_unused SizeT lzma_len;
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__maybe_unused void *src;
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struct image_header hdr;
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ulong dataptr;
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int ret;
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/* Read header into local struct */
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load->read(load, header, sizeof(hdr), &hdr);
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ret = spl_parse_image_header(spl_image, &hdr);
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if (ret)
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return ret;
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dataptr = header + sizeof(hdr);
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/* Read image */
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switch (spl_image_get_comp(&hdr)) {
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case IH_COMP_NONE:
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load->read(load, dataptr, spl_image->size,
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(void *)(unsigned long)spl_image->load_addr);
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break;
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case IH_COMP_LZMA:
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lzma_len = LZMA_LEN;
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debug("LZMA: Decompressing %08lx to %08lx\n",
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dataptr, spl_image->load_addr);
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src = malloc(spl_image->size);
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if (!src) {
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printf("Unable to allocate %d bytes for LZMA\n",
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spl_image->size);
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return -ENOMEM;
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}
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load->read(load, dataptr, spl_image->size, src);
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ret = lzmaBuffToBuffDecompress((void *)spl_image->load_addr,
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&lzma_len, src, spl_image->size);
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if (ret) {
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printf("LZMA decompression error: %d\n", ret);
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return ret;
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}
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spl_image->size = lzma_len;
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break;
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default:
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debug("Compression method %s is not supported\n",
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genimg_get_comp_short_name(image_get_comp(&hdr)));
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return -EINVAL;
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}
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return 0;
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}
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