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https://github.com/brain-hackers/u-boot-brain
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![Stephen Warren](/assets/img/avatar_default.png)
The legacy uImage format includes an absolute load and entry-point address. When bootm operates on a kernel uImage in memory that isn't loaded at the address in the image's load address, U-Boot will copy the image to its address in the header. Some kernel images can actually be loaded and used at any arbitrary address. An example is an ARM Linux kernel zImage file. To represent this capability, IH_TYPE_KERNEL_NOLOAD is implemented, which operates just like IH_TYPE_KERNEL, except that the load address header is ignored, and U-Boot does not copy the image to its load address, but rather uses it in-place. This is useful when sharing a single (uImage-wrapped) zImage across multiple boards with different memory layouts; in this case, a specific load address need not be picked when creating the uImage, but instead is selected by the board-specific U-Boot environment used to load and boot that image. v2: Rename from IH_TYPE_KERNEL_ANYLOAD to IH_TYPE_KERNEL_NOLOAD. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Stefan Roese <sr@denx.de>
151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/*
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* (C) Copyright 2008 Semihalf
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*
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* (C) Copyright 2000-2004
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* DENX Software Engineering
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* Wolfgang Denk, wd@denx.de
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*
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* Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
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* default_image specific code abstracted from mkimage.c
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* some functions added to address abstraction
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include "mkimage.h"
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#include <image.h>
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#include <u-boot/crc.h>
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static image_header_t header;
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static int image_check_image_types(uint8_t type)
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{
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if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) ||
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(type == IH_TYPE_KERNEL_NOLOAD))
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return EXIT_SUCCESS;
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else
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return EXIT_FAILURE;
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}
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static int image_check_params(struct mkimage_params *params)
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{
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return ((params->dflag && (params->fflag || params->lflag)) ||
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(params->fflag && (params->dflag || params->lflag)) ||
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(params->lflag && (params->dflag || params->fflag)));
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}
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static int image_verify_header(unsigned char *ptr, int image_size,
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struct mkimage_params *params)
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{
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uint32_t len;
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const unsigned char *data;
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uint32_t checksum;
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image_header_t header;
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image_header_t *hdr = &header;
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/*
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* create copy of header so that we can blank out the
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* checksum field for checking - this can't be done
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* on the PROT_READ mapped data.
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*/
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memcpy(hdr, ptr, sizeof(image_header_t));
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if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
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fprintf(stderr,
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"%s: Bad Magic Number: \"%s\" is no valid image\n",
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params->cmdname, params->imagefile);
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return -FDT_ERR_BADMAGIC;
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}
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data = (const unsigned char *)hdr;
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len = sizeof(image_header_t);
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checksum = be32_to_cpu(hdr->ih_hcrc);
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hdr->ih_hcrc = cpu_to_be32(0); /* clear for re-calculation */
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if (crc32(0, data, len) != checksum) {
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fprintf(stderr,
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"%s: ERROR: \"%s\" has bad header checksum!\n",
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params->cmdname, params->imagefile);
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return -FDT_ERR_BADSTATE;
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}
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data = (const unsigned char *)ptr + sizeof(image_header_t);
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len = image_size - sizeof(image_header_t) ;
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checksum = be32_to_cpu(hdr->ih_dcrc);
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if (crc32(0, data, len) != checksum) {
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fprintf(stderr,
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"%s: ERROR: \"%s\" has corrupted data!\n",
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params->cmdname, params->imagefile);
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return -FDT_ERR_BADSTRUCTURE;
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}
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return 0;
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}
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static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
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struct mkimage_params *params)
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{
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uint32_t checksum;
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image_header_t * hdr = (image_header_t *)ptr;
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checksum = crc32(0,
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(const unsigned char *)(ptr +
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sizeof(image_header_t)),
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sbuf->st_size - sizeof(image_header_t));
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/* Build new header */
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image_set_magic(hdr, IH_MAGIC);
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image_set_time(hdr, sbuf->st_mtime);
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image_set_size(hdr, sbuf->st_size - sizeof(image_header_t));
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image_set_load(hdr, params->addr);
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image_set_ep(hdr, params->ep);
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image_set_dcrc(hdr, checksum);
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image_set_os(hdr, params->os);
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image_set_arch(hdr, params->arch);
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image_set_type(hdr, params->type);
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image_set_comp(hdr, params->comp);
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image_set_name(hdr, params->imagename);
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checksum = crc32(0, (const unsigned char *)hdr,
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sizeof(image_header_t));
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image_set_hcrc(hdr, checksum);
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}
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/*
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* Default image type parameters definition
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*/
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static struct image_type_params defimage_params = {
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.name = "Default Image support",
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.header_size = sizeof(image_header_t),
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.hdr = (void*)&header,
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.check_image_type = image_check_image_types,
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.verify_header = image_verify_header,
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.print_header = image_print_contents,
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.set_header = image_set_header,
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.check_params = image_check_params,
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};
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void init_default_image_type(void)
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{
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mkimage_register(&defimage_params);
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}
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