tools/imagetool.h

   1 /*
   2  * (C) Copyright 2013
   3  *
   4  * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #ifndef _IMAGETOOL_H_
  10 #define _IMAGETOOL_H_
  11
  12 #include "os_support.h"
  13 #include <errno.h>
  14 #include <fcntl.h>
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <sys/stat.h>
  19 #include <time.h>
  20 #include <unistd.h>
  21 #include <u-boot/sha1.h>
  22
  23 /* define __KERNEL__ in order to get the definitions
  24  * required by the linker list. This is probably not
  25  * the best way to do this */
  26 #ifndef __KERNEL__
  27 #define __KERNEL__
  28 #include <linker_lists.h>
  29 #undef __KERNEL__
  30 #endif /* __KERNEL__ */
  31
  32 #include "fdt_host.h"
  33
  34 #define ARRAY_SIZE(x)           (sizeof(x) / sizeof((x)[0]))
  35
  36 #define IH_ARCH_DEFAULT         IH_ARCH_INVALID
  37
  38 /*
  39  * This structure defines all such variables those are initialized by
  40  * mkimage and dumpimage main core and need to be referred by image
  41  * type specific functions
  42  */
  43 struct image_tool_params {
  44         int dflag;
  45         int eflag;
  46         int fflag;
  47         int iflag;
  48         int lflag;
  49         int pflag;
  50         int vflag;
  51         int xflag;
  52         int skipcpy;
  53         int os;
  54         int arch;
  55         int type;
  56         int comp;
  57         char *dtc;
  58         unsigned int addr;
  59         unsigned int ep;
  60         char *imagename;
  61         char *imagename2;
  62         char *datafile;
  63         char *imagefile;
  64         char *cmdname;
  65         const char *outfile;    /* Output filename */
  66         const char *keydir;     /* Directory holding private keys */
  67         const char *keydest;    /* Destination .dtb for public key */
  68         const char *comment;    /* Comment to add to signature node */
  69         int require_keys;       /* 1 to mark signing keys as 'required' */
  70 };
  71
  72 /*
  73  * image type specific variables and callback functions
  74  */
  75 struct image_type_params {
  76         /* name is an identification tag string for added support */
  77         char *name;
  78         /*
  79          * header size is local to the specific image type to be supported,
  80          * mkimage core treats this as number of bytes
  81          */
  82         uint32_t header_size;
  83         /* Image type header pointer */
  84         void *hdr;
  85         /*
  86          * There are several arguments that are passed on the command line
  87          * and are registered as flags in image_tool_params structure.
  88          * This callback function can be used to check the passed arguments
  89          * are in-lined with the image type to be supported
  90          *
  91          * Returns 1 if parameter check is successful
  92          */
  93         int (*check_params) (struct image_tool_params *);
  94         /*
  95          * This function is used by list command (i.e. mkimage -l <filename>)
  96          * image type verification code must be put here
  97          *
  98          * Returns 0 if image header verification is successful
  99          * otherwise, returns respective negative error codes
 100          */
 101         int (*verify_header) (unsigned char *, int, struct image_tool_params *);
 102         /* Prints image information abstracting from image header */
 103         void (*print_header) (const void *);
 104         /*
 105          * The header or image contents need to be set as per image type to
 106          * be generated using this callback function.
 107          * further output file post processing (for ex. checksum calculation,
 108          * padding bytes etc..) can also be done in this callback function.
 109          */
 110         void (*set_header) (void *, struct stat *, int,
 111                                         struct image_tool_params *);
 112         /*
 113          * This function is used by the command to retrieve a component
 114          * (sub-image) from the image (i.e. dumpimage -i <image> -p <position>
 115          * <sub-image-name>).
 116          * Thus the code to extract a file from an image must be put here.
 117          *
 118          * Returns 0 if the file was successfully retrieved from the image,
 119          * or a negative value on error.
 120          */
 121         int (*extract_subimage)(void *, struct image_tool_params *);
 122         /*
 123          * Some image generation support for ex (default image type) supports
 124          * more than one type_ids, this callback function is used to check
 125          * whether input (-T <image_type>) is supported by registered image
 126          * generation/list low level code
 127          */
 128         int (*check_image_type) (uint8_t);
 129         /* This callback function will be executed if fflag is defined */
 130         int (*fflag_handle) (struct image_tool_params *);
 131         /*
 132          * This callback function will be executed for variable size record
 133          * It is expected to build this header in memory and return its length
 134          * and a pointer to it by using image_type_params.header_size and
 135          * image_type_params.hdr. The return value shall indicate if an
 136          * additional padding should be used when copying the data image
 137          * by returning the padding length.
 138          */
 139         int (*vrec_header) (struct image_tool_params *,
 140                 struct image_type_params *);
 141 };
 142
 143 /**
 144  * imagetool_get_type() - find the image type params for a given image type
 145  *
 146  * It scans all registers image type supports
 147  * checks the input type for each supported image type
 148  *
 149  * if successful,
 150  *     returns respective image_type_params pointer if success
 151  * if input type_id is not supported by any of image_type_support
 152  *     returns NULL
 153  */
 154 struct image_type_params *imagetool_get_type(int type);
 155
 156 /*
 157  * imagetool_verify_print_header() - verifies the image header
 158  *
 159  * Scan registered image types and verify the image_header for each
 160  * supported image type. If verification is successful, this prints
 161  * the respective header.
 162  *
 163  * @return 0 on success, negative if input image format does not match with
 164  * any of supported image types
 165  */
 166 int imagetool_verify_print_header(
 167         void *ptr,
 168         struct stat *sbuf,
 169         struct image_type_params *tparams,
 170         struct image_tool_params *params);
 171
 172 /**
 173  * imagetool_save_subimage - store data into a file
 174  * @file_name: name of the destination file
 175  * @file_data: data to be written
 176  * @file_len: the amount of data to store
 177  *
 178  * imagetool_save_subimage() store file_len bytes of data pointed by file_data
 179  * into the file name by file_name.
 180  *
 181  * returns:
 182  *     zero in case of success or a negative value if fail.
 183  */
 184 int imagetool_save_subimage(
 185         const char *file_name,
 186         ulong file_data,
 187         ulong file_len);
 188
 189 /*
 190  * There is a c file associated with supported image type low level code
 191  * for ex. default_image.c, fit_image.c
 192  */
 193
 194
 195 void pbl_load_uboot(int fd, struct image_tool_params *mparams);
 196
 197 #define U_BOOT_IMAGE_TYPE( \
 198                 _id, \
 199                 _name, \
 200                 _header_size, \
 201                 _header, \
 202                 _check_params, \
 203                 _verify_header, \
 204                 _print_header, \
 205                 _set_header, \
 206                 _extract_subimage, \
 207                 _check_image_type, \
 208                 _fflag_handle, \
 209                 _vrec_header \
 210         ) \
 211         ll_entry_declare(struct image_type_params, _id, image_type) = { \
 212                 .name = _name, \
 213                 .header_size = _header_size, \
 214                 .hdr = _header, \
 215                 .check_params = _check_params, \
 216                 .verify_header = _verify_header, \
 217                 .print_header = _print_header, \
 218                 .set_header = _set_header, \
 219                 .extract_subimage = _extract_subimage, \
 220                 .check_image_type = _check_image_type, \
 221                 .fflag_handle = _fflag_handle, \
 222                 .vrec_header = _vrec_header \
 223         }
 224
 225 #endif /* _IMAGETOOL_H_ */