cmd/source.c

   1 /*
   2  * (C) Copyright 2001
   3  * Kyle Harris, kharris@nexus-tech.net
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * The "source" command allows to define "script images", i. e. files
  10  * that contain command sequences that can be executed by the command
  11  * interpreter. It returns the exit status of the last command
  12  * executed from the script. This is very similar to running a shell
  13  * script in a UNIX shell, hence the name for the command.
  14  */
  15
  16 /* #define DEBUG */
  17
  18 #include <common.h>
  19 #include <command.h>
  20 #include <image.h>
  21 #include <malloc.h>
  22 #include <mapmem.h>
  23 #include <asm/byteorder.h>
  24 #include <asm/io.h>
  25 #if defined(CONFIG_8xx)
  26 #include <mpc8xx.h>
  27 #endif
  28
  29 int
  30 source (ulong addr, const char *fit_uname)
  31 {
  32         ulong           len;
  33 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
  34         const image_header_t *hdr;
  35 #endif
  36         u32             *data;
  37         int             verify;
  38         void *buf;
  39 #if defined(CONFIG_FIT)
  40         const void*     fit_hdr;
  41         int             noffset;
  42         const void      *fit_data;
  43         size_t          fit_len;
  44 #endif
  45
  46         verify = getenv_yesno ("verify");
  47
  48         buf = map_sysmem(addr, 0);
  49         switch (genimg_get_format(buf)) {
  50 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
  51         case IMAGE_FORMAT_LEGACY:
  52                 hdr = buf;
  53
  54                 if (!image_check_magic (hdr)) {
  55                         puts ("Bad magic number\n");
  56                         return 1;
  57                 }
  58
  59                 if (!image_check_hcrc (hdr)) {
  60                         puts ("Bad header crc\n");
  61                         return 1;
  62                 }
  63
  64                 if (verify) {
  65                         if (!image_check_dcrc (hdr)) {
  66                                 puts ("Bad data crc\n");
  67                                 return 1;
  68                         }
  69                 }
  70
  71                 if (!image_check_type (hdr, IH_TYPE_SCRIPT)) {
  72                         puts ("Bad image type\n");
  73                         return 1;
  74                 }
  75
  76                 /* get length of script */
  77                 data = (u32 *)image_get_data (hdr);
  78
  79                 if ((len = uimage_to_cpu (*data)) == 0) {
  80                         puts ("Empty Script\n");
  81                         return 1;
  82                 }
  83
  84                 /*
  85                  * scripts are just multi-image files with one component, seek
  86                  * past the zero-terminated sequence of image lengths to get
  87                  * to the actual image data
  88                  */
  89                 while (*data++);
  90                 break;
  91 #endif
  92 #if defined(CONFIG_FIT)
  93         case IMAGE_FORMAT_FIT:
  94                 if (fit_uname == NULL) {
  95                         puts ("No FIT subimage unit name\n");
  96                         return 1;
  97                 }
  98
  99                 fit_hdr = buf;
 100                 if (!fit_check_format (fit_hdr)) {
 101                         puts ("Bad FIT image format\n");
 102                         return 1;
 103                 }
 104
 105                 /* get script component image node offset */
 106                 noffset = fit_image_get_node (fit_hdr, fit_uname);
 107                 if (noffset < 0) {
 108                         printf ("Can't find '%s' FIT subimage\n", fit_uname);
 109                         return 1;
 110                 }
 111
 112                 if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) {
 113                         puts ("Not a image image\n");
 114                         return 1;
 115                 }
 116
 117                 /* verify integrity */
 118                 if (verify) {
 119                         if (!fit_image_verify(fit_hdr, noffset)) {
 120                                 puts ("Bad Data Hash\n");
 121                                 return 1;
 122                         }
 123                 }
 124
 125                 /* get script subimage data address and length */
 126                 if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) {
 127                         puts ("Could not find script subimage data\n");
 128                         return 1;
 129                 }
 130
 131                 data = (u32 *)fit_data;
 132                 len = (ulong)fit_len;
 133                 break;
 134 #endif
 135         default:
 136                 puts ("Wrong image format for \"source\" command\n");
 137                 return 1;
 138         }
 139
 140         debug ("** Script length: %ld\n", len);
 141         return run_command_list((char *)data, len, 0);
 142 }
 143
 144 /**************************************************/
 145 #if defined(CONFIG_CMD_SOURCE)
 146 static int do_source(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 147 {
 148         ulong addr;
 149         int rcode;
 150         const char *fit_uname = NULL;
 151
 152         /* Find script image */
 153         if (argc < 2) {
 154                 addr = CONFIG_SYS_LOAD_ADDR;
 155                 debug ("*  source: default load address = 0x%08lx\n", addr);
 156 #if defined(CONFIG_FIT)
 157         } else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) {
 158                 debug ("*  source: subimage '%s' from FIT image at 0x%08lx\n",
 159                                 fit_uname, addr);
 160 #endif
 161         } else {
 162                 addr = simple_strtoul(argv[1], NULL, 16);
 163                 debug ("*  source: cmdline image address = 0x%08lx\n", addr);
 164         }
 165
 166         printf ("## Executing script at %08lx\n", addr);
 167         rcode = source (addr, fit_uname);
 168         return rcode;
 169 }
 170
 171 #ifdef CONFIG_SYS_LONGHELP
 172 static char source_help_text[] =
 173         "[addr]\n"
 174         "\t- run script starting at addr\n"
 175         "\t- A valid image header must be present"
 176 #if defined(CONFIG_FIT)
 177         "\n"
 178         "For FIT format uImage addr must include subimage\n"
 179         "unit name in the form of addr:<subimg_uname>"
 180 #endif
 181         "";
 182 #endif
 183
 184 U_BOOT_CMD(
 185         source, 2, 0,   do_source,
 186         "run script from memory", source_help_text
 187 );
 188 #endif