1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2001 4 * Kyle Harris, kharris@nexus-tech.net 5 */ 6 7 /* 8 * The "source" command allows to define "script images", i. e. files 9 * that contain command sequences that can be executed by the command 10 * interpreter. It returns the exit status of the last command 11 * executed from the script. This is very similar to running a shell 12 * script in a UNIX shell, hence the name for the command. 13 */ 14 15 /* #define DEBUG */ 16 17 #include <common.h> 18 #include <command.h> 19 #include <image.h> 20 #include <malloc.h> 21 #include <mapmem.h> 22 #include <asm/byteorder.h> 23 #include <asm/io.h> 24 25 #if defined(CONFIG_FIT) 26 /** 27 * get_default_image() - Return default property from /images 28 * 29 * Return: Pointer to value of default property (or NULL) 30 */ 31 static const char *get_default_image(const void *fit) 32 { 33 int images_noffset; 34 35 images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH); 36 if (images_noffset < 0) 37 return NULL; 38 39 return fdt_getprop(fit, images_noffset, FIT_DEFAULT_PROP, NULL); 40 } 41 #endif 42 43 int 44 source (ulong addr, const char *fit_uname) 45 { 46 ulong len; 47 #if defined(CONFIG_IMAGE_FORMAT_LEGACY) 48 const image_header_t *hdr; 49 #endif 50 u32 *data; 51 int verify; 52 void *buf; 53 #if defined(CONFIG_FIT) 54 const void* fit_hdr; 55 int noffset; 56 const void *fit_data; 57 size_t fit_len; 58 #endif 59 60 verify = env_get_yesno("verify"); 61 62 buf = map_sysmem(addr, 0); 63 switch (genimg_get_format(buf)) { 64 #if defined(CONFIG_IMAGE_FORMAT_LEGACY) 65 case IMAGE_FORMAT_LEGACY: 66 hdr = buf; 67 68 if (!image_check_magic (hdr)) { 69 puts ("Bad magic number\n"); 70 return 1; 71 } 72 73 if (!image_check_hcrc (hdr)) { 74 puts ("Bad header crc\n"); 75 return 1; 76 } 77 78 if (verify) { 79 if (!image_check_dcrc (hdr)) { 80 puts ("Bad data crc\n"); 81 return 1; 82 } 83 } 84 85 if (!image_check_type (hdr, IH_TYPE_SCRIPT)) { 86 puts ("Bad image type\n"); 87 return 1; 88 } 89 90 /* get length of script */ 91 data = (u32 *)image_get_data (hdr); 92 93 if ((len = uimage_to_cpu (*data)) == 0) { 94 puts ("Empty Script\n"); 95 return 1; 96 } 97 98 /* 99 * scripts are just multi-image files with one component, seek 100 * past the zero-terminated sequence of image lengths to get 101 * to the actual image data 102 */ 103 while (*data++); 104 break; 105 #endif 106 #if defined(CONFIG_FIT) 107 case IMAGE_FORMAT_FIT: 108 fit_hdr = buf; 109 if (!fit_check_format (fit_hdr)) { 110 puts ("Bad FIT image format\n"); 111 return 1; 112 } 113 114 if (!fit_uname) 115 fit_uname = get_default_image(fit_hdr); 116 117 if (!fit_uname) { 118 puts("No FIT subimage unit name\n"); 119 return 1; 120 } 121 122 /* get script component image node offset */ 123 noffset = fit_image_get_node (fit_hdr, fit_uname); 124 if (noffset < 0) { 125 printf ("Can't find '%s' FIT subimage\n", fit_uname); 126 return 1; 127 } 128 129 if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) { 130 puts ("Not a image image\n"); 131 return 1; 132 } 133 134 /* verify integrity */ 135 if (verify) { 136 if (!fit_image_verify(fit_hdr, noffset)) { 137 puts ("Bad Data Hash\n"); 138 return 1; 139 } 140 } 141 142 /* get script subimage data address and length */ 143 if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) { 144 puts ("Could not find script subimage data\n"); 145 return 1; 146 } 147 148 data = (u32 *)fit_data; 149 len = (ulong)fit_len; 150 break; 151 #endif 152 default: 153 puts ("Wrong image format for \"source\" command\n"); 154 return 1; 155 } 156 157 debug ("** Script length: %ld\n", len); 158 return run_command_list((char *)data, len, 0); 159 } 160 161 /**************************************************/ 162 #if defined(CONFIG_CMD_SOURCE) 163 static int do_source(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 164 { 165 ulong addr; 166 int rcode; 167 const char *fit_uname = NULL; 168 169 /* Find script image */ 170 if (argc < 2) { 171 addr = CONFIG_SYS_LOAD_ADDR; 172 debug ("* source: default load address = 0x%08lx\n", addr); 173 #if defined(CONFIG_FIT) 174 } else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) { 175 debug ("* source: subimage '%s' from FIT image at 0x%08lx\n", 176 fit_uname, addr); 177 #endif 178 } else { 179 addr = simple_strtoul(argv[1], NULL, 16); 180 debug ("* source: cmdline image address = 0x%08lx\n", addr); 181 } 182 183 printf ("## Executing script at %08lx\n", addr); 184 rcode = source (addr, fit_uname); 185 return rcode; 186 } 187 188 #ifdef CONFIG_SYS_LONGHELP 189 static char source_help_text[] = 190 "[addr]\n" 191 "\t- run script starting at addr\n" 192 "\t- A valid image header must be present" 193 #if defined(CONFIG_FIT) 194 "\n" 195 "For FIT format uImage addr must include subimage\n" 196 "unit name in the form of addr:<subimg_uname>" 197 #endif 198 ""; 199 #endif 200 201 U_BOOT_CMD( 202 source, 2, 0, do_source, 203 "run script from memory", source_help_text 204 ); 205 #endif 206