cmd/cramfs.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *
   4  * based on: cmd_jffs2.c
   5  *
   6  *      Add support for a CRAMFS located in RAM
   7  */
   8
   9 /*
  10  * CRAMFS support
  11  */
  12 #include <command.h>
  13 #include <env.h>
  14 #include <image.h>
  15 #include <malloc.h>
  16 #include <mapmem.h>
  17 #include <linux/list.h>
  18 #include <linux/ctype.h>
  19 #include <jffs2/jffs2.h>
  20 #include <jffs2/load_kernel.h>
  21 #include <cramfs/cramfs_fs.h>
  22 #include <asm/io.h>
  23
  24 /* enable/disable debugging messages */
  25 #define DEBUG_CRAMFS
  26 #undef  DEBUG_CRAMFS
  27
  28 #ifdef  DEBUG_CRAMFS
  29 # define DEBUGF(fmt, args...)   printf(fmt ,##args)
  30 #else
  31 # define DEBUGF(fmt, args...)
  32 #endif
  33
  34 #ifndef CONFIG_MTD_NOR_FLASH
  35 # define OFFSET_ADJUSTMENT      0
  36 #else
  37 #include <flash.h>
  38 # define OFFSET_ADJUSTMENT      (flash_info[id.num].start[0])
  39 #endif
  40
  41 #ifndef CONFIG_FS_JFFS2
  42 #include <linux/stat.h>
  43 char *mkmodestr(unsigned long mode, char *str)
  44 {
  45         static const char *l = "xwr";
  46         int mask = 1, i;
  47         char c;
  48
  49         switch (mode & S_IFMT) {
  50                 case S_IFDIR:    str[0] = 'd'; break;
  51                 case S_IFBLK:    str[0] = 'b'; break;
  52                 case S_IFCHR:    str[0] = 'c'; break;
  53                 case S_IFIFO:    str[0] = 'f'; break;
  54                 case S_IFLNK:    str[0] = 'l'; break;
  55                 case S_IFSOCK:   str[0] = 's'; break;
  56                 case S_IFREG:    str[0] = '-'; break;
  57                 default:         str[0] = '?';
  58         }
  59
  60         for(i = 0; i < 9; i++) {
  61                 c = l[i%3];
  62                 str[9-i] = (mode & mask)?c:'-';
  63                 mask = mask<<1;
  64         }
  65
  66         if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
  67         if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
  68         if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
  69         str[10] = '\0';
  70         return str;
  71 }
  72 #endif /* CONFIG_FS_JFFS2 */
  73
  74 extern int cramfs_check (struct part_info *info);
  75 extern int cramfs_load (char *loadoffset, struct part_info *info, char *filename);
  76 extern int cramfs_ls (struct part_info *info, char *filename);
  77 extern int cramfs_info (struct part_info *info);
  78
  79 /***************************************************/
  80 /* U-Boot commands                                 */
  81 /***************************************************/
  82
  83 /**
  84  * Routine implementing fsload u-boot command. This routine tries to load
  85  * a requested file from cramfs filesystem at location 'cramfsaddr'.
  86  * cramfsaddr is an evironment variable.
  87  *
  88  * @param cmdtp command internal data
  89  * @param flag command flag
  90  * @param argc number of arguments supplied to the command
  91  * @param argv arguments list
  92  * Return: 0 on success, 1 otherwise
  93  */
  94 int do_cramfs_load(struct cmd_tbl *cmdtp, int flag, int argc,
  95                    char *const argv[])
  96 {
  97         char *filename;
  98         int size;
  99         ulong offset = image_load_addr;
 100         char *offset_virt;
 101
 102         struct part_info part;
 103         struct mtd_device dev;
 104         struct mtdids id;
 105
 106         ulong addr;
 107         addr = hextoul(env_get("cramfsaddr"), NULL);
 108
 109         /* hack! */
 110         /* cramfs_* only supports NOR flash chips */
 111         /* fake the device type */
 112         id.type = MTD_DEV_TYPE_NOR;
 113         id.num = 0;
 114         dev.id = &id;
 115         part.dev = &dev;
 116         /* fake the address offset */
 117         part.offset = (u64)(uintptr_t) map_sysmem(addr - OFFSET_ADJUSTMENT, 0);
 118
 119         /* pre-set Boot file name */
 120         filename = env_get("bootfile");
 121         if (!filename)
 122                 filename = "uImage";
 123
 124         if (argc == 2) {
 125                 filename = argv[1];
 126         }
 127         if (argc == 3) {
 128                 offset = simple_strtoul(argv[1], NULL, 0);
 129                 image_load_addr = offset;
 130                 filename = argv[2];
 131         }
 132
 133         offset_virt = map_sysmem(offset, 0);
 134         size = 0;
 135         if (cramfs_check(&part))
 136                 size = cramfs_load (offset_virt, &part, filename);
 137
 138         if (size > 0) {
 139                 printf("### CRAMFS load complete: %d bytes loaded to 0x%lx\n",
 140                         size, offset);
 141                 env_set_hex("filesize", size);
 142         } else {
 143                 printf("### CRAMFS LOAD ERROR<%x> for %s!\n", size, filename);
 144         }
 145
 146         unmap_sysmem(offset_virt);
 147         unmap_sysmem((void *)(uintptr_t)part.offset);
 148
 149         return !(size > 0);
 150 }
 151
 152 /**
 153  * Routine implementing u-boot ls command which lists content of a given
 154  * directory at location 'cramfsaddr'.
 155  * cramfsaddr is an evironment variable.
 156  *
 157  * @param cmdtp command internal data
 158  * @param flag command flag
 159  * @param argc number of arguments supplied to the command
 160  * @param argv arguments list
 161  * Return: 0 on success, 1 otherwise
 162  */
 163 int do_cramfs_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 164 {
 165         char *filename = "/";
 166         int ret;
 167         struct part_info part;
 168         struct mtd_device dev;
 169         struct mtdids id;
 170
 171         ulong addr;
 172         addr = hextoul(env_get("cramfsaddr"), NULL);
 173
 174         /* hack! */
 175         /* cramfs_* only supports NOR flash chips */
 176         /* fake the device type */
 177         id.type = MTD_DEV_TYPE_NOR;
 178         id.num = 0;
 179         dev.id = &id;
 180         part.dev = &dev;
 181         /* fake the address offset */
 182         part.offset = (u64)(uintptr_t) map_sysmem(addr - OFFSET_ADJUSTMENT, 0);
 183
 184         if (argc == 2)
 185                 filename = argv[1];
 186
 187         ret = 0;
 188         if (cramfs_check(&part))
 189                 ret = cramfs_ls (&part, filename);
 190         unmap_sysmem((void *)(uintptr_t)part.offset);
 191
 192         return ret ? 0 : 1;
 193 }
 194
 195 /* command line only */
 196
 197 /***************************************************/
 198 U_BOOT_CMD(
 199         cramfsload,     3,      0,      do_cramfs_load,
 200         "load binary file from a filesystem image",
 201         "[ off ] [ filename ]\n"
 202         "    - load binary file from address 'cramfsaddr'\n"
 203         "      with offset 'off'\n"
 204 );
 205 U_BOOT_CMD(
 206         cramfsls,       2,      1,      do_cramfs_ls,
 207         "list files in a directory (default /)",
 208         "[ directory ]\n"
 209         "    - list files in a directory.\n"
 210 );