cmd/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2011
   4  * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <cmd_spl.h>
  10 #include <env.h>
  11 #include <linux/libfdt.h>
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 static const char **subcmd_list[] = {
  16
  17         [SPL_EXPORT_FDT] = (const char * []) {
  18 #ifdef CONFIG_OF_LIBFDT
  19                 "start",
  20                 "loados",
  21         #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  22                 "ramdisk",
  23         #endif
  24                 "fdt",
  25                 "cmdline",
  26                 "bdt",
  27                 "prep",
  28 #endif
  29                 NULL,
  30         },
  31         [SPL_EXPORT_ATAGS] = (const char * []) {
  32 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  33         defined(CONFIG_CMDLINE_TAG) || \
  34         defined(CONFIG_INITRD_TAG) || \
  35         defined(CONFIG_SERIAL_TAG) || \
  36         defined(CONFIG_REVISION_TAG)
  37                 "start",
  38                 "loados",
  39 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  40                 "ramdisk",
  41 #endif
  42                 "cmdline",
  43                 "bdt",
  44                 "prep",
  45 #endif
  46                 NULL,
  47         },
  48         NULL
  49 };
  50
  51 /* Calls bootm with the parameters given */
  52 static int call_bootm(int argc, char * const argv[], const char *subcommand[])
  53 {
  54         char *bootm_argv[5];
  55
  56         int i = 0;
  57         int ret = 0;
  58         int j;
  59
  60         /* create paramter array */
  61         bootm_argv[0] = "do_bootm";
  62         switch (argc) {
  63         case 3:
  64                 bootm_argv[4] = argv[2]; /* fdt addr */
  65         case 2:
  66                 bootm_argv[3] = argv[1]; /* initrd addr */
  67         case 1:
  68                 bootm_argv[2] = argv[0]; /* kernel addr */
  69         }
  70
  71
  72         /*
  73          * - do the work -
  74          * exec subcommands of do_bootm to init the images
  75          * data structure
  76          */
  77         while (subcommand[i] != NULL) {
  78                 bootm_argv[1] = (char *)subcommand[i];
  79                 debug("args %d: %s %s ", argc, bootm_argv[0], bootm_argv[1]);
  80                 for (j = 0; j < argc; j++)
  81                         debug("%s ", bootm_argv[j + 2]);
  82                 debug("\n");
  83
  84                 ret = do_bootm(find_cmd("do_bootm"), 0, argc+2,
  85                         bootm_argv);
  86                 debug("Subcommand retcode: %d\n", ret);
  87                 i++;
  88         }
  89
  90         if (ret) {
  91                 printf("ERROR prep subcommand failed!\n");
  92                 return -1;
  93         }
  94
  95         return 0;
  96 }
  97
  98 static cmd_tbl_t cmd_spl_export_sub[] = {
  99         U_BOOT_CMD_MKENT(fdt, 0, 1, (void *)SPL_EXPORT_FDT, "", ""),
 100         U_BOOT_CMD_MKENT(atags, 0, 1, (void *)SPL_EXPORT_ATAGS, "", ""),
 101 };
 102
 103 static int spl_export(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 104 {
 105         const cmd_tbl_t *c;
 106
 107         if (argc < 2) /* no subcommand */
 108                 return cmd_usage(cmdtp);
 109
 110         c = find_cmd_tbl(argv[1], &cmd_spl_export_sub[0],
 111                 ARRAY_SIZE(cmd_spl_export_sub));
 112         if ((c) && ((long)c->cmd <= SPL_EXPORT_LAST)) {
 113                 argc -= 2;
 114                 argv += 2;
 115                 if (call_bootm(argc, argv, subcmd_list[(long)c->cmd]))
 116                         return -1;
 117                 switch ((long)c->cmd) {
 118 #ifdef CONFIG_OF_LIBFDT
 119                 case SPL_EXPORT_FDT:
 120                         printf("Argument image is now in RAM: 0x%p\n",
 121                                 (void *)images.ft_addr);
 122                         env_set_addr("fdtargsaddr", images.ft_addr);
 123                         env_set_hex("fdtargslen", fdt_totalsize(images.ft_addr));
 124 #ifdef CONFIG_CMD_SPL_WRITE_SIZE
 125                         if (fdt_totalsize(images.ft_addr) >
 126                             CONFIG_CMD_SPL_WRITE_SIZE)
 127                                 puts("WARN: FDT size > CMD_SPL_WRITE_SIZE\n");
 128 #endif
 129                         break;
 130 #endif
 131                 case SPL_EXPORT_ATAGS:
 132                         printf("Argument image is now in RAM at: 0x%p\n",
 133                                 (void *)gd->bd->bi_boot_params);
 134                         break;
 135                 }
 136         } else {
 137                 /* Unrecognized command */
 138                 return cmd_usage(cmdtp);
 139         }
 140
 141         return 0;
 142 }
 143
 144 static cmd_tbl_t cmd_spl_sub[] = {
 145         U_BOOT_CMD_MKENT(export, 0, 1, (void *)SPL_EXPORT, "", ""),
 146 };
 147
 148 static int do_spl(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 149 {
 150         const cmd_tbl_t *c;
 151         int cmd;
 152
 153         if (argc < 2) /* no subcommand */
 154                 return cmd_usage(cmdtp);
 155
 156         c = find_cmd_tbl(argv[1], &cmd_spl_sub[0], ARRAY_SIZE(cmd_spl_sub));
 157         if (c) {
 158                 cmd = (long)c->cmd;
 159                 switch (cmd) {
 160                 case SPL_EXPORT:
 161                         argc--;
 162                         argv++;
 163                         if (spl_export(cmdtp, flag, argc, argv))
 164                                 printf("Subcommand failed\n");
 165                         break;
 166                 default:
 167                         /* unrecognized command */
 168                         return cmd_usage(cmdtp);
 169                 }
 170         } else {
 171                 /* Unrecognized command */
 172                 return cmd_usage(cmdtp);
 173         }
 174         return 0;
 175 }
 176
 177 U_BOOT_CMD(
 178         spl, 6 , 1, do_spl, "SPL configuration",
 179         "export <img=atags|fdt> [kernel_addr] [initrd_addr] [fdt_addr]\n"
 180         "\timg\t\t\"atags\" or \"fdt\"\n"
 181         "\tkernel_addr\taddress where a kernel image is stored.\n"
 182         "\t\t\tkernel is loaded as part of the boot process, but it is not started.\n"
 183         "\tinitrd_addr\taddress of initial ramdisk\n"
 184         "\t\t\tcan be set to \"-\" if fdt_addr without initrd_addr is used.\n"
 185         "\tfdt_addr\tin case of fdt, the address of the device tree.\n"
 186         );