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 <image.h>
  12 #include <log.h>
  13 #include <linux/libfdt.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 static const char **subcmd_list[] = {
  18
  19         [SPL_EXPORT_FDT] = (const char * []) {
  20 #ifdef CONFIG_OF_LIBFDT
  21                 "start",
  22                 "loados",
  23         #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  24                 "ramdisk",
  25         #endif
  26                 "fdt",
  27                 "cmdline",
  28                 "bdt",
  29                 "prep",
  30 #endif
  31                 NULL,
  32         },
  33         [SPL_EXPORT_ATAGS] = (const char * []) {
  34 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  35         defined(CONFIG_CMDLINE_TAG) || \
  36         defined(CONFIG_INITRD_TAG) || \
  37         defined(CONFIG_SERIAL_TAG) || \
  38         defined(CONFIG_REVISION_TAG)
  39                 "start",
  40                 "loados",
  41 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  42                 "ramdisk",
  43 #endif
  44                 "cmdline",
  45                 "bdt",
  46                 "prep",
  47 #endif
  48                 NULL,
  49         },
  50         NULL
  51 };
  52
  53 /* Calls bootm with the parameters given */
  54 static int call_bootm(int argc, char *const argv[], const char *subcommand[])
  55 {
  56         char *bootm_argv[5];
  57
  58         int i = 0;
  59         int ret = 0;
  60         int j;
  61
  62         /* create paramter array */
  63         bootm_argv[0] = "do_bootm";
  64         switch (argc) {
  65         case 3:
  66                 bootm_argv[4] = argv[2]; /* fdt addr */
  67         case 2:
  68                 bootm_argv[3] = argv[1]; /* initrd addr */
  69         case 1:
  70                 bootm_argv[2] = argv[0]; /* kernel addr */
  71         }
  72
  73
  74         /*
  75          * - do the work -
  76          * exec subcommands of do_bootm to init the images
  77          * data structure
  78          */
  79         while (subcommand[i] != NULL) {
  80                 bootm_argv[1] = (char *)subcommand[i];
  81                 debug("args %d: %s %s ", argc, bootm_argv[0], bootm_argv[1]);
  82                 for (j = 0; j < argc; j++)
  83                         debug("%s ", bootm_argv[j + 2]);
  84                 debug("\n");
  85
  86                 ret = do_bootm(find_cmd("do_bootm"), 0, argc+2,
  87                         bootm_argv);
  88                 debug("Subcommand retcode: %d\n", ret);
  89                 i++;
  90         }
  91
  92         if (ret) {
  93                 printf("ERROR prep subcommand failed!\n");
  94                 return -1;
  95         }
  96
  97         return 0;
  98 }
  99
 100 static struct cmd_tbl cmd_spl_export_sub[] = {
 101         U_BOOT_CMD_MKENT(fdt, 0, 1, (void *)SPL_EXPORT_FDT, "", ""),
 102         U_BOOT_CMD_MKENT(atags, 0, 1, (void *)SPL_EXPORT_ATAGS, "", ""),
 103 };
 104
 105 static int spl_export(struct cmd_tbl *cmdtp, int flag, int argc,
 106                       char *const argv[])
 107 {
 108         const struct cmd_tbl *c;
 109
 110         if (argc < 2) /* no subcommand */
 111                 return cmd_usage(cmdtp);
 112
 113         c = find_cmd_tbl(argv[1], &cmd_spl_export_sub[0],
 114                 ARRAY_SIZE(cmd_spl_export_sub));
 115         if ((c) && ((long)c->cmd <= SPL_EXPORT_LAST)) {
 116                 argc -= 2;
 117                 argv += 2;
 118                 if (call_bootm(argc, argv, subcmd_list[(long)c->cmd]))
 119                         return -1;
 120                 switch ((long)c->cmd) {
 121 #ifdef CONFIG_OF_LIBFDT
 122                 case SPL_EXPORT_FDT:
 123                         printf("Argument image is now in RAM: 0x%p\n",
 124                                 (void *)images.ft_addr);
 125                         env_set_addr("fdtargsaddr", images.ft_addr);
 126                         env_set_hex("fdtargslen", fdt_totalsize(images.ft_addr));
 127 #ifdef CONFIG_CMD_SPL_WRITE_SIZE
 128                         if (fdt_totalsize(images.ft_addr) >
 129                             CONFIG_CMD_SPL_WRITE_SIZE)
 130                                 puts("WARN: FDT size > CMD_SPL_WRITE_SIZE\n");
 131 #endif
 132                         break;
 133 #endif
 134                 case SPL_EXPORT_ATAGS:
 135                         printf("Argument image is now in RAM at: 0x%p\n",
 136                                 (void *)gd->bd->bi_boot_params);
 137                         break;
 138                 }
 139         } else {
 140                 /* Unrecognized command */
 141                 return cmd_usage(cmdtp);
 142         }
 143
 144         return 0;
 145 }
 146
 147 static struct cmd_tbl cmd_spl_sub[] = {
 148         U_BOOT_CMD_MKENT(export, 0, 1, (void *)SPL_EXPORT, "", ""),
 149 };
 150
 151 static int do_spl(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 152 {
 153         const struct cmd_tbl *c;
 154         int cmd;
 155
 156         if (argc < 2) /* no subcommand */
 157                 return cmd_usage(cmdtp);
 158
 159         c = find_cmd_tbl(argv[1], &cmd_spl_sub[0], ARRAY_SIZE(cmd_spl_sub));
 160         if (c) {
 161                 cmd = (long)c->cmd;
 162                 switch (cmd) {
 163                 case SPL_EXPORT:
 164                         argc--;
 165                         argv++;
 166                         if (spl_export(cmdtp, flag, argc, argv))
 167                                 printf("Subcommand failed\n");
 168                         break;
 169                 default:
 170                         /* unrecognized command */
 171                         return cmd_usage(cmdtp);
 172                 }
 173         } else {
 174                 /* Unrecognized command */
 175                 return cmd_usage(cmdtp);
 176         }
 177         return 0;
 178 }
 179
 180 U_BOOT_CMD(
 181         spl, 6 , 1, do_spl, "SPL configuration",
 182         "export <img=atags|fdt> [kernel_addr] [initrd_addr] [fdt_addr]\n"
 183         "\timg\t\t\"atags\" or \"fdt\"\n"
 184         "\tkernel_addr\taddress where a kernel image is stored.\n"
 185         "\t\t\tkernel is loaded as part of the boot process, but it is not started.\n"
 186         "\tinitrd_addr\taddress of initial ramdisk\n"
 187         "\t\t\tcan be set to \"-\" if fdt_addr without initrd_addr is used.\n"
 188         "\tfdt_addr\tin case of fdt, the address of the device tree.\n"
 189         );