cmd/spl.c

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