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 <asm/global_data.h>
  14 #include <linux/libfdt.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 static const char **subcmd_list[] = {
  19
  20         [SPL_EXPORT_FDT] = (const char * []) {
  21 #ifdef CONFIG_OF_LIBFDT
  22                 "start",
  23                 "loados",
  24         #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  25                 "ramdisk",
  26         #endif
  27                 "fdt",
  28                 "cmdline",
  29                 "bdt",
  30                 "prep",
  31 #endif
  32                 NULL,
  33         },
  34         [SPL_EXPORT_ATAGS] = (const char * []) {
  35 #ifdef CONFIG_SUPPORT_PASSING_ATAGS
  36                 "start",
  37                 "loados",
  38 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  39                 "ramdisk",
  40 #endif
  41                 "cmdline",
  42                 "bdt",
  43                 "prep",
  44 #endif
  45                 NULL,
  46         },
  47         NULL
  48 };
  49
  50 /* Calls bootm with the parameters given */
  51 static int call_bootm(int argc, char *const argv[], const char *subcommand[])
  52 {
  53         char *bootm_argv[5];
  54
  55         int i = 0;
  56         int ret = 0;
  57         int j;
  58
  59         /* create paramter array */
  60         bootm_argv[0] = "do_bootm";
  61         switch (argc) {
  62         case 3:
  63                 bootm_argv[4] = argv[2]; /* fdt addr */
  64         case 2:
  65                 bootm_argv[3] = argv[1]; /* initrd addr */
  66         case 1:
  67                 bootm_argv[2] = argv[0]; /* kernel addr */
  68         }
  69
  70
  71         /*
  72          * - do the work -
  73          * exec subcommands of do_bootm to init the images
  74          * data structure
  75          */
  76         while (subcommand[i] != NULL) {
  77                 bootm_argv[1] = (char *)subcommand[i];
  78                 debug("args %d: %s %s ", argc, bootm_argv[0], bootm_argv[1]);
  79                 for (j = 0; j < argc; j++)
  80                         debug("%s ", bootm_argv[j + 2]);
  81                 debug("\n");
  82
  83                 ret = do_bootm(find_cmd("do_bootm"), 0, argc+2,
  84                         bootm_argv);
  85                 debug("Subcommand retcode: %d\n", ret);
  86                 i++;
  87         }
  88
  89         if (ret) {
  90                 printf("ERROR prep subcommand failed!\n");
  91                 return -1;
  92         }
  93
  94         return 0;
  95 }
  96
  97 static struct cmd_tbl cmd_spl_export_sub[] = {
  98         U_BOOT_CMD_MKENT(fdt, 0, 1, (void *)SPL_EXPORT_FDT, "", ""),
  99         U_BOOT_CMD_MKENT(atags, 0, 1, (void *)SPL_EXPORT_ATAGS, "", ""),
 100 };
 101
 102 static int spl_export(struct cmd_tbl *cmdtp, int flag, int argc,
 103                       char *const argv[])
 104 {
 105         const struct cmd_tbl *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 struct cmd_tbl cmd_spl_sub[] = {
 145         U_BOOT_CMD_MKENT(export, 0, 1, (void *)SPL_EXPORT, "", ""),
 146 };
 147
 148 static int do_spl(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 149 {
 150         const struct cmd_tbl *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         );