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 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  36         defined(CONFIG_CMDLINE_TAG) || \
  37         defined(CONFIG_INITRD_TAG) || \
  38         defined(CONFIG_SERIAL_TAG) || \
  39         defined(CONFIG_REVISION_TAG)
  40                 "start",
  41                 "loados",
  42 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  43                 "ramdisk",
  44 #endif
  45                 "cmdline",
  46                 "bdt",
  47                 "prep",
  48 #endif
  49                 NULL,
  50         },
  51         NULL
  52 };
  53
  54 /* Calls bootm with the parameters given */
  55 static int call_bootm(int argc, char *const argv[], const char *subcommand[])
  56 {
  57         char *bootm_argv[5];
  58
  59         int i = 0;
  60         int ret = 0;
  61         int j;
  62
  63         /* create paramter array */
  64         bootm_argv[0] = "do_bootm";
  65         switch (argc) {
  66         case 3:
  67                 bootm_argv[4] = argv[2]; /* fdt addr */
  68         case 2:
  69                 bootm_argv[3] = argv[1]; /* initrd addr */
  70         case 1:
  71                 bootm_argv[2] = argv[0]; /* kernel addr */
  72         }
  73
  74
  75         /*
  76          * - do the work -
  77          * exec subcommands of do_bootm to init the images
  78          * data structure
  79          */
  80         while (subcommand[i] != NULL) {
  81                 bootm_argv[1] = (char *)subcommand[i];
  82                 debug("args %d: %s %s ", argc, bootm_argv[0], bootm_argv[1]);
  83                 for (j = 0; j < argc; j++)
  84                         debug("%s ", bootm_argv[j + 2]);
  85                 debug("\n");
  86
  87                 ret = do_bootm(find_cmd("do_bootm"), 0, argc+2,
  88                         bootm_argv);
  89                 debug("Subcommand retcode: %d\n", ret);
  90                 i++;
  91         }
  92
  93         if (ret) {
  94                 printf("ERROR prep subcommand failed!\n");
  95                 return -1;
  96         }
  97
  98         return 0;
  99 }
 100
 101 static struct cmd_tbl cmd_spl_export_sub[] = {
 102         U_BOOT_CMD_MKENT(fdt, 0, 1, (void *)SPL_EXPORT_FDT, "", ""),
 103         U_BOOT_CMD_MKENT(atags, 0, 1, (void *)SPL_EXPORT_ATAGS, "", ""),
 104 };
 105
 106 static int spl_export(struct cmd_tbl *cmdtp, int flag, int argc,
 107                       char *const argv[])
 108 {
 109         const struct cmd_tbl *c;
 110
 111         if (argc < 2) /* no subcommand */
 112                 return cmd_usage(cmdtp);
 113
 114         c = find_cmd_tbl(argv[1], &cmd_spl_export_sub[0],
 115                 ARRAY_SIZE(cmd_spl_export_sub));
 116         if ((c) && ((long)c->cmd <= SPL_EXPORT_LAST)) {
 117                 argc -= 2;
 118                 argv += 2;
 119                 if (call_bootm(argc, argv, subcmd_list[(long)c->cmd]))
 120                         return -1;
 121                 switch ((long)c->cmd) {
 122 #ifdef CONFIG_OF_LIBFDT
 123                 case SPL_EXPORT_FDT:
 124                         printf("Argument image is now in RAM: 0x%p\n",
 125                                 (void *)images.ft_addr);
 126                         env_set_addr("fdtargsaddr", images.ft_addr);
 127                         env_set_hex("fdtargslen", fdt_totalsize(images.ft_addr));
 128 #ifdef CONFIG_CMD_SPL_WRITE_SIZE
 129                         if (fdt_totalsize(images.ft_addr) >
 130                             CONFIG_CMD_SPL_WRITE_SIZE)
 131                                 puts("WARN: FDT size > CMD_SPL_WRITE_SIZE\n");
 132 #endif
 133                         break;
 134 #endif
 135                 case SPL_EXPORT_ATAGS:
 136                         printf("Argument image is now in RAM at: 0x%p\n",
 137                                 (void *)gd->bd->bi_boot_params);
 138                         break;
 139                 }
 140         } else {
 141                 /* Unrecognized command */
 142                 return cmd_usage(cmdtp);
 143         }
 144
 145         return 0;
 146 }
 147
 148 static struct cmd_tbl cmd_spl_sub[] = {
 149         U_BOOT_CMD_MKENT(export, 0, 1, (void *)SPL_EXPORT, "", ""),
 150 };
 151
 152 static int do_spl(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 153 {
 154         const struct cmd_tbl *c;
 155         int cmd;
 156
 157         if (argc < 2) /* no subcommand */
 158                 return cmd_usage(cmdtp);
 159
 160         c = find_cmd_tbl(argv[1], &cmd_spl_sub[0], ARRAY_SIZE(cmd_spl_sub));
 161         if (c) {
 162                 cmd = (long)c->cmd;
 163                 switch (cmd) {
 164                 case SPL_EXPORT:
 165                         argc--;
 166                         argv++;
 167                         if (spl_export(cmdtp, flag, argc, argv))
 168                                 printf("Subcommand failed\n");
 169                         break;
 170                 default:
 171                         /* unrecognized command */
 172                         return cmd_usage(cmdtp);
 173                 }
 174         } else {
 175                 /* Unrecognized command */
 176                 return cmd_usage(cmdtp);
 177         }
 178         return 0;
 179 }
 180
 181 U_BOOT_CMD(
 182         spl, 6 , 1, do_spl, "SPL configuration",
 183         "export <img=atags|fdt> [kernel_addr] [initrd_addr] [fdt_addr]\n"
 184         "\timg\t\t\"atags\" or \"fdt\"\n"
 185         "\tkernel_addr\taddress where a kernel image is stored.\n"
 186         "\t\t\tkernel is loaded as part of the boot process, but it is not started.\n"
 187         "\tinitrd_addr\taddress of initial ramdisk\n"
 188         "\t\t\tcan be set to \"-\" if fdt_addr without initrd_addr is used.\n"
 189         "\tfdt_addr\tin case of fdt, the address of the device tree.\n"
 190         );