cmd/bootz.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000-2009
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 #include <common.h>
   8 #include <bootm.h>
   9 #include <command.h>
  10 #include <lmb.h>
  11 #include <linux/compiler.h>
  12
  13 int __weak bootz_setup(ulong image, ulong *start, ulong *end)
  14 {
  15         /* Please define bootz_setup() for your platform */
  16
  17         puts("Your platform's zImage format isn't supported yet!\n");
  18         return -1;
  19 }
  20
  21 /*
  22  * zImage booting support
  23  */
  24 static int bootz_start(cmd_tbl_t *cmdtp, int flag, int argc,
  25                         char * const argv[], bootm_headers_t *images)
  26 {
  27         int ret;
  28         ulong zi_start, zi_end;
  29
  30         ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
  31                               images, 1);
  32
  33         /* Setup Linux kernel zImage entry point */
  34         if (!argc) {
  35                 images->ep = load_addr;
  36                 debug("*  kernel: default image load address = 0x%08lx\n",
  37                                 load_addr);
  38         } else {
  39                 images->ep = simple_strtoul(argv[0], NULL, 16);
  40                 debug("*  kernel: cmdline image address = 0x%08lx\n",
  41                         images->ep);
  42         }
  43
  44         ret = bootz_setup(images->ep, &zi_start, &zi_end);
  45         if (ret != 0)
  46                 return 1;
  47
  48         lmb_reserve(&images->lmb, images->ep, zi_end - zi_start);
  49
  50         /*
  51          * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
  52          * have a header that provide this informaiton.
  53          */
  54         if (bootm_find_images(flag, argc, argv))
  55                 return 1;
  56
  57         return 0;
  58 }
  59
  60 int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  61 {
  62         int ret;
  63
  64         /* Consume 'bootz' */
  65         argc--; argv++;
  66
  67         if (bootz_start(cmdtp, flag, argc, argv, &images))
  68                 return 1;
  69
  70         /*
  71          * We are doing the BOOTM_STATE_LOADOS state ourselves, so must
  72          * disable interrupts ourselves
  73          */
  74         bootm_disable_interrupts();
  75
  76         images.os.os = IH_OS_LINUX;
  77         ret = do_bootm_states(cmdtp, flag, argc, argv,
  78 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  79                               BOOTM_STATE_RAMDISK |
  80 #endif
  81                               BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
  82                               BOOTM_STATE_OS_GO,
  83                               &images, 1);
  84
  85         return ret;
  86 }
  87
  88 #ifdef CONFIG_SYS_LONGHELP
  89 static char bootz_help_text[] =
  90         "[addr [initrd[:size]] [fdt]]\n"
  91         "    - boot Linux zImage stored in memory\n"
  92         "\tThe argument 'initrd' is optional and specifies the address\n"
  93         "\tof the initrd in memory. The optional argument ':size' allows\n"
  94         "\tspecifying the size of RAW initrd.\n"
  95 #if defined(CONFIG_OF_LIBFDT)
  96         "\tWhen booting a Linux kernel which requires a flat device-tree\n"
  97         "\ta third argument is required which is the address of the\n"
  98         "\tdevice-tree blob. To boot that kernel without an initrd image,\n"
  99         "\tuse a '-' for the second argument. If you do not pass a third\n"
 100         "\ta bd_info struct will be passed instead\n"
 101 #endif
 102         "";
 103 #endif
 104
 105 U_BOOT_CMD(
 106         bootz,  CONFIG_SYS_MAXARGS,     1,      do_bootz,
 107         "boot Linux zImage image from memory", bootz_help_text
 108 );