cmd/bootz.c

   1 /*
   2  * (C) Copyright 2000-2009
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <bootm.h>
  10 #include <command.h>
  11 #include <lmb.h>
  12 #include <linux/compiler.h>
  13
  14 int __weak bootz_setup(ulong image, ulong *start, ulong *end)
  15 {
  16         /* Please define bootz_setup() for your platform */
  17
  18         puts("Your platform's zImage format isn't supported yet!\n");
  19         return -1;
  20 }
  21
  22 /*
  23  * zImage booting support
  24  */
  25 static int bootz_start(cmd_tbl_t *cmdtp, int flag, int argc,
  26                         char * const argv[], bootm_headers_t *images)
  27 {
  28         int ret;
  29         ulong zi_start, zi_end;
  30
  31         ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
  32                               images, 1);
  33
  34         /* Setup Linux kernel zImage entry point */
  35         if (!argc) {
  36                 images->ep = load_addr;
  37                 debug("*  kernel: default image load address = 0x%08lx\n",
  38                                 load_addr);
  39         } else {
  40                 images->ep = simple_strtoul(argv[0], NULL, 16);
  41                 debug("*  kernel: cmdline image address = 0x%08lx\n",
  42                         images->ep);
  43         }
  44
  45         ret = bootz_setup(images->ep, &zi_start, &zi_end);
  46         if (ret != 0)
  47                 return 1;
  48
  49         lmb_reserve(&images->lmb, images->ep, zi_end - zi_start);
  50
  51         /*
  52          * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
  53          * have a header that provide this informaiton.
  54          */
  55         if (bootm_find_images(flag, argc, argv))
  56                 return 1;
  57
  58         return 0;
  59 }
  60
  61 int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  62 {
  63         int ret;
  64
  65         /* Consume 'bootz' */
  66         argc--; argv++;
  67
  68         if (bootz_start(cmdtp, flag, argc, argv, &images))
  69                 return 1;
  70
  71         /*
  72          * We are doing the BOOTM_STATE_LOADOS state ourselves, so must
  73          * disable interrupts ourselves
  74          */
  75         bootm_disable_interrupts();
  76
  77         images.os.os = IH_OS_LINUX;
  78         ret = do_bootm_states(cmdtp, flag, argc, argv,
  79 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
  80                               BOOTM_STATE_RAMDISK |
  81 #endif
  82                               BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
  83                               BOOTM_STATE_OS_GO,
  84                               &images, 1);
  85
  86         return ret;
  87 }
  88
  89 #ifdef CONFIG_SYS_LONGHELP
  90 static char bootz_help_text[] =
  91         "[addr [initrd[:size]] [fdt]]\n"
  92         "    - boot Linux zImage stored in memory\n"
  93         "\tThe argument 'initrd' is optional and specifies the address\n"
  94         "\tof the initrd in memory. The optional argument ':size' allows\n"
  95         "\tspecifying the size of RAW initrd.\n"
  96 #if defined(CONFIG_OF_LIBFDT)
  97         "\tWhen booting a Linux kernel which requires a flat device-tree\n"
  98         "\ta third argument is required which is the address of the\n"
  99         "\tdevice-tree blob. To boot that kernel without an initrd image,\n"
 100         "\tuse a '-' for the second argument. If you do not pass a third\n"
 101         "\ta bd_info struct will be passed instead\n"
 102 #endif
 103         "";
 104 #endif
 105
 106 U_BOOT_CMD(
 107         bootz,  CONFIG_SYS_MAXARGS,     1,      do_bootz,
 108         "boot Linux zImage image from memory", bootz_help_text
 109 );