cmd/booti.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 <image.h>
  12 #include <lmb.h>
  13 #include <mapmem.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 /* See Documentation/arm64/booting.txt in the Linux kernel */
  18 struct Image_header {
  19         uint32_t        code0;          /* Executable code */
  20         uint32_t        code1;          /* Executable code */
  21         uint64_t        text_offset;    /* Image load offset, LE */
  22         uint64_t        image_size;     /* Effective Image size, LE */
  23         uint64_t        res1;           /* reserved */
  24         uint64_t        res2;           /* reserved */
  25         uint64_t        res3;           /* reserved */
  26         uint64_t        res4;           /* reserved */
  27         uint32_t        magic;          /* Magic number */
  28         uint32_t        res5;
  29 };
  30
  31 #define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
  32
  33 static int booti_setup(bootm_headers_t *images)
  34 {
  35         struct Image_header *ih;
  36         uint64_t dst;
  37         uint64_t image_size;
  38
  39         ih = (struct Image_header *)map_sysmem(images->ep, 0);
  40
  41         if (ih->magic != le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC)) {
  42                 puts("Bad Linux ARM64 Image magic!\n");
  43                 return 1;
  44         }
  45
  46         if (ih->image_size == 0) {
  47                 puts("Image lacks image_size field, assuming 16MiB\n");
  48                 image_size = 16 << 20;
  49         } else {
  50                 image_size = le64_to_cpu(ih->image_size);
  51         }
  52
  53         /*
  54          * If we are not at the correct run-time location, set the new
  55          * correct location and then move the image there.
  56          */
  57         dst = gd->bd->bi_dram[0].start + le64_to_cpu(ih->text_offset);
  58
  59         unmap_sysmem(ih);
  60
  61         if (images->ep != dst) {
  62                 void *src;
  63
  64                 debug("Moving Image from 0x%lx to 0x%llx\n", images->ep, dst);
  65
  66                 src = (void *)images->ep;
  67                 images->ep = dst;
  68                 memmove((void *)dst, src, image_size);
  69         }
  70
  71         return 0;
  72 }
  73
  74 /*
  75  * Image booting support
  76  */
  77 static int booti_start(cmd_tbl_t *cmdtp, int flag, int argc,
  78                         char * const argv[], bootm_headers_t *images)
  79 {
  80         int ret;
  81         struct Image_header *ih;
  82
  83         ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
  84                               images, 1);
  85
  86         /* Setup Linux kernel Image entry point */
  87         if (!argc) {
  88                 images->ep = load_addr;
  89                 debug("*  kernel: default image load address = 0x%08lx\n",
  90                                 load_addr);
  91         } else {
  92                 images->ep = simple_strtoul(argv[0], NULL, 16);
  93                 debug("*  kernel: cmdline image address = 0x%08lx\n",
  94                         images->ep);
  95         }
  96
  97         ret = booti_setup(images);
  98         if (ret != 0)
  99                 return 1;
 100
 101         ih = (struct Image_header *)map_sysmem(images->ep, 0);
 102
 103         lmb_reserve(&images->lmb, images->ep, le32_to_cpu(ih->image_size));
 104
 105         unmap_sysmem(ih);
 106
 107         /*
 108          * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
 109          * have a header that provide this informaiton.
 110          */
 111         if (bootm_find_images(flag, argc, argv))
 112                 return 1;
 113
 114         return 0;
 115 }
 116
 117 int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 118 {
 119         int ret;
 120
 121         /* Consume 'booti' */
 122         argc--; argv++;
 123
 124         if (booti_start(cmdtp, flag, argc, argv, &images))
 125                 return 1;
 126
 127         /*
 128          * We are doing the BOOTM_STATE_LOADOS state ourselves, so must
 129          * disable interrupts ourselves
 130          */
 131         bootm_disable_interrupts();
 132
 133         images.os.os = IH_OS_LINUX;
 134         ret = do_bootm_states(cmdtp, flag, argc, argv,
 135                               BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
 136                               BOOTM_STATE_OS_GO,
 137                               &images, 1);
 138
 139         return ret;
 140 }
 141
 142 #ifdef CONFIG_SYS_LONGHELP
 143 static char booti_help_text[] =
 144         "[addr [initrd[:size]] [fdt]]\n"
 145         "    - boot arm64 Linux Image stored in memory\n"
 146         "\tThe argument 'initrd' is optional and specifies the address\n"
 147         "\tof an initrd in memory. The optional parameter ':size' allows\n"
 148         "\tspecifying the size of a RAW initrd.\n"
 149 #if defined(CONFIG_OF_LIBFDT)
 150         "\tSince booting a Linux kernel requires a flat device-tree, a\n"
 151         "\tthird argument providing the address of the device-tree blob\n"
 152         "\tis required. To boot a kernel with a device-tree blob but\n"
 153         "\twithout an initrd image, use a '-' for the initrd argument.\n"
 154 #endif
 155         "";
 156 #endif
 157
 158 U_BOOT_CMD(
 159         booti,  CONFIG_SYS_MAXARGS,     1,      do_booti,
 160         "boot arm64 Linux Image image from memory", booti_help_text
 161 );