arch/sandbox/lib/bootm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2011 The Chromium OS Authors.
   4  * Copyright (c) 2015 Sjoerd Simons <sjoerd.simons@collabora.co.uk>
   5  */
   6
   7 #include <common.h>
   8 #include <bootstage.h>
   9 #include <image.h>
  10 #include <asm/io.h>
  11
  12 #define LINUX_ARM_ZIMAGE_MAGIC  0x016f2818
  13
  14 struct arm_z_header {
  15         uint32_t        code[9];
  16         uint32_t        zi_magic;
  17         uint32_t        zi_start;
  18         uint32_t        zi_end;
  19 } __attribute__ ((__packed__));
  20
  21 int bootz_setup(ulong image, ulong *start, ulong *end)
  22 {
  23         uint8_t *zimage = map_sysmem(image, 0);
  24         struct arm_z_header *arm_hdr = (struct arm_z_header *)zimage;
  25         int ret = 0;
  26
  27         if (memcmp(zimage + 0x202, "HdrS", 4) == 0) {
  28                 uint8_t setup_sects = *(zimage + 0x1f1);
  29                 uint32_t syssize =
  30                         le32_to_cpu(*(uint32_t *)(zimage + 0x1f4));
  31
  32                 *start = 0;
  33                 *end = (setup_sects + 1) * 512 + syssize * 16;
  34
  35                 printf("setting up X86 zImage [ %ld - %ld ]\n",
  36                        *start, *end);
  37         } else if (le32_to_cpu(arm_hdr->zi_magic) == LINUX_ARM_ZIMAGE_MAGIC) {
  38                 *start = le32_to_cpu(arm_hdr->zi_start);
  39                 *end = le32_to_cpu(arm_hdr->zi_end);
  40
  41                 printf("setting up ARM zImage [ %ld - %ld ]\n",
  42                        *start, *end);
  43         } else {
  44                 printf("Unrecognized zImage\n");
  45                 ret = 1;
  46         }
  47
  48         unmap_sysmem((void *)image);
  49
  50         return ret;
  51 }
  52
  53 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  54 {
  55         if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
  56                 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  57                 printf("## Transferring control to Linux (at address %08lx)...\n",
  58                        images->ep);
  59                 printf("sandbox: continuing, as we cannot run Linux\n");
  60         }
  61
  62         return 0;
  63 }