git.sur5r.net Git - u-boot/blob - arch/sandbox/lib/bootm.c

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