text: // SPDX-License-Identifier: GPL-2.0+
  /*
   * Copyright (c) 2011 The Chromium OS Authors.
   * Copyright (c) 2015 Sjoerd Simons <sjoerd.simons@collabora.co.uk>
   */
  
  #include <common.h>
  #include <bootstage.h>
  #include <image.h>
  #include <asm/io.h>
  
  #define	LINUX_ARM_ZIMAGE_MAGIC	0x016f2818
  
  struct arm_z_header {
  	uint32_t	code[9];
  	uint32_t	zi_magic;
  	uint32_t	zi_start;
  	uint32_t	zi_end;
  } __attribute__ ((__packed__));
  
  int bootz_setup(ulong image, ulong *start, ulong *end)
  {
  	uint8_t *zimage = map_sysmem(image, 0);
  	struct arm_z_header *arm_hdr = (struct arm_z_header *)zimage;
  	int ret = 0;
  
  	if (memcmp(zimage + 0x202, "HdrS", 4) == 0) {
  		uint8_t setup_sects = *(zimage + 0x1f1);
  		uint32_t syssize =
  			le32_to_cpu(*(uint32_t *)(zimage + 0x1f4));
  
  		*start = 0;
  		*end = (setup_sects + 1) * 512 + syssize * 16;
  
  		printf("setting up X86 zImage [ %ld - %ld ]\n",
  		       *start, *end);
  	} else if (le32_to_cpu(arm_hdr->zi_magic) == LINUX_ARM_ZIMAGE_MAGIC) {
  		*start = le32_to_cpu(arm_hdr->zi_start);
  		*end = le32_to_cpu(arm_hdr->zi_end);
  
  		printf("setting up ARM zImage [ %ld - %ld ]\n",
  		       *start, *end);
  	} else {
  		printf("Unrecognized zImage\n");
  		ret = 1;
  	}
  
  	unmap_sysmem((void *)image);
  
  	return ret;
  }
  
  int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  {
  	if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
  		bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  		printf("## Transferring control to Linux (at address %08lx)...\n",
  		       images->ep);
  		printf("sandbox: continuing, as we cannot run Linux\n");
  	}
  
  	return 0;
  }
  