boot/bootm_os.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2009
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  */

 #include <common.h>
 #include <bootm.h>
 #include <bootstage.h>
 #include <cpu_func.h>
 #include <efi_loader.h>
 #include <env.h>
 #include <fdt_support.h>
 #include <image.h>
 #include <lmb.h>
 #include <log.h>
 #include <asm/global_data.h>
 #include <linux/libfdt.h>
 #include <malloc.h>
 #include <mapmem.h>
 #include <vxworks.h>
 #include <tee/optee.h>

 DECLARE_GLOBAL_DATA_PTR;

 static int do_bootm_standalone(int flag, int argc, char *const argv[],
 			       struct bootm_headers *images)
 {
 	int (*appl)(int, char *const[]);

 	if (!env_get_autostart()) {
 		env_set_hex("filesize", images->os.image_len);
 		return 0;
 	}
 	appl = (int (*)(int, char * const []))images->ep;
 	appl(argc, argv);
 	return 0;
 }

 /*******************************************************************/
 /* OS booting routines */
 /*******************************************************************/

 #if defined(CONFIG_BOOTM_NETBSD) || defined(CONFIG_BOOTM_PLAN9)
 static void copy_args(char *dest, int argc, char *const argv[], char delim)
 {
 	int i;

 	for (i = 0; i < argc; i++) {
 		if (i > 0)
 			*dest++ = delim;
 		strcpy(dest, argv[i]);
 		dest += strlen(argv[i]);
 	}
 }
 #endif

 static void __maybe_unused fit_unsupported_reset(const char *msg)
 {
 	if (CONFIG_IS_ENABLED(FIT_VERBOSE)) {
 		printf("! FIT images not supported for '%s' - must reset board to recover!\n",
 		       msg);
 	}
 }

 #ifdef CONFIG_BOOTM_NETBSD
 static int do_bootm_netbsd(int flag, int argc, char *const argv[],
 			   struct bootm_headers *images)
 {
 	void (*loader)(struct bd_info *bd, struct legacy_img_hdr *hdr,
 		       char *console, char *cmdline);
 	struct legacy_img_hdr *os_hdr, *hdr;
 	ulong kernel_data, kernel_len;
 	char *cmdline;

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 #if defined(CONFIG_FIT)
 	if (!images->legacy_hdr_valid) {
 		fit_unsupported_reset("NetBSD");
 		return 1;
 	}
 #endif
 	hdr = images->legacy_hdr_os;

 	/*
 	 * Booting a (NetBSD) kernel image
 	 *
 	 * This process is pretty similar to a standalone application:
 	 * The (first part of an multi-) image must be a stage-2 loader,
 	 * which in turn is responsible for loading & invoking the actual
 	 * kernel.  The only differences are the parameters being passed:
 	 * besides the board info strucure, the loader expects a command
 	 * line, the name of the console device, and (optionally) the
 	 * address of the original image header.
 	 */
 	os_hdr = NULL;
 	if (image_check_type(&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
 		image_multi_getimg(hdr, 1, &kernel_data, &kernel_len);
 		if (kernel_len)
 			os_hdr = hdr;
 	}

 	if (argc > 0) {
 		ulong len;
 		int   i;

 		for (i = 0, len = 0; i < argc; i += 1)
 			len += strlen(argv[i]) + 1;
 		cmdline = malloc(len);
 		copy_args(cmdline, argc, argv, ' ');
 	} else {
 		cmdline = env_get("bootargs");
 		if (cmdline == NULL)
 			cmdline = "";
 	}

 	loader = (void (*)(struct bd_info *, struct legacy_img_hdr *, char *, char *))images->ep;

 	printf("## Transferring control to NetBSD stage-2 loader (at address %08lx) ...\n",
 	       (ulong)loader);

 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 	/*
 	 * NetBSD Stage-2 Loader Parameters:
 	 *   arg[0]: pointer to board info data
 	 *   arg[1]: image load address
 	 *   arg[2]: char pointer to the console device to use
 	 *   arg[3]: char pointer to the boot arguments
 	 */
 	(*loader)(gd->bd, os_hdr, "", cmdline);

 	return 1;
 }
 #endif /* CONFIG_BOOTM_NETBSD*/

 #ifdef CONFIG_BOOTM_RTEMS
 static int do_bootm_rtems(int flag, int argc, char *const argv[],
 			  struct bootm_headers *images)
 {
 	void (*entry_point)(struct bd_info *);

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 #if defined(CONFIG_FIT)
 	if (!images->legacy_hdr_valid) {
 		fit_unsupported_reset("RTEMS");
 		return 1;
 	}
 #endif

 	entry_point = (void (*)(struct bd_info *))images->ep;

 	printf("## Transferring control to RTEMS (at address %08lx) ...\n",
 	       (ulong)entry_point);

 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 	/*
 	 * RTEMS Parameters:
 	 *   r3: ptr to board info data
 	 */
 	(*entry_point)(gd->bd);

 	return 1;
 }
 #endif /* CONFIG_BOOTM_RTEMS */

 #if defined(CONFIG_BOOTM_OSE)
 static int do_bootm_ose(int flag, int argc, char *const argv[],
 			struct bootm_headers *images)
 {
 	void (*entry_point)(void);

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 #if defined(CONFIG_FIT)
 	if (!images->legacy_hdr_valid) {
 		fit_unsupported_reset("OSE");
 		return 1;
 	}
 #endif

 	entry_point = (void (*)(void))images->ep;

 	printf("## Transferring control to OSE (at address %08lx) ...\n",
 	       (ulong)entry_point);

 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 	/*
 	 * OSE Parameters:
 	 *   None
 	 */
 	(*entry_point)();

 	return 1;
 }
 #endif /* CONFIG_BOOTM_OSE */

 #if defined(CONFIG_BOOTM_PLAN9)
 static int do_bootm_plan9(int flag, int argc, char *const argv[],
 			  struct bootm_headers *images)
 {
 	void (*entry_point)(void);
 	char *s;

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 #if defined(CONFIG_FIT)
 	if (!images->legacy_hdr_valid) {
 		fit_unsupported_reset("Plan 9");
 		return 1;
 	}
 #endif

 	/* See README.plan9 */
 	s = env_get("confaddr");
 	if (s != NULL) {
 		char *confaddr = (char *)hextoul(s, NULL);

 		if (argc > 0) {
 			copy_args(confaddr, argc, argv, '\n');
 		} else {
 			s = env_get("bootargs");
 			if (s != NULL)
 				strcpy(confaddr, s);
 		}
 	}

 	entry_point = (void (*)(void))images->ep;

 	printf("## Transferring control to Plan 9 (at address %08lx) ...\n",
 	       (ulong)entry_point);

 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 	/*
 	 * Plan 9 Parameters:
 	 *   None
 	 */
 	(*entry_point)();

 	return 1;
 }
 #endif /* CONFIG_BOOTM_PLAN9 */

 #if defined(CONFIG_BOOTM_VXWORKS) && \
 	(defined(CONFIG_PPC) || defined(CONFIG_ARM))

 static void do_bootvx_fdt(struct bootm_headers *images)
 {
 #if defined(CONFIG_OF_LIBFDT)
 	int ret;
 	char *bootline;
 	ulong of_size = images->ft_len;
 	char **of_flat_tree = &images->ft_addr;
 	struct lmb *lmb = &images->lmb;

 	if (*of_flat_tree) {
 		boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);

 		ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
 		if (ret)
 			return;

 		/* Update ethernet nodes */
 		fdt_fixup_ethernet(*of_flat_tree);

 		ret = fdt_add_subnode(*of_flat_tree, 0, "chosen");
 		if ((ret >= 0 || ret == -FDT_ERR_EXISTS)) {
 			bootline = env_get("bootargs");
 			if (bootline) {
 				ret = fdt_find_and_setprop(*of_flat_tree,
 						"/chosen", "bootargs",
 						bootline,
 						strlen(bootline) + 1, 1);
 				if (ret < 0) {
 					printf("## ERROR: %s : %s\n", __func__,
 					       fdt_strerror(ret));
 					return;
 				}
 			}
 		} else {
 			printf("## ERROR: %s : %s\n", __func__,
 			       fdt_strerror(ret));
 			return;
 		}
 	}
 #endif

 	boot_prep_vxworks(images);

 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 #if defined(CONFIG_OF_LIBFDT)
 	printf("## Starting vxWorks at 0x%08lx, device tree at 0x%08lx ...\n",
 	       (ulong)images->ep, (ulong)*of_flat_tree);
 #else
 	printf("## Starting vxWorks at 0x%08lx\n", (ulong)images->ep);
 #endif
 	flush();

 	boot_jump_vxworks(images);

 	puts("## vxWorks terminated\n");
 }

 static int do_bootm_vxworks_legacy(int flag, int argc, char *const argv[],
 				   struct bootm_headers *images)
 {
 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 	do_bootvx_fdt(images);

 	return 1;
 }

 int do_bootm_vxworks(int flag, int argc, char *const argv[],
 		     struct bootm_headers *images)
 {
 	char *bootargs;
 	int pos;
 	unsigned long vxflags;
 	bool std_dtb = false;

 	/* get bootargs env */
 	bootargs = env_get("bootargs");

 	if (bootargs != NULL) {
 		for (pos = 0; pos < strlen(bootargs); pos++) {
 			/* find f=0xnumber flag */
 			if ((bootargs[pos] == '=') && (pos >= 1) &&
 			    (bootargs[pos - 1] == 'f')) {
 				vxflags = hextoul(&bootargs[pos + 1], NULL);
 				if (vxflags & VXWORKS_SYSFLG_STD_DTB)
 					std_dtb = true;
 			}
 		}
 	}

 	if (std_dtb) {
 		if (flag & BOOTM_STATE_OS_PREP)
 			printf("   Using standard DTB\n");
 		return do_bootm_linux(flag, argc, argv, images);
 	} else {
 		if (flag & BOOTM_STATE_OS_PREP)
 			printf("   !!! WARNING !!! Using legacy DTB\n");
 		return do_bootm_vxworks_legacy(flag, argc, argv, images);
 	}
 }
 #endif

 #if defined(CONFIG_CMD_ELF)
 static int do_bootm_qnxelf(int flag, int argc, char *const argv[],
 			   struct bootm_headers *images)
 {
 	char *local_args[2];
 	char str[16];
 	int dcache;

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 #if defined(CONFIG_FIT)
 	if (!images->legacy_hdr_valid) {
 		fit_unsupported_reset("QNX");
 		return 1;
 	}
 #endif

 	sprintf(str, "%lx", images->ep); /* write entry-point into string */
 	local_args[0] = argv[0];
 	local_args[1] = str;	/* and provide it via the arguments */

 	/*
 	 * QNX images require the data cache is disabled.
 	 */
 	dcache = dcache_status();
 	if (dcache)
 		dcache_disable();

 	do_bootelf(NULL, 0, 2, local_args);

 	if (dcache)
 		dcache_enable();

 	return 1;
 }
 #endif

 #ifdef CONFIG_INTEGRITY
 static int do_bootm_integrity(int flag, int argc, char *const argv[],
 			      struct bootm_headers *images)
 {
 	void (*entry_point)(void);

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 #if defined(CONFIG_FIT)
 	if (!images->legacy_hdr_valid) {
 		fit_unsupported_reset("INTEGRITY");
 		return 1;
 	}
 #endif

 	entry_point = (void (*)(void))images->ep;

 	printf("## Transferring control to INTEGRITY (at address %08lx) ...\n",
 	       (ulong)entry_point);

 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 	/*
 	 * INTEGRITY Parameters:
 	 *   None
 	 */
 	(*entry_point)();

 	return 1;
 }
 #endif

 #ifdef CONFIG_BOOTM_OPENRTOS
 static int do_bootm_openrtos(int flag, int argc, char *const argv[],
 			     struct bootm_headers *images)
 {
 	void (*entry_point)(void);

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 	entry_point = (void (*)(void))images->ep;

 	printf("## Transferring control to OpenRTOS (at address %08lx) ...\n",
 		(ulong)entry_point);

 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 	/*
 	 * OpenRTOS Parameters:
 	 *   None
 	 */
 	(*entry_point)();

 	return 1;
 }
 #endif

 #ifdef CONFIG_BOOTM_OPTEE
 static int do_bootm_tee(int flag, int argc, char *const argv[],
 			struct bootm_headers *images)
 {
 	int ret;

 	/* Verify OS type */
 	if (images->os.os != IH_OS_TEE) {
 		return 1;
 	};

 	/* Validate OPTEE header */
 	ret = optee_verify_bootm_image(images->os.image_start,
 				       images->os.load,
 				       images->os.image_len);
 	if (ret)
 		return ret;

 	/* Locate FDT etc */
 	ret = bootm_find_images(flag, argc, argv, 0, 0);
 	if (ret)
 		return ret;

 	/* From here we can run the regular linux boot path */
 	return do_bootm_linux(flag, argc, argv, images);
 }
 #endif

 #ifdef CONFIG_BOOTM_EFI
 static int do_bootm_efi(int flag, int argc, char *const argv[],
 			struct bootm_headers *images)
 {
 	int ret;
 	efi_status_t efi_ret;
 	void *image_buf;

 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;

 	/* Locate FDT, if provided */
 	ret = bootm_find_images(flag, argc, argv, 0, 0);
 	if (ret)
 		return ret;

 	/* Initialize EFI drivers */
 	efi_ret = efi_init_obj_list();
 	if (efi_ret != EFI_SUCCESS) {
 		printf("## Failed to initialize UEFI sub-system: r = %lu\n",
 		       efi_ret & ~EFI_ERROR_MASK);
 		return 1;
 	}

 	/* Install device tree */
 	efi_ret = efi_install_fdt(images->ft_len
 				  ? images->ft_addr : EFI_FDT_USE_INTERNAL);
 	if (efi_ret != EFI_SUCCESS) {
 		printf("## Failed to install device tree: r = %lu\n",
 		       efi_ret & ~EFI_ERROR_MASK);
 		return 1;
 	}

 	/* Run EFI image */
 	printf("## Transferring control to EFI (at address %08lx) ...\n",
 	       images->ep);
 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

 	/* We expect to return */
 	images->os.type = IH_TYPE_STANDALONE;

 	image_buf = map_sysmem(images->ep, images->os.image_len);

 	efi_ret = efi_run_image(image_buf, images->os.image_len);
 	if (efi_ret != EFI_SUCCESS)
 		return 1;
 	return 0;
 }
 #endif

 static boot_os_fn *boot_os[] = {
 	[IH_OS_U_BOOT] = do_bootm_standalone,
 #ifdef CONFIG_BOOTM_LINUX
 	[IH_OS_LINUX] = do_bootm_linux,
 #endif
 #ifdef CONFIG_BOOTM_NETBSD
 	[IH_OS_NETBSD] = do_bootm_netbsd,
 #endif
 #ifdef CONFIG_BOOTM_RTEMS
 	[IH_OS_RTEMS] = do_bootm_rtems,
 #endif
 #if defined(CONFIG_BOOTM_OSE)
 	[IH_OS_OSE] = do_bootm_ose,
 #endif
 #if defined(CONFIG_BOOTM_PLAN9)
 	[IH_OS_PLAN9] = do_bootm_plan9,
 #endif
 #if defined(CONFIG_BOOTM_VXWORKS) && \
 	(defined(CONFIG_PPC) || defined(CONFIG_ARM) || defined(CONFIG_RISCV))
 	[IH_OS_VXWORKS] = do_bootm_vxworks,
 #endif
 #if defined(CONFIG_CMD_ELF)
 	[IH_OS_QNX] = do_bootm_qnxelf,
 #endif
 #ifdef CONFIG_INTEGRITY
 	[IH_OS_INTEGRITY] = do_bootm_integrity,
 #endif
 #ifdef CONFIG_BOOTM_OPENRTOS
 	[IH_OS_OPENRTOS] = do_bootm_openrtos,
 #endif
 #ifdef CONFIG_BOOTM_OPTEE
 	[IH_OS_TEE] = do_bootm_tee,
 #endif
 #ifdef CONFIG_BOOTM_EFI
 	[IH_OS_EFI] = do_bootm_efi,
 #endif
 };

 /* Allow for arch specific config before we boot */
 __weak void arch_preboot_os(void)
 {
 	/* please define platform specific arch_preboot_os() */
 }

 /* Allow for board specific config before we boot */
 __weak void board_preboot_os(void)
 {
 	/* please define board specific board_preboot_os() */
 }

 int boot_selected_os(int argc, char *const argv[], int state,
 		     struct bootm_headers *images, boot_os_fn *boot_fn)
 {
 	arch_preboot_os();
 	board_preboot_os();
 	boot_fn(state, argc, argv, images);

 	/* Stand-alone may return when 'autostart' is 'no' */
 	if (images->os.type == IH_TYPE_STANDALONE ||
 	    IS_ENABLED(CONFIG_SANDBOX) ||
 	    state == BOOTM_STATE_OS_FAKE_GO) /* We expect to return */
 		return 0;
 	bootstage_error(BOOTSTAGE_ID_BOOT_OS_RETURNED);
 	debug("\n## Control returned to monitor - resetting...\n");

 	return BOOTM_ERR_RESET;
 }

 boot_os_fn *bootm_os_get_boot_func(int os)
 {
 	return boot_os[os];
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* (C) Copyright 2000-2009
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*/

	#include <common.h>
	#include <bootm.h>
	#include <bootstage.h>
	#include <cpu_func.h>
	#include <efi_loader.h>
	#include <env.h>
	#include <fdt_support.h>
	#include <image.h>
	#include <lmb.h>
	#include <log.h>
	#include <asm/global_data.h>
	#include <linux/libfdt.h>
	#include <malloc.h>
	#include <mapmem.h>
	#include <vxworks.h>
	#include <tee/optee.h>

	DECLARE_GLOBAL_DATA_PTR;

	static int do_bootm_standalone(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	int (appl)(int, char const[]);

	if (!env_get_autostart()) {
	env_set_hex("filesize", images->os.image_len);
	return 0;
	}
	appl = (int ()(int, char const []))images->ep;
	appl(argc, argv);
	return 0;
	}

	/*******************************************************************/
	/* OS booting routines */
	/*******************************************************************/

	#if defined(CONFIG_BOOTM_NETBSD) \|\| defined(CONFIG_BOOTM_PLAN9)
	static void copy_args(char dest, int argc, char const argv[], char delim)
	{
	int i;

	for (i = 0; i < argc; i++) {
	if (i > 0)
	*dest++ = delim;
	strcpy(dest, argv[i]);
	dest += strlen(argv[i]);
	}
	}
	#endif

	static void __maybe_unused fit_unsupported_reset(const char *msg)
	{
	if (CONFIG_IS_ENABLED(FIT_VERBOSE)) {
	printf("! FIT images not supported for '%s' - must reset board to recover!\n",
	msg);
	}
	}

	#ifdef CONFIG_BOOTM_NETBSD
	static int do_bootm_netbsd(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	void (loader)(struct bd_info bd, struct legacy_img_hdr *hdr,
	char console, char cmdline);
	struct legacy_img_hdr os_hdr, hdr;
	ulong kernel_data, kernel_len;
	char *cmdline;

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
	fit_unsupported_reset("NetBSD");
	return 1;
	}
	#endif
	hdr = images->legacy_hdr_os;

	/*
	* Booting a (NetBSD) kernel image
	*
	* This process is pretty similar to a standalone application:
	* The (first part of an multi-) image must be a stage-2 loader,
	* which in turn is responsible for loading & invoking the actual
	* kernel. The only differences are the parameters being passed:
	* besides the board info strucure, the loader expects a command
	* line, the name of the console device, and (optionally) the
	* address of the original image header.
	*/
	os_hdr = NULL;
	if (image_check_type(&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
	image_multi_getimg(hdr, 1, &kernel_data, &kernel_len);
	if (kernel_len)
	os_hdr = hdr;
	}

	if (argc > 0) {
	ulong len;
	int i;

	for (i = 0, len = 0; i < argc; i += 1)
	len += strlen(argv[i]) + 1;
	cmdline = malloc(len);
	copy_args(cmdline, argc, argv, ' ');
	} else {
	cmdline = env_get("bootargs");
	if (cmdline == NULL)
	cmdline = "";
	}

	loader = (void ()(struct bd_info , struct legacy_img_hdr , char , char *))images->ep;

	printf("## Transferring control to NetBSD stage-2 loader (at address %08lx) ...\n",
	(ulong)loader);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	/*
	* NetBSD Stage-2 Loader Parameters:
	* arg[0]: pointer to board info data
	* arg[1]: image load address
	* arg[2]: char pointer to the console device to use
	* arg[3]: char pointer to the boot arguments
	*/
	(*loader)(gd->bd, os_hdr, "", cmdline);

	return 1;
	}
	#endif /* CONFIG_BOOTM_NETBSD*/

	#ifdef CONFIG_BOOTM_RTEMS
	static int do_bootm_rtems(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	void (entry_point)(struct bd_info );

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
	fit_unsupported_reset("RTEMS");
	return 1;
	}
	#endif

	entry_point = (void ()(struct bd_info ))images->ep;

	printf("## Transferring control to RTEMS (at address %08lx) ...\n",
	(ulong)entry_point);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	/*
	* RTEMS Parameters:
	* r3: ptr to board info data
	*/
	(*entry_point)(gd->bd);

	return 1;
	}
	#endif /* CONFIG_BOOTM_RTEMS */

	#if defined(CONFIG_BOOTM_OSE)
	static int do_bootm_ose(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	void (*entry_point)(void);

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
	fit_unsupported_reset("OSE");
	return 1;
	}
	#endif

	entry_point = (void (*)(void))images->ep;

	printf("## Transferring control to OSE (at address %08lx) ...\n",
	(ulong)entry_point);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	/*
	* OSE Parameters:
	* None
	*/
	(*entry_point)();

	return 1;
	}
	#endif /* CONFIG_BOOTM_OSE */

	#if defined(CONFIG_BOOTM_PLAN9)
	static int do_bootm_plan9(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	void (*entry_point)(void);
	char *s;

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
	fit_unsupported_reset("Plan 9");
	return 1;
	}
	#endif

	/* See README.plan9 */
	s = env_get("confaddr");
	if (s != NULL) {
	char confaddr = (char )hextoul(s, NULL);

	if (argc > 0) {
	copy_args(confaddr, argc, argv, '\n');
	} else {
	s = env_get("bootargs");
	if (s != NULL)
	strcpy(confaddr, s);
	}
	}

	entry_point = (void (*)(void))images->ep;

	printf("## Transferring control to Plan 9 (at address %08lx) ...\n",
	(ulong)entry_point);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	/*
	* Plan 9 Parameters:
	* None
	*/
	(*entry_point)();

	return 1;
	}
	#endif /* CONFIG_BOOTM_PLAN9 */

	#if defined(CONFIG_BOOTM_VXWORKS) && \
	(defined(CONFIG_PPC) \|\| defined(CONFIG_ARM))

	static void do_bootvx_fdt(struct bootm_headers *images)
	{
	#if defined(CONFIG_OF_LIBFDT)
	int ret;
	char *bootline;
	ulong of_size = images->ft_len;
	char **of_flat_tree = &images->ft_addr;
	struct lmb *lmb = &images->lmb;

	if (*of_flat_tree) {
	boot_fdt_add_mem_rsv_regions(lmb, *of_flat_tree);

	ret = boot_relocate_fdt(lmb, of_flat_tree, &of_size);
	if (ret)
	return;

	/* Update ethernet nodes */
	fdt_fixup_ethernet(*of_flat_tree);

	ret = fdt_add_subnode(*of_flat_tree, 0, "chosen");
	if ((ret >= 0 \|\| ret == -FDT_ERR_EXISTS)) {
	bootline = env_get("bootargs");
	if (bootline) {
	ret = fdt_find_and_setprop(*of_flat_tree,
	"/chosen", "bootargs",
	bootline,
	strlen(bootline) + 1, 1);
	if (ret < 0) {
	printf("## ERROR: %s : %s\n", __func__,
	fdt_strerror(ret));
	return;
	}
	}
	} else {
	printf("## ERROR: %s : %s\n", __func__,
	fdt_strerror(ret));
	return;
	}
	}
	#endif

	boot_prep_vxworks(images);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	#if defined(CONFIG_OF_LIBFDT)
	printf("## Starting vxWorks at 0x%08lx, device tree at 0x%08lx ...\n",
	(ulong)images->ep, (ulong)*of_flat_tree);
	#else
	printf("## Starting vxWorks at 0x%08lx\n", (ulong)images->ep);
	#endif
	flush();

	boot_jump_vxworks(images);

	puts("## vxWorks terminated\n");
	}

	static int do_bootm_vxworks_legacy(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	do_bootvx_fdt(images);

	return 1;
	}

	int do_bootm_vxworks(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	char *bootargs;
	int pos;
	unsigned long vxflags;
	bool std_dtb = false;

	/* get bootargs env */
	bootargs = env_get("bootargs");

	if (bootargs != NULL) {
	for (pos = 0; pos < strlen(bootargs); pos++) {
	/* find f=0xnumber flag */
	if ((bootargs[pos] == '=') && (pos >= 1) &&
	(bootargs[pos - 1] == 'f')) {
	vxflags = hextoul(&bootargs[pos + 1], NULL);
	if (vxflags & VXWORKS_SYSFLG_STD_DTB)
	std_dtb = true;
	}
	}
	}

	if (std_dtb) {
	if (flag & BOOTM_STATE_OS_PREP)
	printf(" Using standard DTB\n");
	return do_bootm_linux(flag, argc, argv, images);
	} else {
	if (flag & BOOTM_STATE_OS_PREP)
	printf(" !!! WARNING !!! Using legacy DTB\n");
	return do_bootm_vxworks_legacy(flag, argc, argv, images);
	}
	}
	#endif

	#if defined(CONFIG_CMD_ELF)
	static int do_bootm_qnxelf(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	char *local_args[2];
	char str[16];
	int dcache;

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
	fit_unsupported_reset("QNX");
	return 1;
	}
	#endif

	sprintf(str, "%lx", images->ep); /* write entry-point into string */
	local_args[0] = argv[0];
	local_args[1] = str; /* and provide it via the arguments */

	/*
	* QNX images require the data cache is disabled.
	*/
	dcache = dcache_status();
	if (dcache)
	dcache_disable();

	do_bootelf(NULL, 0, 2, local_args);

	if (dcache)
	dcache_enable();

	return 1;
	}
	#endif

	#ifdef CONFIG_INTEGRITY
	static int do_bootm_integrity(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	void (*entry_point)(void);

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
	fit_unsupported_reset("INTEGRITY");
	return 1;
	}
	#endif

	entry_point = (void (*)(void))images->ep;

	printf("## Transferring control to INTEGRITY (at address %08lx) ...\n",
	(ulong)entry_point);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	/*
	* INTEGRITY Parameters:
	* None
	*/
	(*entry_point)();

	return 1;
	}
	#endif

	#ifdef CONFIG_BOOTM_OPENRTOS
	static int do_bootm_openrtos(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	void (*entry_point)(void);

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	entry_point = (void (*)(void))images->ep;

	printf("## Transferring control to OpenRTOS (at address %08lx) ...\n",
	(ulong)entry_point);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	/*
	* OpenRTOS Parameters:
	* None
	*/
	(*entry_point)();

	return 1;
	}
	#endif

	#ifdef CONFIG_BOOTM_OPTEE
	static int do_bootm_tee(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	int ret;

	/* Verify OS type */
	if (images->os.os != IH_OS_TEE) {
	return 1;
	};

	/* Validate OPTEE header */
	ret = optee_verify_bootm_image(images->os.image_start,
	images->os.load,
	images->os.image_len);
	if (ret)
	return ret;

	/* Locate FDT etc */
	ret = bootm_find_images(flag, argc, argv, 0, 0);
	if (ret)
	return ret;

	/* From here we can run the regular linux boot path */
	return do_bootm_linux(flag, argc, argv, images);
	}
	#endif

	#ifdef CONFIG_BOOTM_EFI
	static int do_bootm_efi(int flag, int argc, char *const argv[],
	struct bootm_headers *images)
	{
	int ret;
	efi_status_t efi_ret;
	void *image_buf;

	if (flag != BOOTM_STATE_OS_GO)
	return 0;

	/* Locate FDT, if provided */
	ret = bootm_find_images(flag, argc, argv, 0, 0);
	if (ret)
	return ret;

	/* Initialize EFI drivers */
	efi_ret = efi_init_obj_list();
	if (efi_ret != EFI_SUCCESS) {
	printf("## Failed to initialize UEFI sub-system: r = %lu\n",
	efi_ret & ~EFI_ERROR_MASK);
	return 1;
	}

	/* Install device tree */
	efi_ret = efi_install_fdt(images->ft_len
	? images->ft_addr : EFI_FDT_USE_INTERNAL);
	if (efi_ret != EFI_SUCCESS) {
	printf("## Failed to install device tree: r = %lu\n",
	efi_ret & ~EFI_ERROR_MASK);
	return 1;
	}

	/* Run EFI image */
	printf("## Transferring control to EFI (at address %08lx) ...\n",
	images->ep);
	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

	/* We expect to return */
	images->os.type = IH_TYPE_STANDALONE;

	image_buf = map_sysmem(images->ep, images->os.image_len);

	efi_ret = efi_run_image(image_buf, images->os.image_len);
	if (efi_ret != EFI_SUCCESS)
	return 1;
	return 0;
	}
	#endif

	static boot_os_fn *boot_os[] = {
	[IH_OS_U_BOOT] = do_bootm_standalone,
	#ifdef CONFIG_BOOTM_LINUX
	[IH_OS_LINUX] = do_bootm_linux,
	#endif
	#ifdef CONFIG_BOOTM_NETBSD
	[IH_OS_NETBSD] = do_bootm_netbsd,
	#endif
	#ifdef CONFIG_BOOTM_RTEMS
	[IH_OS_RTEMS] = do_bootm_rtems,
	#endif
	#if defined(CONFIG_BOOTM_OSE)
	[IH_OS_OSE] = do_bootm_ose,
	#endif
	#if defined(CONFIG_BOOTM_PLAN9)
	[IH_OS_PLAN9] = do_bootm_plan9,
	#endif
	#if defined(CONFIG_BOOTM_VXWORKS) && \
	(defined(CONFIG_PPC) \|\| defined(CONFIG_ARM) \|\| defined(CONFIG_RISCV))
	[IH_OS_VXWORKS] = do_bootm_vxworks,
	#endif
	#if defined(CONFIG_CMD_ELF)
	[IH_OS_QNX] = do_bootm_qnxelf,
	#endif
	#ifdef CONFIG_INTEGRITY
	[IH_OS_INTEGRITY] = do_bootm_integrity,
	#endif
	#ifdef CONFIG_BOOTM_OPENRTOS
	[IH_OS_OPENRTOS] = do_bootm_openrtos,
	#endif
	#ifdef CONFIG_BOOTM_OPTEE
	[IH_OS_TEE] = do_bootm_tee,
	#endif
	#ifdef CONFIG_BOOTM_EFI
	[IH_OS_EFI] = do_bootm_efi,
	#endif
	};

	/* Allow for arch specific config before we boot */
	__weak void arch_preboot_os(void)
	{
	/* please define platform specific arch_preboot_os() */
	}

	/* Allow for board specific config before we boot */
	__weak void board_preboot_os(void)
	{
	/* please define board specific board_preboot_os() */
	}

	int boot_selected_os(int argc, char *const argv[], int state,
	struct bootm_headers images, boot_os_fn boot_fn)
	{
	arch_preboot_os();
	board_preboot_os();
	boot_fn(state, argc, argv, images);

	/* Stand-alone may return when 'autostart' is 'no' */
	if (images->os.type == IH_TYPE_STANDALONE \|\|
	IS_ENABLED(CONFIG_SANDBOX) \|\|
	state == BOOTM_STATE_OS_FAKE_GO) /* We expect to return */
	return 0;
	bootstage_error(BOOTSTAGE_ID_BOOT_OS_RETURNED);
	debug("\n## Control returned to monitor - resetting...\n");

	return BOOTM_ERR_RESET;
	}

	boot_os_fn *bootm_os_get_boot_func(int os)
	{
	return boot_os[os];
	}