arch/arm/mach-k3/sysfw-loader.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * K3: System Firmware Loader
  *
  * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
  *	Andreas Dannenberg <dannenberg@ti.com>
  */

 #include <common.h>
 #include <dm.h>
 #include <image.h>
 #include <log.h>
 #include <spl.h>
 #include <malloc.h>
 #include <remoteproc.h>
 #include <asm/cache.h>
 #include <linux/soc/ti/ti_sci_protocol.h>
 #include <g_dnl.h>
 #include <usb.h>
 #include <dfu.h>
 #include <dm/uclass-internal.h>
 #include <spi_flash.h>

 #include <asm/arch/sys_proto.h>
 #include "common.h"

 DECLARE_GLOBAL_DATA_PTR;

 /* Name of the FIT image nodes for SYSFW and its config data */
 #define SYSFW_FIRMWARE			"sysfw.bin"
 #define SYSFW_CFG_BOARD			"board-cfg.bin"
 #define SYSFW_CFG_PM			"pm-cfg.bin"
 #define SYSFW_CFG_RM			"rm-cfg.bin"
 #define SYSFW_CFG_SEC			"sec-cfg.bin"

 /*
  * It is assumed that remoteproc device 0 is the corresponding
  * system-controller that runs SYSFW. Make sure DT reflects the same.
  */
 #define K3_SYSTEM_CONTROLLER_RPROC_ID	0

 static bool sysfw_loaded;
 static void *sysfw_load_address;

 /*
  * Populate SPL hook to override the default load address used by the SPL
  * loader function with a custom address for SYSFW loading.
  */
 struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
 {
 	if (sysfw_loaded)
 		return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
 	else if (sysfw_load_address)
 		return sysfw_load_address;
 	else
 		panic("SYSFW load address not defined!");
 }

 /*
  * Populate SPL hook to skip the default SPL loader FIT post-processing steps
  * during SYSFW loading and return to the calling function so we can perform
  * our own custom processing.
  */
 bool spl_load_simple_fit_skip_processing(void)
 {
 	return !sysfw_loaded;
 }

 static int fit_get_data_by_name(const void *fit, int images, const char *name,
 				const void **addr, size_t *size)
 {
 	int node_offset;

 	node_offset = fdt_subnode_offset(fit, images, name);
 	if (node_offset < 0)
 		return -ENOENT;

 	return fit_image_get_data(fit, node_offset, addr, size);
 }

 static void k3_start_system_controller(int rproc_id, bool rproc_loaded,
 				       ulong addr, ulong size)
 {
 	int ret;

 	ret = rproc_dev_init(rproc_id);
 	if (ret)
 		panic("rproc failed to be initialized (%d)\n", ret);

 	if (!rproc_loaded) {
 		ret = rproc_load(rproc_id, addr, size);
 		if (ret)
 			panic("Firmware failed to start on rproc (%d)\n", ret);
 	}

 	ret = rproc_start(0);
 	if (ret)
 		panic("Firmware init failed on rproc (%d)\n", ret);
 }

 static void k3_sysfw_load_using_fit(void *fit)
 {
 	int images;
 	const void *sysfw_addr;
 	size_t sysfw_size;
 	int ret;

 	/* Find the node holding the images information */
 	images = fdt_path_offset(fit, FIT_IMAGES_PATH);
 	if (images < 0)
 		panic("Cannot find /images node (%d)\n", images);

 	/* Extract System Firmware (SYSFW) image from FIT */
 	ret = fit_get_data_by_name(fit, images, SYSFW_FIRMWARE,
 				   &sysfw_addr, &sysfw_size);
 	if (ret < 0)
 		panic("Error accessing %s node in FIT (%d)\n", SYSFW_FIRMWARE,
 		      ret);

 	/* Start up system controller firmware */
 	k3_start_system_controller(K3_SYSTEM_CONTROLLER_RPROC_ID, false,
 				   (ulong)sysfw_addr, (ulong)sysfw_size);
 }

 static void k3_sysfw_configure_using_fit(void *fit,
 					 struct ti_sci_handle *ti_sci)
 {
 	struct ti_sci_board_ops *board_ops = &ti_sci->ops.board_ops;
 	int images;
 	const void *cfg_fragment_addr;
 	size_t cfg_fragment_size;
 	int ret;

 	/* Find the node holding the images information */
 	images = fdt_path_offset(fit, FIT_IMAGES_PATH);
 	if (images < 0)
 		panic("Cannot find /images node (%d)\n", images);

 	/* Extract board configuration from FIT */
 	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_BOARD,
 				   &cfg_fragment_addr, &cfg_fragment_size);
 	if (ret < 0)
 		panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_BOARD,
 		      ret);

 	/* Apply board configuration to SYSFW */
 	ret = board_ops->board_config(ti_sci,
 				      (u64)(u32)cfg_fragment_addr,
 				      (u32)cfg_fragment_size);
 	if (ret)
 		panic("Failed to set board configuration (%d)\n", ret);

 	/* Extract power/clock (PM) specific configuration from FIT */
 	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_PM,
 				   &cfg_fragment_addr, &cfg_fragment_size);
 	if (ret < 0)
 		panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_PM,
 		      ret);

 	/* Apply power/clock (PM) specific configuration to SYSFW */
 	ret = board_ops->board_config_pm(ti_sci,
 					 (u64)(u32)cfg_fragment_addr,
 					 (u32)cfg_fragment_size);
 	if (ret)
 		panic("Failed to set board PM configuration (%d)\n", ret);

 	/* Extract resource management (RM) specific configuration from FIT */
 	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_RM,
 				   &cfg_fragment_addr, &cfg_fragment_size);
 	if (ret < 0)
 		panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_RM,
 		      ret);

 	/* Apply resource management (RM) configuration to SYSFW */
 	ret = board_ops->board_config_rm(ti_sci,
 					 (u64)(u32)cfg_fragment_addr,
 					 (u32)cfg_fragment_size);
 	if (ret)
 		panic("Failed to set board RM configuration (%d)\n", ret);

 	/* Extract security specific configuration from FIT */
 	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_SEC,
 				   &cfg_fragment_addr, &cfg_fragment_size);
 	if (ret < 0)
 		panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_SEC,
 		      ret);

 	/* Apply security configuration to SYSFW */
 	ret = board_ops->board_config_security(ti_sci,
 					       (u64)(u32)cfg_fragment_addr,
 					       (u32)cfg_fragment_size);
 	if (ret)
 		panic("Failed to set board security configuration (%d)\n",
 		      ret);
 }

 #if CONFIG_IS_ENABLED(DFU)
 static int k3_sysfw_dfu_download(void *addr)
 {
 	char dfu_str[50];
 	int ret;

 	sprintf(dfu_str, "sysfw.itb ram 0x%p 0x%x", addr,
 		CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
 	ret = dfu_config_entities(dfu_str, "ram", "0");
 	if (ret) {
 		dfu_free_entities();
 		goto exit;
 	}

 	run_usb_dnl_gadget(0, "usb_dnl_dfu");
 exit:
 	dfu_free_entities();
 	return ret;
 }
 #endif

 #if CONFIG_IS_ENABLED(SPI_LOAD)
 static void *k3_sysfw_get_spi_addr(void)
 {
 	struct udevice *dev;
 	fdt_addr_t addr;
 	int ret;

 	ret = uclass_find_device_by_seq(UCLASS_SPI, CONFIG_SF_DEFAULT_BUS,
 					&dev);
 	if (ret)
 		return NULL;

 	addr = dev_read_addr_index(dev, 1);
 	if (addr == FDT_ADDR_T_NONE)
 		return NULL;

 	return (void *)(addr + CONFIG_K3_SYSFW_IMAGE_SPI_OFFS);
 }
 #endif

 void k3_sysfw_loader(bool rom_loaded_sysfw,
 		     void (*config_pm_pre_callback)(void),
 		     void (*config_pm_done_callback)(void))
 {
 	struct spl_image_info spl_image = { 0 };
 	struct spl_boot_device bootdev = { 0 };
 	struct ti_sci_handle *ti_sci;
 	int ret = 0;

 	if (rom_loaded_sysfw) {
 		k3_start_system_controller(K3_SYSTEM_CONTROLLER_RPROC_ID,
 					   rom_loaded_sysfw, 0, 0);
 		sysfw_loaded = true;
 		return;
 	}

 	/* Reserve a block of aligned memory for loading the SYSFW image */
 	sysfw_load_address = memalign(ARCH_DMA_MINALIGN,
 				      CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
 	if (!sysfw_load_address)
 		panic("Error allocating %u bytes of memory for SYSFW image\n",
 		      CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);

 	debug("%s: allocated %u bytes at 0x%p\n", __func__,
 	      CONFIG_K3_SYSFW_IMAGE_SIZE_MAX, sysfw_load_address);

 	/* Set load address for legacy modes that bypass spl_get_load_buffer */
 	spl_image.load_addr = (uintptr_t)sysfw_load_address;

 	bootdev.boot_device = spl_boot_device();

 	/* Load combined System Controller firmware and config data image */
 	switch (bootdev.boot_device) {
 #if CONFIG_IS_ENABLED(MMC_SUPPORT)
 	case BOOT_DEVICE_MMC1:
 	case BOOT_DEVICE_MMC2:
 	case BOOT_DEVICE_MMC2_2:
 		ret = spl_mmc_load(&spl_image, &bootdev,
 #ifdef CONFIG_K3_SYSFW_IMAGE_NAME
 				   CONFIG_K3_SYSFW_IMAGE_NAME,
 #else
 				   NULL,
 #endif
 #ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART
 				   CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART,
 #else
 				   0,
 #endif
 #ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT
 				   CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT);
 #else
 				   0);
 #endif
 		break;
 #endif
 #if CONFIG_IS_ENABLED(SPI_LOAD)
 	case BOOT_DEVICE_SPI:
 		sysfw_load_address = k3_sysfw_get_spi_addr();
 		if (!sysfw_load_address)
 			ret = -ENODEV;
 		break;
 #endif
 #if CONFIG_IS_ENABLED(YMODEM_SUPPORT)
 	case BOOT_DEVICE_UART:
 #ifdef CONFIG_K3_EARLY_CONS
 		/*
 		 * Establish a serial console if not yet available as required
 		 * for UART-based boot. For this use the early console feature
 		 * that allows setting up a UART for use before SYSFW has been
 		 * brought up. Note that the associated UART module's clocks
 		 * must have gotten enabled by the ROM bootcode which will be
 		 * the case when continuing to boot serially from the same
 		 * UART that the ROM loaded the initial bootloader from.
 		 */
 		if (!gd->have_console)
 			early_console_init();
 #endif
 		ret = spl_ymodem_load_image(&spl_image, &bootdev);
 		break;
 #endif
 #if CONFIG_IS_ENABLED(DFU)
 	case BOOT_DEVICE_DFU:
 		ret = k3_sysfw_dfu_download(sysfw_load_address);
 		break;
 #endif
 #if CONFIG_IS_ENABLED(USB_STORAGE)
 	case BOOT_DEVICE_USB:
 		ret = spl_usb_load(&spl_image, &bootdev,
 				   CONFIG_SYS_USB_FAT_BOOT_PARTITION,
 #ifdef CONFIG_K3_SYSFW_IMAGE_NAME
 				   CONFIG_K3_SYSFW_IMAGE_NAME);
 #else
 				   NULL);
 #endif
 #endif
 		break;
 	default:
 		panic("Loading SYSFW image from device %u not supported!\n",
 		      bootdev.boot_device);
 	}

 	if (ret)
 		panic("Error %d occurred during loading SYSFW image!\n", ret);

 	/*
 	 * Now that SYSFW got loaded set helper flag to restore regular SPL
 	 * loader behavior so we can later boot into the next stage as expected.
 	 */
 	sysfw_loaded = true;

 	/* Ensure the SYSFW image is in FIT format */
 	if (image_get_magic((const image_header_t *)sysfw_load_address) !=
 	    FDT_MAGIC)
 		panic("SYSFW image not in FIT format!\n");

 	/* Extract and start SYSFW */
 	k3_sysfw_load_using_fit(sysfw_load_address);

 	/* Get handle for accessing SYSFW services */
 	ti_sci = get_ti_sci_handle();

 	if (config_pm_pre_callback)
 		config_pm_pre_callback();

 	/* Parse and apply the different SYSFW configuration fragments */
 	k3_sysfw_configure_using_fit(sysfw_load_address, ti_sci);

 	/*
 	 * Now that all clocks and PM aspects are setup, invoke a user-
 	 * provided callback function. Usually this callback would be used
 	 * to setup or re-configure the U-Boot console UART.
 	 */
 	if (config_pm_done_callback)
 		config_pm_done_callback();
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* K3: System Firmware Loader
	*
	* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
	* Andreas Dannenberg <dannenberg@ti.com>
	*/

	#include <common.h>
	#include <dm.h>
	#include <image.h>
	#include <log.h>
	#include <spl.h>
	#include <malloc.h>
	#include <remoteproc.h>
	#include <asm/cache.h>
	#include <linux/soc/ti/ti_sci_protocol.h>
	#include <g_dnl.h>
	#include <usb.h>
	#include <dfu.h>
	#include <dm/uclass-internal.h>
	#include <spi_flash.h>

	#include <asm/arch/sys_proto.h>
	#include "common.h"

	DECLARE_GLOBAL_DATA_PTR;

	/* Name of the FIT image nodes for SYSFW and its config data */
	#define SYSFW_FIRMWARE "sysfw.bin"
	#define SYSFW_CFG_BOARD "board-cfg.bin"
	#define SYSFW_CFG_PM "pm-cfg.bin"
	#define SYSFW_CFG_RM "rm-cfg.bin"
	#define SYSFW_CFG_SEC "sec-cfg.bin"

	/*
	* It is assumed that remoteproc device 0 is the corresponding
	* system-controller that runs SYSFW. Make sure DT reflects the same.
	*/
	#define K3_SYSTEM_CONTROLLER_RPROC_ID 0

	static bool sysfw_loaded;
	static void *sysfw_load_address;

	/*
	* Populate SPL hook to override the default load address used by the SPL
	* loader function with a custom address for SYSFW loading.
	*/
	struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
	{
	if (sysfw_loaded)
	return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
	else if (sysfw_load_address)
	return sysfw_load_address;
	else
	panic("SYSFW load address not defined!");
	}

	/*
	* Populate SPL hook to skip the default SPL loader FIT post-processing steps
	* during SYSFW loading and return to the calling function so we can perform
	* our own custom processing.
	*/
	bool spl_load_simple_fit_skip_processing(void)
	{
	return !sysfw_loaded;
	}

	static int fit_get_data_by_name(const void fit, int images, const char name,
	const void *addr, size_t size)
	{
	int node_offset;

	node_offset = fdt_subnode_offset(fit, images, name);
	if (node_offset < 0)
	return -ENOENT;

	return fit_image_get_data(fit, node_offset, addr, size);
	}

	static void k3_start_system_controller(int rproc_id, bool rproc_loaded,
	ulong addr, ulong size)
	{
	int ret;

	ret = rproc_dev_init(rproc_id);
	if (ret)
	panic("rproc failed to be initialized (%d)\n", ret);

	if (!rproc_loaded) {
	ret = rproc_load(rproc_id, addr, size);
	if (ret)
	panic("Firmware failed to start on rproc (%d)\n", ret);
	}

	ret = rproc_start(0);
	if (ret)
	panic("Firmware init failed on rproc (%d)\n", ret);
	}

	static void k3_sysfw_load_using_fit(void *fit)
	{
	int images;
	const void *sysfw_addr;
	size_t sysfw_size;
	int ret;

	/* Find the node holding the images information */
	images = fdt_path_offset(fit, FIT_IMAGES_PATH);
	if (images < 0)
	panic("Cannot find /images node (%d)\n", images);

	/* Extract System Firmware (SYSFW) image from FIT */
	ret = fit_get_data_by_name(fit, images, SYSFW_FIRMWARE,
	&sysfw_addr, &sysfw_size);
	if (ret < 0)
	panic("Error accessing %s node in FIT (%d)\n", SYSFW_FIRMWARE,
	ret);

	/* Start up system controller firmware */
	k3_start_system_controller(K3_SYSTEM_CONTROLLER_RPROC_ID, false,
	(ulong)sysfw_addr, (ulong)sysfw_size);
	}

	static void k3_sysfw_configure_using_fit(void *fit,
	struct ti_sci_handle *ti_sci)
	{
	struct ti_sci_board_ops *board_ops = &ti_sci->ops.board_ops;
	int images;
	const void *cfg_fragment_addr;
	size_t cfg_fragment_size;
	int ret;

	/* Find the node holding the images information */
	images = fdt_path_offset(fit, FIT_IMAGES_PATH);
	if (images < 0)
	panic("Cannot find /images node (%d)\n", images);

	/* Extract board configuration from FIT */
	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_BOARD,
	&cfg_fragment_addr, &cfg_fragment_size);
	if (ret < 0)
	panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_BOARD,
	ret);

	/* Apply board configuration to SYSFW */
	ret = board_ops->board_config(ti_sci,
	(u64)(u32)cfg_fragment_addr,
	(u32)cfg_fragment_size);
	if (ret)
	panic("Failed to set board configuration (%d)\n", ret);

	/* Extract power/clock (PM) specific configuration from FIT */
	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_PM,
	&cfg_fragment_addr, &cfg_fragment_size);
	if (ret < 0)
	panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_PM,
	ret);

	/* Apply power/clock (PM) specific configuration to SYSFW */
	ret = board_ops->board_config_pm(ti_sci,
	(u64)(u32)cfg_fragment_addr,
	(u32)cfg_fragment_size);
	if (ret)
	panic("Failed to set board PM configuration (%d)\n", ret);

	/* Extract resource management (RM) specific configuration from FIT */
	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_RM,
	&cfg_fragment_addr, &cfg_fragment_size);
	if (ret < 0)
	panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_RM,
	ret);

	/* Apply resource management (RM) configuration to SYSFW */
	ret = board_ops->board_config_rm(ti_sci,
	(u64)(u32)cfg_fragment_addr,
	(u32)cfg_fragment_size);
	if (ret)
	panic("Failed to set board RM configuration (%d)\n", ret);

	/* Extract security specific configuration from FIT */
	ret = fit_get_data_by_name(fit, images, SYSFW_CFG_SEC,
	&cfg_fragment_addr, &cfg_fragment_size);
	if (ret < 0)
	panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_SEC,
	ret);

	/* Apply security configuration to SYSFW */
	ret = board_ops->board_config_security(ti_sci,
	(u64)(u32)cfg_fragment_addr,
	(u32)cfg_fragment_size);
	if (ret)
	panic("Failed to set board security configuration (%d)\n",
	ret);
	}

	#if CONFIG_IS_ENABLED(DFU)
	static int k3_sysfw_dfu_download(void *addr)
	{
	char dfu_str[50];
	int ret;

	sprintf(dfu_str, "sysfw.itb ram 0x%p 0x%x", addr,
	CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
	ret = dfu_config_entities(dfu_str, "ram", "0");
	if (ret) {
	dfu_free_entities();
	goto exit;
	}

	run_usb_dnl_gadget(0, "usb_dnl_dfu");
	exit:
	dfu_free_entities();
	return ret;
	}
	#endif

	#if CONFIG_IS_ENABLED(SPI_LOAD)
	static void *k3_sysfw_get_spi_addr(void)
	{
	struct udevice *dev;
	fdt_addr_t addr;
	int ret;

	ret = uclass_find_device_by_seq(UCLASS_SPI, CONFIG_SF_DEFAULT_BUS,
	&dev);
	if (ret)
	return NULL;

	addr = dev_read_addr_index(dev, 1);
	if (addr == FDT_ADDR_T_NONE)
	return NULL;

	return (void *)(addr + CONFIG_K3_SYSFW_IMAGE_SPI_OFFS);
	}
	#endif

	void k3_sysfw_loader(bool rom_loaded_sysfw,
	void (*config_pm_pre_callback)(void),
	void (*config_pm_done_callback)(void))
	{
	struct spl_image_info spl_image = { 0 };
	struct spl_boot_device bootdev = { 0 };
	struct ti_sci_handle *ti_sci;
	int ret = 0;

	if (rom_loaded_sysfw) {
	k3_start_system_controller(K3_SYSTEM_CONTROLLER_RPROC_ID,
	rom_loaded_sysfw, 0, 0);
	sysfw_loaded = true;
	return;
	}

	/* Reserve a block of aligned memory for loading the SYSFW image */
	sysfw_load_address = memalign(ARCH_DMA_MINALIGN,
	CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
	if (!sysfw_load_address)
	panic("Error allocating %u bytes of memory for SYSFW image\n",
	CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);

	debug("%s: allocated %u bytes at 0x%p\n", __func__,
	CONFIG_K3_SYSFW_IMAGE_SIZE_MAX, sysfw_load_address);

	/* Set load address for legacy modes that bypass spl_get_load_buffer */
	spl_image.load_addr = (uintptr_t)sysfw_load_address;

	bootdev.boot_device = spl_boot_device();

	/* Load combined System Controller firmware and config data image */
	switch (bootdev.boot_device) {
	#if CONFIG_IS_ENABLED(MMC_SUPPORT)
	case BOOT_DEVICE_MMC1:
	case BOOT_DEVICE_MMC2:
	case BOOT_DEVICE_MMC2_2:
	ret = spl_mmc_load(&spl_image, &bootdev,
	#ifdef CONFIG_K3_SYSFW_IMAGE_NAME
	CONFIG_K3_SYSFW_IMAGE_NAME,
	#else
	NULL,
	#endif
	#ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART
	CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART,
	#else
	0,
	#endif
	#ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT
	CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT);
	#else
	0);
	#endif
	break;
	#endif
	#if CONFIG_IS_ENABLED(SPI_LOAD)
	case BOOT_DEVICE_SPI:
	sysfw_load_address = k3_sysfw_get_spi_addr();
	if (!sysfw_load_address)
	ret = -ENODEV;
	break;
	#endif
	#if CONFIG_IS_ENABLED(YMODEM_SUPPORT)
	case BOOT_DEVICE_UART:
	#ifdef CONFIG_K3_EARLY_CONS
	/*
	* Establish a serial console if not yet available as required
	* for UART-based boot. For this use the early console feature
	* that allows setting up a UART for use before SYSFW has been
	* brought up. Note that the associated UART module's clocks
	* must have gotten enabled by the ROM bootcode which will be
	* the case when continuing to boot serially from the same
	* UART that the ROM loaded the initial bootloader from.
	*/
	if (!gd->have_console)
	early_console_init();
	#endif
	ret = spl_ymodem_load_image(&spl_image, &bootdev);
	break;
	#endif
	#if CONFIG_IS_ENABLED(DFU)
	case BOOT_DEVICE_DFU:
	ret = k3_sysfw_dfu_download(sysfw_load_address);
	break;
	#endif
	#if CONFIG_IS_ENABLED(USB_STORAGE)
	case BOOT_DEVICE_USB:
	ret = spl_usb_load(&spl_image, &bootdev,
	CONFIG_SYS_USB_FAT_BOOT_PARTITION,
	#ifdef CONFIG_K3_SYSFW_IMAGE_NAME
	CONFIG_K3_SYSFW_IMAGE_NAME);
	#else
	NULL);
	#endif
	#endif
	break;
	default:
	panic("Loading SYSFW image from device %u not supported!\n",
	bootdev.boot_device);
	}

	if (ret)
	panic("Error %d occurred during loading SYSFW image!\n", ret);

	/*
	* Now that SYSFW got loaded set helper flag to restore regular SPL
	* loader behavior so we can later boot into the next stage as expected.
	*/
	sysfw_loaded = true;

	/* Ensure the SYSFW image is in FIT format */
	if (image_get_magic((const image_header_t *)sysfw_load_address) !=
	FDT_MAGIC)
	panic("SYSFW image not in FIT format!\n");

	/* Extract and start SYSFW */
	k3_sysfw_load_using_fit(sysfw_load_address);

	/* Get handle for accessing SYSFW services */
	ti_sci = get_ti_sci_handle();

	if (config_pm_pre_callback)
	config_pm_pre_callback();

	/* Parse and apply the different SYSFW configuration fragments */
	k3_sysfw_configure_using_fit(sysfw_load_address, ti_sci);

	/*
	* Now that all clocks and PM aspects are setup, invoke a user-
	* provided callback function. Usually this callback would be used
	* to setup or re-configure the U-Boot console UART.
	*/
	if (config_pm_done_callback)
	config_pm_done_callback();
	}