main.c

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

/* #define	DEBUG	*/

#include <common.h>
#include <autoboot.h>
#include <cli.h>
#include <console.h>
#include <version.h>
#include <kubos.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * Board-specific Platform code can reimplement show_boot_progress () if needed
 */
__weak void show_boot_progress(int val) {}

static void run_preboot_environment_command(void)
{
#ifdef CONFIG_PREBOOT
	char *p;

	p = getenv("preboot");
	if (p != NULL) {
# ifdef CONFIG_AUTOBOOT_KEYED
		int prev = disable_ctrlc(1);	/* disable Control C checking */
# endif

		run_command_list(p, -1, 0);

# ifdef CONFIG_AUTOBOOT_KEYED
		disable_ctrlc(prev);	/* restore Control C checking */
# endif
	}
#endif /* CONFIG_PREBOOT */
}

/* We come here after U-Boot is initialised and ready to process commands */
void main_loop(void)
{
	const char *s;

	bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");

#ifdef CONFIG_VERSION_VARIABLE
	setenv("ver", version_string);  /* set version variable */
#endif /* CONFIG_VERSION_VARIABLE */

	cli_init();

	run_preboot_environment_command();

#if defined(CONFIG_UPDATE_TFTP)
	update_tftp(0UL, NULL, NULL);
#endif /* CONFIG_UPDATE_TFTP */

#if defined(CONFIG_UPDATE_KUBOS)
	if (update_kubos(KUBOS_UPGRADE) != KUBOS_ERR_NO_REBOOT)
	{
		/* 
		 * If everything went well, we want to reboot into the new
		 * files.  The watchdog gets tripped if we try to boot the
		 * new kernel from here, so we reboot instead.
		 *
		 * If everything didn't go well but we still hit this line,
		 * it means we want to reboot and re-attempt the upgrade
		 */
		do_reset(NULL, 0, 0, NULL);
	}
#endif /* CONFIG_UPDATE_KUBOS */

	s = bootdelay_process();
	if (cli_process_fdt(&s))
		cli_secure_boot_cmd(s);

	autoboot_command(s);

	cli_loop();
	panic("No CLI available");
}