Function mi_startup

freebsd/kern/init_main.c:229–346

* System startup; initialize the world, create process 0, mount root * filesystem, and fork to create init and pagedaemon. Most of the * hard work is done in the lower-level initialization routines including * startup(), which does memory initialization and autoconfiguration. * * This allows simple addition of new kernel subsystems that require * boot time initialization. It also allows su

 * module.  Finally, it allows for optional "kernel threads".
 */
void
mi_startup(void)
{

	struct sysinit **sipp;	/* system initialization*/
	struct sysinit **xipp;	/* interior loop of sort*/
	struct sysinit *save;	/* bubble*/

#if defined(VERBOSE_SYSINIT)
	int last;
	int verbose;
#endif

	TSENTER();

	if (boothowto & RB_VERBOSE)
		bootverbose++;

	if (sysinit == NULL) {
		sysinit = SET_BEGIN(sysinit_set);
		sysinit_end = SET_LIMIT(sysinit_set);
	}

restart:
	/*
	 * Perform a bubble sort of the system initialization objects by
	 * their subsystem (primary key) and order (secondary key).
	 */
	for (sipp = sysinit; sipp < sysinit_end; sipp++) {
		for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
			if ((*sipp)->subsystem < (*xipp)->subsystem ||
			     ((*sipp)->subsystem == (*xipp)->subsystem &&
			      (*sipp)->order <= (*xipp)->order))
				continue;	/* skip*/
			save = *sipp;
			*sipp = *xipp;
			*xipp = save;
		}
	}

#if defined(VERBOSE_SYSINIT)
	last = SI_SUB_COPYRIGHT;
	verbose = 0;
#if !defined(DDB)
	printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n");
#endif
#endif

	/*
	 * Traverse the (now) ordered list of system initialization tasks.
	 * Perform each task, and continue on to the next task.
	 */
	for (sipp = sysinit; sipp < sysinit_end; sipp++) {
		if ((*sipp)->subsystem == SI_SUB_DUMMY)
			continue;	/* skip dummy task(s)*/

		if ((*sipp)->subsystem == SI_SUB_DONE)
			continue;