1 // SPDX-License-Identifier: GPL-2.0-only
7  *  GK 2/5/95  -  Changed to support mounting root fs via NFS
9  *  Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96
126  * two things - IRQ must not be enabled before the flag is cleared and some
136  * Boot command-line arguments
145 /* Untouched command line saved by arch-specific code. */
208 		int n = strlen(p->str);  in obsolete_checksetup()
209 		if (parameqn(line, p->str, n)) {  in obsolete_checksetup()
210 			if (p->early) {  in obsolete_checksetup()
217 			} else if (!p->setup_func) {  in obsolete_checksetup()
219 					p->str);  in obsolete_checksetup()
221 			} else if (p->setup_func(line + n))  in obsolete_checksetup()
231  * This should be approx 2 Bo*oMips to start (note initial shift), and will
266 	return -EINVAL;  in loglevel()
282 	data = (char *)initrd_end - BOOTCONFIG_MAGIC_LEN;  in get_boot_config_from_initrd()
290 		data--;  in get_boot_config_from_initrd()
295 	hdr = (u32 *)(data - 8);  in get_boot_config_from_initrd()
299 	data = ((void *)hdr) - size;  in get_boot_config_from_initrd()
302 			size, initrd_end - initrd_start);  in get_boot_config_from_initrd()
329 #define rest(dst, end) ((end) > (dst) ? (end) - (dst) : 0)
362 	return buf - (end - size);  in xbc_snprint_cmdline()
434 	/* parse_args() stops at the next param of '--' and returns an address */  in setup_boot_config()
436 		initargs_offs = err - tmp_cmdline;  in setup_boot_config()
498 			val[-1] = '=';  in repair_env_string()
500 			val[-2] = '=';  in repair_env_string()
501 			memmove(val-1, val, strlen(val)+1);  in repair_env_string()
507 /* Anything after -- gets handed straight to init. */
540 	/* Handle obsolete-style parameters */  in unknown_bootoption()
625 		ilen = strlen(extra_init_args) + 4; /* for " -- " */  in setup_command_line()
640 		 * lines because there could be dashes (separator of init  in setup_command_line()
641 		 * command line) in the command lines.  in setup_command_line()
655 		 * " -- "[bootconfig init-param][cmdline init-param]  in setup_command_line()
660 			len += ilen - 4;	/* strlen(extra_init_args) */  in setup_command_line()
662 				boot_command_line + initargs_offs - 1);  in setup_command_line()
665 			strcpy(saved_command_line + len, " -- ");  in setup_command_line()
673  * We need to finalize in a non-__init function or else race conditions
678  * gcc-3.4 accidentally inlines this function, so use noinline.
702 	tsk->flags |= PF_NO_SETAFFINITY;  in rest_init()
739 		if ((p->early && parameq(param, p->str)) ||  in do_early_param()
741 		     strcmp(p->str, "earlycon") == 0)  in do_early_param()
743 			if (p->setup_func(val) != 0)  in do_early_param()
803 /* Report memory auto-initialization states for this boot. */
821 	pr_info("mem auto-init: stack:%s, heap alloc:%s, heap free:%s\n",  in report_meminit()
825 		pr_info("mem auto-init: clearing system memory may take some time...\n");  in report_meminit()
858 	/* Should be run before the first non-init thread is created */  in mm_init()
930 	/* Start at unknown_options[1] to skip the initial space */  in print_unknown_bootoptions()
964 	smp_prepare_boot_cpu();	/* arch-specific boot-cpu hooks */  in start_kernel()
976 				  __stop___param - __start___param,  in start_kernel()
977 				  -1, -1, NULL, &unknown_bootoption);  in start_kernel()
980 		parse_args("Setting init args", after_dashes, NULL, 0, -1, -1,  in start_kernel()
984 			   NULL, 0, -1, -1, NULL, set_init_arg);  in start_kernel()
986 	/* Architectural and non-timekeeping rng init, before allocator init */  in start_kernel()
1007 	 * time - but meanwhile we still have a functioning scheduler.  in start_kernel()
1019 	 * workqueue to take non-housekeeping into account.  in start_kernel()
1082 	 * to self-test [hard/soft]-irqs on/off lock inversion bugs  in start_kernel()
1091 	 * not cause "plain-text" data to be decrypted when accessed.  in start_kernel()
1098 		pr_crit("initrd overwritten (0x%08lx < 0x%08lx) - disabling it.\n",  in start_kernel()
1144 	/* Do the rest non-__init'ed, we're now alive */  in start_kernel()
1156  * cannot do it again - but we do need CONFIG_CONSTRUCTORS  in do_ctors()
1180 	/* str argument is a comma-separated list of functions */  in initcall_blacklist()
1190 			entry->buf = memblock_alloc(strlen(str_entry) + 1,  in initcall_blacklist()
1192 			if (!entry->buf)  in initcall_blacklist()
1195 			strcpy(entry->buf, str_entry);  in initcall_blacklist()
1196 			list_add(&entry->next, &blacklisted_initcalls);  in initcall_blacklist()
1217 	 * displayed for built-in init functions.  Strip off the [module_name].  in initcall_blacklisted()
1222 		if (!strcmp(fn_name, entry->buf)) {  in initcall_blacklisted()
1300 		return -EPERM;  in do_one_initcall()
1370 		   __stop___param - __start___param,  in do_initcall_level()
1389 	for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) {  in do_initcalls()
1444 	if (ret && ret != -ENOENT) {  in try_to_run_init_process()
1515 	 * Wait until kthreadd is all set-up.  in kernel_init()
1532 	 * Kernel mappings are now finalized - update the userspace page-table  in kernel_init()
1582 	      "See Linux Documentation/admin-guide/init.rst for guidance.");  in kernel_init()
1591 		pr_err("Warning: unable to open an initial console.\n");  in console_on_rootfs()
1648 	 * Ok, we have completed the initial bootup, and  in kernel_init_freeable()
1650 	 * initmem segments and start the user-mode stuff..  in kernel_init_freeable()