// SPDX-License-Identifier: GPL-2.0 /* * Copyright IBM Corp. 2007, 2018 */ /* * Early setup functions which may not rely on an initialized bss * section. The last thing that is supposed to happen here is * initialization of the bss section. */ #include <linux/processor.h> #include <linux/string.h> #include <asm/sections.h> #include <asm/lowcore.h> #include <asm/timex.h> #include <asm/kasan.h> #include "entry.h" static void __init reset_tod_clock(void) { u64 time; if (store_tod_clock(&time) == 0) return; /* TOD clock not running. Set the clock to Unix Epoch. */ if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0) disabled_wait(); memset(tod_clock_base, 0, 16); *(__u64 *) &tod_clock_base[1] = TOD_UNIX_EPOCH; S390_lowcore.last_update_clock = TOD_UNIX_EPOCH; } static void __init clear_bss_section(void) { memset(__bss_start, 0, __bss_stop - __bss_start); } void __init startup_init_nobss(void) { reset_tod_clock(); clear_bss_section(); kasan_early_init(); }