46 lines
1015 B
C
46 lines
1015 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright IBM Corp. 2007, 2018
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*/
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/*
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* Early setup functions which may not rely on an initialized bss
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* section. The last thing that is supposed to happen here is
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* initialization of the bss section.
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*/
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#include <linux/processor.h>
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#include <linux/string.h>
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#include <asm/sections.h>
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#include <asm/lowcore.h>
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#include <asm/timex.h>
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#include <asm/kasan.h>
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#include "entry.h"
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static void __init reset_tod_clock(void)
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{
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u64 time;
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if (store_tod_clock(&time) == 0)
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return;
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/* TOD clock not running. Set the clock to Unix Epoch. */
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if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0)
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disabled_wait(0);
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memset(tod_clock_base, 0, 16);
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*(__u64 *) &tod_clock_base[1] = TOD_UNIX_EPOCH;
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S390_lowcore.last_update_clock = TOD_UNIX_EPOCH;
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}
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static void __init clear_bss_section(void)
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{
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memset(__bss_start, 0, __bss_stop - __bss_start);
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}
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void __init startup_init_nobss(void)
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{
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reset_tod_clock();
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clear_bss_section();
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kasan_early_init();
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}
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