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/*
* This file is part of the coreboot project.
*
* Copyright 2017 Google, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/io.h>
#include <arch/cache.h>
#include <cf9_reset.h>
#include <console/console.h>
#include <halt.h>
/*
* A system reset in terms of the CF9 register asserts the INIT#
* signal to reset the CPU along the PLTRST# signal to reset other
* board components. It is usually the hardest reset type that
* does not power cycle the board. Thus, it could be called a
* "warm reset".
*/
void do_system_reset(void)
{
dcache_clean_all();
outb(SYS_RST, RST_CNT);
outb(RST_CPU | SYS_RST, RST_CNT);
}
/*
* A full reset in terms of the CF9 register triggers a power cycle
* (i.e. S0 -> S5 -> S0 transition). Thus, it could be called a
* "cold reset".
* Note: Not all x86 implementations comply with this defitinion,
* some may require additional configuration to power cycle.
*/
void do_full_reset(void)
{
dcache_clean_all();
outb(FULL_RST | SYS_RST, RST_CNT);
outb(FULL_RST | RST_CPU | SYS_RST, RST_CNT);
}
void system_reset(void)
{
printk(BIOS_INFO, "%s() called!\n", __func__);
cf9_reset_prepare();
do_system_reset();
halt();
}
void full_reset(void)
{
printk(BIOS_INFO, "%s() called!\n", __func__);
cf9_reset_prepare();
do_full_reset();
halt();
}
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