blob: ec5ee910d9d0d6a586d7a31c2a01ac134fcd350f [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
* Copyright (C) 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 <reset.h>
#include <soc/northbridge.h>
#include <soc/pci_devs.h>
#include <device/pci_ops.h>
#include <soc/southbridge.h>
#include <amdblocks/acpimmio.h>
#include <amdblocks/reset.h>
void set_warm_reset_flag(void)
{
u32 htic;
htic = pci_read_config32(SOC_HT_DEV, HT_INIT_CONTROL);
htic |= HTIC_COLD_RST_DET;
pci_write_config32(SOC_HT_DEV, HT_INIT_CONTROL, htic);
}
int is_warm_reset(void)
{
u32 htic;
htic = pci_read_config32(SOC_HT_DEV, HT_INIT_CONTROL);
return !!(htic & HTIC_COLD_RST_DET);
}
/* Clear bits 5, 9 & 10, used to signal the reset type */
static void clear_bios_reset(void)
{
u32 htic;
htic = pci_read_config32(SOC_HT_DEV, HT_INIT_CONTROL);
htic &= ~HTIC_BIOSR_DETECT;
pci_write_config32(SOC_HT_DEV, HT_INIT_CONTROL, htic);
}
void do_cold_reset(void)
{
clear_bios_reset();
/* De-assert and then assert all PwrGood signals on CF9 reset. */
pm_write16(PWR_RESET_CFG, pm_read16(PWR_RESET_CFG) |
TOGGLE_ALL_PWR_GOOD);
outb(RST_CMD | SYS_RST, SYS_RESET);
}
void do_warm_reset(void)
{
set_warm_reset_flag();
clear_bios_reset();
/* Assert reset signals only. */
outb(RST_CMD | SYS_RST, SYS_RESET);
}
void do_board_reset(void)
{
/* TODO: Would a warm_reset() suffice? */
do_cold_reset();
}