src/southbridge/nvidia/mcp55/reset.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2004 Tyan Computer
 * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
 * Copyright (C) 2006,2007 AMD
 * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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>

#define PCI_DEV(BUS, DEV, FN) ( \
	(((BUS) & 0xFFF) << 20) | \
	(((DEV) & 0x1F) << 15) | \
	(((FN)  & 0x7) << 12))

static void pci_write_config32(pci_devfn_t dev, unsigned where, unsigned value)
{
	unsigned addr;
	addr = (dev>>4) | where;
	outl(0x80000000 | (addr & ~3), 0xCF8);
	outl(value, 0xCFC);
}

static unsigned pci_read_config32(pci_devfn_t dev, unsigned where)
{
	unsigned addr;
	addr = (dev>>4) | where;
	outl(0x80000000 | (addr & ~3), 0xCF8);
	return inl(0xCFC);
}

#include "../../../northbridge/amd/amdk8/reset_test.c"

void hard_reset(void)
{
	set_bios_reset();
	/* Try rebooting through port 0xcf9 */
	/* Actually it is not a real hard_reset --- it only reset coherent link table, but not reset link freq and width */
	outb((0 <<3)|(0<<2)|(1<<1), 0xcf9);
	outb((0 <<3)|(1<<2)|(1<<1), 0xcf9);
}