src/mainboard/amd/olivehill/get_bus_conf.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2012 Advanced Micro Devices, 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <console/console.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <cpu/amd/amdfam14.h>
#include "agesawrapper.h"
#if IS_ENABLED(CONFIG_HUDSON_IMC_FWM)
#include "imc.h"
#endif

/* Global variables for MB layouts and these will be shared by irqtable mptable
 * and acpi_tables busnum is default.
 */
u8 bus_yangtze[6];
u32 apicid_yangtze;


void get_bus_conf(void)
{
	u32 apicid_base;
	u32 value;

	device_t dev;
	int i;


	dev = dev_find_slot(0, PCI_DEVFN(0, 0)); /* clear IoapicSbFeatureEn */
	pci_write_config32(dev, 0xF8, 0);
	pci_write_config32(dev, 0xFC, 5); /* TODO: move it to dsdt.asl */

	/* disable No Snoop */
	dev = dev_find_slot(0, PCI_DEVFN(1, 1));
	value = pci_read_config32(dev, 0x60);
	value &= ~(1 << 11);
	pci_write_config32(dev, 0x60, value);


	memset(bus_yangtze, 0, sizeof(bus_yangtze));



	/* yangtze */
	dev = dev_find_slot(0, PCI_DEVFN(0x14, 4));

	if (dev) {
		bus_yangtze[1] = pci_read_config8(dev, PCI_SECONDARY_BUS);
	}

	for (i = 0; i < 4; i++) {
		dev = dev_find_slot(0, PCI_DEVFN(0x14, i));
		if (dev) {
			bus_yangtze[2 + i] = pci_read_config8(dev, PCI_SECONDARY_BUS);
		}
	}

	/* I/O APICs:   APIC ID Version State   Address */
	apicid_base = CONFIG_MAX_CPUS;
	apicid_yangtze = apicid_base;
}