src/mainboard/amd/tilapia_fam10/get_bus_conf.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2010 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>
#if CONFIG_LOGICAL_CPUS==1
#include <cpu/amd/multicore.h>
#endif

#include <cpu/amd/amdfam10_sysconf.h>

/* Global variables for MB layouts and these will be shared by irqtable mptable
* and acpi_tables busnum is default.
*/
u8 bus_rs780[11];
u8 bus_sb700[2];
u32 apicid_sb700;

/*
* Here you only need to set value in pci1234 for HT-IO that could be installed or not
* You may need to preset pci1234 for HTIO board,
* please refer to src/northbridge/amd/amdk8/get_sblk_pci1234.c for detail
*/
u32 pci1234x[] = {
	0x0000ff0,
};

/*
* HT Chain device num, actually it is unit id base of every ht device in chain,
* assume every chain only have 4 ht device at most
*/
u32 hcdnx[] = {
	0x20202020,
};

u32 sbdn_rs780;
u32 sbdn_sb700;

extern void get_pci1234(void);

static u32 get_bus_conf_done = 0;

void get_bus_conf(void)
{
	u32 apicid_base;
	device_t dev;
	int i;

	if (get_bus_conf_done == 1)
		return;		/* do it only once */
	get_bus_conf_done = 1;

	sysconf.hc_possible_num = ARRAY_SIZE(pci1234x);
	for (i = 0; i < sysconf.hc_possible_num; i++) {
		sysconf.pci1234[i] = pci1234x[i];
		sysconf.hcdn[i] = hcdnx[i];
	}

	get_pci1234();

	sysconf.sbdn = (sysconf.hcdn[0] & 0xff);
	sbdn_rs780 = sysconf.sbdn;
	sbdn_sb700 = 0;

	for (i = 0; i < 2; i++) {
		bus_sb700[i] = 0;
	}
	for (i = 0; i < ARRAY_SIZE(bus_rs780); i++) {
		bus_rs780[i] = 0;
	}

	bus_rs780[0] = (sysconf.pci1234[0] >> 16) & 0xff;
	bus_sb700[0] = bus_rs780[0];

	/* sb700 */
	dev = dev_find_slot(bus_sb700[0], PCI_DEVFN(sbdn_sb700 + 0x14, 4));
	if (dev) {
		bus_sb700[1] = pci_read_config8(dev, PCI_SECONDARY_BUS);
	}

	/* rs780 */
	for (i = 1; i < ARRAY_SIZE(bus_rs780); i++) {
		dev = dev_find_slot(bus_rs780[0], PCI_DEVFN(sbdn_rs780 + i, 0));
		if (dev) {
			bus_rs780[i] = pci_read_config8(dev, PCI_SECONDARY_BUS);
		}
	}

	/* I/O APICs:   APIC ID Version State   Address */
#if CONFIG_LOGICAL_CPUS==1
	apicid_base = get_apicid_base(1);
#else
	apicid_base = CONFIG_MAX_PHYSICAL_CPUS;
#endif
	apicid_sb700 = apicid_base + 0;
}