src/mainboard/msi/ms9282/get_bus_conf.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2006 AMD
 * Written by Yinghai Lu <yinghailu@amd.com> for AMD.
 *
 * Copyright (C) 2006 MSI
 * Written by Bingxun Shi <bingxunshi@gmail.com> for MSI.
 *
 * 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 <console/console.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <string.h>
#include <stdint.h>
#include <cpu/amd/multicore.h>

#include <cpu/amd/amdk8_sysconf.h>

#include <stdlib.h>
#include "mb_sysconf.h"

// Global variables for MB layouts and these will be shared by irqtable mptable and acpi_tables
struct mb_sysconf_t mb_sysconf;

unsigned pci1234x[] = {		//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
	0x0000ff0,
	0x0000ff0,
	0x0000ff0,
//        0x0000ff0,
//        0x0000ff0,
//        0x0000ff0,
//        0x0000ff0,
//        0x0000ff0
};

unsigned hcdnx[] = {		//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
	0x20202020,
	0x20202020,
	0x20202020,
//        0x20202020,
//        0x20202020,
//        0x20202020,
//        0x20202020,
//        0x20202020,
};

static unsigned get_bus_conf_done = 0;

void get_bus_conf(void)
{

	unsigned apicid_base;
	struct mb_sysconf_t *m;

	device_t dev;
	int i;

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

	get_bus_conf_done = 1;

	sysconf.mb = &mb_sysconf;

	m = sysconf.mb;
	memset(m, 0, sizeof(struct mb_sysconf_t));

	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_sblk_pci1234();

	sysconf.sbdn = (sysconf.hcdn[0] & 0xff);	// first byte of first chain

	m->bus_mcp55[0] = (sysconf.pci1234[0] >> 16) & 0xff;

	/* MCP55 */
	dev = dev_find_slot(m->bus_mcp55[0], PCI_DEVFN(sysconf.sbdn + 0x06, 0));
	if (dev) {
		m->bus_mcp55[1] = pci_read_config8(dev, PCI_SECONDARY_BUS);
	} else {
		printk(BIOS_DEBUG,
			"ERROR - could not find PCI 1:%02x.0, using defaults\n",
			sysconf.sbdn + 0x06);
	}

	for (i = 2; i < 8; i++) {
		dev =
			dev_find_slot(m->bus_mcp55[0],
				PCI_DEVFN(sysconf.sbdn + 0x0a + i - 2, 0));
		if (dev) {
			m->bus_mcp55[i] =
				pci_read_config8(dev, PCI_SECONDARY_BUS);
		} else {
			printk(BIOS_DEBUG,
				"ERROR - could not find PCI %02x:%02x.0, using defaults\n",
				m->bus_mcp55[0], sysconf.sbdn + 0x0a + i - 2);
		}
	}

/*I/O APICs:   APIC ID Version State           Address*/
	if (IS_ENABLED(CONFIG_LOGICAL_CPUS))
		apicid_base = get_apicid_base(1);
	else
		apicid_base = CONFIG_MAX_PHYSICAL_CPUS;
	m->apicid_mcp55 = apicid_base + 0;

}