src/mainboard/supermicro/h8dme/get_bus_conf.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2007 AMD
 * Written by Yinghai Lu <yinghailu@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 <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>

// Global variables for MB layouts and these will be shared by irqtable mptable and acpi_tables
//busnum is default
unsigned char bus_mcp55[8];	//1
unsigned apicid_mcp55;

unsigned char bus_pcix[3];	// under bus_mcp55_2

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,
};

unsigned sbdnb;

static unsigned get_bus_conf_done = 0;

void get_bus_conf(void)
{

	unsigned apicid_base;
	unsigned sbdn;

	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_sblk_pci1234();

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

	sbdnb = (sysconf.hcdn[1] & 0xff);	// first byte of second chain

	for (i = 0; i < 8; i++) {
		bus_mcp55[i] = 0;
	}

	for (i = 0; i < 3; i++) {
		bus_pcix[i] = 0;
	}

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

	/* MCP55 */
	dev = dev_find_slot(bus_mcp55[0], PCI_DEVFN(sbdn + 0x06, 0));
	if (dev) {
		bus_mcp55[1] = pci_read_config8(dev, PCI_SECONDARY_BUS);
		bus_mcp55[2] = pci_read_config8(dev, PCI_SUBORDINATE_BUS);
		bus_mcp55[2]++;
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI 1:%02x.0, using defaults\n",
		       sbdn + 0x06);

		bus_mcp55[1] = 2;
		bus_mcp55[2] = 3;
	}

	for (i = 2; i < 8; i++) {
		dev =
		    dev_find_slot(bus_mcp55[0],
				  PCI_DEVFN(sbdn + 0x0a + i - 2, 0));
		if (dev) {
			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",
			       bus_mcp55[0], sbdn + 0x0a + i - 2);
		}
	}

	if (bus_mcp55[2]) {
		for (i = 0; i < 2; i++) {
			dev = dev_find_slot(bus_mcp55[2], PCI_DEVFN(0, i));
			if (dev) {
				bus_pcix[0] = bus_mcp55[2];
				bus_pcix[i + 1] =
				    pci_read_config8(dev, PCI_SECONDARY_BUS);
			}
		}
	}

/*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;
	apicid_mcp55 = apicid_base + 0;

}