src/mainboard/nvidia/l1_2pvv/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>
#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;

static unsigned get_hcid(unsigned i)
{
	unsigned id = 0;

	unsigned busn = (sysconf.pci1234[i] >> 16) & 0xff;

	unsigned devn = sysconf.hcdn[i] & 0xff;

	device_t dev;

	dev = dev_find_slot(busn, PCI_DEVFN(devn,0));

	switch (dev->device) {
	case 0x0369: //IO55
		id = 4;
		break;
	}

	// we may need more way to find out hcid: subsystem id? GPIO read ?

	// we need use id for 1. bus num, 2. mptable, 3. ACPI table

	return id;
}

void get_bus_conf(void)
{
	unsigned apicid_base;
	struct mb_sysconf_t *m;

	int i;

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

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

		/* MCP55b */
	for (i = 1; i < sysconf.hc_possible_num; i++) {
		if (!(sysconf.pci1234[i] & 0x0f))
			continue;
		// check hcid type here
		sysconf.hcid[i] = get_hcid(i);
		if (!sysconf.hcid[i])
			continue; //unknown co processor

		m->bus_mcp55b = (sysconf.pci1234[1]>>16) & 0xff;
	}

/*I/O APICs:	APIC ID	Version	State		Address*/
	if (IS_ENABLED(CONFIG_LOGICAL_CPUS))
		apicid_base = get_apicid_base(2);
	else
		apicid_base = CONFIG_MAX_PHYSICAL_CPUS;
	m->apicid_mcp55 = apicid_base+0;
	m->apicid_mcp55b = apicid_base+1;
}