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.
 *
 * 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>
#if CONFIG_LOGICAL_CPUS==1
#include <cpu/amd/dualcore.h>
#endif

#include <cpu/amd/amdk8_sysconf.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,
};


extern void get_sblk_pci1234(void);

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;

        device_t dev;
        int i, j;

        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 = sizeof(pci1234x)/sizeof(pci1234x[0]);

        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_type[0] = 1; //pci

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

	for (i = 0; i < sysconf.hc_possible_num; i++) {
		unsigned busn_min, busn_max;

		if (!(sysconf.pci1234[i] & 0x1))
			continue;

                busn_min = (sysconf.pci1234[i] >> 16) & 0xff;
                busn_max = (sysconf.pci1234[i] >> 24) & 0xff;
		for (j = busn_min; j <= busn_max; j++)
			m->bus_type[j] = 1;
		if(m->bus_isa <= busn_max)
			m->bus_isa = busn_max + 1;
	        printk_debug("i=%d bus range: [%x, %x] bus_isa=%x\n",i, busn_min, busn_max, m->bus_isa);
	}

                /* 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 CONFIG_LOGICAL_CPUS==1
	apicid_base = get_apicid_base(2);
#else
	apicid_base = CONFIG_MAX_PHYSICAL_CPUS;
#endif
	m->apicid_mcp55 = apicid_base+0;
        m->apicid_mcp55b = apicid_base+1;

}