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==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 = 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[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_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_debug("ERROR - could not find PCI %02x:%02x.0, using defaults\n", m->bus_mcp55[0], sysconf.sbdn + 0x0a + i - 2 );
        	        }
		}

		if(m->bus_mcp55[2]) {
			for(i=0;i<2; i++) {
	                        dev = dev_find_slot(m->bus_mcp55[2], PCI_DEVFN(0, i));
        	                if(dev) {
                	                m->bus_pcix[0] = m->bus_mcp55[2];
                        	        m->bus_pcix[i+1] = pci_read_config8(dev, PCI_SECONDARY_BUS);
	                        }
			}
		}
		
	for(i=0; i< sysconf.hc_possible_num; i++) {
		if(!(sysconf.pci1234[i] & 0x1) ) continue;

                unsigned busn = (sysconf.pci1234[i] >> 16) & 0xff;
                unsigned busn_max = (sysconf.pci1234[i] >> 24) & 0xff;
		for (j = busn; 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, 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[0] = (sysconf.pci1234[1]>>16) & 0xff;
		m->bus_mcp55b[1] = m->bus_mcp55b[0]+1; //fake pci

		for(i=2; i<8;i++) {
	                dev = dev_find_slot(m->bus_mcp55b[0], PCI_DEVFN(m->sbdnb + 0x0a + i - 2 , 0));
        	        if (dev) {
                	        m->bus_mcp55b[i] = pci_read_config8(dev, PCI_SECONDARY_BUS);
	                }
        	        else {
                	        printk_debug("ERROR - could not find PCI %02x:%02x.0, using defaults\n", m->bus_mcp55b[0], m->sbdnb + 0x0a + i - 2 );
        	        }
		}
	}


/*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;

}