src/mainboard/iwill/dk8_htx/get_bus_conf.c

#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;

static 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,		// SB chain m
	0x0000000,		// HTX
	0x0000100,		// co processor on socket 1
//        0x0000ff0,
//        0x0000ff0,
//        0x0000ff0,
//        0x0000ff0,
//        0x0000ff0
};

static 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 0x7458:		//8132
		id = 1;
		break;
	case 0x7454:		//8151
		id = 2;
		break;
	case 0x7450:		//8131
		id = 3;
		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;

	device_t dev;
	int i, j;
	struct mb_sysconf_t *m;

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

	get_bus_conf_done = 1;

	sysconf.mb = &mb_sysconf;

	m = sysconf.mb;

	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] >> 8) & 0xff;
	m->sbdn3 = sysconf.hcdn[0] & 0xff;

	m->bus_8132_0 = (sysconf.pci1234[0] >> 16) & 0xff;
	m->bus_8111_0 = m->bus_8132_0;

	/* 8111 */
	dev = dev_find_slot(m->bus_8111_0, PCI_DEVFN(sysconf.sbdn, 0));
	if (dev) {
		m->bus_8111_1 = pci_read_config8(dev, PCI_SECONDARY_BUS);
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI %02x:%02x.0, using defaults\n",
		       m->bus_8111_0, sysconf.sbdn);
	}

	/* 8132-1 */
	dev = dev_find_slot(m->bus_8132_0, PCI_DEVFN(m->sbdn3, 0));
	if (dev) {
		m->bus_8132_1 = pci_read_config8(dev, PCI_SECONDARY_BUS);
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI %02x:%02x.0, using defaults\n",
		       m->bus_8132_0, m->sbdn3);
	}

	/* 8132-2 */
	dev = dev_find_slot(m->bus_8132_0, PCI_DEVFN(m->sbdn3 + 1, 0));
	if (dev) {
		m->bus_8132_2 = pci_read_config8(dev, PCI_SECONDARY_BUS);
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI %02x:%02x.0, using defaults\n",
		       m->bus_8132_0, m->sbdn3 + 1);
	}

	/* HT chain 1 */
	j = 0;
	for (i = 1; i < sysconf.hc_possible_num; i++) {
		if (!(sysconf.pci1234[i] & 0x1))
			continue;

		// check hcid type here
		sysconf.hcid[i] = get_hcid(i);

		switch (sysconf.hcid[i]) {

		case 1:	//8132
		case 3:	//8131

			m->bus_8132a[j][0] = (sysconf.pci1234[i] >> 16) & 0xff;

			m->sbdn3a[j] = sysconf.hcdn[i] & 0xff;

			/* 8132-1 */
			dev =
			    dev_find_slot(m->bus_8132a[j][0],
					  PCI_DEVFN(m->sbdn3a[j], 0));
			if (dev) {
				m->bus_8132a[j][1] =
				    pci_read_config8(dev, PCI_SECONDARY_BUS);
			} else {
				printk(BIOS_DEBUG,
				       "ERROR - could not find PCI %02x:%02x.0, using defaults\n",
				       m->bus_8132a[j][0], m->sbdn3a[j]);
			}

			/* 8132-2 */
			dev =
			    dev_find_slot(m->bus_8132a[j][0],
					  PCI_DEVFN(m->sbdn3a[j] + 1, 0));
			if (dev) {
				m->bus_8132a[j][2] =
				    pci_read_config8(dev, PCI_SECONDARY_BUS);
			} else {
				printk(BIOS_DEBUG,
				       "ERROR - could not find PCI %02x:%02x.0, using defaults\n",
				       m->bus_8132a[j][0], m->sbdn3a[j] + 1);
			}

			break;

		case 2:	//8151

			m->bus_8151[j][0] = (sysconf.pci1234[i] >> 16) & 0xff;
			m->sbdn5[j] = sysconf.hcdn[i] & 0xff;
			/* 8151 */
			dev =
			    dev_find_slot(m->bus_8151[j][0],
					  PCI_DEVFN(m->sbdn5[j] + 1, 0));

			if (dev) {
				m->bus_8151[j][1] =
				    pci_read_config8(dev, PCI_SECONDARY_BUS);
			} else {
				printk(BIOS_DEBUG,
				       "ERROR - could not find PCI %02x:%02x.0, using defaults\n",
				       m->bus_8151[j][0], m->sbdn5[j] + 1);
			}

			break;
		}

		j++;
	}

/*I/O APICs:	APIC ID	Version	State		Address*/
	if (IS_ENABLED(CONFIG_LOGICAL_CPUS))
		apicid_base = get_apicid_base(3);
	else
		apicid_base = CONFIG_MAX_PHYSICAL_CPUS;
	m->apicid_8111 = apicid_base + 0;
	m->apicid_8132_1 = apicid_base + 1;
	m->apicid_8132_2 = apicid_base + 2;
	for (i = 0; i < j; i++) {
		m->apicid_8132a[i][0] = apicid_base + 3 + i * 2;
		m->apicid_8132a[i][1] = apicid_base + 3 + i * 2 + 1;
	}

}