src/mainboard/tyan/s2895/get_bus_conf.c

#include <console/console.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <string.h>
#include <stdint.h>
#if CONFIG_LOGICAL_CPUS
#include <cpu/amd/multicore.h>
#endif

#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_ck804_0;	//1
unsigned char bus_ck804_1;	//2
unsigned char bus_ck804_2;	//3
unsigned char bus_ck804_3;	//4
unsigned char bus_ck804_4;	//5
unsigned char bus_ck804_5;	//6
unsigned char bus_8131_0;	//7
unsigned char bus_8131_1;	//8
unsigned char bus_8131_2;	//9
unsigned char bus_ck804b_0;	//a
unsigned char bus_ck804b_1;	//b
unsigned char bus_ck804b_2;	//c
unsigned char bus_ck804b_3;	//d
unsigned char bus_ck804b_4;	//e
unsigned char bus_ck804b_5;	//f
unsigned apicid_ck804;
unsigned apicid_8131_1;
unsigned apicid_8131_2;
unsigned apicid_ck804b;

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 sbdn3;
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;

	sbdn3 = (sysconf.hcdn[1] & 0xff);

	sbdnb = (sysconf.hcdn[2] & 0xff);	// first byte of second chain

	bus_ck804_0 = (sysconf.pci1234[0] >> 16) & 0xff;

	/* CK804 */
	dev = dev_find_slot(bus_ck804_0, PCI_DEVFN(sbdn + 0x09, 0));
	if (dev) {
		bus_ck804_1 = pci_read_config8(dev, PCI_SECONDARY_BUS);
		bus_ck804_5 = pci_read_config8(dev, PCI_SUBORDINATE_BUS);
		bus_ck804_5++;
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI 1:%02x.0, using defaults\n",
		       sbdn + 0x09);

		bus_ck804_1 = 2;
		bus_ck804_5 = 3;
	}

	dev = dev_find_slot(bus_ck804_0, PCI_DEVFN(sbdn + 0x0e, 0));
	if (dev) {
		bus_ck804_5 = pci_read_config8(dev, PCI_SECONDARY_BUS);
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI 1:%02x.0, using defaults\n",
		       sbdn + 0x0e);
	}

	bus_8131_0 = (sysconf.pci1234[1] >> 16) & 0xff;
	/* 8131-1 */
	dev = dev_find_slot(bus_8131_0, PCI_DEVFN(sbdn3, 0));
	if (dev) {
		bus_8131_1 = pci_read_config8(dev, PCI_SECONDARY_BUS);
		bus_8131_2 = pci_read_config8(dev, PCI_SUBORDINATE_BUS);
		bus_8131_2++;
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI %02x:01.0, using defaults\n",
		       bus_8131_0);

		bus_8131_1 = bus_8131_0 + 1;
		bus_8131_2 = bus_8131_0 + 2;
	}
	/* 8131-2 */
	dev = dev_find_slot(bus_8131_0, PCI_DEVFN(sbdn3, 0));
	if (dev) {
		bus_8131_2 = pci_read_config8(dev, PCI_SECONDARY_BUS);
	} else {
		printk(BIOS_DEBUG,
		       "ERROR - could not find PCI %02x:02.0, using defaults\n",
		       bus_8131_0);

		bus_8131_2 = bus_8131_1 + 1;
	}

	/* CK804b */

	if (sysconf.pci1234[2] & 0x0f) {	//if the second cpu is installed
		bus_ck804b_0 = (sysconf.pci1234[2] >> 16) & 0xff;

		dev = dev_find_slot(bus_ck804b_0, PCI_DEVFN(sbdnb + 0x0e, 0));
		if (dev) {
			bus_ck804b_5 = pci_read_config8(dev, PCI_SECONDARY_BUS);
		} else {
			printk(BIOS_DEBUG,
			       "ERROR - could not find PCI %02x:%02x.0, using defaults\n",
			       bus_ck804b_0, sbdnb + 0x0e);
			bus_ck804b_5 = bus_ck804b_4 + 1;
		}
	}

/*I/O APICs:	APIC ID	Version	State		Address*/
#if CONFIG_LOGICAL_CPUS
	apicid_base = get_apicid_base(4);
#else
	apicid_base = CONFIG_MAX_PHYSICAL_CPUS;
#endif
	apicid_ck804 = apicid_base + 0;
	apicid_8131_1 = apicid_base + 1;
	apicid_8131_2 = apicid_base + 2;
	apicid_ck804b = apicid_base + 3;
}