util/inteltool/pcie.c - mirrors/cros/chromiumos/third_party/coreboot - Git at Google

 /*
  * inteltool - dump all registers on an Intel CPU + chipset based system.
  *
  * Copyright (C) 2008-2010 by coresystems GmbH
  * Copyright (C) 2012 Anton Kochkov
  *
  * 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; version 2 of the License.
  *
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include <inttypes.h>
 #include "inteltool.h"

 static const io_register_t sandybridge_dmi_registers[] = {
 	{ 0x00, 4, "DMI VCECH" }, // DMI Virtual Channel Enhanced Capability
 	{ 0x04, 4, "DMI PVCCAP1" }, // DMI Port VC Capability Register 1
 	{ 0x08, 4, "DMI PVVAP2" }, // DMI Port VC Capability Register 2
 	{ 0x0C, 2, "DMI PVCCTL" }, // DMI Port VC Control
 /*	{ 0x0E, 2, "RSVD" }, // Reserved */
 	{ 0x10, 4, "DMI VC0RCAP" }, // DMI VC0 Resource Capability
 	{ 0x14, 4, "DMI VC0RCTL" }, // DMI VC0 Resource Control
 /*	{ 0x18, 2, "RSVD" }, // Reserved */
 	{ 0x1A, 2, "DMI VC0RSTS" }, // DMI VC0 Resource Status
 	{ 0x1C, 4, "DMI VC1RCAP" }, // DMI VC1 Resource Capability
 	{ 0x20, 4, "DMI VC1RCTL" }, // DMI VC1 Resource Control
 /*	{ 0x24, 2, "RSVD" }, // Reserved */
 	{ 0x26, 2, "DMI VC1RSTS" }, // DMI VC1 Resource Status
 	{ 0x28, 4, "DMI VCPRCAP" }, // DMI VCp Resource Capability
 	{ 0x2C, 4, "DMI VCPRCTL" }, // DMI VCp Resource Control
 /*	{ 0x30, 2, "RSVD" }, // Reserved */
 	{ 0x32, 2, "DMI VCPRSTS" }, // DMI VCp Resource Status
 	{ 0x34, 4, "DMI VCMRCAP" }, // DMI VCm Resource Capability
 	{ 0x38, 4, "DMI VCMRCTL" }, // DMI VCm Resource Control
 /*	{ 0x3C, 2, "RSVD" }, // Reserved */
 	{ 0x3E, 2, "DMI VCMRSTS" }, // DMI VCm Resource Status
 /*	{ 0x40, 4, "RSVD" }, // Reserved */
 	{ 0x44, 4, "DMI ESC" }, // DMI Element Self Description
 /*	{ 0x48, 8, "RSVD" }, // Reserved */
 	{ 0x50, 4, "DMI LE1D" }, // DMI Link Entry 1 Description
 /*	{ 0x54, 4, "RSVD" }, // Reserved */
 	{ 0x58, 4, "DMI LE1A" }, // DMI Link Entry 1 Address
 	{ 0x5C, 4, "DMI LUE1A" }, // DMI Link Upper Entry 1 Address
 	{ 0x60, 4, "DMI LE2D" }, // DMI Link Entry 2 Description
 /*	{ 0x64, 4, "RSVD" }, // Reserved */
 	{ 0x68, 4, "DMI LE2A" }, // DMI Link Entry 2 Address
 /*	{ 0x6C, 4, "RSVD" }, // Reserved
 	{ 0x70, 8, "RSVD" }, // Reserved
 	{ 0x78, 8, "RSVD" }, // Reserved
 	{ 0x80, 4, "RSVD" }, // Reserved */
 	{ 0x84, 4, "LCAP" }, // Link Capabilities
 	{ 0x88, 2, "LCTL" }, // Link Control
 	{ 0x8A, 2, "LSTS" }, // Link Status
 /*	{ 0x8C, 4, "RSVD" }, // Reserved
 	{ 0x90, 4, "RSVD" }, // Reserved
 	{ 0x94, 4, "RSVD" }, // Reserved */
 	{ 0x98, 2, "LCTL2" }, // Link Control 2
 	{ 0x9A, 2, "LSTS2" }, // Link Status 2
 /*	... - Reserved */
 	{ 0xBC0, 4, "AFE_BMUF0" }, // AFE BMU Configuration Function 0
 	{ 0xBC4, 4, "RSVD" }, // Reserved
 	{ 0xBC8, 4, "RSVD" }, // Reserved
 	{ 0xBCC, 4, "AFE_BMUT0" }, // AFE BMU Configuration Test 0
 /*	... - Reserved */
 };

 /*
  * Egress Port Root Complex MMIO configuration space
  */
 int print_epbar(struct pci_dev *nb)
 {
 	int i, size = (4 * 1024);
 	volatile uint8_t *epbar;
 	uint64_t epbar_phys;

 	printf("\n============= EPBAR =============\n\n");

 	switch (nb->device_id) {
 	case PCI_DEVICE_ID_INTEL_82915:
 	case PCI_DEVICE_ID_INTEL_82945GM:
 	case PCI_DEVICE_ID_INTEL_82945GSE:
 	case PCI_DEVICE_ID_INTEL_82945P:
 	case PCI_DEVICE_ID_INTEL_82946:
 	case PCI_DEVICE_ID_INTEL_82975X:
 		epbar_phys = pci_read_long(nb, 0x40) & 0xfffffffe;
 		break;
 	case PCI_DEVICE_ID_INTEL_82965PM:
 	case PCI_DEVICE_ID_INTEL_82Q965:
 	case PCI_DEVICE_ID_INTEL_82Q35:
 	case PCI_DEVICE_ID_INTEL_82G33:
 	case PCI_DEVICE_ID_INTEL_82Q33:
 	case PCI_DEVICE_ID_INTEL_82X38:
 	case PCI_DEVICE_ID_INTEL_32X0:
 	case PCI_DEVICE_ID_INTEL_82X4X:
 	case PCI_DEVICE_ID_INTEL_ATOM_DXXX:
 	case PCI_DEVICE_ID_INTEL_ATOM_NXXX:
 		epbar_phys = pci_read_long(nb, 0x40) & 0xfffffffe;
 		epbar_phys |= ((uint64_t)pci_read_long(nb, 0x44)) << 32;
 		break;
 	case PCI_DEVICE_ID_INTEL_82810:
 	case PCI_DEVICE_ID_INTEL_82810_DC:
 	case PCI_DEVICE_ID_INTEL_82810E_DC:
 	case PCI_DEVICE_ID_INTEL_82830M:
 	case PCI_DEVICE_ID_INTEL_82865:
 		printf("This northbridge does not have EPBAR.\n");
 		return 1;
 	default:
 		printf("Error: Dumping EPBAR on this northbridge is not (yet) supported.\n");
 		return 1;
 	}

 	epbar = map_physical(epbar_phys, size);

 	if (epbar == NULL) {
 		perror("Error mapping EPBAR");
 		exit(1);
 	}

 	printf("EPBAR = 0x%08" PRIx64 " (MEM)\n\n", epbar_phys);
 	for (i = 0; i < size; i += 4) {
 		if (*(uint32_t *)(epbar + i))
 			printf("0x%04x: 0x%08x\n", i, *(uint32_t *)(epbar+i));
 	}

 	unmap_physical((void *)epbar, size);
 	return 0;
 }

 /*
  * MCH-ICH Serial Interconnect Ingress Root Complex MMIO configuration space
  */
 int print_dmibar(struct pci_dev *nb)
 {
 	int i, size = (4 * 1024);
 	volatile uint8_t *dmibar;
 	uint64_t dmibar_phys;
 	const io_register_t *dmi_registers = NULL;

 	printf("\n============= DMIBAR ============\n\n");

 	switch (nb->device_id) {
 	case PCI_DEVICE_ID_INTEL_82915:
 	case PCI_DEVICE_ID_INTEL_82945GM:
 	case PCI_DEVICE_ID_INTEL_82945GSE:
 	case PCI_DEVICE_ID_INTEL_82945P:
 	case PCI_DEVICE_ID_INTEL_82975X:
 		dmibar_phys = pci_read_long(nb, 0x4c) & 0xfffffffe;
 		break;
 	case PCI_DEVICE_ID_INTEL_82946:
 	case PCI_DEVICE_ID_INTEL_82965PM:
 	case PCI_DEVICE_ID_INTEL_82Q965:
 	case PCI_DEVICE_ID_INTEL_82Q35:
 	case PCI_DEVICE_ID_INTEL_82G33:
 	case PCI_DEVICE_ID_INTEL_82Q33:
 	case PCI_DEVICE_ID_INTEL_82X38:
 	case PCI_DEVICE_ID_INTEL_32X0:
 	case PCI_DEVICE_ID_INTEL_82X4X:
 	case PCI_DEVICE_ID_INTEL_ATOM_DXXX:
 	case PCI_DEVICE_ID_INTEL_ATOM_NXXX:
 		dmibar_phys = pci_read_long(nb, 0x68) & 0xfffffffe;
 		dmibar_phys |= ((uint64_t)pci_read_long(nb, 0x6c)) << 32;
 		break;
 	case PCI_DEVICE_ID_INTEL_82810:
 	case PCI_DEVICE_ID_INTEL_82810_DC:
 	case PCI_DEVICE_ID_INTEL_82810E_DC:
 	case PCI_DEVICE_ID_INTEL_82865:
 		printf("This northbridge does not have DMIBAR.\n");
 		return 1;
 	case PCI_DEVICE_ID_INTEL_82X58:
 		dmibar_phys = pci_read_long(nb, 0x50) & 0xfffff000;
 		break;
 	case PCI_DEVICE_ID_INTEL_CORE_1ST_GEN:
 		dmibar_phys = pci_read_long(nb, 0x68);
 		dmibar_phys |= ((uint64_t)pci_read_long(nb, 0x6c)) << 32;
 		dmibar_phys &= 0x0000000ffffff000UL; /* 35:12 */
 		dmi_registers = NULL; /* No public documentation */
 		break;
 	case PCI_DEVICE_ID_INTEL_CORE_2ND_GEN:
 		dmi_registers = sandybridge_dmi_registers;
 		size = ARRAY_SIZE(sandybridge_dmi_registers);
 	case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN: /* pretty printing not implemented yet */
 		dmibar_phys = pci_read_long(nb, 0x68);
 		dmibar_phys |= ((uint64_t)pci_read_long(nb, 0x6c)) << 32;
 		dmibar_phys &= 0x0000007ffffff000UL; /* 38:12 */
 		break;
 	default:
 		printf("Error: Dumping DMIBAR on this northbridge is not (yet) supported.\n");
 		return 1;
 	}

 	dmibar = map_physical(dmibar_phys, size);

 	if (dmibar == NULL) {
 		perror("Error mapping DMIBAR");
 		exit(1);
 	}

 	printf("DMIBAR = 0x%08" PRIx64 " (MEM)\n\n", dmibar_phys);
 	if (dmi_registers != NULL) {
 		for (i = 0; i < size; i++) {
 			switch (dmi_registers[i].size) {
 				case 4:
 					printf("dmibase+0x%04x: 0x%08x (%s)\n",
 						dmi_registers[i].addr,
 						*(uint32_t *)(dmibar+dmi_registers[i].addr),
 						dmi_registers[i].name);
 					break;
 				case 2:
 					printf("dmibase+0x%04x: 0x%04x     (%s)\n",
 						dmi_registers[i].addr,
 						*(uint16_t *)(dmibar+dmi_registers[i].addr),
 						dmi_registers[i].name);
 					break;
 				case 1:
 					printf("dmibase+0x%04x: 0x%02x       (%s)\n",
 						dmi_registers[i].addr,
 						*(uint8_t *)(dmibar+dmi_registers[i].addr),
 						dmi_registers[i].name);
 					break;
 			}
 		}
 	} else {
 		for (i = 0; i < size; i += 4) {
 			if (*(uint32_t *)(dmibar + i))
 				printf("0x%04x: 0x%08x\n", i, *(uint32_t *)(dmibar+i));
 		}
 	}

 	unmap_physical((void *)dmibar, size);
 	return 0;
 }

 /*
  * PCIe MMIO configuration space
  */
 int print_pciexbar(struct pci_dev *nb)
 {
 	uint64_t pciexbar_reg;
 	uint64_t pciexbar_phys;
 	volatile uint8_t *pciexbar;
 	int max_busses, devbase, i;
 	int bus, dev, fn;

 	printf("========= PCIEXBAR ========\n\n");

 	switch (nb->device_id) {
 	case PCI_DEVICE_ID_INTEL_82915:
 	case PCI_DEVICE_ID_INTEL_82945GM:
 	case PCI_DEVICE_ID_INTEL_82945GSE:
 	case PCI_DEVICE_ID_INTEL_82945P:
 	case PCI_DEVICE_ID_INTEL_82975X:
 		pciexbar_reg = pci_read_long(nb, 0x48);
 		break;
 	case PCI_DEVICE_ID_INTEL_82946:
 	case PCI_DEVICE_ID_INTEL_82965PM:
 	case PCI_DEVICE_ID_INTEL_82Q965:
 	case PCI_DEVICE_ID_INTEL_82Q35:
 	case PCI_DEVICE_ID_INTEL_82G33:
 	case PCI_DEVICE_ID_INTEL_82Q33:
 	case PCI_DEVICE_ID_INTEL_82X38:
 	case PCI_DEVICE_ID_INTEL_32X0:
 	case PCI_DEVICE_ID_INTEL_82X4X:
 	case PCI_DEVICE_ID_INTEL_ATOM_DXXX:
 	case PCI_DEVICE_ID_INTEL_ATOM_NXXX:
 		pciexbar_reg = pci_read_long(nb, 0x60);
 		pciexbar_reg |= ((uint64_t)pci_read_long(nb, 0x64)) << 32;
 		break;
 	case PCI_DEVICE_ID_INTEL_82810:
 	case PCI_DEVICE_ID_INTEL_82810_DC:
 	case PCI_DEVICE_ID_INTEL_82810E_DC:
 	case PCI_DEVICE_ID_INTEL_82865:
 		printf("Error: This northbridge does not have PCIEXBAR.\n");
 		return 1;
 	default:
 		printf("Error: Dumping PCIEXBAR on this northbridge is not (yet) supported.\n");
 		return 1;
 	}

 	if (!(pciexbar_reg & (1 << 0))) {
 		printf("PCIEXBAR register is disabled.\n");
 		return 0;
 	}

 	switch ((pciexbar_reg >> 1) & 3) {
 	case 0: // 256MB
 		pciexbar_phys = pciexbar_reg & (0xff << 28);
 		max_busses = 256;
 		break;
 	case 1: // 128M
 		pciexbar_phys = pciexbar_reg & (0x1ff << 27);
 		max_busses = 128;
 		break;
 	case 2: // 64M
 		pciexbar_phys = pciexbar_reg & (0x3ff << 26);
 		max_busses = 64;
 		break;
 	default: // RSVD
 		printf("Undefined address base. Bailing out.\n");
 		return 1;
 	}

 	printf("PCIEXBAR: 0x%08" PRIx64 "\n", pciexbar_phys);

 	pciexbar = map_physical(pciexbar_phys, (max_busses * 1024 * 1024));

 	if (pciexbar == NULL) {
 		perror("Error mapping PCIEXBAR");
 		exit(1);
 	}

 	for (bus = 0; bus < max_busses; bus++) {
 		for (dev = 0; dev < 32; dev++) {
 			for (fn = 0; fn < 8; fn++) {
 				devbase = (bus * 1024 * 1024) + (dev * 32 * 1024) + (fn * 4 * 1024);

 				if (*(uint16_t *)(pciexbar + devbase) == 0xffff)
 					continue;

 				/* This is a heuristics. Anyone got a better check? */
 				if( (*(uint32_t *)(pciexbar + devbase + 256) == 0xffffffff) &&
 					(*(uint32_t *)(pciexbar + devbase + 512) == 0xffffffff) ) {
 #if DEBUG
 					printf("Skipped non-PCIe device %02x:%02x.%01x\n", bus, dev, fn);
 #endif
 					continue;
 				}

 				printf("\nPCIe %02x:%02x.%01x extended config space:", bus, dev, fn);
 				for (i = 0; i < 4096; i++) {
 					if((i % 0x10) == 0)
 						printf("\n%04x:", i);
 					printf(" %02x", *(pciexbar+devbase+i));
 				}
 				printf("\n");
 			}
 		}
 	}

 	unmap_physical((void *)pciexbar, (max_busses * 1024 * 1024));

 	return 0;
 }
	/*
	* inteltool - dump all registers on an Intel CPU + chipset based system.
	*
	* Copyright (C) 2008-2010 by coresystems GmbH
	* Copyright (C) 2012 Anton Kochkov
	*
	* 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; version 2 of the License.
	*
	* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <inttypes.h>
	#include "inteltool.h"

	static const io_register_t sandybridge_dmi_registers[] = {
	{ 0x00, 4, "DMI VCECH" }, // DMI Virtual Channel Enhanced Capability
	{ 0x04, 4, "DMI PVCCAP1" }, // DMI Port VC Capability Register 1
	{ 0x08, 4, "DMI PVVAP2" }, // DMI Port VC Capability Register 2
	{ 0x0C, 2, "DMI PVCCTL" }, // DMI Port VC Control
	/* { 0x0E, 2, "RSVD" }, // Reserved */
	{ 0x10, 4, "DMI VC0RCAP" }, // DMI VC0 Resource Capability
	{ 0x14, 4, "DMI VC0RCTL" }, // DMI VC0 Resource Control
	/* { 0x18, 2, "RSVD" }, // Reserved */
	{ 0x1A, 2, "DMI VC0RSTS" }, // DMI VC0 Resource Status
	{ 0x1C, 4, "DMI VC1RCAP" }, // DMI VC1 Resource Capability
	{ 0x20, 4, "DMI VC1RCTL" }, // DMI VC1 Resource Control
	/* { 0x24, 2, "RSVD" }, // Reserved */
	{ 0x26, 2, "DMI VC1RSTS" }, // DMI VC1 Resource Status
	{ 0x28, 4, "DMI VCPRCAP" }, // DMI VCp Resource Capability
	{ 0x2C, 4, "DMI VCPRCTL" }, // DMI VCp Resource Control
	/* { 0x30, 2, "RSVD" }, // Reserved */
	{ 0x32, 2, "DMI VCPRSTS" }, // DMI VCp Resource Status
	{ 0x34, 4, "DMI VCMRCAP" }, // DMI VCm Resource Capability
	{ 0x38, 4, "DMI VCMRCTL" }, // DMI VCm Resource Control
	/* { 0x3C, 2, "RSVD" }, // Reserved */
	{ 0x3E, 2, "DMI VCMRSTS" }, // DMI VCm Resource Status
	/* { 0x40, 4, "RSVD" }, // Reserved */
	{ 0x44, 4, "DMI ESC" }, // DMI Element Self Description
	/* { 0x48, 8, "RSVD" }, // Reserved */
	{ 0x50, 4, "DMI LE1D" }, // DMI Link Entry 1 Description
	/* { 0x54, 4, "RSVD" }, // Reserved */
	{ 0x58, 4, "DMI LE1A" }, // DMI Link Entry 1 Address
	{ 0x5C, 4, "DMI LUE1A" }, // DMI Link Upper Entry 1 Address
	{ 0x60, 4, "DMI LE2D" }, // DMI Link Entry 2 Description
	/* { 0x64, 4, "RSVD" }, // Reserved */
	{ 0x68, 4, "DMI LE2A" }, // DMI Link Entry 2 Address
	/* { 0x6C, 4, "RSVD" }, // Reserved
	{ 0x70, 8, "RSVD" }, // Reserved
	{ 0x78, 8, "RSVD" }, // Reserved
	{ 0x80, 4, "RSVD" }, // Reserved */
	{ 0x84, 4, "LCAP" }, // Link Capabilities
	{ 0x88, 2, "LCTL" }, // Link Control
	{ 0x8A, 2, "LSTS" }, // Link Status
	/* { 0x8C, 4, "RSVD" }, // Reserved
	{ 0x90, 4, "RSVD" }, // Reserved
	{ 0x94, 4, "RSVD" }, // Reserved */
	{ 0x98, 2, "LCTL2" }, // Link Control 2
	{ 0x9A, 2, "LSTS2" }, // Link Status 2
	/* ... - Reserved */
	{ 0xBC0, 4, "AFE_BMUF0" }, // AFE BMU Configuration Function 0
	{ 0xBC4, 4, "RSVD" }, // Reserved
	{ 0xBC8, 4, "RSVD" }, // Reserved
	{ 0xBCC, 4, "AFE_BMUT0" }, // AFE BMU Configuration Test 0
	/* ... - Reserved */
	};

	/*
	* Egress Port Root Complex MMIO configuration space
	*/
	int print_epbar(struct pci_dev *nb)
	{
	int i, size = (4 * 1024);
	volatile uint8_t *epbar;
	uint64_t epbar_phys;

	printf("\n============= EPBAR =============\n\n");

	switch (nb->device_id) {
	case PCI_DEVICE_ID_INTEL_82915:
	case PCI_DEVICE_ID_INTEL_82945GM:
	case PCI_DEVICE_ID_INTEL_82945GSE:
	case PCI_DEVICE_ID_INTEL_82945P:
	case PCI_DEVICE_ID_INTEL_82946:
	case PCI_DEVICE_ID_INTEL_82975X:
	epbar_phys = pci_read_long(nb, 0x40) & 0xfffffffe;
	break;
	case PCI_DEVICE_ID_INTEL_82965PM:
	case PCI_DEVICE_ID_INTEL_82Q965:
	case PCI_DEVICE_ID_INTEL_82Q35:
	case PCI_DEVICE_ID_INTEL_82G33:
	case PCI_DEVICE_ID_INTEL_82Q33:
	case PCI_DEVICE_ID_INTEL_82X38:
	case PCI_DEVICE_ID_INTEL_32X0:
	case PCI_DEVICE_ID_INTEL_82X4X:
	case PCI_DEVICE_ID_INTEL_ATOM_DXXX:
	case PCI_DEVICE_ID_INTEL_ATOM_NXXX:
	epbar_phys = pci_read_long(nb, 0x40) & 0xfffffffe;
	epbar_phys \|= ((uint64_t)pci_read_long(nb, 0x44)) << 32;
	break;
	case PCI_DEVICE_ID_INTEL_82810:
	case PCI_DEVICE_ID_INTEL_82810_DC:
	case PCI_DEVICE_ID_INTEL_82810E_DC:
	case PCI_DEVICE_ID_INTEL_82830M:
	case PCI_DEVICE_ID_INTEL_82865:
	printf("This northbridge does not have EPBAR.\n");
	return 1;
	default:
	printf("Error: Dumping EPBAR on this northbridge is not (yet) supported.\n");
	return 1;
	}

	epbar = map_physical(epbar_phys, size);

	if (epbar == NULL) {
	perror("Error mapping EPBAR");
	exit(1);
	}

	printf("EPBAR = 0x%08" PRIx64 " (MEM)\n\n", epbar_phys);
	for (i = 0; i < size; i += 4) {
	if ((uint32_t )(epbar + i))
	printf("0x%04x: 0x%08x\n", i, (uint32_t )(epbar+i));
	}

	unmap_physical((void *)epbar, size);
	return 0;
	}

	/*
	* MCH-ICH Serial Interconnect Ingress Root Complex MMIO configuration space
	*/
	int print_dmibar(struct pci_dev *nb)
	{
	int i, size = (4 * 1024);
	volatile uint8_t *dmibar;
	uint64_t dmibar_phys;
	const io_register_t *dmi_registers = NULL;

	printf("\n============= DMIBAR ============\n\n");

	switch (nb->device_id) {
	case PCI_DEVICE_ID_INTEL_82915:
	case PCI_DEVICE_ID_INTEL_82945GM:
	case PCI_DEVICE_ID_INTEL_82945GSE:
	case PCI_DEVICE_ID_INTEL_82945P:
	case PCI_DEVICE_ID_INTEL_82975X:
	dmibar_phys = pci_read_long(nb, 0x4c) & 0xfffffffe;
	break;
	case PCI_DEVICE_ID_INTEL_82946:
	case PCI_DEVICE_ID_INTEL_82965PM:
	case PCI_DEVICE_ID_INTEL_82Q965:
	case PCI_DEVICE_ID_INTEL_82Q35:
	case PCI_DEVICE_ID_INTEL_82G33:
	case PCI_DEVICE_ID_INTEL_82Q33:
	case PCI_DEVICE_ID_INTEL_82X38:
	case PCI_DEVICE_ID_INTEL_32X0:
	case PCI_DEVICE_ID_INTEL_82X4X:
	case PCI_DEVICE_ID_INTEL_ATOM_DXXX:
	case PCI_DEVICE_ID_INTEL_ATOM_NXXX:
	dmibar_phys = pci_read_long(nb, 0x68) & 0xfffffffe;
	dmibar_phys \|= ((uint64_t)pci_read_long(nb, 0x6c)) << 32;
	break;
	case PCI_DEVICE_ID_INTEL_82810:
	case PCI_DEVICE_ID_INTEL_82810_DC:
	case PCI_DEVICE_ID_INTEL_82810E_DC:
	case PCI_DEVICE_ID_INTEL_82865:
	printf("This northbridge does not have DMIBAR.\n");
	return 1;
	case PCI_DEVICE_ID_INTEL_82X58:
	dmibar_phys = pci_read_long(nb, 0x50) & 0xfffff000;
	break;
	case PCI_DEVICE_ID_INTEL_CORE_1ST_GEN:
	dmibar_phys = pci_read_long(nb, 0x68);
	dmibar_phys \|= ((uint64_t)pci_read_long(nb, 0x6c)) << 32;
	dmibar_phys &= 0x0000000ffffff000UL; /* 35:12 */
	dmi_registers = NULL; /* No public documentation */
	break;
	case PCI_DEVICE_ID_INTEL_CORE_2ND_GEN:
	dmi_registers = sandybridge_dmi_registers;
	size = ARRAY_SIZE(sandybridge_dmi_registers);
	case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN: /* pretty printing not implemented yet */
	dmibar_phys = pci_read_long(nb, 0x68);
	dmibar_phys \|= ((uint64_t)pci_read_long(nb, 0x6c)) << 32;
	dmibar_phys &= 0x0000007ffffff000UL; /* 38:12 */
	break;
	default:
	printf("Error: Dumping DMIBAR on this northbridge is not (yet) supported.\n");
	return 1;
	}

	dmibar = map_physical(dmibar_phys, size);

	if (dmibar == NULL) {
	perror("Error mapping DMIBAR");
	exit(1);
	}

	printf("DMIBAR = 0x%08" PRIx64 " (MEM)\n\n", dmibar_phys);
	if (dmi_registers != NULL) {
	for (i = 0; i < size; i++) {
	switch (dmi_registers[i].size) {
	case 4:
	printf("dmibase+0x%04x: 0x%08x (%s)\n",
	dmi_registers[i].addr,
	(uint32_t )(dmibar+dmi_registers[i].addr),
	dmi_registers[i].name);
	break;
	case 2:
	printf("dmibase+0x%04x: 0x%04x (%s)\n",
	dmi_registers[i].addr,
	(uint16_t )(dmibar+dmi_registers[i].addr),
	dmi_registers[i].name);
	break;
	case 1:
	printf("dmibase+0x%04x: 0x%02x (%s)\n",
	dmi_registers[i].addr,
	(uint8_t )(dmibar+dmi_registers[i].addr),
	dmi_registers[i].name);
	break;
	}
	}
	} else {
	for (i = 0; i < size; i += 4) {
	if ((uint32_t )(dmibar + i))
	printf("0x%04x: 0x%08x\n", i, (uint32_t )(dmibar+i));
	}
	}

	unmap_physical((void *)dmibar, size);
	return 0;
	}

	/*
	* PCIe MMIO configuration space
	*/
	int print_pciexbar(struct pci_dev *nb)
	{
	uint64_t pciexbar_reg;
	uint64_t pciexbar_phys;
	volatile uint8_t *pciexbar;
	int max_busses, devbase, i;
	int bus, dev, fn;

	printf("========= PCIEXBAR ========\n\n");

	switch (nb->device_id) {
	case PCI_DEVICE_ID_INTEL_82915:
	case PCI_DEVICE_ID_INTEL_82945GM:
	case PCI_DEVICE_ID_INTEL_82945GSE:
	case PCI_DEVICE_ID_INTEL_82945P:
	case PCI_DEVICE_ID_INTEL_82975X:
	pciexbar_reg = pci_read_long(nb, 0x48);
	break;
	case PCI_DEVICE_ID_INTEL_82946:
	case PCI_DEVICE_ID_INTEL_82965PM:
	case PCI_DEVICE_ID_INTEL_82Q965:
	case PCI_DEVICE_ID_INTEL_82Q35:
	case PCI_DEVICE_ID_INTEL_82G33:
	case PCI_DEVICE_ID_INTEL_82Q33:
	case PCI_DEVICE_ID_INTEL_82X38:
	case PCI_DEVICE_ID_INTEL_32X0:
	case PCI_DEVICE_ID_INTEL_82X4X:
	case PCI_DEVICE_ID_INTEL_ATOM_DXXX:
	case PCI_DEVICE_ID_INTEL_ATOM_NXXX:
	pciexbar_reg = pci_read_long(nb, 0x60);
	pciexbar_reg \|= ((uint64_t)pci_read_long(nb, 0x64)) << 32;
	break;
	case PCI_DEVICE_ID_INTEL_82810:
	case PCI_DEVICE_ID_INTEL_82810_DC:
	case PCI_DEVICE_ID_INTEL_82810E_DC:
	case PCI_DEVICE_ID_INTEL_82865:
	printf("Error: This northbridge does not have PCIEXBAR.\n");
	return 1;
	default:
	printf("Error: Dumping PCIEXBAR on this northbridge is not (yet) supported.\n");
	return 1;
	}

	if (!(pciexbar_reg & (1 << 0))) {
	printf("PCIEXBAR register is disabled.\n");
	return 0;
	}

	switch ((pciexbar_reg >> 1) & 3) {
	case 0: // 256MB
	pciexbar_phys = pciexbar_reg & (0xff << 28);
	max_busses = 256;
	break;
	case 1: // 128M
	pciexbar_phys = pciexbar_reg & (0x1ff << 27);
	max_busses = 128;
	break;
	case 2: // 64M
	pciexbar_phys = pciexbar_reg & (0x3ff << 26);
	max_busses = 64;
	break;
	default: // RSVD
	printf("Undefined address base. Bailing out.\n");
	return 1;
	}

	printf("PCIEXBAR: 0x%08" PRIx64 "\n", pciexbar_phys);

	pciexbar = map_physical(pciexbar_phys, (max_busses * 1024 * 1024));

	if (pciexbar == NULL) {
	perror("Error mapping PCIEXBAR");
	exit(1);
	}

	for (bus = 0; bus < max_busses; bus++) {
	for (dev = 0; dev < 32; dev++) {
	for (fn = 0; fn < 8; fn++) {
	devbase = (bus * 1024 * 1024) + (dev * 32 * 1024) + (fn * 4 * 1024);

	if ((uint16_t )(pciexbar + devbase) == 0xffff)
	continue;

	/* This is a heuristics. Anyone got a better check? */
	if( ((uint32_t )(pciexbar + devbase + 256) == 0xffffffff) &&
	((uint32_t )(pciexbar + devbase + 512) == 0xffffffff) ) {
	#if DEBUG
	printf("Skipped non-PCIe device %02x:%02x.%01x\n", bus, dev, fn);
	#endif
	continue;
	}

	printf("\nPCIe %02x:%02x.%01x extended config space:", bus, dev, fn);
	for (i = 0; i < 4096; i++) {
	if((i % 0x10) == 0)
	printf("\n%04x:", i);
	printf(" %02x", *(pciexbar+devbase+i));
	}
	printf("\n");
	}
	}
	}

	unmap_physical((void )pciexbar, (max_busses 1024 * 1024));

	return 0;
	}