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/*
* inteltool - dump all registers on an Intel CPU + chipset based system.
*
* Copyright (C) 2008 by coresystems GmbH
*
* 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 <sys/mman.h>
#include "inteltool.h"
/*
* Egress Port Root Complex MMIO configuration space
*/
int print_epbar(struct pci_dev *nb)
{
int i, size = (4 * 1024);
volatile uint8_t *epbar;
uint32_t epbar_phys;
printf("\n============= EPBAR =============\n\n");
switch (nb->device_id) {
case PCI_DEVICE_ID_INTEL_82945GM:
case PCI_DEVICE_ID_INTEL_82945P:
epbar_phys = pci_read_long(nb, 0x40) & 0xfffffffe;
break;
case 0x1234: // Dummy for non-existent functionality
printf("This northbrigde does not have EPBAR.\n");
return 1;
default:
printf("Error: Dumping EPBAR on this northbridge is not (yet) supported.\n");
return 1;
}
epbar = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
fd_mem, (off_t) epbar_phys);
if (epbar == MAP_FAILED) {
perror("Error mapping EPBAR");
exit(1);
}
printf("EPBAR = 0x%08x (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));
}
munmap((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;
uint32_t dmibar_phys;
printf("\n============= DMIBAR ============\n\n");
switch (nb->device_id) {
case PCI_DEVICE_ID_INTEL_82945GM:
case PCI_DEVICE_ID_INTEL_82945P:
dmibar_phys = pci_read_long(nb, 0x4c) & 0xfffffffe;
break;
case 0x1234: // Dummy for non-existent functionality
printf("This northbrigde does not have DMIBAR.\n");
return 1;
default:
printf("Error: Dumping DMIBAR on this northbridge is not (yet) supported.\n");
return 1;
}
dmibar = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
fd_mem, (off_t) dmibar_phys);
if (dmibar == MAP_FAILED) {
perror("Error mapping DMIBAR");
exit(1);
}
printf("DMIBAR = 0x%08x (MEM)\n\n", dmibar_phys);
for (i = 0; i < size; i += 4) {
if (*(uint32_t *)(dmibar + i))
printf("0x%04x: 0x%08x\n", i, *(uint32_t *)(dmibar+i));
}
munmap((void *)dmibar, size);
return 0;
}
/*
* PCIe MMIO configuration space
*/
int print_pciexbar(struct pci_dev *nb)
{
uint32_t pciexbar_reg;
uint32_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_82945GM:
case PCI_DEVICE_ID_INTEL_82945P:
pciexbar_reg = pci_read_long(nb, 0x48);
break;
case 0x1234: // Dummy for non-existent functionality
printf("Error: This northbrigde 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 & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28));
max_busses = 256;
break;
case 1: // 128M
pciexbar_phys = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27));
max_busses = 128;
break;
case 2: // 64M
pciexbar_phys = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26));
max_busses = 64;
break;
default: // RSVD
printf("Undefined address base. Bailing out.\n");
return 1;
}
printf("PCIEXBAR: 0x%08x\n", pciexbar_phys);
pciexbar = mmap(0, (max_busses * 1024 * 1024), PROT_WRITE | PROT_READ,
MAP_SHARED, fd_mem, (off_t) pciexbar_phys);
if (pciexbar == MAP_FAILED) {
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");
}
}
}
munmap((void *)pciexbar, (max_busses * 1024 * 1024));
return 0;
}
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