Stefan Reinauer | 2319027 | 2008-08-20 13:41:24 +0000 | [diff] [blame] | 1 | /* |
| 2 | * inteltool - dump all registers on an Intel CPU + chipset based system. |
| 3 | * |
| 4 | * Copyright (C) 2008 by coresystems GmbH |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <sys/mman.h> |
| 24 | |
| 25 | #include "inteltool.h" |
| 26 | |
| 27 | /* |
| 28 | * (G)MCH MMIO Config Space |
| 29 | */ |
| 30 | int print_mchbar(struct pci_dev *nb) |
| 31 | { |
| 32 | int i, size = (16 * 1024); |
| 33 | volatile uint8_t *mchbar; |
| 34 | uint32_t mchbar_phys; |
| 35 | |
| 36 | printf("\n============= MCHBAR ============\n\n"); |
| 37 | |
| 38 | switch (nb->device_id) { |
| 39 | case PCI_DEVICE_ID_INTEL_82945GM: |
| 40 | mchbar_phys = pci_read_long(nb, 0x44) & 0xfffffffe; |
| 41 | break; |
| 42 | case 0x1234: // Dummy for non-existent functionality |
| 43 | printf("This northbrigde does not have MCHBAR.\n"); |
| 44 | return 1; |
| 45 | default: |
| 46 | printf("Error: Dumping MCHBAR on this northbridge is not (yet) supported.\n"); |
| 47 | return 1; |
| 48 | } |
| 49 | |
| 50 | mchbar = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED, |
| 51 | fd_mem, (off_t) mchbar_phys); |
| 52 | |
| 53 | if (mchbar == MAP_FAILED) { |
| 54 | perror("Error mapping MCHBAR"); |
| 55 | exit(1); |
| 56 | } |
| 57 | |
| 58 | printf("MCHBAR = 0x%08x (MEM)\n\n", mchbar_phys); |
| 59 | |
| 60 | for (i = 0; i < size; i += 4) { |
| 61 | if (*(uint32_t *)(mchbar + i)) |
| 62 | printf("0x%04x: 0x%08x\n", i, *(uint32_t *)(mchbar+i)); |
| 63 | } |
| 64 | |
| 65 | munmap((void *)mchbar, size); |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | |