| /* |
| * inteltool - dump all registers on an Intel CPU + chipset based system. |
| * |
| * Copyright (C) 2008-2010 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 "inteltool.h" |
| |
| /* |
| * (G)MCH MMIO Config Space |
| */ |
| int print_mchbar(struct pci_dev *nb, struct pci_access *pacc) |
| { |
| int i, size = (16 * 1024); |
| volatile uint8_t *mchbar; |
| uint64_t mchbar_phys; |
| struct pci_dev *nb_device6; /* "overflow device" on i865 */ |
| uint16_t pcicmd6; |
| |
| printf("\n============= MCHBAR ============\n\n"); |
| |
| switch (nb->device_id) { |
| case PCI_DEVICE_ID_INTEL_82865: |
| /* |
| * On i865, the memory access enable/disable bit (MCHBAREN on |
| * i945/i965) is not in the MCHBAR (i945/i965) register but in |
| * the PCICMD6 register. BAR6 and PCICMD6 reside on device 6. |
| * |
| * The actual base address is in BAR6 on i865 where on |
| * i945/i965 the base address is in MCHBAR. |
| */ |
| nb_device6 = pci_get_dev(pacc, 0, 0, 0x06, 0); /* Device 6 */ |
| mchbar_phys = pci_read_long(nb_device6, 0x10); /* BAR6 */ |
| pcicmd6 = pci_read_long(nb_device6, 0x04); /* PCICMD6 */ |
| |
| /* Try to enable Memory Access Enable (MAE). */ |
| if (!(pcicmd6 & (1 << 1))) { |
| printf("Access to BAR6 is currently disabled, " |
| "attempting to enable.\n"); |
| pci_write_long(nb_device6, 0x04, pcicmd6 | (1 << 1)); |
| if (pci_read_long(nb_device6, 0x04) & (1 << 1)) |
| printf("Enabled successfully.\n"); |
| else |
| printf("Enable FAILED!\n"); |
| } |
| mchbar_phys &= 0xfffff000; /* Bits 31:12 from BAR6 */ |
| break; |
| 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: |
| mchbar_phys = pci_read_long(nb, 0x44) & 0xfffffffe; |
| break; |
| case PCI_DEVICE_ID_INTEL_PM965: |
| case PCI_DEVICE_ID_INTEL_82Q35: |
| case PCI_DEVICE_ID_INTEL_82G33: |
| case PCI_DEVICE_ID_INTEL_82Q33: |
| mchbar_phys = pci_read_long(nb, 0x48) & 0xfffffffe; |
| mchbar_phys |= ((uint64_t)pci_read_long(nb, 0x4c)) << 32; |
| break; |
| case PCI_DEVICE_ID_INTEL_Q965: |
| case PCI_DEVICE_ID_INTEL_ATOM_DXXX: |
| case PCI_DEVICE_ID_INTEL_ATOM_NXXX: |
| mchbar_phys = pci_read_long(nb, 0x48); |
| |
| /* Test if bit 0 of the MCHBAR reg is 1 to enable memory reads. |
| * If it isn't, try to set it. This may fail, because there is |
| * some bit that locks that bit, and isn't in the public |
| * datasheets. |
| */ |
| |
| if(!(mchbar_phys & 1)) |
| { |
| printf("Access to the MCHBAR is currently disabled, "\ |
| "attempting to enable.\n"); |
| mchbar_phys |= 0x1; |
| pci_write_long(nb, 0x48, mchbar_phys); |
| if(pci_read_long(nb, 0x48) & 1) |
| printf("Enabled successfully.\n"); |
| else |
| printf("Enable FAILED!\n"); |
| } |
| mchbar_phys &= 0xfffffffe; |
| mchbar_phys |= ((uint64_t)pci_read_long(nb, 0x4c)) << 32; |
| break; |
| case PCI_DEVICE_ID_INTEL_82443LX: |
| case PCI_DEVICE_ID_INTEL_82443BX: |
| case PCI_DEVICE_ID_INTEL_82810: |
| case PCI_DEVICE_ID_INTEL_82810E_MC: |
| case PCI_DEVICE_ID_INTEL_82810DC: |
| case PCI_DEVICE_ID_INTEL_82830M: |
| printf("This northbridge does not have MCHBAR.\n"); |
| return 1; |
| case PCI_DEVICE_ID_INTEL_GS45: |
| case PCI_DEVICE_ID_INTEL_X44: |
| case PCI_DEVICE_ID_INTEL_32X0: |
| mchbar_phys = pci_read_long(nb, 0x48) & 0xfffffffe; |
| mchbar_phys |= ((uint64_t)pci_read_long(nb, 0x4c)) << 32; |
| break; |
| default: |
| printf("Error: Dumping MCHBAR on this northbridge is not (yet) supported.\n"); |
| return 1; |
| } |
| |
| mchbar = map_physical(mchbar_phys, size); |
| |
| if (mchbar == NULL) { |
| if (nb->device_id == PCI_DEVICE_ID_INTEL_82865) |
| perror("Error mapping BAR6"); |
| else |
| perror("Error mapping MCHBAR"); |
| exit(1); |
| } |
| |
| if (nb->device_id == PCI_DEVICE_ID_INTEL_82865) |
| printf("BAR6 = 0x%08llx (MEM)\n\n", mchbar_phys); |
| else |
| printf("MCHBAR = 0x%08llx (MEM)\n\n", mchbar_phys); |
| |
| for (i = 0; i < size; i += 4) { |
| if (*(uint32_t *)(mchbar + i)) |
| printf("0x%04x: 0x%08x\n", i, *(uint32_t *)(mchbar+i)); |
| } |
| |
| unmap_physical((void *)mchbar, size); |
| return 0; |
| } |
| |
| |