diff options
Diffstat (limited to 'util/inteltool/memory.c')
| -rw-r--r-- | util/inteltool/memory.c | 47 |
1 files changed, 40 insertions, 7 deletions
diff --git a/util/inteltool/memory.c b/util/inteltool/memory.c index 94796a9982..256204c563 100644 --- a/util/inteltool/memory.c +++ b/util/inteltool/memory.c @@ -25,15 +25,42 @@ /* * (G)MCH MMIO Config Space */ -int print_mchbar(struct pci_dev *nb) +int print_mchbar(struct pci_dev *nb, struct pci_access *pacc) { int i, size = (16 * 1024); volatile uint8_t *mchbar; - uint64_t mchbar_phys; + 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: @@ -54,8 +81,8 @@ int print_mchbar(struct pci_dev *nb) 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 + * 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. */ @@ -79,7 +106,7 @@ int print_mchbar(struct pci_dev *nb) case PCI_DEVICE_ID_INTEL_82810E_MC: case PCI_DEVICE_ID_INTEL_82810DC: case PCI_DEVICE_ID_INTEL_82830M: - printf("This northbrigde does not have MCHBAR.\n"); + printf("This northbridge does not have MCHBAR.\n"); return 1; case PCI_DEVICE_ID_INTEL_GS45: mchbar_phys = pci_read_long(nb, 0x48) & 0xfffffffe; @@ -93,11 +120,17 @@ int print_mchbar(struct pci_dev *nb) mchbar = map_physical(mchbar_phys, size); if (mchbar == NULL) { - perror("Error mapping MCHBAR"); + if (nb->device_id == PCI_DEVICE_ID_INTEL_82865) + perror("Error mapping BAR6"); + else + perror("Error mapping MCHBAR"); exit(1); } - printf("MCHBAR = 0x%08llx (MEM)\n\n", mchbar_phys); + 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)) |