| /* |
| * 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 <inttypes.h> |
| #include "inteltool.h" |
| |
| volatile uint8_t *mchbar; |
| |
| static void write_mchbar32 (uint32_t addr, uint32_t val) |
| { |
| * (volatile uint32_t *) (mchbar + addr) = val; |
| } |
| |
| static uint32_t read_mchbar32 (uint32_t addr) |
| { |
| return * (volatile uint32_t *) (mchbar + addr); |
| } |
| |
| static uint8_t read_mchbar8 (uint32_t addr) |
| { |
| return * (volatile uint8_t *) (mchbar + addr); |
| } |
| |
| static u16 read_500 (int channel, u16 addr, int split) |
| { |
| uint32_t val; |
| write_mchbar32 (0x500 + (channel << 10), 0); |
| while (read_mchbar32 (0x500 + (channel << 10)) & 0x800000); |
| write_mchbar32 (0x500 + (channel << 10), 0x80000000 | (((read_mchbar8 (0x246 + (channel << 10)) >> 2) & 3) + 0xb88 - addr)); |
| while (read_mchbar32 (0x500 + (channel << 10)) & 0x800000); |
| val = read_mchbar32 (0x508 + (channel << 10)); |
| |
| return val & ((1 << split) - 1); |
| } |
| |
| static inline u16 get_lane_offset (int slot, int rank, int lane) |
| { |
| return 0x124 * lane + ((lane & 4) ? 0x23e : 0) + 11 * rank + 22 * slot - 0x452 * (lane == 8); |
| } |
| |
| static inline u16 get_timing_register_addr (int lane, int tm, int slot, int rank) |
| { |
| const u16 offs[] = { 0x1d, 0xa8, 0xe6, 0x5c }; |
| return get_lane_offset (slot, rank, lane) + offs[(tm + 3) % 4]; |
| } |
| |
| static void write_1d0 (u32 val, u16 addr, int bits, int flag) |
| { |
| write_mchbar32 (0x1d0, 0); |
| while (read_mchbar32 (0x1d0) & 0x800000); |
| write_mchbar32 (0x1d4, (val & ((1 << bits) - 1)) | (2 << bits) | (flag << bits)); |
| write_mchbar32 (0x1d0, 0x40000000 | addr); |
| while (read_mchbar32 (0x1d0) & 0x800000); |
| } |
| |
| static u16 read_1d0 (u16 addr, int split) |
| { |
| u32 val; |
| write_mchbar32 (0x1d0, 0); |
| while (read_mchbar32 (0x1d0) & 0x800000); |
| write_mchbar32 (0x1d0, 0x80000000 | (((read_mchbar8 (0x246) >> 2) & 3) + 0x361 - addr)); |
| while (read_mchbar32 (0x1d0) & 0x800000); |
| val = read_mchbar32 (0x1d8); |
| write_1d0 (0, 0x33d, 0, 0); |
| write_1d0 (0, 0x33d, 0, 0); |
| return val & ((1 << split) - 1); |
| } |
| |
| static void dump_timings (void) |
| { |
| int channel, slot, rank, lane, i; |
| printf ("Timings:\n"); |
| for (channel = 0; channel < 2; channel++) |
| for (slot = 0; slot < 2; slot++) |
| for (rank = 0; rank < 2; rank++) { |
| printf ("channel %d, slot %d, rank %d\n", channel, slot, rank); |
| for (lane = 0; lane < 9; lane++) { |
| printf ("lane %d: ", lane); |
| for (i = 0; i < 4; i++) { |
| printf ("%x ", read_500 (channel, |
| get_timing_register_addr (lane, i, slot, rank), 9)); |
| } |
| printf ("\n"); |
| } |
| } |
| |
| printf ("[178] = %x\n", read_1d0 (0x178, 7)); |
| printf ("[10b] = %x\n", read_1d0 (0x10b, 6)); |
| } |
| |
| |
| /* |
| * (G)MCH MMIO Config Space |
| */ |
| int print_mchbar(struct pci_dev *nb, struct pci_access *pacc) |
| { |
| int i, size = (16 * 1024); |
| 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_82965PM: |
| 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_82946: |
| case PCI_DEVICE_ID_INTEL_82Q965: |
| 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_DC: |
| case PCI_DEVICE_ID_INTEL_82810_DC: |
| case PCI_DEVICE_ID_INTEL_82830M: |
| printf("This northbridge does not have MCHBAR.\n"); |
| return 1; |
| case PCI_DEVICE_ID_INTEL_82X4X: |
| case PCI_DEVICE_ID_INTEL_82X38: |
| 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; |
| case PCI_DEVICE_ID_INTEL_CORE_1ST_GEN: |
| mchbar_phys = pci_read_long(nb, 0x48); |
| mchbar_phys |= ((uint64_t)pci_read_long(nb, 0x4c)) << 32; |
| mchbar_phys &= 0x0000000fffffc000UL; /* 35:14 */ |
| break; |
| case PCI_DEVICE_ID_INTEL_CORE_2ND_GEN: |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_A: /* pretty printing not implemented yet */ |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_B: |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_C: |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_D: |
| case PCI_DEVICE_ID_INTEL_CORE_4TH_GEN_U: |
| mchbar_phys = pci_read_long(nb, 0x48); |
| mchbar_phys |= ((uint64_t)pci_read_long(nb, 0x4c)) << 32; |
| mchbar_phys &= 0x0000007fffff8000UL; /* 38:15 */ |
| size = 32768; |
| 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%08" PRIx64 " (MEM)\n\n", mchbar_phys); |
| else |
| printf("MCHBAR = 0x%08" PRIx64 " (MEM)\n\n", mchbar_phys); |
| |
| for (i = 0; i < size; i += 4) { |
| if (*(uint32_t *)(mchbar + i)) |
| printf("0x%04x: 0x%08"PRIx32"\n", i, *(uint32_t *)(mchbar+i)); |
| } |
| |
| switch (nb->device_id) |
| { |
| case PCI_DEVICE_ID_INTEL_CORE_1ST_GEN: |
| printf ("clock_speed_index = %x\n", read_500 (0,0x609, 6) >> 1); |
| dump_timings (); |
| break; |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_A: |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_B: |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_C: |
| case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN_D: |
| case PCI_DEVICE_ID_INTEL_CORE_2ND_GEN: |
| ivybridge_dump_timings(); |
| break; |
| } |
| unmap_physical((void *)mchbar, size); |
| return 0; |
| } |
| |
| |