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/*
* 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"
static const io_register_t sandybridge_mch_registers[] = {
/* Channel 0 */
{ 0x4000, 4, "TC_DBP_C0" }, // Timing of DDR Bin Parameters
{ 0x4004, 4, "TC_RAP_C0" }, // Timing of DDR Regular Access Parameters
{ 0x4028, 4, "SC_IO_LATENCY_C0" }, // IO Latency Configuration
{ 0x42A4, 4, "TC_SRFTP_C0" }, // Self-Refresh Timing Parameters
{ 0x40B0, 4, "PM_PDWN_config_C0" }, // Power-down Configuration
{ 0x4294, 4, "TC_RFP_C0" }, // Refresh Parameters
{ 0x4298, 4, "TC_RFTP_C0" }, // Refresh Timing Parameters
/* Channel 1 */
{ 0x4400, 4, "TC_DBP_C1" }, // Timing of DDR Bin Parameters
{ 0x4404, 4, "TC_RAP_C1" }, // Timing of DDR Regular Access Parameters
{ 0x4428, 4, "SC_IO_LATENCY_C1" }, // IO Latency Configuration
{ 0x46A4, 4, "TC_SRFTP_C1" }, // Self-Refresh Timing Parameters
{ 0x44B0, 4, "PM_PDWN_config_C1" }, // Power-down Configuration
{ 0x4694, 4, "TC_RFP_C1" }, // Refresh Parameters
{ 0x4698, 4, "TC_RFTP_C1" }, // Refresh Timing Parameters
/* Integrated Memory Peripheral Hub (IMPH) */
{ 0x740C, 4, "CRDTCTL3" }, // Credit Control 3
/* Common Registers */
{ 0x5000, 4, "MAD_CHNL" }, // Address decoder Channel Configuration
{ 0x5004, 4, "MAD_DIMM_ch0" }, // Address Decode Channel 0
{ 0x5008, 4, "MAD_DIMM_ch1" }, // Address Decode Channel 1
{ 0x5060, 4, "PM_SREF_config" }, // Self Refresh Configuration
/* MMIO Registers Broadcast Group */
{ 0x4CB0, 4, "PM_PDWN_config" }, // Power-down Configuration
{ 0x4F84, 4, "PM_CMD_PWR" }, // Power Management Command Power
{ 0x4F88, 4, "PM_BW_LIMIT_config" }, // BW Limit Configuration
{ 0x4F8C, 4, "RESERVED" }, // Reserved, default value - 0xFF1D1519
/* PCU MCHBAR Registers */
{ 0x5880, 4, "MEM_TRML_ESTIMATION_CONFIG" }, // Memory Thermal Estimation Configuration
{ 0x5884, 4, "RESERVED" }, // Reserved
{ 0x5888, 4, "MEM_TRML_THRESHOLDS_CONFIG" }, // Memory Thermal Thresholds Configuration
{ 0x58A0, 4, "MEM_TRML_STATUS_REPORT" }, // Memory Thermal Status Report
{ 0x58A4, 4, "MEM_TRML_TEMPERATURE_REPORT" }, // Memory Thermal Temperature Report
{ 0x58A8, 4, "MEM_TRML_INTERRUPT" }, // Memory Thermal Interrupt
{ 0x5948, 4, "GT_PERF_STATUS" }, // GT Performance Status
{ 0x5998, 4, "RP_STATE_CAP" }, // RP State Capability
{ 0x5D10, 8, "SSKPD" }, // Sticky Scratchpad Data
};
/*
* (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;
const io_register_t *mch_registers = NULL;
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_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 */
mch_registers = NULL; /* No public documentation */
break;
case PCI_DEVICE_ID_INTEL_CORE_2ND_GEN:
mch_registers = sandybridge_mch_registers;
size = ARRAY_SIZE(sandybridge_mch_registers);
case PCI_DEVICE_ID_INTEL_CORE_3RD_GEN: /* pretty printing not implemented yet */
mchbar_phys = pci_read_long(nb, 0x48);
mchbar_phys |= ((uint64_t)pci_read_long(nb, 0x4c)) << 32;
mchbar_phys &= 0x0000007fffff8000UL; /* 38:15 */
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);
if (mch_registers != NULL) {
printf("%d registers:\n", size);
for (i = 0; i < size; i++) {
switch (mch_registers[i].size) {
case 8:
printf("mchbase+0x%04x: 0x%016lx (%s)\n",
mch_registers[i].addr,
*(uint64_t *)(mchbar+mch_registers[i].addr),
mch_registers[i].name);
break;
case 4:
printf("mchbase+0x%04x: 0x%08x (%s)\n",
mch_registers[i].addr,
*(uint32_t *)(mchbar+mch_registers[i].addr),
mch_registers[i].name);
break;
case 2:
printf("mchbase+0x%04x: 0x%04x (%s)\n",
mch_registers[i].addr,
*(uint16_t *)(mchbar+mch_registers[i].addr),
mch_registers[i].name);
break;
case 1:
printf("mchbase+0x%04x: 0x%02x (%s)\n",
mch_registers[i].addr,
*(uint8_t *)(mchbar+mch_registers[i].addr),
mch_registers[i].name);
break;
}
}
} else {
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;
}
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