diff options
| -rw-r--r-- | src/mainboard/intel/mtarvon/auto.c | 3 | ||||
| -rw-r--r-- | src/southbridge/intel/i3100/i3100_early_lpc.c | 20 | ||||
| -rw-r--r-- | src/southbridge/intel/i3100/i3100_lpc.c | 2 |
3 files changed, 24 insertions, 1 deletions
diff --git a/src/mainboard/intel/mtarvon/auto.c b/src/mainboard/intel/mtarvon/auto.c index 643e9841ec..dd4b76346c 100644 --- a/src/mainboard/intel/mtarvon/auto.c +++ b/src/mainboard/intel/mtarvon/auto.c @@ -90,6 +90,9 @@ static void main(unsigned long bist) uart_init(); console_init(); + /* Prevent the TCO timer from rebooting us */ + i3100_halt_tco_timer(); + /* Halt if there was a built in self test failure */ report_bist_failure(bist); diff --git a/src/southbridge/intel/i3100/i3100_early_lpc.c b/src/southbridge/intel/i3100/i3100_early_lpc.c index 2fdb3dfa09..fbefcd6acb 100644 --- a/src/southbridge/intel/i3100/i3100_early_lpc.c +++ b/src/southbridge/intel/i3100/i3100_early_lpc.c @@ -30,3 +30,23 @@ static void i3100_enable_superio(void) /* Enable decoding of I/O locations for SuperIO devices */ pci_write_config16(dev, 0x82, 0x340f); } + +static void i3100_halt_tco_timer(void) +{ + device_t dev; + dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_3100_LPC), 0); + if (dev == PCI_DEV_INVALID) { + die("LPC bridge not found\r\n"); + } + + /* Temporarily enable the ACPI I/O range at 0x4000 */ + pci_write_config32(dev, 0x40, 0x4000 | (1 << 0)); + pci_write_config32(dev, 0x44, pci_read_config32(dev, 0x44) | (1 << 7)); + + /* Halt the TCO timer, preventing SMI and automatic reboot */ + outw(inw(0x4068) | (1 << 11), 0x4068); + + /* Disable the ACPI I/O range */ + pci_write_config32(dev, 0x44, pci_read_config32(dev, 0x44) & ~(1 << 7)); +} diff --git a/src/southbridge/intel/i3100/i3100_lpc.c b/src/southbridge/intel/i3100/i3100_lpc.c index 8914ed73de..b4fd5ca6d2 100644 --- a/src/southbridge/intel/i3100/i3100_lpc.c +++ b/src/southbridge/intel/i3100/i3100_lpc.c @@ -276,7 +276,7 @@ static void i3100_lpc_enable_resources(device_t dev) /* Enable the ACPI bar */ acpi_cntl = pci_read_config8(dev, 0x44); - acpi_cntl |= (1 << 4); + acpi_cntl |= (1 << 7); pci_write_config8(dev, 0x44, acpi_cntl); /* Enable the GPIO bar */ |