| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2008 Joseph Smith <joe@settoplinux.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| */ |
| |
| static void i82801xx_halt_tco_timer(void) |
| { |
| device_t dev; |
| uint16_t halt_tco_timer; |
| |
| /* Set the LPC device statically. */ |
| dev = PCI_DEV(0x0, 0x1f, 0x0); |
| |
| /* Temporarily set ACPI base address (I/O space). */ |
| pci_write_config32(dev, PMBASE, (PMBASE_ADDR | 1)); |
| |
| /* Temporarily enable ACPI I/O. */ |
| pci_write_config8(dev, ACPI_CNTL, 0x10); |
| |
| /* Halt the TCO timer, preventing SMI and automatic reboot */ |
| outw(inw(PMBASE_ADDR + TCOBASE + TCO1_CNT) | (1 << 11), PMBASE_ADDR + TCOBASE + TCO1_CNT); |
| |
| /* Disable ACPI I/O. */ |
| pci_write_config8(dev, ACPI_CNTL, 0x00); |
| } |