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/*
* 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 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.
*/
static void i82801dx_halt_tco_timer(void)
{
/* Set the LPC device statically. */
pci_devfn_t dev = PCI_DEV(0x0, 0x1f, 0x0);
/* Temporarily set ACPI base address (I/O space). */
pci_write_config32(dev, PMBASE, (PMBASE_ADDR | 1));
/* 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);
}
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