diff options
| author | Stefan Reinauer <stepan@coresystems.de> | 2010-03-01 08:34:19 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2010-03-01 08:34:19 +0000 |
| commit | 800379f7aa07ca54898faa2c51e6f41ea5b228df (patch) | |
| tree | 0f01be5464706eb68d9490df0463a3d9d25e2574 /src/southbridge/intel/i82801dx/i82801dx_tco_timer.c | |
| parent | 75bf053fd65bd962fe7a144eb4956f47d9e43d35 (diff) | |
This patch implements MBI (modular bios interface) support to the i830 chipset.
This is needed on the IP1000T to get VGA output. The VGA option rom will ask
through an SMI for hardware specifics (in form of a VBT, video bios table)
which the SMI handler copies into the VGA option rom.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5177 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/intel/i82801dx/i82801dx_tco_timer.c')
| -rw-r--r-- | src/southbridge/intel/i82801dx/i82801dx_tco_timer.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801dx/i82801dx_tco_timer.c b/src/southbridge/intel/i82801dx/i82801dx_tco_timer.c new file mode 100644 index 0000000000..ea5485f799 --- /dev/null +++ b/src/southbridge/intel/i82801dx/i82801dx_tco_timer.c @@ -0,0 +1,37 @@ +/* + * 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 i82801dx_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)); + + /* 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); +} |