diff options
Diffstat (limited to 'src/southbridge/intel/i82801xx')
| -rw-r--r-- | src/southbridge/intel/i82801xx/i82801xx.h | 4 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801xx/i82801xx_early_lpc.c | 40 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801xx/i82801xx_lpc.c | 1 |
3 files changed, 44 insertions, 1 deletions
diff --git a/src/southbridge/intel/i82801xx/i82801xx.h b/src/southbridge/intel/i82801xx/i82801xx.h index e5b2d33ba4..27ce21c207 100644 --- a/src/southbridge/intel/i82801xx/i82801xx.h +++ b/src/southbridge/intel/i82801xx/i82801xx.h @@ -34,6 +34,7 @@ extern void i82801xx_enable(device_t dev); #define GEN_PMCON_3 0xa4 #define PMBASE 0x40 +#define PMBASE_ADDR 0x0400 /* ACPI Base Address Register */ #define ACPI_CNTL 0x44 #define BIOS_CNTL 0x4E #define GPIO_BASE_ICH0_5 0x58 /* LPC GPIO Base Addr. Reg. (ICH0-ICH5) */ @@ -68,6 +69,9 @@ extern void i82801xx_enable(device_t dev); #define MTT 0x70 #define PCI_MAST_STS 0x82 +#define TCOBASE 0x60 /* TCO Base Address Register */ +#define TCO1_CNT 0x08 /* TCO1 Control Register */ + /* GEN_PMCON_3 bits */ #define RTC_BATTERY_DEAD (1 << 2) #define RTC_POWER_FAILED (1 << 1) diff --git a/src/southbridge/intel/i82801xx/i82801xx_early_lpc.c b/src/southbridge/intel/i82801xx/i82801xx_early_lpc.c new file mode 100644 index 0000000000..21b8fc2893 --- /dev/null +++ b/src/southbridge/intel/i82801xx/i82801xx_early_lpc.c @@ -0,0 +1,40 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008 Joseph Smith <joe@smittys.pointclark.net> + * + * 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); +} diff --git a/src/southbridge/intel/i82801xx/i82801xx_lpc.c b/src/southbridge/intel/i82801xx/i82801xx_lpc.c index 096be1a67e..17d4819c62 100644 --- a/src/southbridge/intel/i82801xx/i82801xx_lpc.c +++ b/src/southbridge/intel/i82801xx/i82801xx_lpc.c @@ -32,7 +32,6 @@ #include <arch/io.h> #include "i82801xx.h" -#define PMBASE_ADDR 0x00000400 /* ACPI Base Address Register */ #define GPIO_BASE_ADDR 0x00000500 /* GPIO Base Address Register */ #define NMI_OFF 0 |