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authorJoseph Smith <joe@smittys.pointclark.net>2008-04-06 04:26:19 +0000
committerJoseph Smith <joe@smittys.pointclark.net>2008-04-06 04:26:19 +0000
commit0dc5697220773719cd18e23c795c55f864f03a1d (patch)
treef7d8c73d8331967201d54af8a2ff90aa73da1d42 /src
parent3860404b651d7c92c86a9789f9c163efb7ec9c8a (diff)
downloadcoreboot-0dc5697220773719cd18e23c795c55f864f03a1d.tar.xz
This patch halts the tco timer early in the boot process on all ICH series southbridges.
It also keeps the boot processes from rebooting through out the coreboot process. Signed-off-by: Joseph Smith <joe@smittys.pointclark.net> Acked-by: Corey Osgood <corey.osgood@gmail.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3218 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src')
-rw-r--r--src/mainboard/rca/rm4100/auto.c21
-rw-r--r--src/southbridge/intel/i82801xx/i82801xx.h4
-rw-r--r--src/southbridge/intel/i82801xx/i82801xx_early_lpc.c40
-rw-r--r--src/southbridge/intel/i82801xx/i82801xx_lpc.c1
4 files changed, 46 insertions, 20 deletions
diff --git a/src/mainboard/rca/rm4100/auto.c b/src/mainboard/rca/rm4100/auto.c
index cff36d23fb..f4e05e9473 100644
--- a/src/mainboard/rca/rm4100/auto.c
+++ b/src/mainboard/rca/rm4100/auto.c
@@ -42,6 +42,7 @@
#define SERIAL_DEV PNP_DEV(0x2e, SMSCSUPERIO_SP1)
#include "southbridge/intel/i82801xx/i82801xx_early_smbus.c"
+#include "southbridge/intel/i82801xx/i82801xx_early_lpc.c"
/**
* The onboard 128MB PC133 memory does not have a SPD EEPROM so the
@@ -69,24 +70,6 @@ static inline int spd_read_byte(unsigned device, unsigned address)
#include "sdram/generic_sdram.c"
/**
- * We have to disable the TCO Timer system reboot feature
- * or we get several reboots through out the boot processes.
- */
-static void disable_tco_timer(void)
-{
- device_t dev;
- u8 reg8;
-
- /* Set the LPC device statically. */
- dev = PCI_DEV(0x0, 0x1f, 0x0);
-
- /* Disable the TCO Timer system reboot feature. */
- reg8 = pci_read_config8(dev, 0xd4);
- reg8 |= (1 << 1);
- pci_write_config8(dev, 0xd4, reg8);
-}
-
-/**
* The AC'97 Audio Controller I/O space registers are read only by default
* so we need to enable them by setting register 0x41 to 0x01.
*/
@@ -131,6 +114,6 @@ static void main(unsigned long bist)
/* ram_check(0, 640 * 1024); */
/* ram_check(130048 * 1024, 131072 * 1024); */
- disable_tco_timer();
+ i82801xx_halt_tco_timer();
ac97_io_enable();
}
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