sb/intel/common: Create a common implementation of `acpi_fill_madt()`

The function `acpi_fill_madt()` is identical among all the Lynx Point
boards and sb/intel/bd82x6x, so share a common function between them.

Earlier Intel platforms have similar implementations of this function.
The common implementation might only need minor alterations to support
them.

Tested on an ASRock H81M-HDS and Google Peppy (variant of Slippy). No
issues arose from this patch.

Change-Id: Ife9e3917febf43d8a92cac66b502e2dee8527556
Signed-off-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-on: https://review.coreboot.org/29388
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 36 insertions, 0 deletions

diff --git a/src/southbridge/intel/common/madt.c b/src/southbridge/intel/common/madt.c
new file mode 100644
index 0000000000..238e3c80cb
--- /dev/null
+++ b/src/southbridge/intel/common/madt.c
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ *
+ * 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.
+ */
+
+#include <arch/acpi.h>
+#include <arch/ioapic.h>
+#include <arch/smp/mpspec.h>
+
+unsigned long acpi_fill_madt(unsigned long current)
+{
+	/* Local APICs */
+	current = acpi_create_madt_lapics(current);
+
+	/* IOAPIC */
+	current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *) current,
+				2, IO_APIC_ADDR, 0);
+
+	/* INT_SRC_OVR */
+	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
+		 current, 0, 0, 2, 0);
+	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
+		 current, 0, 9, 9, MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH);
+
+	return current;
+}