1 files changed, 68 insertions, 0 deletions
diff --git a/src/northbridge/intel/ironlake/acpi.c b/src/northbridge/intel/ironlake/acpi.c
new file mode 100644
index 0000000000..198b6ecbc5
--- /dev/null
+++ b/src/northbridge/intel/ironlake/acpi.c
@@ -0,0 +1,68 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2012 The Chromium OS Authors
+ * Copyright (C) 2013 Vladimir Serbinenko
+ *
+ * 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.
+ */
+
+#define __SIMPLE_DEVICE__
+
+#include <types.h>
+#include <device/device.h>
+#include <device/pci_ops.h>
+#include "ironlake.h"
+
+unsigned long acpi_fill_mcfg(unsigned long current)
+{
+	u32 pciexbar = 0;
+	u32 pciexbar_reg;
+	int max_buses;
+
+	pciexbar_reg = pci_read_config32(PCI_DEV(QUICKPATH_BUS, 0, 1), 0x50);
+
+	// MMCFG not supported or not enabled.
+	if (!(pciexbar_reg & (1 << 0)))
+		return current;
+
+	switch ((pciexbar_reg >> 1) & 3) {
+	case 0:		// 256MB
+		pciexbar =
+		    pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+				    (1 << 28));
+		max_buses = 256;
+		break;
+	case 1:		// 128M
+		pciexbar =
+		    pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+				    (1 << 28) | (1 << 27));
+		max_buses = 128;
+		break;
+	case 2:		// 64M
+		pciexbar =
+		    pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+				    (1 << 28) | (1 << 27) | (1 << 26));
+		max_buses = 64;
+		break;
+	default:		// RSVD
+		return current;
+	}
+
+	if (!pciexbar)
+		return current;
+
+	current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current,
+					     pciexbar, 0x0, 0x0, max_buses - 1);
+
+	return current;
+}