baytrail: interrupt routing support

This provides the initial support for interrupt routing
in bay trail. It includes both acpi changes and board changes
to ensure the interdependencies are met with the current ASL
code. The PIRQ routing is handled by the mainboard exporting
an irqroute.h header that describes the per device and PIRQ
PCI settings.

There are still a lot of ACPI errors in the kernel with this
change, though.

BUG=chrome-os-partner:23505
BRANCH=None
TEST=Built and booted rambi into kernel.

Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Change-Id: Id8a865a24fc8d49743c0b54efdb64aaef52fcd8e
Reviewed-on: https://chromium-review.googlesource.com/175700
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/4940
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

16 files changed, 1075 insertions, 60 deletions

diff --git a/src/mainboard/google/rambi/Makefile.inc b/src/mainboard/google/rambi/Makefile.inc
index 77b2f2cb73..1b15ad7adf 100644
--- a/src/mainboard/google/rambi/Makefile.inc
+++ b/src/mainboard/google/rambi/Makefile.inc
@@ -23,5 +23,6 @@ romstage-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-$(CONFIG_CHROMEOS) += gpio.c
 ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC) += ec.c
+ramstage-y += irqroute.c
 
 smm-$(CONFIG_HAVE_SMI_HANDLER) += mainboard_smi.c
diff --git a/src/mainboard/google/rambi/acpi/ec.asl b/src/mainboard/google/rambi/acpi/ec.asl
index 9ae5951aca..9a4cd4a1a8 100644
--- a/src/mainboard/google/rambi/acpi/ec.asl
+++ b/src/mainboard/google/rambi/acpi/ec.asl
@@ -1,37 +1,24 @@
-Device (EC0)
-{
-	Name (_HID, EISAID ("PNP0C09"))
-	Name (_UID, 1)
-	Name (_GPE, 10) // GPIO 10 is SMC_RUNTIME_SCI_N
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
 
-	OperationRegion (ERAM, EmbeddedControl, 0x00, 0xff)
-	Field (ERAM, ByteAcc, Lock, Preserve)
-	{
-		Offset (0x03),
-		ACPR, 1,	// AC Power (1=present)
-		    , 2,
-		CFAN, 1,	// CPU Fan (1=on)
-		    , 2,
-		LIDS, 1,	// Lid State (1=open)
-		    , 1,
-		SPTR, 8,	// SMBUS Protocol Register
-		SSTS, 8,	// SMBUS Status Register
-		SADR, 8,	// SMBUS Address Register
-		SCMD, 8,	// SMBUS Command Register
-		SBFR, 256,	// SMBUS Block Buffer
-		SCNT, 8,	// SMBUS Block Count
+/* mainboard configuration */
+#include <mainboard/google/rambi/ec.h>
 
-		Offset (0x3a),
-		ECMD, 8,	// EC Command Register
-
-		Offset (0x82),
-		PECL, 8,	// PECI fractional (1/64 Celsius)
-		PECH, 8,	// PECI integer (Celsius)
-	}
-
-	Name (_CRS, ResourceTemplate()
-	{
-		IO (Decode16, 0x62, 0x62, 0, 1)
-		IO (Decode16, 0x66, 0x66, 0, 1)
-	})
-}
+/* ACPI code for EC functions */
+#include <ec/google/chromeec/acpi/ec.asl>
diff --git a/src/mainboard/google/rambi/acpi/mainboard.asl b/src/mainboard/google/rambi/acpi/mainboard.asl
index 3e0eb339ee..948d7dfe87 100644
--- a/src/mainboard/google/rambi/acpi/mainboard.asl
+++ b/src/mainboard/google/rambi/acpi/mainboard.asl
@@ -1,7 +1,7 @@
 /*
  * This file is part of the coreboot project.
  *
- * Copyright (C) 2011 Google Inc.
+ * Copyright (C) 2012 Google Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -19,10 +19,20 @@
  * MA 02110-1301 USA
  */
 
-Device (PWRB)
+Scope (\_SB)
 {
-	Name(_HID, EisaId("PNP0C0C"))
+	Device (LID0)
+	{
+		Name(_HID, EisaId("PNP0C0D"))
+		Method(_LID, 0)
+		{
+			Store (\_SB.PCI0.LPCB.EC0.LIDS, \LIDS)
+			Return (\LIDS)
+		}
+	}
 
-	// Wake from deep sleep via GPIO27
-	Name(_PRW, Package(){27, 4})
+	Device (PWRB)
+	{
+		Name(_HID, EisaId("PNP0C0C"))
+	}
 }
diff --git a/src/mainboard/google/rambi/dsdt.asl b/src/mainboard/google/rambi/dsdt.asl
index 55e44b586e..1fbb8eb537 100644
--- a/src/mainboard/google/rambi/dsdt.asl
+++ b/src/mainboard/google/rambi/dsdt.asl
@@ -18,8 +18,6 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include <soc/intel/baytrail/baytrail/iomap.h>
-
 #define ENABLE_TPM
 
 DefinitionBlock(
@@ -32,14 +30,15 @@ DefinitionBlock(
 )
 {
 	// Some generic macros
-	#include "acpi/platform.asl"
+	#include <soc/intel/baytrail/acpi/platform.asl>
+	#include "acpi/mainboard.asl"
 
 	// global NVS and variables
 	#include <soc/intel/baytrail/acpi/globalnvs.asl>
 
 	//#include "acpi/thermal.asl"
 
-	//#include <soc/intel/baytrail/acpi/cpu.asl>
+	#include <soc/intel/baytrail/acpi/cpu.asl>
 
 	Scope (\_SB) {
 		Device (PCI0)
diff --git a/src/mainboard/google/rambi/irqroute.c b/src/mainboard/google/rambi/irqroute.c
new file mode 100644
index 0000000000..552be8f605
--- /dev/null
+++ b/src/mainboard/google/rambi/irqroute.c
@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#include "irqroute.h"
+
+DEFINE_IRQ_ROUTES;
diff --git a/src/mainboard/google/rambi/irqroute.h b/src/mainboard/google/rambi/irqroute.h
new file mode 100644
index 0000000000..20f421b5b8
--- /dev/null
+++ b/src/mainboard/google/rambi/irqroute.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#include <soc/intel/baytrail/baytrail/irq.h>
+#include <soc/intel/baytrail/baytrail/pci_devs.h>
+
+#define PCI_DEV_PIRQ_ROUTES \
+	PCI_DEV_PIRQ_ROUTE(GFX_DEV,  A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(SDIO_DEV, A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(SD_DEV,   A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(SATA_DEV, A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(XHCI_DEV, A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(LPE_DEV,  A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(MMC_DEV,  A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(SIO1_DEV, A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(TXE_DEV,  A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(HDA_DEV,  A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(PCIE_DEV, A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(EHCI_DEV, A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(SIO2_DEV, A, B, C, D), \
+	PCI_DEV_PIRQ_ROUTE(PCU_DEV,  A, B, C, D)
+
+#define PIRQ_PIC_ROUTES \
+	PIRQ_PIC(A, DISABLE), \
+	PIRQ_PIC(B, DISABLE), \
+	PIRQ_PIC(C, DISABLE), \
+	PIRQ_PIC(D, DISABLE), \
+	PIRQ_PIC(E, DISABLE), \
+	PIRQ_PIC(F, DISABLE), \
+	PIRQ_PIC(G, DISABLE), \
+	PIRQ_PIC(H, DISABLE)
diff --git a/src/soc/intel/baytrail/acpi/cpu.asl b/src/soc/intel/baytrail/acpi/cpu.asl
new file mode 100644
index 0000000000..16f62ba309
--- /dev/null
+++ b/src/soc/intel/baytrail/acpi/cpu.asl
@@ -0,0 +1,77 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+/* These devices are created at runtime */
+External (\_PR.CPU0, DeviceObj)
+External (\_PR.CPU1, DeviceObj)
+External (\_PR.CPU2, DeviceObj)
+External (\_PR.CPU3, DeviceObj)
+
+/* Notify OS to re-read CPU tables, assuming ^2 CPU count */
+Method (PNOT)
+{
+	If (LGreaterEqual (\PCNT, 2)) {
+		Notify (\_PR.CPU0, 0x81)  // _CST
+		Notify (\_PR.CPU1, 0x81)  // _CST
+	}
+	If (LGreaterEqual (\PCNT, 4)) {
+		Notify (\_PR.CPU2, 0x81)  // _CST
+		Notify (\_PR.CPU3, 0x81)  // _CST
+	}
+}
+
+/* Notify OS to re-read CPU _PPC limit, assuming ^2 CPU count */
+Method (PPCN)
+{
+	If (LGreaterEqual (\PCNT, 2)) {
+		Notify (\_PR.CPU0, 0x80)  // _PPC
+		Notify (\_PR.CPU1, 0x80)  // _PPC
+	}
+	If (LGreaterEqual (\PCNT, 4)) {
+		Notify (\_PR.CPU2, 0x80)  // _PPC
+		Notify (\_PR.CPU3, 0x80)  // _PPC
+	}
+}
+
+/* Notify OS to re-read Throttle Limit tables, assuming ^2 CPU count */
+Method (TNOT)
+{
+	If (LGreaterEqual (\PCNT, 2)) {
+		Notify (\_PR.CPU0, 0x82)  // _TPC
+		Notify (\_PR.CPU1, 0x82)  // _TPC
+	}
+	If (LGreaterEqual (\PCNT, 4)) {
+		Notify (\_PR.CPU2, 0x82)  // _TPC
+		Notify (\_PR.CPU3, 0x82)  // _TPC
+	}
+}
+
+/* Return a package containing enabled processor entries */
+Method (PPKG)
+{
+	If (LGreaterEqual (\PCNT, 4)) {
+		Return (Package() {\_PR.CPU0, \_PR.CPU1, \_PR.CPU2, \_PR.CPU3})
+	} ElseIf (LGreaterEqual (\PCNT, 2)) {
+		Return (Package() {\_PR.CPU0, \_PR.CPU1})
+	} Else {
+		Return (Package() {\_PR.CPU0})
+	}
+}
diff --git a/src/soc/intel/baytrail/acpi/irq_helper.h b/src/soc/intel/baytrail/acpi/irq_helper.h
new file mode 100644
index 0000000000..b19895b583
--- /dev/null
+++ b/src/soc/intel/baytrail/acpi/irq_helper.h
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#undef PCI_DEV_PIRQ_ROUTES
+#undef ACPI_DEV_APIC_IRQ
+#undef PCI_DEV_PIRQ_ROUTE
+#undef PIRQ_PIC_ROUTES
+#undef PIRQ_PIC
+
+#if defined(PIC_MODE)
+
+#define ACPI_DEV_APIC_IRQ(dev_, pin_, pin_name_) \
+	Package() { ## dev_ ## ffff, pin_, \_SB.PCI0.LPCB.LNK ## pin_name_, 0 }
+
+#else /* defined(PIC_MODE) */
+
+#define ACPI_DEV_APIC_IRQ(dev_, pin_, pin_name_) \
+	Package() { ## dev_ ## ffff, pin_, 0, PIRQ ## pin_name_ ## _APIC_IRQ }
+
+#endif
+
+#define PCI_DEV_PIRQ_ROUTE(dev_, a_, b_, c_, d_) \
+	ACPI_DEV_APIC_IRQ(dev_, 0, a_), \
+	ACPI_DEV_APIC_IRQ(dev_, 1, b_), \
+	ACPI_DEV_APIC_IRQ(dev_, 2, c_), \
+	ACPI_DEV_APIC_IRQ(dev_, 3, d_)
+
+/* Empty PIRQ_PIC definition. */
+#define PIRQ_PIC(pirq_, pic_irq_)
+
+/* Include the mainboard irq route definition. */
+#include "irqroute.h"
diff --git a/src/soc/intel/baytrail/acpi/irqlinks.asl b/src/soc/intel/baytrail/acpi/irqlinks.asl
new file mode 100644
index 0000000000..5fcee45f29
--- /dev/null
+++ b/src/soc/intel/baytrail/acpi/irqlinks.asl
@@ -0,0 +1,493 @@
+/*
+ * 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.
+ *
+ * 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
+ */
+
+Device (LNKA)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 1)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTA)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 10, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLA, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLA, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTA
+		ShiftLeft(1, And(PRTA, 0x0f), IRQ0)
+
+		Return (RTLA)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTA)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTA, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
+Device (LNKB)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 2)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTB)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 11, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLB, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLB, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTB
+		ShiftLeft(1, And(PRTB, 0x0f), IRQ0)
+
+		Return (RTLB)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTB)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTB, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
+Device (LNKC)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 3)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTC)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 10, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLC, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLC, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTC
+		ShiftLeft(1, And(PRTC, 0x0f), IRQ0)
+
+		Return (RTLC)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTC)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTC, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
+Device (LNKD)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 4)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTD)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 11, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLD, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLD, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTD
+		ShiftLeft(1, And(PRTD, 0x0f), IRQ0)
+
+		Return (RTLD)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTD)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTD, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
+Device (LNKE)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 5)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTE)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 10, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLE, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLE, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTE
+		ShiftLeft(1, And(PRTE, 0x0f), IRQ0)
+
+		Return (RTLE)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTE)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTE, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
+Device (LNKF)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 6)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTF)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 11, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLF, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLF, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTF
+		ShiftLeft(1, And(PRTF, 0x0f), IRQ0)
+
+		Return (RTLF)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTF)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTF, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
+Device (LNKG)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 7)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTG)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 10, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLG, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLG, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTG
+		ShiftLeft(1, And(PRTG, 0x0f), IRQ0)
+
+		Return (RTLG)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTG)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTG, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
+Device (LNKH)
+{
+	Name (_HID, EISAID("PNP0C0F"))
+	Name (_UID, 8)
+
+	// Disable method
+	Method (_DIS, 0, Serialized)
+	{
+		Store (0x80, PRTH)
+	}
+
+	// Possible Resource Settings for this Link
+	Name (_PRS, ResourceTemplate()
+	{
+		IRQ(Level, ActiveLow, Shared)
+			{ 1, 3, 4, 5, 6, 7, 11, 12, 14, 15 }
+	})
+
+	// Current Resource Settings for this link
+	Method (_CRS, 0, Serialized)
+	{
+		Name (RTLH, ResourceTemplate()
+		{
+			IRQ(Level, ActiveLow, Shared) {}
+		})
+		CreateWordField(RTLH, 1, IRQ0)
+
+		// Clear the WordField
+		Store (Zero, IRQ0)
+
+		// Set the bit from PRTH
+		ShiftLeft(1, And(PRTH, 0x0f), IRQ0)
+
+		Return (RTLH)
+	}
+
+	// Set Resource Setting for this IRQ link
+	Method (_SRS, 1, Serialized)
+	{
+		CreateWordField(Arg0, 1, IRQ0)
+
+		// Which bit is set?
+		FindSetRightBit(IRQ0, Local0)
+
+		Decrement(Local0)
+		Store(Local0, PRTH)
+	}
+
+	// Status
+	Method (_STA, 0, Serialized)
+	{
+		If(And(PRTH, 0x80)) {
+			Return (0x9)
+		} Else {
+			Return (0xb)
+		}
+	}
+}
+
diff --git a/src/soc/intel/baytrail/acpi/irqroute.asl b/src/soc/intel/baytrail/acpi/irqroute.asl
new file mode 100644
index 0000000000..23987d7d2a
--- /dev/null
+++ b/src/soc/intel/baytrail/acpi/irqroute.asl
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2013 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+// PCI Interrupt Routing
+Method(_PRT)
+{
+	If (PICM) {
+		Return (Package() {
+			#undef PIC_MODE
+			#include <soc/intel/baytrail/acpi/irq_helper.h>
+			PCI_DEV_PIRQ_ROUTES
+		})
+	} Else {
+		Return (Package() {
+			#define PIC_MODE
+			#include <soc/intel/baytrail/acpi/irq_helper.h>
+			PCI_DEV_PIRQ_ROUTES
+		})
+	}
+}
diff --git a/src/soc/intel/baytrail/acpi/lpc.asl b/src/soc/intel/baytrail/acpi/lpc.asl
new file mode 100644
index 0000000000..24fa9c7b5d
--- /dev/null
+++ b/src/soc/intel/baytrail/acpi/lpc.asl
@@ -0,0 +1,164 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2013 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+// Intel LPC Bus Device  - 0:1f.0
+
+Device (LPCB)
+{
+	Name(_ADR, 0x001f0000)
+
+	#include "irqlinks.asl"
+
+	#include "acpi/ec.asl"
+
+	Device (DMAC)		// DMA Controller
+	{
+		Name(_HID, EISAID("PNP0200"))
+		Name(_CRS, ResourceTemplate()
+		{
+			IO (Decode16, 0x00, 0x00, 0x01, 0x20)
+			IO (Decode16, 0x81, 0x81, 0x01, 0x11)
+			IO (Decode16, 0x93, 0x93, 0x01, 0x0d)
+			IO (Decode16, 0xc0, 0xc0, 0x01, 0x20)
+			DMA (Compatibility, NotBusMaster, Transfer8_16) { 4 }
+		})
+	}
+
+	Device (FWH)		// Firmware Hub
+	{
+		Name (_HID, EISAID("INT0800"))
+		Name (_CRS, ResourceTemplate()
+		{
+			Memory32Fixed(ReadOnly, 0xff000000, 0x01000000)
+		})
+	}
+
+	Device (HPET)
+	{
+		Name (_HID, EISAID("PNP0103"))
+		Name (_CID, 0x010CD041)
+
+		Method (_STA, 0)	// Device Status
+		{
+			Return (0xf)	// Enable and show device
+		}
+
+		Name(_CRS, ResourceTemplate()
+		{
+			Memory32Fixed(ReadOnly, 0xfed00000, 0x400)
+		})
+	}
+
+	Device(PIC)	// 8259 Interrupt Controller
+	{
+		Name(_HID,EISAID("PNP0000"))
+		Name(_CRS, ResourceTemplate()
+		{
+			IO (Decode16, 0x20, 0x20, 0x01, 0x02)
+			IO (Decode16, 0x24, 0x24, 0x01, 0x02)
+			IO (Decode16, 0x28, 0x28, 0x01, 0x02)
+			IO (Decode16, 0x2c, 0x2c, 0x01, 0x02)
+			IO (Decode16, 0x30, 0x30, 0x01, 0x02)
+			IO (Decode16, 0x34, 0x34, 0x01, 0x02)
+			IO (Decode16, 0x38, 0x38, 0x01, 0x02)
+			IO (Decode16, 0x3c, 0x3c, 0x01, 0x02)
+			IO (Decode16, 0xa0, 0xa0, 0x01, 0x02)
+			IO (Decode16, 0xa4, 0xa4, 0x01, 0x02)
+			IO (Decode16, 0xa8, 0xa8, 0x01, 0x02)
+			IO (Decode16, 0xac, 0xac, 0x01, 0x02)
+			IO (Decode16, 0xb0, 0xb0, 0x01, 0x02)
+			IO (Decode16, 0xb4, 0xb4, 0x01, 0x02)
+			IO (Decode16, 0xb8, 0xb8, 0x01, 0x02)
+			IO (Decode16, 0xbc, 0xbc, 0x01, 0x02)
+			IO (Decode16, 0x4d0, 0x4d0, 0x01, 0x02)
+			IRQNoFlags () { 2 }
+		})
+	}
+
+	Device(LDRC)	// LPC device: Resource consumption
+	{
+		Name (_HID, EISAID("PNP0C02"))
+		Name (_UID, 2)
+
+		Name (RBUF, ResourceTemplate()
+		{
+			IO (Decode16, 0x61, 0x61, 0x1, 0x01) // NMI Status
+			IO (Decode16, 0x63, 0x63, 0x1, 0x01) // CPU Reserved
+			IO (Decode16, 0x65, 0x65, 0x1, 0x01) // CPU Reserved
+			IO (Decode16, 0x67, 0x67, 0x1, 0x01) // CPU Reserved
+			IO (Decode16, 0x80, 0x80, 0x1, 0x01) // Port 80 Post
+			IO (Decode16, 0x92, 0x92, 0x1, 0x01) // CPU Reserved
+			IO (Decode16, 0xb2, 0xb2, 0x1, 0x02) // SWSMI
+		})
+
+		Method (_CRS, 0, NotSerialized)
+		{
+			Return (RBUF)
+		}
+	}
+
+	Device (RTC)	// Real Time Clock
+	{
+		Name (_HID, EISAID("PNP0B00"))
+		Name (_CRS, ResourceTemplate()
+		{
+			IO (Decode16, 0x70, 0x70, 1, 8)
+// Disable as Windows doesn't like it, and systems don't seem to use it.
+//			IRQNoFlags() { 8 }
+		})
+	}
+
+	Device (TIMR)	// Intel 8254 timer
+	{
+		Name(_HID, EISAID("PNP0100"))
+		Name(_CRS, ResourceTemplate()
+		{
+			IO (Decode16, 0x40, 0x40, 0x01, 0x04)
+			IO (Decode16, 0x50, 0x50, 0x10, 0x04)
+			IRQNoFlags() {0}
+		})
+	}
+
+#ifdef ENABLE_TPM
+	Device (TPM)		// Trusted Platform Module
+	{
+		Name(_HID, EISAID("IFX0102"))
+		Name(_CID, 0x310cd041)
+		Name(_UID, 1)
+
+		Method(_STA, 0)
+		{
+			If (TPMP) {
+				Return (0xf)
+			}
+			Return (0x0)
+		}
+
+		Name(_CRS, ResourceTemplate() {
+			IO (Decode16, 0x2e, 0x2e, 0x01, 0x02)
+			IO (Decode16, 0x6f0, 0x6f0, 0x01, 0x10)
+			Memory32Fixed (ReadWrite, 0xfed40000, 0x5000)
+			IRQ (Edge, Activehigh, Exclusive) { 6 }
+		})
+	}
+#endif
+}
diff --git a/src/mainboard/google/rambi/acpi/platform.asl b/src/soc/intel/baytrail/acpi/platform.asl
index e0693928fa..e0693928fa 100644
--- a/src/mainboard/google/rambi/acpi/platform.asl
+++ b/src/soc/intel/baytrail/acpi/platform.asl
diff --git a/src/soc/intel/baytrail/acpi/southcluster.asl b/src/soc/intel/baytrail/acpi/southcluster.asl
index 87b5b6e386..7aabcf3fa0 100644
--- a/src/soc/intel/baytrail/acpi/southcluster.asl
+++ b/src/soc/intel/baytrail/acpi/southcluster.asl
@@ -19,6 +19,8 @@
  * MA 02110-1301 USA
  */
 
+#include <soc/intel/baytrail/baytrail/iomap.h>
+
 Scope(\)
 {
 	// IO-Trap at 0x800. This is the ACPI->SMI communication interface.
@@ -29,6 +31,21 @@ Scope(\)
 		Offset(0x8),
 		TRP0, 8		// IO-Trap at 0x808
 	}
+
+	// Intel Legacy Block
+	OperationRegion(ILBS, SystemMemory, ILB_BASE_ADDRESS, ILB_BASE_SIZE)
+	Field (ILBS, AnyAcc, NoLock, Preserve)
+	{
+		Offset (0x8),
+		PRTA, 8,
+		PRTB, 8,
+		PRTC, 8,
+		PRTD, 8,
+		PRTE, 8,
+		PRTF, 8,
+		PRTG, 8,
+		PRTH, 8,
+	}
 }
 
 Name(_HID,EISAID("PNP0A08"))	// PCIe
@@ -210,3 +227,9 @@ Method (_OSC, 4)
 		Return (Arg3)
 	}
 }
+
+// LPC Bridge 0:1f.0
+#include "lpc.asl"
+
+// IRQ routing for each PCI device
+#include "irqroute.asl"
diff --git a/src/soc/intel/baytrail/baytrail/irq.h b/src/soc/intel/baytrail/baytrail/irq.h
new file mode 100644
index 0000000000..d037b89059
--- /dev/null
+++ b/src/soc/intel/baytrail/baytrail/irq.h
@@ -0,0 +1,89 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef _BAYTRAIL_IRQ_H_
+#define _BAYTRAIL_IRQ_H_
+
+#define PIRQA_APIC_IRQ			16
+#define PIRQB_APIC_IRQ			17
+#define PIRQC_APIC_IRQ			18
+#define PIRQD_APIC_IRQ			19
+#define PIRQE_APIC_IRQ			20
+#define PIRQF_APIC_IRQ			21
+#define PIRQG_APIC_IRQ			22
+#define PIRQH_APIC_IRQ			23
+
+#define PIRQ_PIC_IRQDISABLE		0x0
+#define PIRQ_PIC_IRQ3			0x3
+#define PIRQ_PIC_IRQ4			0x4
+#define PIRQ_PIC_IRQ5			0x5
+#define PIRQ_PIC_IRQ6			0x6
+#define PIRQ_PIC_IRQ7			0x7
+#define PIRQ_PIC_IRQ9			0x9
+#define PIRQ_PIC_IRQ10			0xa
+#define PIRQ_PIC_IRQ11			0xb
+#define PIRQ_PIC_IRQ12			0xc
+#define PIRQ_PIC_IRQ14			0xe
+#define PIRQ_PIC_IRQ15			0xf
+
+/* Overloaded term, but these values determine the per device route. */
+#define PIRQA				0
+#define PIRQB				1
+#define PIRQC				2
+#define PIRQD				3
+#define PIRQE				4
+#define PIRQF				5
+#define PIRQG				6
+#define PIRQH				7
+
+/* In each mainbaord directory there should exist a header file irqroute.h that
+ * defines the PCI_DEV_PIRQ_ROUTES and PIRQ_PIC_ROUTES macros which
+ * consist of PCI_DEV_PIRQ_ROUTE and PIRQ_PIC entries. */
+
+#if !defined(__ASSEMBLER__) && !defined(__ACPI__)
+#include <stdint.h>
+
+#define NUM_IR_DEVS 32
+#define NUM_PIRQS   8
+
+struct baytrail_irq_route {
+	/* Per device configuration. */
+	uint16_t pcidev[NUM_IR_DEVS];
+	/* Route path for each internal PIRQx in PIC mode. */
+	uint8_t  pic[NUM_PIRQS];
+};
+
+extern const struct baytrail_irq_route global_baytrail_irq_route;
+
+#define DEFINE_IRQ_ROUTES \
+	const struct baytrail_irq_route global_baytrail_irq_route = { \
+		.pcidev = { PCI_DEV_PIRQ_ROUTES, }, \
+		.pic = { PIRQ_PIC_ROUTES, }, \
+	}
+
+#define PCI_DEV_PIRQ_ROUTE(dev_, a_, b_, c_, d_) \
+	[dev_] = ((PIRQ ## d_) << 12) | ((PIRQ ## c_) << 8) | \
+	         ((PIRQ ## b_) <<  4) | ((PIRQ ## a_) << 0)
+
+#define PIRQ_PIC(pirq_, pic_irq_) \
+	[PIRQ ## pirq_] = PIRQ_PIC_IRQ ## pic_irq_
+
+#endif /* !defined(__ASSEMBLER__) && !defined(__ACPI__) */
+
+#endif /* _BAYTRAIL_IRQ_H_ */
diff --git a/src/soc/intel/baytrail/baytrail/pci_devs.h b/src/soc/intel/baytrail/baytrail/pci_devs.h
index 96e9547f5b..b3fdce234a 100644
--- a/src/soc/intel/baytrail/baytrail/pci_devs.h
+++ b/src/soc/intel/baytrail/baytrail/pci_devs.h
@@ -23,27 +23,27 @@
 /* All these devices live on bus 0 with the associated device and function */
 
 /* SoC transaction router */
-#define SOC_DEV 0
+#define SOC_DEV 0x0
 #define SOC_FUNC 0
 # define SOC_DEVID 0x0f00
 
 /* Graphics and Display */
-#define GFX_DEV 2
+#define GFX_DEV 0x2
 #define GFX_FUNC 0
 # define GFX_DEVID 0x0f31
 
 /* SDIO Port */
-#define SDIO_DEV 17
+#define SDIO_DEV 0x11
 #define SDIO_FUNC 0
 # define SDIO_DEVID 0x0f15
 
 /* SD Port */
-#define SD_DEV 18
+#define SD_DEV 0x12
 #define SD_FUNC 0
 # define SD_DEVID 0x0f16
 
 /* SATA */
-#define SATA_DEV 19
+#define SATA_DEV 0x13
 #define SATA_FUNC 0
 #define IDE1_DEVID  0x0f20
 #define IDE2_DEVID  0x0f21
@@ -51,22 +51,22 @@
 #define AHCI2_DEVID 0x0f23
 
 /* xHCI */
-#define XHCI_DEV 20
+#define XHCI_DEV 0x14
 #define XHCI_FUNC 0
 # define XHCI_DEVID 0x0f35
 
 /* LPE Audio */
-#define LPE_DEV 21
+#define LPE_DEV 0x15
 #define LPE_FUNC 0
 # define LPE_DEVID 0x0f28
 
 /* MMC Port */
-#define MMC_DEV 23
+#define MMC_DEV 0x17
 #define MMC_FUNC 0
 # define MMC_DEVID 0x0f50
 
 /* Serial IO 1 */
-#define SIO1_DEV 24
+#define SIO1_DEV 0x18
 # define SIO_DMA1_DEV SIO1_DEV
 # define SIO_DMA1_FUNC 0
 # define SIO_DMA1_DEVID 0x0f40
@@ -93,17 +93,17 @@
 # define I2C7_DEVID 0x0f47
 
 /* Trusted Execution Engine */
-#define TXE_DEV 26
+#define TXE_DEV 0x1a
 #define TXE_FUNC 0
 # define TXE_DEVID 0x0f18
 
 /* HD Audio */
-#define HDA_DEV 27
+#define HDA_DEV 0x1b
 #define HDA_FUNC 0
 # define HDA_DEVID 0x0f04
 
 /* PCIe Ports */
-#define PCIE_DEV 28
+#define PCIE_DEV 0x1c
 # define PCIE_PORT1_DEV PCIE_DEV
 # define PCIE_PORT1_FUNC 0
 # define PCIE_PORT1_DEVID 0x0f48
@@ -118,12 +118,12 @@
 # define PCIE_PORT4_DEVID 0x0f4e
 
 /* EHCI */
-#define EHCI_DEV 29
+#define EHCI_DEV 0x1d
 #define EHCI_FUNC 0
 # define EHCI_DEVID 0x0f34
 
 /* Serial IO 2 */
-#define SIO2_DEV 30
+#define SIO2_DEV 0x1e
 # define SIO_DMA2_DEV SIO2_DEV
 # define SIO_DMA2_FUNC 0
 # define SIO_DMA2_DEVID 0x0f06
@@ -144,7 +144,7 @@
 # define SPI_DEVID 0xf0e
 
 /* Platform Controller Unit */
-#define PCU_DEV 31
+#define PCU_DEV 0x1f
 # define LPC_DEV PCU_DEV
 # define LPC_FUNC 0
 # define LPC_DEVID 0x0f1c
diff --git a/src/soc/intel/baytrail/southcluster.c b/src/soc/intel/baytrail/southcluster.c
index f8b4f18472..10c0b896fb 100644
--- a/src/soc/intel/baytrail/southcluster.c
+++ b/src/soc/intel/baytrail/southcluster.c
@@ -27,6 +27,7 @@
 #include <romstage_handoff.h>
 
 #include <baytrail/iomap.h>
+#include <baytrail/irq.h>
 #include <baytrail/lpc.h>
 #include <baytrail/nvs.h>
 #include <baytrail/pci_devs.h>
@@ -116,6 +117,23 @@ static void sc_read_resources(device_t dev)
 	sc_add_io_resources(dev);
 }
 
+static void sc_init(device_t dev)
+{
+	int i;
+	const unsigned long pr_base = ILB_BASE_ADDRESS + 0x08;
+	const unsigned long ir_base = ILB_BASE_ADDRESS + 0x20;
+	const struct baytrail_irq_route *ir = &global_baytrail_irq_route;
+
+	/* Set up the PIRQ PIC routing based on static config. */
+	for (i = 0; i < NUM_PIRQS; i++) {
+		write8(pr_base + i*sizeof(ir->pic[i]), ir->pic[i]);
+	}
+	/* Set up the per device PIRQ routing base on static config. */
+	for (i = 0; i < NUM_IR_DEVS; i++) {
+		write16(ir_base + i*sizeof(ir->pcidev[i]), ir->pcidev[i]);
+	}
+}
+
 /*
  * Common code for the south cluster devices.
  */
@@ -412,7 +430,7 @@ static struct device_operations device_ops = {
 	.read_resources		= sc_read_resources,
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= NULL,
-	.init			= NULL,
+	.init			= sc_init,
 	.enable			= southcluster_enable_dev,
 	.scan_bus		= scan_static_bus,
 	.ops_pci		= &soc_pci_ops,