sandy/ivy/nehalem: Remerge interrupt handling

On those chipsets the pins are just a legacy concept. Real interrupts are
messages on corresponding busses or some internal logic of chipset.
Hence interrupt routing isn't anymore board-specific (dependent on layout) but
depends only on configuration.
Rather than attempting to sync real config, ACPI and legacy descriptors, just
use the same interrupt routing per chipset covering all possible devices.

The only part which remains board-specific are LPC and PCI interrupts.

Interrupt balancing may suffer from such merge but:
a) Doesn't seem to be the case of this map on current systems
b) Almost all OS use MSI nowadays bypassing this stuff completely
c) If we want a good balancing we need to take into account that e.g.
   wlan card may be placed in a different slot and so would require complicated
   balancing on runtime. It's difficult to maintain with almost no benefit.

Change-Id: I9f63d1d338c5587ebac7a52093e5b924f6e5ca2d
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7130
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

4 files changed, 1 insertions, 141 deletions

diff --git a/src/mainboard/google/stout/acpi/sandybridge_pci_irqs.asl b/src/mainboard/google/stout/acpi/sandybridge_pci_irqs.asl
deleted file mode 100644
index cf3d82a181..0000000000
--- a/src/mainboard/google/stout/acpi/sandybridge_pci_irqs.asl
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * 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
- */
-
-/* This is board specific information: IRQ routing for Sandybridge */
-
-// PCI Interrupt Routing
-Method(_PRT)
-{
-	If (PICM) {
-		Return (Package() {
-			// Onboard graphics (IGD)	0:2.0
-			Package() { 0x0002ffff, 0, 0, 16 },
-			// XHCI	0:14.0
-			Package() { 0x0014ffff, 0, 0, 19 },
-			// High Definition Audio	0:1b.0
-			Package() { 0x001bffff, 0, 0, 16 },
-			// PCIe Root Ports		0:1c.x
-			Package() { 0x001cffff, 0, 0, 19 },
-			Package() { 0x001cffff, 1, 0, 20 },
-			Package() { 0x001cffff, 2, 0, 17 },
-			Package() { 0x001cffff, 3, 0, 18 },
-			// EHCI	#1			0:1d.0
-			Package() { 0x001dffff, 0, 0, 19 },
-			// EHCI	#2			0:1a.0
-			Package() { 0x001affff, 0, 0, 21 },
-			// LPC devices			0:1f.0
-			Package() { 0x001fffff, 0, 0, 17 },
-			Package() { 0x001fffff, 1, 0, 23 },
-			Package() { 0x001fffff, 2, 0, 16 },
-			Package() { 0x001fffff, 3, 0, 18 },
-		})
-	} Else {
-		Return (Package() {
-			// Onboard graphics (IGD)	0:2.0
-			Package() { 0x0002ffff, 0, \_SB.PCI0.LPCB.LNKA, 0 },
-			// XHCI   0:14.0
-			Package() { 0x0014ffff, 0, \_SB.PCI0.LPCB.LNKD, 0 },
-			// High Definition Audio	0:1b.0
-			Package() { 0x001bffff, 0, \_SB.PCI0.LPCB.LNKA, 0 },
-			// PCIe Root Ports		0:1c.x
-			Package() { 0x001cffff, 0, \_SB.PCI0.LPCB.LNKD, 0 },
-			Package() { 0x001cffff, 1, \_SB.PCI0.LPCB.LNKE, 0 },
-			Package() { 0x001cffff, 2, \_SB.PCI0.LPCB.LNKB, 0 },
-			Package() { 0x001cffff, 3, \_SB.PCI0.LPCB.LNKC, 0 },
-			// EHCI	#1			0:1d.0
-			Package() { 0x001dffff, 0, \_SB.PCI0.LPCB.LNKD, 0 },
-			// EHCI	#2			0:1a.0
-			Package() { 0x001affff, 0, \_SB.PCI0.LPCB.LNKF, 0 },
-			// LPC device			0:1f.0
-			Package() { 0x001fffff, 0, \_SB.PCI0.LPCB.LNKB, 0 },
-			Package() { 0x001fffff, 1, \_SB.PCI0.LPCB.LNKH, 0 },
-			Package() { 0x001fffff, 2, \_SB.PCI0.LPCB.LNKA, 0 },
-			Package() { 0x001fffff, 3, \_SB.PCI0.LPCB.LNKC, 0 },
-		})
-	}
-}
diff --git a/src/mainboard/google/stout/acpi_tables.c b/src/mainboard/google/stout/acpi_tables.c
index 504ae64e3e..23c47f96f5 100644
--- a/src/mainboard/google/stout/acpi_tables.c
+++ b/src/mainboard/google/stout/acpi_tables.c
@@ -80,24 +80,6 @@ void acpi_create_gnvs(global_nvs_t *gnvs)
 	gnvs->xhci = XHCI_MODE;
 }
 
-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;
-}
-
 unsigned long acpi_fill_slit(unsigned long current)
 {
 	// Not implemented
diff --git a/src/mainboard/google/stout/devicetree.cb b/src/mainboard/google/stout/devicetree.cb
index 97e2c09a0f..4ac89f629f 100644
--- a/src/mainboard/google/stout/devicetree.cb
+++ b/src/mainboard/google/stout/devicetree.cb
@@ -40,15 +40,6 @@ chip northbridge/intel/sandybridge
 		device pci 02.0 on end # vga controller
 
 		chip southbridge/intel/bd82x6x # Intel Series 6 Cougar Point PCH
-			register "pirqa_routing" = "0x8b"
-			register "pirqb_routing" = "0x8a"
-			register "pirqc_routing" = "0x8b"
-			register "pirqd_routing" = "0x8b"
-			register "pirqe_routing" = "0x80"
-			register "pirqf_routing" = "0x80"
-			register "pirqg_routing" = "0x80"
-			register "pirqh_routing" = "0x80"
-
 			# GPI routing
 			#  0 No effect (default)
 			#  1 SMI# (if corresponding ALT_GPI_SMI_EN bit is also set)
diff --git a/src/mainboard/google/stout/romstage.c b/src/mainboard/google/stout/romstage.c
index 728d74d842..6290e03165 100644
--- a/src/mainboard/google/stout/romstage.c
+++ b/src/mainboard/google/stout/romstage.c
@@ -68,48 +68,7 @@ static void rcba_config(void)
 {
 	u32 reg32;
 
-	/*
-	 *             GFX         INTA -> PIRQA (MSI)
-	 * D20IP_XHCI  XHCI        INTA -> PIRQD (MSI)
-	 * D26IP_E2P   EHCI #2     INTA -> PIRQF
-	 * D27IP_ZIP   HDA         INTA -> PIRQA (MSI)
-	 * D28IP_P2IP  WLAN        INTA -> PIRQD
-	 * D28IP_P3IP  Card Reader INTB -> PIRQE
-	 * D28IP_P6IP  LAN         INTC -> PIRQB
-	 * D29IP_E1P   EHCI #1     INTA -> PIRQD
-	 * D31IP_SIP   SATA        INTA -> PIRQB (MSI)
-	 * D31IP_SMIP  SMBUS       INTB -> PIRQH
-	 */
-
-	/* Device interrupt pin register (board specific) */
-	RCBA32(D31IP) = (NOINT << D31IP_TTIP) | (NOINT << D31IP_SIP2) |
-		(INTB << D31IP_SMIP) | (INTA << D31IP_SIP);
-	RCBA32(D30IP) = (NOINT << D30IP_PIP);
-	RCBA32(D29IP) = (INTA << D29IP_E1P);
-	RCBA32(D28IP) = (NOINT << D28IP_P1IP) | (INTA << D28IP_P2IP) |
-		(INTB << D28IP_P3IP) | (NOINT << D28IP_P4IP) |
-		(NOINT << D28IP_P5IP) | (INTC << D28IP_P6IP) |
-		(NOINT << D28IP_P7IP) | (NOINT << D28IP_P8IP);
-	RCBA32(D27IP) = (INTA << D27IP_ZIP);
-	RCBA32(D26IP) = (INTA << D26IP_E2P);
-	RCBA32(D25IP) = (NOINT << D25IP_LIP);
-	RCBA32(D22IP) = (NOINT << D22IP_MEI1IP);
-	RCBA32(D20IP) = (INTA << D20IP_XHCIIP);
-
-	/* Device interrupt route registers */
-	DIR_ROUTE(D31IR, PIRQB, PIRQH, PIRQA, PIRQC);
-	DIR_ROUTE(D29IR, PIRQD, PIRQE, PIRQF, PIRQG);
-	DIR_ROUTE(D28IR, PIRQD, PIRQE, PIRQB, PIRQC);
-	DIR_ROUTE(D27IR, PIRQA, PIRQB, PIRQC, PIRQD);
-	DIR_ROUTE(D26IR, PIRQF, PIRQB, PIRQC, PIRQD);
-	DIR_ROUTE(D25IR, PIRQA, PIRQB, PIRQC, PIRQD);
-	DIR_ROUTE(D22IR, PIRQA, PIRQB, PIRQC, PIRQD);
-	DIR_ROUTE(D20IR, PIRQD, PIRQE, PIRQF, PIRQG);
-
-	/* Enable IOAPIC (generic) */
-	RCBA16(OIC) = 0x0100;
-	/* PCH BWG says to read back the IOAPIC enable register */
-	(void) RCBA16(OIC);
+	southbridge_configure_default_intmap();
 
 	/* Disable unused devices (board specific) */
 	reg32 = RCBA32(FD);