sb/intel/i82801{g,j}x: Automatically generate ACPI PIRQ tables

Both southbridges need to be done at once since this southbridge code
is used for different northbridges, which fails to compile when done
separately.

This needs an acpi_name functions in the northbridge code to be
defined.

TESTED on Intel DG43GT: show correct PIRQ ACPI entries in
/sys/firmware/acpi/tables/SSDT.

Change-Id: I286d251ddf8fcae27dd07011a1cd62d8f4847683
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/22981
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

2 files changed, 17 insertions, 4 deletions

diff --git a/src/northbridge/intel/i945/acpi/hostbridge.asl b/src/northbridge/intel/i945/acpi/hostbridge.asl
index 5877b0e922..7b3917da97 100644
--- a/src/northbridge/intel/i945/acpi/hostbridge.asl
+++ b/src/northbridge/intel/i945/acpi/hostbridge.asl
@@ -228,6 +228,3 @@ Method (_CRS, 0, Serialized)
 
 	Return (MCRS)
 }
-
-/* IRQ assignment is mainboard specific. Get it from mainboard ACPI code */
-#include "acpi/i945_pci_irqs.asl"
diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c
index b8a225562b..d3539b86e6 100644
--- a/src/northbridge/intel/i945/northbridge.c
+++ b/src/northbridge/intel/i945/northbridge.c
@@ -117,6 +117,22 @@ static void pci_domain_set_resources(struct device *dev)
 	assign_resources(dev->link_list);
 }
 
+static const char *northbridge_acpi_name(const struct device *dev)
+{
+	if (dev->path.type == DEVICE_PATH_DOMAIN)
+		return "PCI0";
+
+	if (dev->path.type != DEVICE_PATH_PCI || dev->bus->secondary != 0)
+		return NULL;
+
+	switch (dev->path.pci.devfn) {
+	case PCI_DEVFN(0, 0):
+		return "MCHC";
+	}
+
+	return NULL;
+}
+
 	/* TODO We could determine how many PCIe busses we need in
 	 * the bar. For now that number is hardcoded to a max of 64.
 	 * See e7525/northbridge.c for an example.
@@ -127,6 +143,7 @@ static struct device_operations pci_domain_ops = {
 	.enable_resources = NULL,
 	.init             = NULL,
 	.scan_bus         = pci_domain_scan_bus,
+	.acpi_name        = northbridge_acpi_name,
 };
 
 static void mc_read_resources(struct device *dev)
@@ -154,7 +171,6 @@ static void intel_set_subsystem(struct device *dev, unsigned int vendor,
 				((device & 0xffff) << 16) | (vendor & 0xffff));
 	}
 }
-
 static struct pci_operations intel_pci_ops = {
 	.set_subsystem    = intel_set_subsystem,
 };