soc/amd: commonize PCI root IOAPIC initialization

Make the initialization of the IOAPIC(s) in the PCI root(s) common
across all AMD family 17h+ SoCs. For this the more general
implementation from the Genoa code that supports multiple PC roots is
moved to the common AMD code. All other family 17h+ SoCs are then
adapted to use the common code. For those non-Genoa SoCs, the
initialization of this second IOAPIC is moved from the northbridge
device to the domain device above to match Genoa.

Test=Both the FCH IOAPIC and the PCIe root IOAPIC are still initialized
on Mandolin

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I7c0ec6ac2f11cb11e46248cceec96c1fd2a49c16
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80286
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 25 insertions, 1 deletions

diff --git a/src/soc/amd/common/block/include/amdblocks/root_complex.h b/src/soc/amd/common/block/include/amdblocks/root_complex.h
index cac659e756..767221ec06 100644
--- a/src/soc/amd/common/block/include/amdblocks/root_complex.h
+++ b/src/soc/amd/common/block/include/amdblocks/root_complex.h
@@ -31,4 +31,6 @@ signed int get_iohc_fabric_id(struct device *domain);
 
 void read_fsp_resources(struct device *dev, unsigned long *idx);
 
+void amd_pci_domain_init(struct device *domain);
+
 #endif /* AMD_BLOCK_ROOT_COMPLEX_H */
diff --git a/src/soc/amd/common/block/root_complex/Makefile.mk b/src/soc/amd/common/block/root_complex/Makefile.mk
index ba550bda6b..07f3ab108e 100644
--- a/src/soc/amd/common/block/root_complex/Makefile.mk
+++ b/src/soc/amd/common/block/root_complex/Makefile.mk
@@ -1,2 +1,7 @@
 ## SPDX-License-Identifier: GPL-2.0-only
-ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_ROOT_COMPLEX) += non_pci_resources.c
+ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_ROOT_COMPLEX),y)
+
+ramstage-y += ioapic.c
+ramstage-y += non_pci_resources.c
+
+endif # CONFIG_SOC_AMD_COMMON_BLOCK_ROOT_COMPLEX
diff --git a/src/soc/amd/common/block/root_complex/ioapic.c b/src/soc/amd/common/block/root_complex/ioapic.c
new file mode 100644
index 0000000000..cdeb53239b
--- /dev/null
+++ b/src/soc/amd/common/block/root_complex/ioapic.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/ioapic.h>
+#include <amdblocks/root_complex.h>
+#include <arch/ioapic.h>
+#include <device/device.h>
+#include <device/resource.h>
+#include <types.h>
+
+void amd_pci_domain_init(struct device *domain)
+{
+	struct resource *res = probe_resource(domain, IOMMU_IOAPIC_IDX);
+	if (!res)
+		return;
+
+	register_new_ioapic((void *)(uintptr_t)res->base);
+}