soc/amd/genoa: add root complex support code

This functionality will eventually be used by the common data fabric
domain resource reporting code.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ieedd432c144e53e43d8099ec617a15056bb36fd1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78307
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 63 insertions, 0 deletions

diff --git a/src/soc/amd/genoa/Makefile.inc b/src/soc/amd/genoa/Makefile.inc
index ef8f349e8c..2877feaccc 100644
--- a/src/soc/amd/genoa/Makefile.inc
+++ b/src/soc/amd/genoa/Makefile.inc
@@ -14,6 +14,7 @@ romstage-y	+= romstage.c
 
 ramstage-y	+= aoac.c
 ramstage-y	+= chip.c
+ramstage-y	+= root_complex.c
 
 CPPFLAGS_common += -I$(src)/soc/amd/genoa/include
 
diff --git a/src/soc/amd/genoa/root_complex.c b/src/soc/amd/genoa/root_complex.c
new file mode 100644
index 0000000000..7dd1f821bc
--- /dev/null
+++ b/src/soc/amd/genoa/root_complex.c
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/data_fabric.h>
+#include <amdblocks/root_complex.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <types.h>
+
+uint32_t get_iohc_misc_smn_base(struct device *domain)
+{
+	switch (domain->path.domain.domain) {
+	case 0:
+		return SMN_IOHC_MISC_BASE_13C1;
+	case 1:
+		return SMN_IOHC_MISC_BASE_13B1;
+	case 2:
+		return SMN_IOHC_MISC_BASE_13E1;
+	case 3:
+		return SMN_IOHC_MISC_BASE_13D1;
+	default:
+		printk(BIOS_ERR, "Invalid domain 0x%x with no corresponding IOHC device.\n",
+		       domain->path.domain.domain);
+		return 0;
+	}
+}
+
+static const struct non_pci_mmio_reg non_pci_mmio[] = {
+	{ 0x2d8, 0xfffffff00000ull,   1 * MiB, NON_PCI_RES_IDX_AUTO },
+	{ 0x2e0, 0xfffffff00000ull,   1 * MiB, NON_PCI_RES_IDX_AUTO },
+	{ 0x2e8, 0xfffffff00000ull,   1 * MiB, NON_PCI_RES_IDX_AUTO },
+	/* The hardware has a 256 byte alignment requirement for the IOAPIC MMIO base, but we
+	   tell the FSP to configure a 4k-aligned base address and this is reported as 4 KiB
+	   resource. */
+	{ 0x2f0, 0xffffffffff00ull,   4 * KiB, IOMMU_IOAPIC_IDX },
+	{ 0x2f8, 0xfffffff00000ull,   1 * MiB, NON_PCI_RES_IDX_AUTO },
+	{ 0x300, 0xfffffff00000ull,   1 * MiB, NON_PCI_RES_IDX_AUTO },
+	{ 0x308, 0xfffffffff000ull,   4 * KiB, NON_PCI_RES_IDX_AUTO },
+	{ 0x310, 0xfffffff00000ull,   1 * MiB, NON_PCI_RES_IDX_AUTO },
+	{ 0x318, 0xfffffff80000ull, 512 * KiB, NON_PCI_RES_IDX_AUTO },
+};
+
+const struct non_pci_mmio_reg *get_iohc_non_pci_mmio_regs(size_t *count)
+{
+	*count = ARRAY_SIZE(non_pci_mmio);
+	return non_pci_mmio;
+}
+
+signed int get_iohc_fabric_id(struct device *domain)
+{
+	switch (domain->path.domain.domain) {
+	case 0:
+		return 0x22;
+	case 1:
+		return 0x23;
+	case 2:
+		return 0x21;
+	case 3:
+		return 0x20;
+	default:
+		return -1;
+	}
+}