3 files changed, 72 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/Makefile.inc b/src/soc/amd/picasso/Makefile.inc
index 4790ecb502..c7b6fb8bc9 100644
--- a/src/soc/amd/picasso/Makefile.inc
+++ b/src/soc/amd/picasso/Makefile.inc
@@ -58,6 +58,7 @@ ramstage-y += tsc_freq.c
 ramstage-y += finalize.c
 ramstage-y += soc_util.c
 ramstage-y += psp.c
+ramstage-y += fsp_params.c
 
 all-y += reset.c
 
diff --git a/src/soc/amd/picasso/fsp_params.c b/src/soc/amd/picasso/fsp_params.c
new file mode 100644
index 0000000000..0dbda093f3
--- /dev/null
+++ b/src/soc/amd/picasso/fsp_params.c
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#include <device/pci.h>
+#include <soc/pci_devs.h>
+#include <soc/platform_descriptors.h>
+#include <fsp/api.h>
+#include "chip.h"
+
+static void fill_pcie_descriptors(FSP_S_CONFIG *scfg,
+			const picasso_fsp_pcie_descriptor *descs, size_t num)
+{
+	size_t i;
+	picasso_fsp_pcie_descriptor *fsp_pcie;
+
+	/* FIXME: this violates C rules. */
+	fsp_pcie = (picasso_fsp_pcie_descriptor *)(scfg->dxio_descriptor0);
+
+	for (i = 0; i < num; i++) {
+		fsp_pcie[i] = descs[i];
+	}
+}
+
+static void fill_ddi_descriptors(FSP_S_CONFIG *scfg,
+			const picasso_fsp_ddi_descriptor *descs, size_t num)
+{
+	size_t i;
+	picasso_fsp_ddi_descriptor *fsp_ddi;
+
+	/* FIXME: this violates C rules. */
+	fsp_ddi = (picasso_fsp_ddi_descriptor *)&(scfg->ddi_descriptor0);
+
+	for (i = 0; i < num; i++) {
+		fsp_ddi[i] = descs[i];
+	}
+}
+static void fsp_fill_pcie_ddi_descriptors(FSP_S_CONFIG *scfg)
+{
+	const picasso_fsp_pcie_descriptor *fsp_pcie;
+	const picasso_fsp_ddi_descriptor *fsp_ddi;
+	size_t num_pcie;
+	size_t num_ddi;
+
+	mainboard_get_pcie_ddi_descriptors(&fsp_pcie, &num_pcie,
+						&fsp_ddi, &num_ddi);
+	fill_pcie_descriptors(scfg, fsp_pcie, num_pcie);
+	fill_ddi_descriptors(scfg, fsp_ddi, num_ddi);
+}
+
+void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
+{
+	FSP_S_CONFIG *scfg = &supd->FspsConfig;
+
+	fsp_fill_pcie_ddi_descriptors(scfg);
+}
diff --git a/src/soc/amd/picasso/include/soc/platform_descriptors.h b/src/soc/amd/picasso/include/soc/platform_descriptors.h
new file mode 100644
index 0000000000..bc67550fd0
--- /dev/null
+++ b/src/soc/amd/picasso/include/soc/platform_descriptors.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef __PICASSO_PLATFORM_DESCRIPTORS_H__
+#define __PICASSO_PLATFORM_DESCRIPTORS_H__
+
+#include <types.h>
+#include <platform_descriptors.h>
+#include <FspsUpd.h>
+
+/* Mainboard callback to obtain PCIe and DDI descriptors. */
+void mainboard_get_pcie_ddi_descriptors(
+		const picasso_fsp_pcie_descriptor **pcie_descs, size_t *pcie_num,
+		const picasso_fsp_ddi_descriptor **ddi_descs, size_t *ddi_num);
+
+#endif /* __PICASSO_PLATFORM_DESCRIPTORS_H__ */