vendorcode/amd/opensil/genoa_poc: add opensil_fill_fadt_io_ports

Add the opensil_fill_fadt_io_ports function to fill in the ACPI I/O
ports in FADT that openSIL configured.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I154a162cc8e048cadab693c0755e96c71a62983c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76529
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/vendorcode/amd/opensil/genoa_poc/Makefile.inc

@@ -8,6 +8,7 @@ CPPFLAGS_romstage += -I$(opensil_dir)/Include -I$(opensil_dir)/xUSL -I$(opensil_
 romstage-y += opensil_console.c
 romstage-y += romstage.c
 
+ramstage-y += acpi.c
 ramstage-y += memmap.c
 ramstage-y += opensil_console.c
 ramstage-y += ramstage.c

src/vendorcode/amd/opensil/genoa_poc/acpi.c

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi.h>
+#include <Sil-api.h>
+#include <SilCommon.h>
+#include <xSIM-api.h>
+#include <FCH/Common/FchCommonCfg.h>
+#include "opensil.h"
+
+void opensil_fill_fadt_io_ports(acpi_fadt_t *fadt)
+{
+	FCHHWACPI_INPUT_BLK *blk = SilFindStructure(SilId_FchHwAcpiP,  0);
+
+	fadt->pm1a_evt_blk = blk->AcpiPm1EvtBlkAddr;
+	fadt->pm1a_cnt_blk = blk->AcpiPm1CntBlkAddr;
+	fadt->pm_tmr_blk = blk->AcpiPmTmrBlkAddr;
+	fadt->gpe0_blk = blk->AcpiGpe0BlkAddr;
+}

src/vendorcode/amd/opensil/genoa_poc/opensil.h

@@ -9,6 +9,6 @@ void SIL_STATUS_report(const char *function, const int status);
 // Add the memory map to dev, starting at index idx, returns last use idx
 int add_opensil_memmap(struct device *dev, int idx);
 // Fill in FADT from opensil
-void opensil_fill_fadt(acpi_fadt_t *fadt);
+void opensil_fill_fadt_io_ports(acpi_fadt_t *fadt);
 
 #endif