soc/amd/common/fsp/fsp-acpi: factor out SSDT from HOB functionality

This function will be reused in Cezanne, so move it from the Picasso
directory to the common FSP integration code.

TEST=On Mandolin Linux finds the AMD SSDT that contains ALIB.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I7b256de712fe60d1c021cb875aaadec1d331584b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52896
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/soc/amd/common/fsp/fsp-acpi.c b/src/soc/amd/common/fsp/fsp-acpi.c
new file mode 100644
index 0000000000..b530688c03
--- /dev/null
+++ b/src/soc/amd/common/fsp/fsp-acpi.c
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi.h>
+#include <amdblocks/acpi.h>
+#include <console/console.h>
+#include <fsp/util.h>
+#include <string.h>
+#include <types.h>
+
+struct amd_fsp_acpi_hob_info {
+	uint32_t table_size_in_bytes;
+	uint8_t total_hobs_for_table;
+	uint8_t sequence_number;
+	uint16_t reserved;
+	uint16_t hob_payload[0xffc8]; /* maximum payload size */
+} __packed;
+
+uintptr_t add_agesa_fsp_acpi_table(guid_t guid, const char *name, acpi_rsdp_t *rsdp,
+				   uintptr_t current)
+{
+	const struct amd_fsp_acpi_hob_info *data;
+	void *table = (void *)current;
+	size_t hob_size;
+
+	data = fsp_find_extension_hob_by_guid(guid.b, &hob_size);
+	if (!data) {
+		printk(BIOS_ERR, "AGESA %s ACPI table was not found.\n", name);
+		return current;
+	}
+
+	printk(BIOS_INFO, "ACPI:    * %s (AGESA).\n", name);
+
+	memcpy(table, data->hob_payload, data->table_size_in_bytes);
+
+	current += data->table_size_in_bytes;
+	acpi_add_table(rsdp, table);
+	current = acpi_align_current(current);
+
+	return current;
+}