xref: /aosp_15_r20/external/coreboot/src/soc/amd/common/fsp/fsp-acpi.c (revision b9411a12aaaa7e1e6a6fb7c5e057f44ee179a49c)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #include <acpi/acpi.h>
4 #include <amdblocks/acpi.h>
5 #include <console/console.h>
6 #include <fsp/util.h>
7 #include <FspGuids.h>
8 #include <string.h>
9 #include <types.h>
10 
11 struct amd_fsp_acpi_hob_info {
12 	uint32_t table_size_in_bytes;
13 	uint8_t total_hobs_for_table;
14 	uint8_t sequence_number;
15 	uint16_t reserved;
16 	uint16_t hob_payload[0xffc8]; /* maximum payload size */
17 } __packed;
18 
add_agesa_fsp_acpi_table(guid_t guid,const char * name,acpi_rsdp_t * rsdp,unsigned long current)19 static unsigned long add_agesa_fsp_acpi_table(guid_t guid, const char *name, acpi_rsdp_t *rsdp,
20 					      unsigned long current)
21 {
22 	const struct amd_fsp_acpi_hob_info *data;
23 	void *table = (void *)current;
24 	size_t hob_size;
25 
26 	data = fsp_find_extension_hob_by_guid(guid.b, &hob_size);
27 	if (data == NULL) {
28 		printk(BIOS_ERR, "AGESA %s ACPI table was not found.\n", name);
29 		return current;
30 	}
31 
32 	if (data->table_size_in_bytes > sizeof(data->hob_payload)) {
33 		printk(BIOS_ERR, "AGESA %s ACPI table size larger than maximum HOB payload "
34 		       "size.\n", name);
35 		return current;
36 	}
37 
38 	printk(BIOS_INFO, "ACPI:    * %s (AGESA).\n", name);
39 
40 	memcpy(table, data->hob_payload, data->table_size_in_bytes);
41 
42 	current += data->table_size_in_bytes;
43 	acpi_add_table(rsdp, table);
44 	current = acpi_align_current(current);
45 
46 	return current;
47 }
48 
acpi_add_fsp_tables(unsigned long current,acpi_rsdp_t * rsdp)49 unsigned long acpi_add_fsp_tables(unsigned long current, acpi_rsdp_t *rsdp)
50 {
51 	/* add ALIB SSDT from HOB */
52 	current = acpi_align_current(current);
53 	current = add_agesa_fsp_acpi_table(AMD_FSP_ACPI_ALIB_HOB_GUID, "ALIB", rsdp, current);
54 
55 	return current;
56 }
57