1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2021 Renesas Electronics Corporation
4 *
5 */
6 #include <common.h>
7 #include <linux/libfdt.h>
8
9 /* If the firmware passed a device tree, use it for soc identification. */
10 extern u64 rcar_atf_boot_args[];
11
12 /* CPU information table */
13 static const struct {
14 char *soc_name;
15 u8 cpu_name[10];
16 } tfa_info[] = {
17 { "renesas,r8a774a1", "R8A774A1" },
18 { "renesas,r8a774b1", "R8A774B1" },
19 { "renesas,r8a774c0", "R8A774C0" },
20 { "renesas,r8a774e1", "R8A774E1" }
21 };
22
rzg_get_cpu_name(void)23 const u8 *rzg_get_cpu_name(void)
24 {
25 void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
26 bool ret = false;
27 int i;
28
29 if (fdt_magic(atf_fdt_blob) != FDT_MAGIC)
30 return NULL;
31
32 for (i = 0; i < ARRAY_SIZE(tfa_info); i++) {
33 if (fdt_node_check_compatible(atf_fdt_blob, 0,
34 tfa_info[i].soc_name) == 0) {
35 ret = true;
36 break;
37 }
38 }
39
40 return ret ? tfa_info[i].cpu_name : NULL;
41 }
42