1 /*
2 * Copyright (c) 2020, Arm Limited. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <common/debug.h>
8 #include <common/fdt_wrappers.h>
9
10 #include <libfdt.h>
11 #include <fconf_nt_config_getter.h>
12
13 #include <plat/common/platform.h>
14
15 struct event_log_config_t event_log_config;
16
fconf_populate_event_log_config(uintptr_t config)17 int fconf_populate_event_log_config(uintptr_t config)
18 {
19 int err;
20 int node;
21
22 /* Necessary to work with libfdt APIs */
23 const void *dtb = (const void *)config;
24
25 /*
26 * Find the offset of the node containing "arm,tpm_event_log"
27 * compatible property
28 */
29 const char *compatible_str = "arm,tpm_event_log";
30
31 node = fdt_node_offset_by_compatible(dtb, -1, compatible_str);
32 if (node < 0) {
33 ERROR("FCONF: Can't find '%s' compatible in dtb\n",
34 compatible_str);
35 return node;
36 }
37
38 /* Retrieve Event Log details from the DTB */
39 #ifdef SPD_opteed
40 err = fdtw_read_cells(dtb, node, "tpm_event_log_sm_addr", 2,
41 &event_log_config.tpm_event_log_sm_addr);
42 if (err < 0) {
43 ERROR("FCONF: Read cell failed for 'tpm_event_log_sm_addr'\n");
44 return err;
45 }
46 #endif
47 err = fdtw_read_cells(dtb, node,
48 "tpm_event_log_addr", 2, &event_log_config.tpm_event_log_addr);
49 if (err < 0) {
50 ERROR("FCONF: Read cell failed for 'tpm_event_log_addr'\n");
51 return err;
52 }
53
54 err = fdtw_read_cells(dtb, node,
55 "tpm_event_log_size", 1, &event_log_config.tpm_event_log_size);
56 if (err < 0) {
57 ERROR("FCONF: Read cell failed for 'tpm_event_log_size'\n");
58 }
59
60 return err;
61 }
62
63 FCONF_REGISTER_POPULATOR(NT_CONFIG, event_log_config,
64 fconf_populate_event_log_config);
65