xref: /aosp_15_r20/external/coreboot/src/soc/mediatek/common/early_init.c (revision b9411a12aaaa7e1e6a6fb7c5e057f44ee179a49c) 
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #include <assert.h>
4 #include <soc/early_init.h>
5 #include <string.h>
6 
find_early_init(void)7 static struct early_init_data *find_early_init(void)
8 {
9 	assert(sizeof(struct early_init_data) <= REGION_SIZE(early_init_data));
10 	return (struct early_init_data *)_early_init_data;
11 }
12 
early_init_clear(void)13 void early_init_clear(void)
14 {
15 	struct early_init_data *data = find_early_init();
16 
17 	if (!data)
18 		return;
19 
20 	memset(data, 0, sizeof(*data));
21 }
22 
early_init_save_time(enum early_init_type init_type)23 void early_init_save_time(enum early_init_type init_type)
24 {
25 	struct early_init_data *data = find_early_init();
26 
27 	if (!data)
28 		return;
29 
30 	timer_monotonic_get(&data->init_time[init_type]);
31 }
32 
early_init_get_elapsed_time_us(enum early_init_type init_type)33 long early_init_get_elapsed_time_us(enum early_init_type init_type)
34 {
35 	struct early_init_data *data = find_early_init();
36 	struct mono_time cur_time = {0};
37 
38 	if (!data)
39 		return 0;
40 
41 	/* If early init data was never saved */
42 	if (!memcmp(&data->init_time[init_type], &cur_time, sizeof(cur_time)))
43 		return 0;
44 
45 	timer_monotonic_get(&cur_time);
46 
47 	return mono_time_diff_microseconds(&data->init_time[init_type],
48 					   &cur_time);
49 }
50