1 /*
2 * This file is part of the coreboot project.
3 *
4 * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <asm/arch/timestamp.h>
11 #include <asm/arch/sysinfo.h>
12 #include <linux/compiler.h>
13
14 struct timestamp_entry {
15 uint32_t entry_id;
16 uint64_t entry_stamp;
17 } __packed;
18
19 struct timestamp_table {
20 uint64_t base_time;
21 uint32_t max_entries;
22 uint32_t num_entries;
23 struct timestamp_entry entries[0]; /* Variable number of entries */
24 } __packed;
25
26 static struct timestamp_table *ts_table __attribute__((section(".data")));
27
timestamp_init(void)28 void timestamp_init(void)
29 {
30 #ifdef CONFIG_SYS_X86_TSC_TIMER
31 uint64_t base_time;
32 #endif
33
34 ts_table = lib_sysinfo.tstamp_table;
35 #ifdef CONFIG_SYS_X86_TSC_TIMER
36 /*
37 * If coreboot is built with CONFIG_COLLECT_TIMESTAMPS, use the value
38 * of base_time in coreboot's timestamp table as our timer base,
39 * otherwise TSC counter value will be used.
40 *
41 * Sometimes even coreboot is built with CONFIG_COLLECT_TIMESTAMPS,
42 * the value of base_time in the timestamp table is still zero, so
43 * we must exclude this case too (this is currently seen on booting
44 * coreboot in qemu)
45 */
46 if (ts_table && ts_table->base_time)
47 base_time = ts_table->base_time;
48 else
49 base_time = rdtsc();
50 timer_set_base(base_time);
51 #endif
52 timestamp_add_now(TS_U_BOOT_INITTED);
53 }
54
timestamp_add(enum timestamp_id id,uint64_t ts_time)55 void timestamp_add(enum timestamp_id id, uint64_t ts_time)
56 {
57 struct timestamp_entry *tse;
58
59 if (!ts_table || (ts_table->num_entries == ts_table->max_entries))
60 return;
61
62 tse = &ts_table->entries[ts_table->num_entries++];
63 tse->entry_id = id;
64 tse->entry_stamp = ts_time - ts_table->base_time;
65 }
66
timestamp_add_now(enum timestamp_id id)67 void timestamp_add_now(enum timestamp_id id)
68 {
69 timestamp_add(id, rdtsc());
70 }
71
timestamp_add_to_bootstage(void)72 int timestamp_add_to_bootstage(void)
73 {
74 uint i;
75
76 if (!ts_table)
77 return -1;
78
79 for (i = 0; i < ts_table->num_entries; i++) {
80 struct timestamp_entry *tse = &ts_table->entries[i];
81 const char *name = NULL;
82
83 switch (tse->entry_id) {
84 case TS_START_ROMSTAGE:
85 name = "start-romstage";
86 break;
87 case TS_BEFORE_INITRAM:
88 name = "before-initram";
89 break;
90 case TS_DEVICE_INITIALIZE:
91 name = "device-initialize";
92 break;
93 case TS_DEVICE_DONE:
94 name = "device-done";
95 break;
96 case TS_SELFBOOT_JUMP:
97 name = "selfboot-jump";
98 break;
99 }
100 if (name) {
101 bootstage_add_record(0, name, BOOTSTAGEF_ALLOC,
102 tse->entry_stamp /
103 get_tbclk_mhz());
104 }
105 }
106
107 return 0;
108 }
109