summaryrefslogtreecommitdiff
path: root/src/console/post.c
blob: 64aa2a5513359801351a98049b49d6f6b9cd7712 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/*
 * This file is part of the coreboot project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of
 * the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <stdint.h>
#include <elog.h>
#include <console/console.h>
#include <device/device.h>
#include <pc80/mc146818rtc.h>
#include <smp/spinlock.h>
#if CONFIG(POST_IO)
#include <arch/io.h>
#endif

/* Write POST information */

/* someday romcc will be gone. */
#ifndef __ROMCC__
/* Some mainboards have very nice features beyond just a simple display.
 * They can override this function.
 */
void __weak mainboard_post(uint8_t value)
{
}

#else
/* This just keeps the number of #ifs to a minimum */
#define mainboard_post(x)
#endif

#if CONFIG(CMOS_POST)

DECLARE_SPIN_LOCK(cmos_post_lock)

void cmos_post_log(void)
{
	u8 code = 0;
#if CONFIG(CMOS_POST_EXTRA)
	u32 extra = 0;
#endif

	spin_lock(&cmos_post_lock);

	/* Get post code from other bank */
	switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
	case CMOS_POST_BANK_0_MAGIC:
		code = cmos_read(CMOS_POST_BANK_1_OFFSET);
#if CONFIG(CMOS_POST_EXTRA)
		extra = cmos_read32(CMOS_POST_BANK_1_EXTRA);
#endif
		break;
	case CMOS_POST_BANK_1_MAGIC:
		code = cmos_read(CMOS_POST_BANK_0_OFFSET);
#if CONFIG(CMOS_POST_EXTRA)
		extra = cmos_read32(CMOS_POST_BANK_0_EXTRA);
#endif
		break;
	}

	spin_unlock(&cmos_post_lock);

	/* Check last post code in previous boot against normal list */
	switch (code) {
	case POST_OS_BOOT:
	case POST_OS_RESUME:
	case POST_ENTER_ELF_BOOT:
	case 0:
		break;
	default:
		printk(BIOS_WARNING, "POST: Unexpected post code "
		       "in previous boot: 0x%02x\n", code);
#if CONFIG(ELOG) && (ENV_RAMSTAGE || CONFIG(ELOG_PRERAM))
		elog_add_event_word(ELOG_TYPE_LAST_POST_CODE, code);
#if CONFIG(CMOS_POST_EXTRA)
		if (extra)
			elog_add_event_dword(ELOG_TYPE_POST_EXTRA, extra);
#endif
#endif
	}
}

#if CONFIG(CMOS_POST_EXTRA)
void post_log_extra(u32 value)
{
	spin_lock(&cmos_post_lock);

	switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
	case CMOS_POST_BANK_0_MAGIC:
		cmos_write32(CMOS_POST_BANK_0_EXTRA, value);
		break;
	case CMOS_POST_BANK_1_MAGIC:
		cmos_write32(CMOS_POST_BANK_1_EXTRA, value);
		break;
	}

	spin_unlock(&cmos_post_lock);
}

void post_log_path(const struct device *dev)
{
	if (dev) {
		/* Encode path into lower 3 bytes */
		u32 path = dev_path_encode(dev);
		/* Upper byte contains the log type */
		path |= CMOS_POST_EXTRA_DEV_PATH << 24;
		post_log_extra(path);
	}
}

void post_log_clear(void)
{
	post_log_extra(0);
}
#endif /* CONFIG_CMOS_POST_EXTRA */

static void cmos_post_code(u8 value)
{
	spin_lock(&cmos_post_lock);

	switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
	case CMOS_POST_BANK_0_MAGIC:
		cmos_write(value, CMOS_POST_BANK_0_OFFSET);
		break;
	case CMOS_POST_BANK_1_MAGIC:
		cmos_write(value, CMOS_POST_BANK_1_OFFSET);
		break;
	}

	spin_unlock(&cmos_post_lock);
}
#endif /* CONFIG_CMOS_POST */

void post_code(uint8_t value)
{
#if !CONFIG(NO_POST)
#if CONFIG(CONSOLE_POST)
	printk(BIOS_EMERG, "POST: 0x%02x\n", value);
#endif
#if CONFIG(CMOS_POST)
	cmos_post_code(value);
#endif
#if CONFIG(POST_IO)
	outb(value, CONFIG_POST_IO_PORT);
#endif
#endif
	mainboard_post(value);
}