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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/*
* This file is part of the coreboot project.
*
* Copyright 2015 Google Inc.
*
* 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 <stdlib.h>
#include <cbfs.h>
#include <cbmem.h>
#include <console/console.h>
#include <fallback.h>
#include <halt.h>
#include <lib.h>
#include <program_loading.h>
#include <reset.h>
#include <romstage_handoff.h>
#include <rmodule.h>
#include <rules.h>
#include <stage_cache.h>
#include <symbols.h>
#include <timestamp.h>
/* Only can represent up to 1 byte less than size_t. */
const struct mem_region_device addrspace_32bit =
MEM_REGION_DEV_RO_INIT(0, ~0UL);
int prog_locate(struct prog *prog)
{
struct cbfsf file;
cbfs_prepare_program_locate();
if (cbfs_boot_locate(&file, prog_name(prog), NULL))
return -1;
cbfs_file_data(prog_rdev(prog), &file);
return 0;
}
void run_romstage(void)
{
struct prog romstage =
PROG_INIT(PROG_ROMSTAGE, CONFIG_CBFS_PREFIX "/romstage");
if (prog_locate(&romstage))
goto fail;
timestamp_add_now(TS_START_COPYROM);
if (cbfs_prog_stage_load(&romstage))
goto fail;
timestamp_add_now(TS_END_COPYROM);
prog_run(&romstage);
fail:
if (IS_ENABLED(CONFIG_BOOTBLOCK_CONSOLE))
die("Couldn't load romstage.\n");
halt();
}
void __attribute__((weak)) stage_cache_add(int stage_id,
const struct prog *stage) {}
void __attribute__((weak)) stage_cache_load_stage(int stage_id,
struct prog *stage) {}
static void ramstage_cache_invalid(void)
{
printk(BIOS_ERR, "ramstage cache invalid.\n");
if (IS_ENABLED(CONFIG_RESET_ON_INVALID_RAMSTAGE_CACHE)) {
hard_reset();
halt();
}
}
static void run_ramstage_from_resume(struct romstage_handoff *handoff,
struct prog *ramstage)
{
if (handoff != NULL && handoff->s3_resume) {
/* Load the cached ramstage to runtime location. */
stage_cache_load_stage(STAGE_RAMSTAGE, ramstage);
if (prog_entry(ramstage) != NULL) {
printk(BIOS_DEBUG, "Jumping to image.\n");
prog_run(ramstage);
}
ramstage_cache_invalid();
}
}
static int load_relocatable_ramstage(struct prog *ramstage)
{
struct rmod_stage_load rmod_ram = {
.cbmem_id = CBMEM_ID_RAMSTAGE,
.prog = ramstage,
};
return rmodule_stage_load(&rmod_ram);
}
void run_ramstage(void)
{
struct prog ramstage =
PROG_INIT(PROG_RAMSTAGE, CONFIG_CBFS_PREFIX "/ramstage");
timestamp_add_now(TS_END_ROMSTAGE);
/*
* Only x86 systems using ramstage stage cache currently take the same
* firmware path on resume.
*/
if (IS_ENABLED(CONFIG_ARCH_X86) &&
!IS_ENABLED(CONFIG_NO_STAGE_CACHE) &&
IS_ENABLED(CONFIG_EARLY_CBMEM_INIT))
run_ramstage_from_resume(romstage_handoff_find_or_add(),
&ramstage);
if (prog_locate(&ramstage))
goto fail;
timestamp_add_now(TS_START_COPYRAM);
if (IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE)) {
if (load_relocatable_ramstage(&ramstage))
goto fail;
} else if (cbfs_prog_stage_load(&ramstage))
goto fail;
stage_cache_add(STAGE_RAMSTAGE, &ramstage);
timestamp_add_now(TS_END_COPYRAM);
prog_run(&ramstage);
fail:
die("Ramstage was not loaded!\n");
}
#ifdef __RAMSTAGE__ // gc-sections should take care of this
static struct prog global_payload =
PROG_INIT(PROG_PAYLOAD, CONFIG_CBFS_PREFIX "/payload");
void __attribute__((weak)) mirror_payload(struct prog *payload)
{
return;
}
void payload_load(void)
{
struct prog *payload = &global_payload;
timestamp_add_now(TS_LOAD_PAYLOAD);
if (prog_locate(payload))
goto out;
mirror_payload(payload);
/* Pass cbtables to payload if architecture desires it. */
prog_set_entry(payload, selfload(payload, true),
cbmem_find(CBMEM_ID_CBTABLE));
out:
if (prog_entry(payload) == NULL)
die("Payload not loaded.\n");
}
void payload_run(void)
{
struct prog *payload = &global_payload;
/* Reset to booting from this image as late as possible */
boot_successful();
printk(BIOS_DEBUG, "Jumping to boot code at %p(%p)\n",
prog_entry(payload), prog_entry_arg(payload));
post_code(POST_ENTER_ELF_BOOT);
timestamp_add_now(TS_SELFBOOT_JUMP);
/* Before we go off to run the payload, see if
* we stayed within our bounds.
*/
checkstack(_estack, 0);
prog_run(payload);
}
#endif
|
