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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <stdlib.h>
#include <console/console.h>
#include <fallback.h>
#include <lib.h>
#include <program_loading.h>
#include <timestamp.h>
extern const struct payload_loader_ops vboot_payload_loader;
extern const struct payload_loader_ops cbfs_payload_loader;
static const struct payload_loader_ops *payload_ops[] = {
#if CONFIG_VBOOT_VERIFY_FIRMWARE
&vboot_payload_loader,
#endif
&cbfs_payload_loader,
};
static struct payload global_payload = {
.name = CONFIG_CBFS_PREFIX "/payload",
};
void __attribute__((weak)) mirror_payload(struct payload *payload)
{
return;
}
struct payload *payload_load(void)
{
int i;
void *entry;
const struct payload_loader_ops *ops;
struct payload *payload = &global_payload;
for (i = 0; i < ARRAY_SIZE(payload_ops); i++) {
ops = payload_ops[i];
if (ops->locate(payload) < 0) {
printk(BIOS_DEBUG, "%s: could not locate payload.\n",
ops->name);
continue;
}
printk(BIOS_DEBUG, "%s: located payload @ %p, %zu bytes.\n",
ops->name, payload->backing_store.data,
payload->backing_store.size);
break;
}
if (i == ARRAY_SIZE(payload_ops))
return NULL;
mirror_payload(payload);
entry = selfload(payload);
if (entry == NULL)
return NULL;
payload->entry = entry;
return payload;
}
void payload_run(const struct payload *payload)
{
if (payload == NULL)
return;
/* Reset to booting from this image as late as possible */
boot_successful();
printk(BIOS_DEBUG, "Jumping to boot code at %p\n", payload->entry);
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);
arch_payload_run(payload);
}
|
