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
|
/*
* 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 <string.h>
#include <arch/acpi.h>
#include <cbmem.h>
#include <console/console.h>
#include <console/streams.h>
#include <cpu/x86/tsc.h>
#include <program_loading.h>
#include <rmodule.h>
#include <ramstage_cache.h>
#include <string.h>
#if IS_ENABLED(CONFIG_CHROMEOS)
#include <vendorcode/google/chromeos/vboot_handoff.h>
#endif
#include <soc/pei_data.h>
#include <soc/pei_wrapper.h>
#include <soc/ramstage.h>
static inline struct ramstage_cache *next_cache(struct ramstage_cache *c)
{
return (struct ramstage_cache *)&c->program[c->size];
}
static pei_wrapper_entry_t load_refcode_from_cache(void)
{
struct ramstage_cache *c;
long cache_size;
printk(BIOS_DEBUG, "refcode loading from cache.\n");
c = ramstage_cache_location(&cache_size);
if (!ramstage_cache_is_valid(c)) {
printk(BIOS_DEBUG, "Invalid ramstage cache descriptor.\n");
return NULL;
}
c = next_cache(c);
if (!ramstage_cache_is_valid(c)) {
printk(BIOS_DEBUG, "Invalid refcode cache descriptor.\n");
return NULL;
}
printk(BIOS_DEBUG, "Loading cached reference code from 0x%08x(%x)\n",
c->load_address, c->size);
memcpy((void *)c->load_address, &c->program[0], c->size);
return (pei_wrapper_entry_t)c->entry_point;
}
static void cache_refcode(const struct rmod_stage_load *rsl)
{
struct ramstage_cache *c;
long cache_size;
c = ramstage_cache_location(&cache_size);
if (!ramstage_cache_is_valid(c)) {
printk(BIOS_DEBUG, "No place to cache reference code.\n");
return;
}
/* Determine how much remaining cache available. */
cache_size -= c->size + sizeof(*c);
if (cache_size < (sizeof(*c) + prog_size(rsl->prog))) {
printk(BIOS_DEBUG, "Not enough cache space for ref code.\n");
return;
}
c = next_cache(c);
c->magic = RAMSTAGE_CACHE_MAGIC;
c->entry_point = (uint32_t)(uintptr_t)prog_entry(rsl->prog);
c->load_address = (uint32_t)(uintptr_t)prog_start(rsl->prog);
c->size = prog_size(rsl->prog);
printk(BIOS_DEBUG, "Caching refcode at 0x%p(%x)\n",
&c->program[0], c->size);
memcpy(&c->program[0], (void *)c->load_address, c->size);
}
#if IS_ENABLED(CONFIG_CHROMEOS)
static int load_refcode_from_vboot(struct rmod_stage_load *refcode)
{
struct vboot_handoff *vboot_handoff;
const struct firmware_component *fwc;
struct cbfs_stage *stage;
vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
fwc = &vboot_handoff->components[CONFIG_VBOOT_REFCODE_INDEX];
if (vboot_handoff == NULL ||
vboot_handoff->selected_firmware == VB_SELECT_FIRMWARE_READONLY ||
CONFIG_VBOOT_REFCODE_INDEX >= MAX_PARSED_FW_COMPONENTS ||
fwc->size == 0 || fwc->address == 0)
return -1;
printk(BIOS_DEBUG, "refcode loading from vboot rw area.\n");
stage = (void *)(uintptr_t)fwc->address;
if (rmodule_stage_load(refcode, stage)) {
printk(BIOS_DEBUG, "Error loading reference code.\n");
return -1;
}
return 0;
}
#else
static int load_refcode_from_vboot(struct rmod_stage_load *refcode)
{
return -1;
}
#endif
static int load_refcode_from_cbfs(struct rmod_stage_load *refcode)
{
printk(BIOS_DEBUG, "refcode loading from cbfs.\n");
if (rmodule_stage_load_from_cbfs(refcode)) {
printk(BIOS_DEBUG, "Error loading reference code.\n");
return -1;
}
return 0;
}
static pei_wrapper_entry_t load_reference_code(void)
{
struct prog prog = {
.name = CONFIG_CBFS_PREFIX "/refcode",
};
struct rmod_stage_load refcode = {
.cbmem_id = CBMEM_ID_REFCODE,
.prog = &prog,
};
if (acpi_is_wakeup_s3()) {
return load_refcode_from_cache();
}
if (load_refcode_from_vboot(&refcode) ||
load_refcode_from_cbfs(&refcode))
return NULL;
/* Cache loaded reference code. */
cache_refcode(&refcode);
return prog_entry(&prog);
}
void broadwell_run_reference_code(void)
{
int ret, dummy;
struct pei_data pei_data;
pei_wrapper_entry_t entry;
memset(&pei_data, 0, sizeof(pei_data));
mainboard_fill_pei_data(&pei_data);
broadwell_fill_pei_data(&pei_data);
pei_data.boot_mode = acpi_slp_type;
pei_data.saved_data = (void *) &dummy;
entry = load_reference_code();
if (entry == NULL) {
printk(BIOS_ERR, "Reference code not found\n");
return;
}
/* Call into reference code. */
ret = entry(&pei_data);
if (ret != 0) {
printk(BIOS_ERR, "Reference code returned %d\n", ret);
return;
}
}
|
