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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 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 <cpu/x86/tsc.h>
#include <rmodule.h>
#include <ramstage_cache.h>
#include <baytrail/ramstage.h>
#include <baytrail/efi_wrapper.h>
static inline int is_s3_resume(void)
{
#if CONFIG_HAVE_ACPI_RESUME
return acpi_slp_type == 3;
#else
return 0;
#endif
}
static inline struct ramstage_cache *next_cache(struct ramstage_cache *c)
{
return (struct ramstage_cache *)&c->program[c->size];
}
static void ABI_X86 send_to_console(unsigned char b)
{
console_tx_byte(b);
}
static efi_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 (efi_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) + cbmem_entry_size(rsl->cbmem_entry))) {
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)rsl->entry;
c->load_address = (uint32_t)cbmem_entry_start(rsl->cbmem_entry);
c->size = cbmem_entry_size(rsl->cbmem_entry);;
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);
}
static efi_wrapper_entry_t load_refcode_from_cbfs(void)
{
struct rmod_stage_load refcode = {
.cbmem_id = CBMEM_ID_REFCODE,
.name = CONFIG_CBFS_PREFIX "/refcode",
};
printk(BIOS_DEBUG, "refcode loading from cbfs.\n");
if (rmodule_stage_load_from_cbfs(&refcode) || refcode.entry == NULL) {
printk(BIOS_DEBUG, "Error loading reference code.\n");
return NULL;
}
cache_refcode(&refcode);
return refcode.entry;
}
void baytrail_run_reference_code(void)
{
int ret;
efi_wrapper_entry_t entry;
struct efi_wrapper_params wrp = {
.version = EFI_WRAPPER_VER,
.console_out = send_to_console,
};
if (is_s3_resume()) {
entry = load_refcode_from_cache();
} else {
entry = load_refcode_from_cbfs();
}
if (entry == NULL)
return;
wrp.tsc_ticks_per_microsecond = tsc_freq_mhz();
/* Call into reference code. */
ret = entry(&wrp);
if (ret != 0) {
printk(BIOS_DEBUG, "Reference code returned %d\n", ret);
return;
}
}
|
