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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Advanced Micro Devices, Inc.
* Copyright (C) 2015 Raptor Engineering
*
* 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 <console/console.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/microcode.h>
#include <cbfs.h>
#include <arch/io.h>
#include <smp/spinlock.h>
#define UCODE_DEBUG(fmt, args...) \
do { printk(BIOS_DEBUG, "[microcode] "fmt, ##args); } while (0)
#define UCODE_MAGIC 0x00414d44
#define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000
#define UCODE_SECTION_START_ID 0x00000001
#define UCODE_MAGIC 0x00414d44
#define F1XH_MPB_MAX_SIZE 2048
#define F15H_MPB_MAX_SIZE 4096
#define CONT_HDR 12
#define SECT_HDR 8
/*
* STRUCTURE OF A MICROCODE (UCODE) FILE
* Container Header
* Section Header
* Microcode Header
* Microcode "Blob"
* Section Header
* Microcode Header
* Microcode "Blob"
* ...
* ...
* (end of file)
*
*
* CONTAINER HEADER (offset 0 bytes from start of file)
* Total size = fixed size (12 bytes) + variable size
* [0:3] 32-bit unique ID
* [4:7] don't-care
* [8-11] Size (n) in bytes of variable portion of container header
* [12-n] don't-care
*
* SECTION HEADER (offset += 12+n)
* Total size = 8 bytes
* [0:3] Unique identifier signaling start of section (0x00000001)
* [4:7] Total size (m) of following microcode section, including microcode header
*
* MICROCODE HEADER (offset += 8)
* Total size = 64 bytes
* [0:3] Data code (32 bits)
* [4:7] Patch ID (32 bits)
* [8:9] Microcode patch data ID (16 bits)
* [10] c patch data length (8 bits)
* [11] init flag (8 bits)
* [12:15] ucode patch data cksum (32 bits)
* [16:19] nb dev ID (32 bits)
* [20:23] sb dev ID (32 bits)
* [24:25] Processor rev ID (16 bits)
* [26] nb revision ID (8 bits)
* [27] sb revision ID (8 bits)
* [28] BIOS API revision (8 bits)
* [29-31] Reserved 1 (array of three 8-bit values)
* [32-63] Match reg (array of eight 32-bit values)
*
* MICROCODE BLOB (offset += 64)
* Total size = m bytes
*
*/
struct microcode {
uint32_t data_code;
uint32_t patch_id;
uint16_t mc_patch_data_id;
uint8_t mc_patch_data_len;
uint8_t init_flag;
uint32_t mc_patch_data_checksum;
uint32_t nb_dev_id;
uint32_t sb_dev_id;
uint16_t processor_rev_id;
uint8_t nb_rev_id;
uint8_t sb_rev_id;
uint8_t bios_api_rev;
uint8_t reserved1[3];
uint32_t match_reg[8];
uint8_t m_patch_data[896];
uint8_t resv2[896];
uint8_t x86_code_present;
uint8_t x86_code_entry[191];
};
static void apply_microcode_patch(const struct microcode *m)
{
uint32_t new_patch_id;
msr_t msr;
/* apply patch */
msr.hi = 0;
msr.lo = (uint32_t)m;
wrmsr(0xc0010020, msr);
UCODE_DEBUG("patch id to apply = 0x%08x\n", m->patch_id);
/* read the patch_id again */
msr = rdmsr(0x8b);
new_patch_id = msr.lo;
UCODE_DEBUG("updated to patch id = 0x%08x %s\n", new_patch_id ,
(new_patch_id == m->patch_id) ? "success" : "fail");
}
static void amd_update_microcode(const void *ucode, size_t ucode_len,
uint32_t equivalent_processor_rev_id)
{
const struct microcode *m;
const uint8_t *c = ucode;
const uint8_t *ucode_end = (uint8_t*)ucode + ucode_len;
const uint8_t *cur_section_hdr;
uint32_t container_hdr_id;
uint32_t container_hdr_size;
uint32_t blob_size;
uint32_t sec_hdr_id;
/* Container Header */
container_hdr_id = read32(c);
if (container_hdr_id != UCODE_MAGIC) {
UCODE_DEBUG("Invalid container header ID\n");
return;
}
container_hdr_size = read32(c + 8);
cur_section_hdr = c + CONT_HDR + container_hdr_size;
/* Read in first section header ID */
sec_hdr_id = read32(cur_section_hdr);
c = cur_section_hdr + 4;
/* Loop through sections */
while (sec_hdr_id == UCODE_SECTION_START_ID &&
c <= (ucode_end - F15H_MPB_MAX_SIZE)) {
blob_size = read32(c);
m = (struct microcode *)(c + 4);
if (m->processor_rev_id == equivalent_processor_rev_id) {
apply_microcode_patch(m);
break;
}
cur_section_hdr = c + 4 + blob_size;
sec_hdr_id = read32(cur_section_hdr);
c = cur_section_hdr + 4;
}
}
static const char *microcode_cbfs_file[] = {
"microcode_amd.bin",
"microcode_amd_fam15h.bin",
};
void amd_update_microcode_from_cbfs(uint32_t equivalent_processor_rev_id)
{
const void *ucode;
size_t ucode_len;
uint32_t i;
for (i = 0; i < ARRAY_SIZE(microcode_cbfs_file); i++)
{
if (equivalent_processor_rev_id == 0) {
UCODE_DEBUG("rev id not found. Skipping microcode patch!\n");
return;
}
#ifdef __PRE_RAM__
#if IS_ENABLED(CONFIG_HAVE_ROMSTAGE_MICROCODE_CBFS_SPINLOCK)
spin_lock(romstage_microcode_cbfs_lock());
#endif
#endif
ucode = cbfs_boot_map_with_leak(microcode_cbfs_file[i],
CBFS_TYPE_MICROCODE, &ucode_len);
if (!ucode) {
UCODE_DEBUG("microcode file not found. Skipping updates.\n");
#ifdef __PRE_RAM__
#if IS_ENABLED(CONFIG_HAVE_ROMSTAGE_MICROCODE_CBFS_SPINLOCK)
spin_unlock(romstage_microcode_cbfs_lock());
#endif
#endif
return;
}
amd_update_microcode(ucode, ucode_len, equivalent_processor_rev_id);
#ifdef __PRE_RAM__
#if IS_ENABLED(CONFIG_HAVE_ROMSTAGE_MICROCODE_CBFS_SPINLOCK)
spin_unlock(romstage_microcode_cbfs_lock());
#endif
#endif
}
}
|
