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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
*
* 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 <arch/io.h>
#include <console/console.h>
#include <delay.h>
#include <device/pci_ids.h>
#include <device/pci_def.h>
#include <halt.h>
#include <string.h>
#include <timestamp.h>
#include "me.h"
#include "pch.h"
static const char *me_ack_values[] = {
[ME_HFS_ACK_NO_DID] = "No DID Ack received",
[ME_HFS_ACK_RESET] = "Non-power cycle reset",
[ME_HFS_ACK_PWR_CYCLE] = "Power cycle reset",
[ME_HFS_ACK_S3] = "Go to S3",
[ME_HFS_ACK_S4] = "Go to S4",
[ME_HFS_ACK_S5] = "Go to S5",
[ME_HFS_ACK_GBL_RESET] = "Global Reset",
[ME_HFS_ACK_CONTINUE] = "Continue to boot"
};
static inline void pci_read_dword_ptr(void *ptr, int offset)
{
u32 dword = pci_read_config32(PCH_ME_DEV, offset);
memcpy(ptr, &dword, sizeof(dword));
}
void intel_early_me_status(void)
{
struct me_hfs hfs;
struct me_gmes gmes;
u32 id = pci_read_config32(PCH_ME_DEV, PCI_VENDOR_ID);
if ((id == 0xffffffff) || (id == 0x00000000) ||
(id == 0x0000ffff) || (id == 0xffff0000)) {
printk(BIOS_DEBUG, "Missing Intel ME PCI device.\n");
} else {
pci_read_dword_ptr(&hfs, PCI_ME_HFS);
pci_read_dword_ptr(&gmes, PCI_ME_GMES);
intel_me_status(&hfs, &gmes);
}
}
int intel_early_me_init(void)
{
int count;
struct me_uma uma;
struct me_hfs hfs;
printk(BIOS_INFO, "Intel ME early init\n");
/* Wait for ME UMA SIZE VALID bit to be set */
for (count = ME_RETRY; count > 0; --count) {
pci_read_dword_ptr(&uma, PCI_ME_UMA);
if (uma.valid)
break;
udelay(ME_DELAY);
}
if (!count) {
printk(BIOS_ERR, "ERROR: ME is not ready!\n");
return -1;
}
/* Check for valid firmware */
pci_read_dword_ptr(&hfs, PCI_ME_HFS);
if (hfs.fpt_bad) {
printk(BIOS_WARNING, "WARNING: ME has bad firmware\n");
return -1;
}
printk(BIOS_INFO, "Intel ME firmware is ready\n");
return 0;
}
int intel_early_me_uma_size(void)
{
struct me_uma uma;
pci_read_dword_ptr(&uma, PCI_ME_UMA);
if (uma.valid) {
printk(BIOS_DEBUG, "ME: Requested %uMB UMA\n", uma.size);
return uma.size;
}
printk(BIOS_DEBUG, "ME: Invalid UMA size\n");
return 0;
}
static inline void set_global_reset(int enable)
{
u32 etr3 = pci_read_config32(PCH_LPC_DEV, ETR3);
/* Clear CF9 Without Resume Well Reset Enable */
etr3 &= ~ETR3_CWORWRE;
/* CF9GR indicates a Global Reset */
if (enable)
etr3 |= ETR3_CF9GR;
else
etr3 &= ~ETR3_CF9GR;
pci_write_config32(PCH_LPC_DEV, ETR3, etr3);
}
int intel_early_me_init_done(u8 status)
{
u8 reset, errorcode, opmode;
u16 reg16;
u32 mebase_l, mebase_h;
u32 millisec;
u32 hfs, me_fws2;
struct me_did did = {
.init_done = ME_INIT_DONE,
.status = status
};
u32 meDID;
hfs = (pci_read_config32(PCI_DEV(0, 0x16, 0), PCI_ME_HFS) & 0xff000) >> 12;
opmode = (hfs & 0xf0) >> 4;
errorcode = hfs & 0xf;
if (opmode != ME_HFS_MODE_NORMAL) {
printk(BIOS_NOTICE, "ME: Wrong mode : %d\n", opmode);
//return 0;
}
if (errorcode) {
printk(BIOS_NOTICE, "ME: HFS error : %d\n", errorcode);
//return 0;
}
me_fws2 = pci_read_config32(PCI_DEV(0, 0x16, 0), 0x48);
printk(BIOS_NOTICE, "ME: FWS2: 0x%x\n", me_fws2);
printk(BIOS_NOTICE, "ME: Bist in progress: 0x%x\n", me_fws2 & 0x1);
printk(BIOS_NOTICE, "ME: ICC Status : 0x%x\n", (me_fws2 & 0x6) >> 1);
printk(BIOS_NOTICE, "ME: Invoke MEBx : 0x%x\n", (me_fws2 & 0x8) >> 3);
printk(BIOS_NOTICE, "ME: CPU replaced : 0x%x\n", (me_fws2 & 0x10) >> 4);
printk(BIOS_NOTICE, "ME: MBP ready : 0x%x\n", (me_fws2 & 0x20) >> 5);
printk(BIOS_NOTICE, "ME: MFS failure : 0x%x\n", (me_fws2 & 0x40) >> 6);
printk(BIOS_NOTICE, "ME: Warm reset req : 0x%x\n", (me_fws2 & 0x80) >> 7);
printk(BIOS_NOTICE, "ME: CPU repl valid : 0x%x\n", (me_fws2 & 0x100) >> 8);
printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0x600) >> 9);
printk(BIOS_NOTICE, "ME: FW update req : 0x%x\n", (me_fws2 & 0x800) >> 11);
printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0xf000) >> 12);
printk(BIOS_NOTICE, "ME: Current state : 0x%x\n", (me_fws2 & 0xff0000) >> 16);
printk(BIOS_NOTICE, "ME: Current PM event: 0x%x\n", (me_fws2 & 0xf000000) >> 24);
printk(BIOS_NOTICE, "ME: Progress code : 0x%x\n", (me_fws2 & 0xf0000000) >> 28);
// Poll CPU replaced for 50ms
millisec = 0;
while ((((me_fws2 & 0x100) >> 8) == 0) && millisec < 50) {
udelay(1000);
me_fws2 = pci_read_config32(PCI_DEV(0, 0x16, 0), 0x48);
millisec++;
}
if (millisec >= 50 || ((me_fws2 & 0x100) >> 8) == 0x0) {
printk(BIOS_NOTICE, "Waited long enough, or CPU was not replaced, continue...\n");
} else if ((me_fws2 & 0x100) == 0x100) {
if ((me_fws2 & 0x80) == 0x80) {
printk(BIOS_NOTICE, "CPU was replaced & warm reset required...\n");
reg16 = pci_read_config16(PCI_DEV(0, 31, 0), 0xa2) & ~0x80;
pci_write_config16(PCI_DEV(0, 31, 0), 0xa2, reg16);
set_global_reset(0);
outb(0x6, 0xcf9);
halt();
}
if (((me_fws2 & 0x10) == 0x10) && (me_fws2 & 0x80) == 0x00) {
printk(BIOS_NOTICE, "Full training required\n");
}
}
printk(BIOS_NOTICE, "PASSED! Tell ME that DRAM is ready\n");
/* MEBASE from MESEG_BASE[35:20] */
mebase_l = pci_read_config32(PCI_CPU_DEVICE, PCI_CPU_MEBASE_L);
mebase_h = pci_read_config32(PCI_CPU_DEVICE, PCI_CPU_MEBASE_H) & 0xf;
did.uma_base = (mebase_l >> 20) | (mebase_h << 12);
meDID = did.uma_base | (1 << 28);// | (1 << 23);
pci_write_config32(PCI_DEV(0, 0x16, 0), PCI_ME_H_GS, meDID);
/* Must wait for ME acknowledgement */
if (opmode == ME_HFS_MODE_DEBUG) {
printk(BIOS_NOTICE,
"ME: ME is reporting as disabled, "
"so not waiting for a response.\n");
} else {
timestamp_add_now(TS_ME_INFORM_DRAM_WAIT);
udelay(100);
millisec = 0;
do {
udelay(1000);
hfs = (pci_read_config32(
PCI_DEV(0, 0x16, 0), PCI_ME_HFS) & 0xfe000000)
>> 24;
millisec++;
} while ((((hfs & 0xf0) >> 4) != ME_HFS_BIOS_DRAM_ACK)
&& (millisec <= 5000));
timestamp_add_now(TS_ME_INFORM_DRAM_DONE);
}
me_fws2 = pci_read_config32(PCI_DEV(0, 0x16, 0), 0x48);
printk(BIOS_NOTICE, "ME: FWS2: 0x%x\n", me_fws2);
printk(BIOS_NOTICE, "ME: Bist in progress: 0x%x\n", me_fws2 & 0x1);
printk(BIOS_NOTICE, "ME: ICC Status : 0x%x\n", (me_fws2 & 0x6) >> 1);
printk(BIOS_NOTICE, "ME: Invoke MEBx : 0x%x\n", (me_fws2 & 0x8) >> 3);
printk(BIOS_NOTICE, "ME: CPU replaced : 0x%x\n", (me_fws2 & 0x10) >> 4);
printk(BIOS_NOTICE, "ME: MBP ready : 0x%x\n", (me_fws2 & 0x20) >> 5);
printk(BIOS_NOTICE, "ME: MFS failure : 0x%x\n", (me_fws2 & 0x40) >> 6);
printk(BIOS_NOTICE, "ME: Warm reset req : 0x%x\n", (me_fws2 & 0x80) >> 7);
printk(BIOS_NOTICE, "ME: CPU repl valid : 0x%x\n", (me_fws2 & 0x100) >> 8);
printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0x600) >> 9);
printk(BIOS_NOTICE, "ME: FW update req : 0x%x\n", (me_fws2 & 0x800) >> 11);
printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0xf000) >> 12);
printk(BIOS_NOTICE, "ME: Current state : 0x%x\n", (me_fws2 & 0xff0000) >> 16);
printk(BIOS_NOTICE, "ME: Current PM event: 0x%x\n", (me_fws2 & 0xf000000) >> 24);
printk(BIOS_NOTICE, "ME: Progress code : 0x%x\n", (me_fws2 & 0xf0000000) >> 28);
/* Return the requested BIOS action */
printk(BIOS_NOTICE, "ME: Requested BIOS Action: %s\n",
me_ack_values[(hfs & 0xe) >> 1]);
reset = inb(0xcf9);
reset &= 0xf1;
switch ((hfs & 0xe) >> 1) {
case ME_HFS_ACK_NO_DID:
case ME_HFS_ACK_CONTINUE:
/* Continue to boot */
return 0;
case ME_HFS_ACK_RESET:
/* Non-power cycle reset */
set_global_reset(0);
reset |= 0x06;
break;
case ME_HFS_ACK_PWR_CYCLE:
/* Power cycle reset */
set_global_reset(0);
reset |= 0x0e;
break;
case ME_HFS_ACK_GBL_RESET:
/* Global reset */
set_global_reset(1);
reset |= 0x0e;
break;
case ME_HFS_ACK_S3:
case ME_HFS_ACK_S4:
case ME_HFS_ACK_S5:
break;
}
/* Perform the requested reset */
if (reset) {
outb(reset, 0xcf9);
halt();
}
return -1;
}
|
