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
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* 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 <device/device.h>
#include <device/pci.h>
#include <console/console.h>
#include <arch/acpi.h>
#include <arch/io.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/smm.h>
#include <string.h>
#include "i82801dx.h"
/* I945 */
#define SMRAM 0x90
#define D_OPEN (1 << 6)
#define D_CLS (1 << 5)
#define D_LCK (1 << 4)
#define G_SMRAME (1 << 3)
#define C_BASE_SEG ((0 << 2) | (1 << 1) | (0 << 0))
/* While we read PMBASE dynamically in case it changed, let's
* initialize it with a sane value
*/
static u16 pmbase = PMBASE_ADDR;
/**
* @brief read and clear PM1_STS
* @return PM1_STS register
*/
static u16 reset_pm1_status(void)
{
u16 reg16;
reg16 = inw(pmbase + PM1_STS);
/* set status bits are cleared by writing 1 to them */
outw(reg16, pmbase + PM1_STS);
return reg16;
}
static void dump_pm1_status(u16 pm1_sts)
{
printk(BIOS_DEBUG, "PM1_STS: ");
if (pm1_sts & (1 << 15)) printk(BIOS_DEBUG, "WAK ");
if (pm1_sts & (1 << 14)) printk(BIOS_DEBUG, "PCIEXPWAK ");
if (pm1_sts & (1 << 11)) printk(BIOS_DEBUG, "PRBTNOR ");
if (pm1_sts & (1 << 10)) printk(BIOS_DEBUG, "RTC ");
if (pm1_sts & (1 << 8)) printk(BIOS_DEBUG, "PWRBTN ");
if (pm1_sts & (1 << 5)) printk(BIOS_DEBUG, "GBL ");
if (pm1_sts & (1 << 4)) printk(BIOS_DEBUG, "BM ");
if (pm1_sts & (1 << 0)) printk(BIOS_DEBUG, "TMROF ");
printk(BIOS_DEBUG, "\n");
}
/**
* @brief read and clear SMI_STS
* @return SMI_STS register
*/
static u32 reset_smi_status(void)
{
u32 reg32;
reg32 = inl(pmbase + SMI_STS);
/* set status bits are cleared by writing 1 to them */
outl(reg32, pmbase + SMI_STS);
return reg32;
}
static void dump_smi_status(u32 smi_sts)
{
printk(BIOS_DEBUG, "SMI_STS: ");
if (smi_sts & (1 << 26)) printk(BIOS_DEBUG, "SPI ");
if (smi_sts & (1 << 25)) printk(BIOS_DEBUG, "EL_SMI ");
if (smi_sts & (1 << 21)) printk(BIOS_DEBUG, "MONITOR ");
if (smi_sts & (1 << 20)) printk(BIOS_DEBUG, "PCI_EXP_SMI ");
if (smi_sts & (1 << 18)) printk(BIOS_DEBUG, "INTEL_USB2 ");
if (smi_sts & (1 << 17)) printk(BIOS_DEBUG, "LEGACY_USB2 ");
if (smi_sts & (1 << 16)) printk(BIOS_DEBUG, "SMBUS_SMI ");
if (smi_sts & (1 << 15)) printk(BIOS_DEBUG, "SERIRQ_SMI ");
if (smi_sts & (1 << 14)) printk(BIOS_DEBUG, "PERIODIC ");
if (smi_sts & (1 << 13)) printk(BIOS_DEBUG, "TCO ");
if (smi_sts & (1 << 12)) printk(BIOS_DEBUG, "DEVMON ");
if (smi_sts & (1 << 11)) printk(BIOS_DEBUG, "MCSMI ");
if (smi_sts & (1 << 10)) printk(BIOS_DEBUG, "GPI ");
if (smi_sts & (1 << 9)) printk(BIOS_DEBUG, "GPE0 ");
if (smi_sts & (1 << 8)) printk(BIOS_DEBUG, "PM1 ");
if (smi_sts & (1 << 6)) printk(BIOS_DEBUG, "SWSMI_TMR ");
if (smi_sts & (1 << 5)) printk(BIOS_DEBUG, "APM ");
if (smi_sts & (1 << 4)) printk(BIOS_DEBUG, "SLP_SMI ");
if (smi_sts & (1 << 3)) printk(BIOS_DEBUG, "LEGACY_USB ");
if (smi_sts & (1 << 2)) printk(BIOS_DEBUG, "BIOS ");
printk(BIOS_DEBUG, "\n");
}
/**
* @brief read and clear GPE0_STS
* @return GPE0_STS register
*/
static u32 reset_gpe0_status(void)
{
u32 reg32;
reg32 = inl(pmbase + GPE0_STS);
/* set status bits are cleared by writing 1 to them */
outl(reg32, pmbase + GPE0_STS);
return reg32;
}
static void dump_gpe0_status(u32 gpe0_sts)
{
int i;
printk(BIOS_DEBUG, "GPE0_STS: ");
for (i=31; i>= 16; i--) {
if (gpe0_sts & (1 << i)) printk(BIOS_DEBUG, "GPIO%d ", (i-16));
}
if (gpe0_sts & (1 << 14)) printk(BIOS_DEBUG, "USB4 ");
if (gpe0_sts & (1 << 13)) printk(BIOS_DEBUG, "PME_B0 ");
if (gpe0_sts & (1 << 12)) printk(BIOS_DEBUG, "USB3 ");
if (gpe0_sts & (1 << 11)) printk(BIOS_DEBUG, "PME ");
if (gpe0_sts & (1 << 10)) printk(BIOS_DEBUG, "EL_SCI/BATLOW ");
if (gpe0_sts & (1 << 9)) printk(BIOS_DEBUG, "PCI_EXP ");
if (gpe0_sts & (1 << 8)) printk(BIOS_DEBUG, "RI ");
if (gpe0_sts & (1 << 7)) printk(BIOS_DEBUG, "SMB_WAK ");
if (gpe0_sts & (1 << 6)) printk(BIOS_DEBUG, "TCO_SCI ");
if (gpe0_sts & (1 << 5)) printk(BIOS_DEBUG, "AC97 ");
if (gpe0_sts & (1 << 4)) printk(BIOS_DEBUG, "USB2 ");
if (gpe0_sts & (1 << 3)) printk(BIOS_DEBUG, "USB1 ");
if (gpe0_sts & (1 << 2)) printk(BIOS_DEBUG, "HOT_PLUG ");
if (gpe0_sts & (1 << 0)) printk(BIOS_DEBUG, "THRM ");
printk(BIOS_DEBUG, "\n");
}
/**
* @brief read and clear ALT_GP_SMI_STS
* @return ALT_GP_SMI_STS register
*/
static u16 reset_alt_gp_smi_status(void)
{
u16 reg16;
reg16 = inl(pmbase + ALT_GP_SMI_STS);
/* set status bits are cleared by writing 1 to them */
outl(reg16, pmbase + ALT_GP_SMI_STS);
return reg16;
}
static void dump_alt_gp_smi_status(u16 alt_gp_smi_sts)
{
int i;
printk(BIOS_DEBUG, "ALT_GP_SMI_STS: ");
for (i=15; i>= 0; i--) {
if (alt_gp_smi_sts & (1 << i)) printk(BIOS_DEBUG, "GPI%d ", i);
}
printk(BIOS_DEBUG, "\n");
}
/**
* @brief read and clear TCOx_STS
* @return TCOx_STS registers
*/
static u32 reset_tco_status(void)
{
u32 tcobase = pmbase + 0x60;
u32 reg32;
reg32 = inl(tcobase + 0x04);
/* set status bits are cleared by writing 1 to them */
outl(reg32 & ~(1<<18), tcobase + 0x04); // Don't clear BOOT_STS before SECOND_TO_STS
if (reg32 & (1 << 18))
outl(reg32 & (1<<18), tcobase + 0x04); // clear BOOT_STS
return reg32;
}
static void dump_tco_status(u32 tco_sts)
{
printk(BIOS_DEBUG, "TCO_STS: ");
if (tco_sts & (1 << 20)) printk(BIOS_DEBUG, "SMLINK_SLV ");
if (tco_sts & (1 << 18)) printk(BIOS_DEBUG, "BOOT ");
if (tco_sts & (1 << 17)) printk(BIOS_DEBUG, "SECOND_TO ");
if (tco_sts & (1 << 16)) printk(BIOS_DEBUG, "INTRD_DET ");
if (tco_sts & (1 << 12)) printk(BIOS_DEBUG, "DMISERR ");
if (tco_sts & (1 << 10)) printk(BIOS_DEBUG, "DMISMI ");
if (tco_sts & (1 << 9)) printk(BIOS_DEBUG, "DMISCI ");
if (tco_sts & (1 << 8)) printk(BIOS_DEBUG, "BIOSWR ");
if (tco_sts & (1 << 7)) printk(BIOS_DEBUG, "NEWCENTURY ");
if (tco_sts & (1 << 3)) printk(BIOS_DEBUG, "TIMEOUT ");
if (tco_sts & (1 << 2)) printk(BIOS_DEBUG, "TCO_INT ");
if (tco_sts & (1 << 1)) printk(BIOS_DEBUG, "SW_TCO ");
if (tco_sts & (1 << 0)) printk(BIOS_DEBUG, "NMI2SMI ");
printk(BIOS_DEBUG, "\n");
}
/**
* @brief Set the EOS bit
*/
static void smi_set_eos(void)
{
u8 reg8;
reg8 = inb(pmbase + SMI_EN);
reg8 |= EOS;
outb(reg8, pmbase + SMI_EN);
}
extern uint8_t smm_relocation_start, smm_relocation_end;
static void *default_smm_area = NULL;
static void smm_relocate(void)
{
u32 smi_en;
u16 pm1_en;
printk(BIOS_DEBUG, "Initializing SMM handler...");
pmbase = pci_read_config16(pcidev_on_root(0x1f, 0), 0x40) & 0xfffc;
printk(BIOS_SPEW, " ... pmbase = 0x%04x\n", pmbase);
smi_en = inl(pmbase + SMI_EN);
if (smi_en & APMC_EN) {
printk(BIOS_INFO, "SMI# handler already enabled?\n");
return;
}
default_smm_area = backup_default_smm_area();
/* copy the SMM relocation code */
memcpy((void *)0x38000, &smm_relocation_start,
&smm_relocation_end - &smm_relocation_start);
wbinvd();
printk(BIOS_DEBUG, "\n");
dump_smi_status(reset_smi_status());
dump_pm1_status(reset_pm1_status());
dump_gpe0_status(reset_gpe0_status());
dump_alt_gp_smi_status(reset_alt_gp_smi_status());
dump_tco_status(reset_tco_status());
/* Enable SMI generation:
* - on TCO events
* - on APMC writes (io 0xb2)
* - on writes to SLP_EN (sleep states)
* - on writes to GBL_RLS (bios commands)
* No SMIs:
* - on microcontroller writes (io 0x62/0x66)
*/
smi_en = 0; /* reset SMI enables */
#if 0
smi_en |= LEGACY_USB2_EN | LEGACY_USB_EN;
#endif
smi_en |= TCO_EN;
smi_en |= APMC_EN;
#if DEBUG_PERIODIC_SMIS
/* Set DEBUG_PERIODIC_SMIS in i82801gx.h to debug using
* periodic SMIs.
*/
smi_en |= PERIODIC_EN;
#endif
smi_en |= SLP_SMI_EN;
smi_en |= BIOS_EN;
/* The following need to be on for SMIs to happen */
smi_en |= EOS | GBL_SMI_EN;
outl(smi_en, pmbase + SMI_EN);
pm1_en = 0;
pm1_en |= PWRBTN_EN;
pm1_en |= GBL_EN;
outw(pm1_en, pmbase + PM1_EN);
/**
* There are several methods of raising a controlled SMI# via
* software, among them:
* - Writes to io 0xb2 (APMC)
* - Writes to the Local Apic ICR with Delivery mode SMI.
*
* Using the local apic is a bit more tricky. According to
* AMD Family 11 Processor BKDG no destination shorthand must be
* used.
* The whole SMM initialization is quite a bit hardware specific, so
* I'm not too worried about the better of the methods at the moment
*/
/* raise an SMI interrupt */
printk(BIOS_SPEW, " ... raise SMI#\n");
outb(0x00, 0xb2);
}
static void smm_install(void)
{
/* enable the SMM memory window */
pci_write_config8(pcidev_on_root(0, 0), SMRAM,
D_OPEN | G_SMRAME | C_BASE_SEG);
/* copy the real SMM handler */
memcpy((void *)0xa0000, _binary_smm_start,
_binary_smm_end - _binary_smm_start);
wbinvd();
/* close the SMM memory window and enable normal SMM */
pci_write_config8(pcidev_on_root(0, 0), SMRAM,
G_SMRAME | C_BASE_SEG);
}
void smm_init(void)
{
/* Put SMM code to 0xa0000 */
smm_install();
/* Put relocation code to 0x38000 and relocate SMBASE */
smm_relocate();
/* We're done. Make sure SMIs can happen! */
smi_set_eos();
}
void smm_init_completion(void)
{
restore_default_smm_area(default_smm_area);
}
void smm_lock(void)
{
/* LOCK the SMM memory window and enable normal SMM.
* After running this function, only a full reset can
* make the SMM registers writable again.
*/
printk(BIOS_DEBUG, "Locking SMM.\n");
pci_write_config8(pcidev_on_root(0, 0), SMRAM,
D_LCK | G_SMRAME | C_BASE_SEG);
}
void smm_setup_structures(void *gnvs, void *tcg, void *smi1)
{
/* The GDT or coreboot table is going to live here. But a long time
* after we relocated the GNVS, so this is not troublesome.
*/
*(u32 *)0x500 = (u32)gnvs;
*(u32 *)0x504 = (u32)tcg;
*(u32 *)0x508 = (u32)smi1;
outb(0xea, 0xb2);
}
|
