summaryrefslogtreecommitdiff
path: root/src/arch/i386/boot/acpi.c
blob: 7a6221a2ef1a35a1e241f65eed234d4bed3d4d57 (plain)
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
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
/*
 * This file is part of the coreboot project.
 *
 * coreboot ACPI Table support
 * written by Stefan Reinauer <stepan@openbios.org>
 *
 * Copyright (C) 2004 SUSE LINUX AG
 * Copyright (C) 2005-2009 coresystems GmbH
 *
 * ACPI FADT, FACS, and DSDT table support added by 
 * Nick Barker <nick.barker9@btinternet.com>, and those portions
 * Copyright (C) 2004 Nick Barker
 *
 * Copyright (C) 2005 ADVANCED MICRO DEVICES, INC. All Rights Reserved.
 * 2005.9 yhlu add SRAT table generation
 */

/* 
 * Each system port implementing ACPI has to provide two functions:
 * 
 *   write_acpi_tables()
 *   acpi_dump_apics()
 *   
 * See Kontron 986LCD-M port for a good example of an ACPI implementation
 * in coreboot.
 */

#include <console/console.h>
#include <string.h>
#include <arch/acpi.h>
#include <arch/acpigen.h>
#include <device/pci.h>
#include <cbmem.h>

u8 acpi_checksum(u8 *table, u32 length)
{
	u8 ret=0;
	while (length--) {
		ret += *table;
		table++;
	}
	return -ret;
}

/**
 * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length and checksum
 */

void acpi_add_table(acpi_rsdp_t *rsdp, void *table)
{
	int i, entries_num;
	acpi_rsdt_t *rsdt;
	acpi_xsdt_t *xsdt = NULL;

	/* The RSDT is mandatory ... */
	rsdt = (acpi_rsdt_t *)rsdp->rsdt_address;

	/* ... while the XSDT is not */
	if (rsdp->xsdt_address) {
		xsdt = (acpi_xsdt_t *)((u32)rsdp->xsdt_address);
	}
	
	/* This should always be MAX_ACPI_TABLES */
	entries_num = ARRAY_SIZE(rsdt->entry);
	
	for (i = 0; i < entries_num; i++) {
		if(rsdt->entry[i] == 0)
			break;
	}

	if (i >= entries_num) {
		printk_err("ACPI: Error: Could not add ACPI table, too many tables.\n");
		return;
	}

	/* Add table to the RSDT */
	rsdt->entry[i] = (u32)table;

	/* Fix RSDT length or the kernel will assume invalid entries */
	rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i+1));

	/* Re-calculate checksum */
	rsdt->header.checksum = 0; /* Hope this won't get optimized away */
	rsdt->header.checksum = acpi_checksum((u8 *)rsdt,
			rsdt->header.length);

	/* And now the same thing for the XSDT. We use the same index as for
	 * now we want the XSDT and RSDT to always be in sync in coreboot.
	 */
	if (xsdt) {
		/* Add table to the XSDT */
		xsdt->entry[i]=(u64)(u32)table;

		/* Fix XSDT length */
		xsdt->header.length = sizeof(acpi_header_t) +
			(sizeof(u64) * (i+1));

		/* Re-calculate checksum */
		xsdt->header.checksum=0;
		xsdt->header.checksum=acpi_checksum((u8 *)xsdt,
				xsdt->header.length);
	}

	printk_debug("ACPI: added table %d/%d Length now %d\n",
			i+1, entries_num, rsdt->header.length);
}

int acpi_create_mcfg_mmconfig(acpi_mcfg_mmconfig_t *mmconfig, u32 base, u16 seg_nr, u8 start, u8 end)
{
	mmconfig->base_address = base;
	mmconfig->base_reserved = 0;
	mmconfig->pci_segment_group_number = seg_nr;
	mmconfig->start_bus_number = start;
	mmconfig->end_bus_number = end;
	return (sizeof(acpi_mcfg_mmconfig_t));
}

int acpi_create_madt_lapic(acpi_madt_lapic_t *lapic, u8 cpu, u8 apic)
{
	lapic->type=0;
	lapic->length=sizeof(acpi_madt_lapic_t);
	lapic->flags=1;
	
	lapic->processor_id=cpu;
	lapic->apic_id=apic;
	
	return(lapic->length);
}

unsigned long acpi_create_madt_lapics(unsigned long current)
{
	device_t cpu;
	int cpu_index = 0;

	for(cpu = all_devices; cpu; cpu = cpu->next) {
		if ((cpu->path.type != DEVICE_PATH_APIC) ||
		   (cpu->bus->dev->path.type != DEVICE_PATH_APIC_CLUSTER)) {
			continue;
		}
		if (!cpu->enabled) {
			continue;
		}
		current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, cpu_index, cpu->path.apic.apic_id);
		cpu_index++;
	}
	return current;
}

int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,u32 gsi_base) 
{
	ioapic->type=1;
	ioapic->length=sizeof(acpi_madt_ioapic_t);
	ioapic->reserved=0x00;
	ioapic->gsi_base=gsi_base;
	
	ioapic->ioapic_id=id;
	ioapic->ioapic_addr=addr;
	
	return(ioapic->length);
}

int acpi_create_madt_irqoverride(acpi_madt_irqoverride_t *irqoverride,
		u8 bus, u8 source, u32 gsirq, u16 flags)
{
	irqoverride->type=2;
	irqoverride->length=sizeof(acpi_madt_irqoverride_t);
	irqoverride->bus=bus;
	irqoverride->source=source;
	irqoverride->gsirq=gsirq;
	irqoverride->flags=flags;
	
	return(irqoverride->length);
}

int acpi_create_madt_lapic_nmi(acpi_madt_lapic_nmi_t *lapic_nmi, u8 cpu,
		u16 flags, u8 lint)
{
	lapic_nmi->type=4;
	lapic_nmi->length=sizeof(acpi_madt_lapic_nmi_t);
	
	lapic_nmi->flags=flags;
	lapic_nmi->processor_id=cpu;
	lapic_nmi->lint=lint;
	
	return(lapic_nmi->length);
}

void acpi_create_madt(acpi_madt_t *madt)
{
#define LOCAL_APIC_ADDR	0xfee00000ULL
	
	acpi_header_t *header=&(madt->header);
	unsigned long current=(unsigned long)madt+sizeof(acpi_madt_t);
	
	memset((void *)madt, 0, sizeof(acpi_madt_t));
	
	/* fill out header fields */
	memcpy(header->signature, "APIC", 4);
	memcpy(header->oem_id, OEM_ID, 6);
	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
	memcpy(header->asl_compiler_id, ASLC, 4);
	
	header->length = sizeof(acpi_madt_t);
	header->revision = 1;

	madt->lapic_addr= LOCAL_APIC_ADDR;
	madt->flags	= 0x1; /* PCAT_COMPAT */

	current = acpi_fill_madt(current);
	
	/* recalculate length */
	header->length= current - (unsigned long)madt;
	
	header->checksum	= acpi_checksum((void *)madt, header->length);
}

void acpi_create_mcfg(acpi_mcfg_t *mcfg)
{

	acpi_header_t *header=&(mcfg->header);
	unsigned long current=(unsigned long)mcfg+sizeof(acpi_mcfg_t);
	
	memset((void *)mcfg, 0, sizeof(acpi_mcfg_t));
	
	/* fill out header fields */
	memcpy(header->signature, "MCFG", 4);
	memcpy(header->oem_id, OEM_ID, 6);
	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
	memcpy(header->asl_compiler_id, ASLC, 4);
	
	header->length = sizeof(acpi_mcfg_t);
	header->revision = 1;

	current = acpi_fill_mcfg(current);
	
	/* recalculate length */
	header->length= current - (unsigned long)mcfg;
	
	header->checksum	= acpi_checksum((void *)mcfg, header->length);
}

/* this can be overriden by platform ACPI setup code,
 * if it calls acpi_create_ssdt_generator
 */
unsigned long __attribute__((weak)) acpi_fill_ssdt_generator(unsigned long current,
						    const char *oem_table_id) {
	return current;
}

void acpi_create_ssdt_generator(acpi_header_t *ssdt, const char *oem_table_id)
{
	unsigned long current=(unsigned long)ssdt+sizeof(acpi_header_t);
	memset((void *)ssdt, 0, sizeof(acpi_header_t));
	memcpy(&ssdt->signature, "SSDT", 4);
	ssdt->revision = 2;
	memcpy(&ssdt->oem_id, OEM_ID, 6);
	memcpy(&ssdt->oem_table_id, oem_table_id, 8);
	ssdt->oem_revision = 42;
	memcpy(&ssdt->asl_compiler_id, "CORE", 4);
	ssdt->asl_compiler_revision = 42;
	ssdt->length = sizeof(acpi_header_t);

	acpigen_set_current((char *) current);
	current = acpi_fill_ssdt_generator(current, oem_table_id);

	/* recalculate length */
	ssdt->length = current - (unsigned long)ssdt;
	ssdt->checksum = acpi_checksum((void *)ssdt, ssdt->length);
}

int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic)
{
	memset((void *)lapic, 0, sizeof(acpi_srat_lapic_t));
        lapic->type=0;
        lapic->length=sizeof(acpi_srat_lapic_t);
        lapic->flags=1;

        lapic->proximity_domain_7_0 = node;
        lapic->apic_id=apic;

        return(lapic->length);
}

int acpi_create_srat_mem(acpi_srat_mem_t *mem, u8 node, u32 basek,u32 sizek, u32 flags)
{
        mem->type=1;
        mem->length=sizeof(acpi_srat_mem_t);

        mem->base_address_low = (basek<<10);
	mem->base_address_high = (basek>>(32-10));

        mem->length_low = (sizek<<10);
        mem->length_high = (sizek>>(32-10));

        mem->proximity_domain = node;

	mem->flags = flags; 

        return(mem->length);
}

void acpi_create_srat(acpi_srat_t *srat)
{

        acpi_header_t *header=&(srat->header);
        unsigned long current=(unsigned long)srat+sizeof(acpi_srat_t);

        memset((void *)srat, 0, sizeof(acpi_srat_t));

        /* fill out header fields */
        memcpy(header->signature, "SRAT", 4);
        memcpy(header->oem_id, OEM_ID, 6);
        memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
        memcpy(header->asl_compiler_id, ASLC, 4);

        header->length = sizeof(acpi_srat_t);
        header->revision = 1;

        srat->resv     = 0x1; /* BACK COMP */

        current = acpi_fill_srat(current);

        /* recalculate length */
        header->length= current - (unsigned long)srat;

        header->checksum        = acpi_checksum((void *)srat, header->length);
}

void acpi_create_slit(acpi_slit_t *slit)
{

        acpi_header_t *header=&(slit->header);
        unsigned long current=(unsigned long)slit+sizeof(acpi_slit_t);

        memset((void *)slit, 0, sizeof(acpi_slit_t));

        /* fill out header fields */
        memcpy(header->signature, "SLIT", 4);
        memcpy(header->oem_id, OEM_ID, 6);
        memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
        memcpy(header->asl_compiler_id, ASLC, 4);

        header->length = sizeof(acpi_slit_t);
        header->revision = 1;

        current = acpi_fill_slit(current);

        /* recalculate length */
        header->length= current - (unsigned long)slit;

        header->checksum        = acpi_checksum((void *)slit, header->length);
}

void acpi_create_hpet(acpi_hpet_t *hpet)
{
#define HPET_ADDR  0xfed00000ULL
	acpi_header_t *header=&(hpet->header);
	acpi_addr_t *addr=&(hpet->addr);
	
	memset((void *)hpet, 0, sizeof(acpi_hpet_t));
	
	/* fill out header fields */
	memcpy(header->signature, "HPET", 4);
	memcpy(header->oem_id, OEM_ID, 6);
	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
	memcpy(header->asl_compiler_id, ASLC, 4);
	
	header->length = sizeof(acpi_hpet_t);
	header->revision = 1;

	/* fill out HPET address */
	addr->space_id		= 0; /* Memory */
	addr->bit_width		= 64;
	addr->bit_offset	= 0;
	addr->addrl		= HPET_ADDR & 0xffffffff;
	addr->addrh		= HPET_ADDR >> 32;

	hpet->id	= 0x102282a0; /* AMD ? */
	hpet->number	= 0;
	hpet->min_tick  = 4096;
	
	header->checksum	= acpi_checksum((void *)hpet, sizeof(acpi_hpet_t));
}
void acpi_create_facs(acpi_facs_t *facs)
{
	
	memset( (void *)facs,0, sizeof(acpi_facs_t));

	memcpy(facs->signature, "FACS", 4);
	facs->length = sizeof(acpi_facs_t);
	facs->hardware_signature = 0;
	facs->firmware_waking_vector = 0;
	facs->global_lock = 0;
	facs->flags = 0;
	facs->x_firmware_waking_vector_l = 0;
	facs->x_firmware_waking_vector_h = 0;
	facs->version = 1;
}

void acpi_write_rsdt(acpi_rsdt_t *rsdt)
{ 
	acpi_header_t *header=&(rsdt->header);
	
	/* fill out header fields */
	memcpy(header->signature, "RSDT", 4);
	memcpy(header->oem_id, OEM_ID, 6);
	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
	memcpy(header->asl_compiler_id, ASLC, 4);
	
	header->length = sizeof(acpi_rsdt_t);
	header->revision = 1;
	
	/* fill out entries */

	// entries are filled in later, we come with an empty set.
	
	/* fix checksum */
	
	header->checksum = acpi_checksum((void *)rsdt, sizeof(acpi_rsdt_t));
}

void acpi_write_xsdt(acpi_xsdt_t *xsdt)
{ 
	acpi_header_t *header=&(xsdt->header);
	
	/* fill out header fields */
	memcpy(header->signature, "XSDT", 4);
	memcpy(header->oem_id, OEM_ID, 6);
	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
	memcpy(header->asl_compiler_id, ASLC, 4);
	
	header->length = sizeof(acpi_xsdt_t);
	header->revision = 1;
	
	/* fill out entries */

	// entries are filled in later, we come with an empty set.
	
	/* fix checksum */
	
	header->checksum = acpi_checksum((void *)xsdt, sizeof(acpi_xsdt_t));
}

void acpi_write_rsdp(acpi_rsdp_t *rsdp, acpi_rsdt_t *rsdt, acpi_xsdt_t *xsdt)
{
	memset(rsdp, 0, sizeof(acpi_rsdp_t));
	memcpy(rsdp->signature, RSDP_SIG, 8);
	memcpy(rsdp->oem_id, OEM_ID, 6);
	rsdp->length		= sizeof(acpi_rsdp_t);
	rsdp->rsdt_address	= (u32)rsdt;
	/* Some OSes expect an XSDT to be present for RSD PTR 
	 * revisions >= 2. If we don't have an ACPI XSDT, force
	 * ACPI 1.0 (and thus RSD PTR revision 0)
	 */
	if (xsdt == NULL) {
		rsdp->revision		= 0;
	} else {
		rsdp->xsdt_address	= (u64)(u32)xsdt;
		rsdp->revision		= 2;
	}
	rsdp->checksum		= acpi_checksum((void *)rsdp, 20);
	rsdp->ext_checksum	= acpi_checksum((void *)rsdp, sizeof(acpi_rsdp_t));
}

#if CONFIG_HAVE_ACPI_RESUME == 1
void suspend_resume(void)
{
	void *wake_vec;

#if 0
#if CONFIG_MEM_TRAIN_SEQ != 0
	#error "So far it works on AMD and CONFIG_MEM_TRAIN_SEQ == 0"
#endif

#if CONFIG_RAMBASE < 0x1F00000
	#error "For ACPI RESUME you need to have CONFIG_RAMBASE at least 31MB"
	#error "Chipset support (S3_NVRAM_EARLY and ACPI_IS_WAKEUP_EARLY functions and memory ctrl)"
	#error "And coreboot memory reserved in mainboard.c"
#endif
#endif
	/* if we happen to be resuming find wakeup vector and jump to OS */
	wake_vec = acpi_find_wakeup_vector();
	if (wake_vec)
		acpi_jump_to_wakeup(wake_vec);
}

/* this is to be filled by SB code - startup value what was found */
u8 acpi_slp_type = 0;

int acpi_is_wakeup(void)
{
	return (acpi_slp_type == 3);
}

static acpi_rsdp_t *valid_rsdp(acpi_rsdp_t *rsdp)
{
	if (strncmp((char *)rsdp, RSDP_SIG, sizeof(RSDP_SIG) - 1) != 0)
		return NULL;

	printk_debug("Looking on %p for valid checksum\n", rsdp);

	if (acpi_checksum((void *)rsdp, 20) != 0)
		return NULL;
	printk_debug("Checksum 1 passed\n");

	if ((rsdp->revision > 1) && (acpi_checksum((void *)rsdp,
						rsdp->length) != 0))
		return NULL;

	printk_debug("Checksum 2 passed all OK\n");

	return rsdp;
}

static acpi_rsdp_t *rsdp;

void *acpi_get_wakeup_rsdp(void)
{
	return rsdp;
}

void *acpi_find_wakeup_vector(void)
{
	char *p, *end;

	acpi_rsdt_t *rsdt;
	acpi_facs_t *facs;
	acpi_fadt_t *fadt;
	void  *wake_vec;
	int i;

	rsdp = NULL;

	if (!acpi_is_wakeup())
		return NULL;

	printk_debug("Trying to find the wakeup vector ...\n");

	/* find RSDP */
	for (p = (char *) 0xe0000; p <  (char *) 0xfffff; p+=16) {
		if ((rsdp = valid_rsdp((acpi_rsdp_t *) p)))
			break;
	}

	if (rsdp == NULL)
		return NULL;

	printk_debug("RSDP found at %p\n", rsdp);
	rsdt = (acpi_rsdt_t *) rsdp->rsdt_address;
	
	end = (char *) rsdt + rsdt->header.length;
	printk_debug("RSDT found at %p ends at %p\n", rsdt, end);

	for (i = 0; ((char *) &rsdt->entry[i]) < end; i++) {
		fadt = (acpi_fadt_t *) rsdt->entry[i];
		if (strncmp((char *)fadt, "FACP", 4) == 0)
			break;
		fadt = NULL;
	}

	if (fadt == NULL)
		return NULL;

	printk_debug("FADT found at %p\n", fadt);
	facs = (acpi_facs_t *)fadt->firmware_ctrl;

	if (facs == NULL) {
		printk_debug("No FACS found, wake up from S3 not possible.\n");
		return NULL;
	}

	printk_debug("FACS found at %p\n", facs);
	wake_vec = (void *) facs->firmware_waking_vector;
	printk_debug("OS waking vector is %p\n", wake_vec);
	return wake_vec;
}

extern char *lowmem_backup;
extern char *lowmem_backup_ptr;
extern int lowmem_backup_size;

#define WAKEUP_BASE		0x600

void (*acpi_do_wakeup)(u32 vector, u32 backup_source, u32 backup_target, u32
		backup_size) __attribute__((regparm(0))) = (void *)WAKEUP_BASE;

extern unsigned char __wakeup, __wakeup_size;

void acpi_jump_to_wakeup(void *vector)
{
	u32 acpi_backup_memory = (u32) cbmem_find(CBMEM_ID_RESUME);

	if (!acpi_backup_memory) {
		printk(BIOS_WARNING, "ACPI: Backup memory missing. No S3 Resume.\n");
		return;
	}

	// FIXME this should go into the ACPI backup memory, too. No pork saussages.
	/* just restore the SMP trampoline and continue with wakeup on assembly level */
	memcpy(lowmem_backup_ptr, lowmem_backup, lowmem_backup_size);

	/* copy wakeup trampoline in place */
	memcpy(WAKEUP_BASE, &__wakeup, &__wakeup_size);

	acpi_do_wakeup((u32)vector, acpi_backup_memory, CONFIG_RAMBASE, HIGH_MEMORY_SAVE);
}
#endif