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1/*
2 * acpi_tables.c - ACPI Boot-Time Table Parsing
3 *
4 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 *
20 */
21
22/* Uncomment next line to get verbose printout */
23/* #define DEBUG */
24#define pr_fmt(fmt) "ACPI: " fmt
25
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/smp.h>
29#include <linux/string.h>
30#include <linux/types.h>
31#include <linux/irq.h>
32#include <linux/errno.h>
33#include <linux/acpi.h>
34#include <linux/bootmem.h>
35#include "internal.h"
36
37#define ACPI_MAX_TABLES 128
38
39static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
40static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
41
42static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
43
44static int acpi_apic_instance __initdata;
45
46/*
47 * Disable table checksum verification for the early stage due to the size
48 * limitation of the current x86 early mapping implementation.
49 */
50static bool acpi_verify_table_checksum __initdata = false;
51
52void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
53{
54 if (!header)
55 return;
56
57 switch (header->type) {
58
59 case ACPI_MADT_TYPE_LOCAL_APIC:
60 {
61 struct acpi_madt_local_apic *p =
62 (struct acpi_madt_local_apic *)header;
63 pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
64 p->processor_id, p->id,
65 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
66 }
67 break;
68
69 case ACPI_MADT_TYPE_LOCAL_X2APIC:
70 {
71 struct acpi_madt_local_x2apic *p =
72 (struct acpi_madt_local_x2apic *)header;
73 pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
74 p->local_apic_id, p->uid,
75 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
76 }
77 break;
78
79 case ACPI_MADT_TYPE_IO_APIC:
80 {
81 struct acpi_madt_io_apic *p =
82 (struct acpi_madt_io_apic *)header;
83 pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
84 p->id, p->address, p->global_irq_base);
85 }
86 break;
87
88 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
89 {
90 struct acpi_madt_interrupt_override *p =
91 (struct acpi_madt_interrupt_override *)header;
92 pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
93 p->bus, p->source_irq, p->global_irq,
94 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
95 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
96 if (p->inti_flags &
97 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
98 pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n",
99 p->inti_flags &
100 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
101 }
102 break;
103
104 case ACPI_MADT_TYPE_NMI_SOURCE:
105 {
106 struct acpi_madt_nmi_source *p =
107 (struct acpi_madt_nmi_source *)header;
108 pr_info("NMI_SRC (%s %s global_irq %d)\n",
109 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
110 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
111 p->global_irq);
112 }
113 break;
114
115 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
116 {
117 struct acpi_madt_local_apic_nmi *p =
118 (struct acpi_madt_local_apic_nmi *)header;
119 pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
120 p->processor_id,
121 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
122 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
123 p->lint);
124 }
125 break;
126
127 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
128 {
129 u16 polarity, trigger;
130 struct acpi_madt_local_x2apic_nmi *p =
131 (struct acpi_madt_local_x2apic_nmi *)header;
132
133 polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
134 trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
135
136 pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
137 p->uid,
138 mps_inti_flags_polarity[polarity],
139 mps_inti_flags_trigger[trigger],
140 p->lint);
141 }
142 break;
143
144 case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
145 {
146 struct acpi_madt_local_apic_override *p =
147 (struct acpi_madt_local_apic_override *)header;
148 pr_info("LAPIC_ADDR_OVR (address[%p])\n",
149 (void *)(unsigned long)p->address);
150 }
151 break;
152
153 case ACPI_MADT_TYPE_IO_SAPIC:
154 {
155 struct acpi_madt_io_sapic *p =
156 (struct acpi_madt_io_sapic *)header;
157 pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
158 p->id, (void *)(unsigned long)p->address,
159 p->global_irq_base);
160 }
161 break;
162
163 case ACPI_MADT_TYPE_LOCAL_SAPIC:
164 {
165 struct acpi_madt_local_sapic *p =
166 (struct acpi_madt_local_sapic *)header;
167 pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
168 p->processor_id, p->id, p->eid,
169 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
170 }
171 break;
172
173 case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
174 {
175 struct acpi_madt_interrupt_source *p =
176 (struct acpi_madt_interrupt_source *)header;
177 pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
178 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
179 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
180 p->type, p->id, p->eid, p->io_sapic_vector,
181 p->global_irq);
182 }
183 break;
184
185 case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
186 {
187 struct acpi_madt_generic_interrupt *p =
188 (struct acpi_madt_generic_interrupt *)header;
189 pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n",
190 p->uid, p->base_address,
191 p->arm_mpidr,
192 (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
193
194 }
195 break;
196
197 case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
198 {
199 struct acpi_madt_generic_distributor *p =
200 (struct acpi_madt_generic_distributor *)header;
201 pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n",
202 p->gic_id, p->base_address,
203 p->global_irq_base);
204 }
205 break;
206
207 default:
208 pr_warn("Found unsupported MADT entry (type = 0x%x)\n",
209 header->type);
210 break;
211 }
212}
213
214/**
215 * acpi_parse_entries_array - for each proc_num find a suitable subtable
216 *
217 * @id: table id (for debugging purposes)
218 * @table_size: single entry size
219 * @table_header: where does the table start?
220 * @proc: array of acpi_subtable_proc struct containing entry id
221 * and associated handler with it
222 * @proc_num: how big proc is?
223 * @max_entries: how many entries can we process?
224 *
225 * For each proc_num find a subtable with proc->id and run proc->handler
226 * on it. Assumption is that there's only single handler for particular
227 * entry id.
228 *
229 * On success returns sum of all matching entries for all proc handlers.
230 * Otherwise, -ENODEV or -EINVAL is returned.
231 */
232static int __init
233acpi_parse_entries_array(char *id, unsigned long table_size,
234 struct acpi_table_header *table_header,
235 struct acpi_subtable_proc *proc, int proc_num,
236 unsigned int max_entries)
237{
238 struct acpi_subtable_header *entry;
239 unsigned long table_end;
240 int count = 0;
241 int i;
242
243 if (acpi_disabled)
244 return -ENODEV;
245
246 if (!id)
247 return -EINVAL;
248
249 if (!table_size)
250 return -EINVAL;
251
252 if (!table_header) {
253 pr_warn("%4.4s not present\n", id);
254 return -ENODEV;
255 }
256
257 table_end = (unsigned long)table_header + table_header->length;
258
259 /* Parse all entries looking for a match. */
260
261 entry = (struct acpi_subtable_header *)
262 ((unsigned long)table_header + table_size);
263
264 while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
265 table_end) {
266 if (max_entries && count >= max_entries)
267 break;
268
269 for (i = 0; i < proc_num; i++) {
270 if (entry->type != proc[i].id)
271 continue;
272 if (!proc[i].handler ||
273 proc[i].handler(entry, table_end))
274 return -EINVAL;
275
276 proc->count++;
277 break;
278 }
279 if (i != proc_num)
280 count++;
281
282 /*
283 * If entry->length is 0, break from this loop to avoid
284 * infinite loop.
285 */
286 if (entry->length == 0) {
287 pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);
288 return -EINVAL;
289 }
290
291 entry = (struct acpi_subtable_header *)
292 ((unsigned long)entry + entry->length);
293 }
294
295 if (max_entries && count > max_entries) {
296 pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
297 id, proc->id, count - max_entries, count);
298 }
299
300 return count;
301}
302
303int __init
304acpi_parse_entries(char *id,
305 unsigned long table_size,
306 acpi_tbl_entry_handler handler,
307 struct acpi_table_header *table_header,
308 int entry_id, unsigned int max_entries)
309{
310 struct acpi_subtable_proc proc = {
311 .id = entry_id,
312 .handler = handler,
313 };
314
315 return acpi_parse_entries_array(id, table_size, table_header,
316 &proc, 1, max_entries);
317}
318
319int __init
320acpi_table_parse_entries_array(char *id,
321 unsigned long table_size,
322 struct acpi_subtable_proc *proc, int proc_num,
323 unsigned int max_entries)
324{
325 struct acpi_table_header *table_header = NULL;
326 acpi_size tbl_size;
327 int count;
328 u32 instance = 0;
329
330 if (acpi_disabled)
331 return -ENODEV;
332
333 if (!id)
334 return -EINVAL;
335
336 if (!strncmp(id, ACPI_SIG_MADT, 4))
337 instance = acpi_apic_instance;
338
339 acpi_get_table_with_size(id, instance, &table_header, &tbl_size);
340 if (!table_header) {
341 pr_warn("%4.4s not present\n", id);
342 return -ENODEV;
343 }
344
345 count = acpi_parse_entries_array(id, table_size, table_header,
346 proc, proc_num, max_entries);
347
348 early_acpi_os_unmap_memory((char *)table_header, tbl_size);
349 return count;
350}
351
352int __init
353acpi_table_parse_entries(char *id,
354 unsigned long table_size,
355 int entry_id,
356 acpi_tbl_entry_handler handler,
357 unsigned int max_entries)
358{
359 struct acpi_subtable_proc proc = {
360 .id = entry_id,
361 .handler = handler,
362 };
363
364 return acpi_table_parse_entries_array(id, table_size, &proc, 1,
365 max_entries);
366}
367
368int __init
369acpi_table_parse_madt(enum acpi_madt_type id,
370 acpi_tbl_entry_handler handler, unsigned int max_entries)
371{
372 return acpi_table_parse_entries(ACPI_SIG_MADT,
373 sizeof(struct acpi_table_madt), id,
374 handler, max_entries);
375}
376
377/**
378 * acpi_table_parse - find table with @id, run @handler on it
379 * @id: table id to find
380 * @handler: handler to run
381 *
382 * Scan the ACPI System Descriptor Table (STD) for a table matching @id,
383 * run @handler on it.
384 *
385 * Return 0 if table found, -errno if not.
386 */
387int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
388{
389 struct acpi_table_header *table = NULL;
390 acpi_size tbl_size;
391
392 if (acpi_disabled)
393 return -ENODEV;
394
395 if (!id || !handler)
396 return -EINVAL;
397
398 if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
399 acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size);
400 else
401 acpi_get_table_with_size(id, 0, &table, &tbl_size);
402
403 if (table) {
404 handler(table);
405 early_acpi_os_unmap_memory(table, tbl_size);
406 return 0;
407 } else
408 return -ENODEV;
409}
410
411/*
412 * The BIOS is supposed to supply a single APIC/MADT,
413 * but some report two. Provide a knob to use either.
414 * (don't you wish instance 0 and 1 were not the same?)
415 */
416static void __init check_multiple_madt(void)
417{
418 struct acpi_table_header *table = NULL;
419 acpi_size tbl_size;
420
421 acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
422 if (table) {
423 pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
424 acpi_apic_instance);
425 pr_warn("If \"acpi_apic_instance=%d\" works better, "
426 "notify linux-acpi@vger.kernel.org\n",
427 acpi_apic_instance ? 0 : 2);
428 early_acpi_os_unmap_memory(table, tbl_size);
429
430 } else
431 acpi_apic_instance = 0;
432
433 return;
434}
435
436/*
437 * acpi_table_init()
438 *
439 * find RSDP, find and checksum SDT/XSDT.
440 * checksum all tables, print SDT/XSDT
441 *
442 * result: sdt_entry[] is initialized
443 */
444
445int __init acpi_table_init(void)
446{
447 acpi_status status;
448
449 if (acpi_verify_table_checksum) {
450 pr_info("Early table checksum verification enabled\n");
451 acpi_gbl_verify_table_checksum = TRUE;
452 } else {
453 pr_info("Early table checksum verification disabled\n");
454 acpi_gbl_verify_table_checksum = FALSE;
455 }
456
457 status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
458 if (ACPI_FAILURE(status))
459 return -EINVAL;
460 acpi_initrd_initialize_tables();
461
462 check_multiple_madt();
463 return 0;
464}
465
466static int __init acpi_parse_apic_instance(char *str)
467{
468 if (!str)
469 return -EINVAL;
470
471 if (kstrtoint(str, 0, &acpi_apic_instance))
472 return -EINVAL;
473
474 pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance);
475
476 return 0;
477}
478
479early_param("acpi_apic_instance", acpi_parse_apic_instance);
480
481static int __init acpi_force_table_verification_setup(char *s)
482{
483 acpi_verify_table_checksum = true;
484
485 return 0;
486}
487
488early_param("acpi_force_table_verification", acpi_force_table_verification_setup);
489
490static int __init acpi_force_32bit_fadt_addr(char *s)
491{
492 pr_info("Forcing 32 Bit FADT addresses\n");
493 acpi_gbl_use32_bit_fadt_addresses = TRUE;
494
495 return 0;
496}
497
498early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr);
1/*
2 * acpi_tables.c - ACPI Boot-Time Table Parsing
3 *
4 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 *
20 */
21
22/* Uncomment next line to get verbose printout */
23/* #define DEBUG */
24#define pr_fmt(fmt) "ACPI: " fmt
25
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/smp.h>
29#include <linux/string.h>
30#include <linux/types.h>
31#include <linux/irq.h>
32#include <linux/errno.h>
33#include <linux/acpi.h>
34#include <linux/bootmem.h>
35#include <linux/earlycpio.h>
36#include <linux/memblock.h>
37#include <linux/initrd.h>
38#include "internal.h"
39
40#ifdef CONFIG_ACPI_CUSTOM_DSDT
41#include CONFIG_ACPI_CUSTOM_DSDT_FILE
42#endif
43
44#define ACPI_MAX_TABLES 128
45
46static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
47static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
48
49static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
50
51static int acpi_apic_instance __initdata;
52
53/*
54 * Disable table checksum verification for the early stage due to the size
55 * limitation of the current x86 early mapping implementation.
56 */
57static bool acpi_verify_table_checksum __initdata = false;
58
59void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
60{
61 if (!header)
62 return;
63
64 switch (header->type) {
65
66 case ACPI_MADT_TYPE_LOCAL_APIC:
67 {
68 struct acpi_madt_local_apic *p =
69 (struct acpi_madt_local_apic *)header;
70 pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
71 p->processor_id, p->id,
72 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
73 }
74 break;
75
76 case ACPI_MADT_TYPE_LOCAL_X2APIC:
77 {
78 struct acpi_madt_local_x2apic *p =
79 (struct acpi_madt_local_x2apic *)header;
80 pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
81 p->local_apic_id, p->uid,
82 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
83 }
84 break;
85
86 case ACPI_MADT_TYPE_IO_APIC:
87 {
88 struct acpi_madt_io_apic *p =
89 (struct acpi_madt_io_apic *)header;
90 pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
91 p->id, p->address, p->global_irq_base);
92 }
93 break;
94
95 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
96 {
97 struct acpi_madt_interrupt_override *p =
98 (struct acpi_madt_interrupt_override *)header;
99 pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
100 p->bus, p->source_irq, p->global_irq,
101 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
102 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
103 if (p->inti_flags &
104 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
105 pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n",
106 p->inti_flags &
107 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
108 }
109 break;
110
111 case ACPI_MADT_TYPE_NMI_SOURCE:
112 {
113 struct acpi_madt_nmi_source *p =
114 (struct acpi_madt_nmi_source *)header;
115 pr_info("NMI_SRC (%s %s global_irq %d)\n",
116 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
117 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
118 p->global_irq);
119 }
120 break;
121
122 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
123 {
124 struct acpi_madt_local_apic_nmi *p =
125 (struct acpi_madt_local_apic_nmi *)header;
126 pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
127 p->processor_id,
128 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
129 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
130 p->lint);
131 }
132 break;
133
134 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
135 {
136 u16 polarity, trigger;
137 struct acpi_madt_local_x2apic_nmi *p =
138 (struct acpi_madt_local_x2apic_nmi *)header;
139
140 polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
141 trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
142
143 pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
144 p->uid,
145 mps_inti_flags_polarity[polarity],
146 mps_inti_flags_trigger[trigger],
147 p->lint);
148 }
149 break;
150
151 case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
152 {
153 struct acpi_madt_local_apic_override *p =
154 (struct acpi_madt_local_apic_override *)header;
155 pr_info("LAPIC_ADDR_OVR (address[%p])\n",
156 (void *)(unsigned long)p->address);
157 }
158 break;
159
160 case ACPI_MADT_TYPE_IO_SAPIC:
161 {
162 struct acpi_madt_io_sapic *p =
163 (struct acpi_madt_io_sapic *)header;
164 pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
165 p->id, (void *)(unsigned long)p->address,
166 p->global_irq_base);
167 }
168 break;
169
170 case ACPI_MADT_TYPE_LOCAL_SAPIC:
171 {
172 struct acpi_madt_local_sapic *p =
173 (struct acpi_madt_local_sapic *)header;
174 pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
175 p->processor_id, p->id, p->eid,
176 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
177 }
178 break;
179
180 case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
181 {
182 struct acpi_madt_interrupt_source *p =
183 (struct acpi_madt_interrupt_source *)header;
184 pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
185 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
186 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
187 p->type, p->id, p->eid, p->io_sapic_vector,
188 p->global_irq);
189 }
190 break;
191
192 case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
193 {
194 struct acpi_madt_generic_interrupt *p =
195 (struct acpi_madt_generic_interrupt *)header;
196 pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n",
197 p->uid, p->base_address,
198 p->arm_mpidr,
199 (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
200
201 }
202 break;
203
204 case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
205 {
206 struct acpi_madt_generic_distributor *p =
207 (struct acpi_madt_generic_distributor *)header;
208 pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n",
209 p->gic_id, p->base_address,
210 p->global_irq_base);
211 }
212 break;
213
214 default:
215 pr_warn("Found unsupported MADT entry (type = 0x%x)\n",
216 header->type);
217 break;
218 }
219}
220
221/**
222 * acpi_parse_entries_array - for each proc_num find a suitable subtable
223 *
224 * @id: table id (for debugging purposes)
225 * @table_size: single entry size
226 * @table_header: where does the table start?
227 * @proc: array of acpi_subtable_proc struct containing entry id
228 * and associated handler with it
229 * @proc_num: how big proc is?
230 * @max_entries: how many entries can we process?
231 *
232 * For each proc_num find a subtable with proc->id and run proc->handler
233 * on it. Assumption is that there's only single handler for particular
234 * entry id.
235 *
236 * On success returns sum of all matching entries for all proc handlers.
237 * Otherwise, -ENODEV or -EINVAL is returned.
238 */
239static int __init
240acpi_parse_entries_array(char *id, unsigned long table_size,
241 struct acpi_table_header *table_header,
242 struct acpi_subtable_proc *proc, int proc_num,
243 unsigned int max_entries)
244{
245 struct acpi_subtable_header *entry;
246 unsigned long table_end;
247 int count = 0;
248 int errs = 0;
249 int i;
250
251 if (acpi_disabled)
252 return -ENODEV;
253
254 if (!id)
255 return -EINVAL;
256
257 if (!table_size)
258 return -EINVAL;
259
260 if (!table_header) {
261 pr_warn("%4.4s not present\n", id);
262 return -ENODEV;
263 }
264
265 table_end = (unsigned long)table_header + table_header->length;
266
267 /* Parse all entries looking for a match. */
268
269 entry = (struct acpi_subtable_header *)
270 ((unsigned long)table_header + table_size);
271
272 while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
273 table_end) {
274 if (max_entries && count >= max_entries)
275 break;
276
277 for (i = 0; i < proc_num; i++) {
278 if (entry->type != proc[i].id)
279 continue;
280 if (!proc[i].handler ||
281 (!errs && proc[i].handler(entry, table_end))) {
282 errs++;
283 continue;
284 }
285
286 proc[i].count++;
287 break;
288 }
289 if (i != proc_num)
290 count++;
291
292 /*
293 * If entry->length is 0, break from this loop to avoid
294 * infinite loop.
295 */
296 if (entry->length == 0) {
297 pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);
298 return -EINVAL;
299 }
300
301 entry = (struct acpi_subtable_header *)
302 ((unsigned long)entry + entry->length);
303 }
304
305 if (max_entries && count > max_entries) {
306 pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n",
307 id, proc->id, count);
308 }
309
310 return errs ? -EINVAL : count;
311}
312
313int __init
314acpi_parse_entries(char *id,
315 unsigned long table_size,
316 acpi_tbl_entry_handler handler,
317 struct acpi_table_header *table_header,
318 int entry_id, unsigned int max_entries)
319{
320 struct acpi_subtable_proc proc = {
321 .id = entry_id,
322 .handler = handler,
323 };
324
325 return acpi_parse_entries_array(id, table_size, table_header,
326 &proc, 1, max_entries);
327}
328
329int __init
330acpi_table_parse_entries_array(char *id,
331 unsigned long table_size,
332 struct acpi_subtable_proc *proc, int proc_num,
333 unsigned int max_entries)
334{
335 struct acpi_table_header *table_header = NULL;
336 int count;
337 u32 instance = 0;
338
339 if (acpi_disabled)
340 return -ENODEV;
341
342 if (!id)
343 return -EINVAL;
344
345 if (!strncmp(id, ACPI_SIG_MADT, 4))
346 instance = acpi_apic_instance;
347
348 acpi_get_table(id, instance, &table_header);
349 if (!table_header) {
350 pr_warn("%4.4s not present\n", id);
351 return -ENODEV;
352 }
353
354 count = acpi_parse_entries_array(id, table_size, table_header,
355 proc, proc_num, max_entries);
356
357 acpi_put_table(table_header);
358 return count;
359}
360
361int __init
362acpi_table_parse_entries(char *id,
363 unsigned long table_size,
364 int entry_id,
365 acpi_tbl_entry_handler handler,
366 unsigned int max_entries)
367{
368 struct acpi_subtable_proc proc = {
369 .id = entry_id,
370 .handler = handler,
371 };
372
373 return acpi_table_parse_entries_array(id, table_size, &proc, 1,
374 max_entries);
375}
376
377int __init
378acpi_table_parse_madt(enum acpi_madt_type id,
379 acpi_tbl_entry_handler handler, unsigned int max_entries)
380{
381 return acpi_table_parse_entries(ACPI_SIG_MADT,
382 sizeof(struct acpi_table_madt), id,
383 handler, max_entries);
384}
385
386/**
387 * acpi_table_parse - find table with @id, run @handler on it
388 * @id: table id to find
389 * @handler: handler to run
390 *
391 * Scan the ACPI System Descriptor Table (STD) for a table matching @id,
392 * run @handler on it.
393 *
394 * Return 0 if table found, -errno if not.
395 */
396int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
397{
398 struct acpi_table_header *table = NULL;
399
400 if (acpi_disabled)
401 return -ENODEV;
402
403 if (!id || !handler)
404 return -EINVAL;
405
406 if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
407 acpi_get_table(id, acpi_apic_instance, &table);
408 else
409 acpi_get_table(id, 0, &table);
410
411 if (table) {
412 handler(table);
413 acpi_put_table(table);
414 return 0;
415 } else
416 return -ENODEV;
417}
418
419/*
420 * The BIOS is supposed to supply a single APIC/MADT,
421 * but some report two. Provide a knob to use either.
422 * (don't you wish instance 0 and 1 were not the same?)
423 */
424static void __init check_multiple_madt(void)
425{
426 struct acpi_table_header *table = NULL;
427
428 acpi_get_table(ACPI_SIG_MADT, 2, &table);
429 if (table) {
430 pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
431 acpi_apic_instance);
432 pr_warn("If \"acpi_apic_instance=%d\" works better, "
433 "notify linux-acpi@vger.kernel.org\n",
434 acpi_apic_instance ? 0 : 2);
435 acpi_put_table(table);
436
437 } else
438 acpi_apic_instance = 0;
439
440 return;
441}
442
443static void acpi_table_taint(struct acpi_table_header *table)
444{
445 pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
446 table->signature, table->oem_table_id);
447 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
448}
449
450#ifdef CONFIG_ACPI_TABLE_UPGRADE
451static u64 acpi_tables_addr;
452static int all_tables_size;
453
454/* Copied from acpica/tbutils.c:acpi_tb_checksum() */
455static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
456{
457 u8 sum = 0;
458 u8 *end = buffer + length;
459
460 while (buffer < end)
461 sum = (u8) (sum + *(buffer++));
462 return sum;
463}
464
465/* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
466static const char * const table_sigs[] = {
467 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
468 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
469 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
470 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
471 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
472 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
473 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
474 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
475 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
476
477#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
478
479#define NR_ACPI_INITRD_TABLES 64
480static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES];
481static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES);
482
483#define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
484
485void __init acpi_table_upgrade(void)
486{
487 void *data = (void *)initrd_start;
488 size_t size = initrd_end - initrd_start;
489 int sig, no, table_nr = 0, total_offset = 0;
490 long offset = 0;
491 struct acpi_table_header *table;
492 char cpio_path[32] = "kernel/firmware/acpi/";
493 struct cpio_data file;
494
495 if (data == NULL || size == 0)
496 return;
497
498 for (no = 0; no < NR_ACPI_INITRD_TABLES; no++) {
499 file = find_cpio_data(cpio_path, data, size, &offset);
500 if (!file.data)
501 break;
502
503 data += offset;
504 size -= offset;
505
506 if (file.size < sizeof(struct acpi_table_header)) {
507 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
508 cpio_path, file.name);
509 continue;
510 }
511
512 table = file.data;
513
514 for (sig = 0; table_sigs[sig]; sig++)
515 if (!memcmp(table->signature, table_sigs[sig], 4))
516 break;
517
518 if (!table_sigs[sig]) {
519 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
520 cpio_path, file.name);
521 continue;
522 }
523 if (file.size != table->length) {
524 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
525 cpio_path, file.name);
526 continue;
527 }
528 if (acpi_table_checksum(file.data, table->length)) {
529 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
530 cpio_path, file.name);
531 continue;
532 }
533
534 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
535 table->signature, cpio_path, file.name, table->length);
536
537 all_tables_size += table->length;
538 acpi_initrd_files[table_nr].data = file.data;
539 acpi_initrd_files[table_nr].size = file.size;
540 table_nr++;
541 }
542 if (table_nr == 0)
543 return;
544
545 acpi_tables_addr =
546 memblock_find_in_range(0, ACPI_TABLE_UPGRADE_MAX_PHYS,
547 all_tables_size, PAGE_SIZE);
548 if (!acpi_tables_addr) {
549 WARN_ON(1);
550 return;
551 }
552 /*
553 * Only calling e820_add_reserve does not work and the
554 * tables are invalid (memory got used) later.
555 * memblock_reserve works as expected and the tables won't get modified.
556 * But it's not enough on X86 because ioremap will
557 * complain later (used by acpi_os_map_memory) that the pages
558 * that should get mapped are not marked "reserved".
559 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
560 * works fine.
561 */
562 memblock_reserve(acpi_tables_addr, all_tables_size);
563 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
564
565 /*
566 * early_ioremap only can remap 256k one time. If we map all
567 * tables one time, we will hit the limit. Need to map chunks
568 * one by one during copying the same as that in relocate_initrd().
569 */
570 for (no = 0; no < table_nr; no++) {
571 unsigned char *src_p = acpi_initrd_files[no].data;
572 phys_addr_t size = acpi_initrd_files[no].size;
573 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
574 phys_addr_t slop, clen;
575 char *dest_p;
576
577 total_offset += size;
578
579 while (size) {
580 slop = dest_addr & ~PAGE_MASK;
581 clen = size;
582 if (clen > MAP_CHUNK_SIZE - slop)
583 clen = MAP_CHUNK_SIZE - slop;
584 dest_p = early_memremap(dest_addr & PAGE_MASK,
585 clen + slop);
586 memcpy(dest_p + slop, src_p, clen);
587 early_memunmap(dest_p, clen + slop);
588 src_p += clen;
589 dest_addr += clen;
590 size -= clen;
591 }
592 }
593}
594
595static acpi_status
596acpi_table_initrd_override(struct acpi_table_header *existing_table,
597 acpi_physical_address *address, u32 *length)
598{
599 int table_offset = 0;
600 int table_index = 0;
601 struct acpi_table_header *table;
602 u32 table_length;
603
604 *length = 0;
605 *address = 0;
606 if (!acpi_tables_addr)
607 return AE_OK;
608
609 while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
610 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
611 ACPI_HEADER_SIZE);
612 if (table_offset + table->length > all_tables_size) {
613 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
614 WARN_ON(1);
615 return AE_OK;
616 }
617
618 table_length = table->length;
619
620 /* Only override tables matched */
621 if (memcmp(existing_table->signature, table->signature, 4) ||
622 memcmp(table->oem_id, existing_table->oem_id,
623 ACPI_OEM_ID_SIZE) ||
624 memcmp(table->oem_table_id, existing_table->oem_table_id,
625 ACPI_OEM_TABLE_ID_SIZE)) {
626 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
627 goto next_table;
628 }
629 /*
630 * Mark the table to avoid being used in
631 * acpi_table_initrd_scan() and check the revision.
632 */
633 if (test_and_set_bit(table_index, acpi_initrd_installed) ||
634 existing_table->oem_revision >= table->oem_revision) {
635 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
636 goto next_table;
637 }
638
639 *length = table_length;
640 *address = acpi_tables_addr + table_offset;
641 pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n",
642 table->signature, table->oem_id,
643 table->oem_table_id);
644 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
645 break;
646
647next_table:
648 table_offset += table_length;
649 table_index++;
650 }
651 return AE_OK;
652}
653
654static void __init acpi_table_initrd_scan(void)
655{
656 int table_offset = 0;
657 int table_index = 0;
658 u32 table_length;
659 struct acpi_table_header *table;
660
661 if (!acpi_tables_addr)
662 return;
663
664 while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
665 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
666 ACPI_HEADER_SIZE);
667 if (table_offset + table->length > all_tables_size) {
668 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
669 WARN_ON(1);
670 return;
671 }
672
673 table_length = table->length;
674
675 /* Skip RSDT/XSDT which should only be used for override */
676 if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) ||
677 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) {
678 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
679 goto next_table;
680 }
681 /*
682 * Mark the table to avoid being used in
683 * acpi_table_initrd_override(). Though this is not possible
684 * because override is disabled in acpi_install_table().
685 */
686 if (test_and_set_bit(table_index, acpi_initrd_installed)) {
687 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
688 goto next_table;
689 }
690
691 pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n",
692 table->signature, table->oem_id,
693 table->oem_table_id);
694 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
695 acpi_install_table(acpi_tables_addr + table_offset, TRUE);
696next_table:
697 table_offset += table_length;
698 table_index++;
699 }
700}
701#else
702static acpi_status
703acpi_table_initrd_override(struct acpi_table_header *existing_table,
704 acpi_physical_address *address,
705 u32 *table_length)
706{
707 *table_length = 0;
708 *address = 0;
709 return AE_OK;
710}
711
712static void __init acpi_table_initrd_scan(void)
713{
714}
715#endif /* CONFIG_ACPI_TABLE_UPGRADE */
716
717acpi_status
718acpi_os_physical_table_override(struct acpi_table_header *existing_table,
719 acpi_physical_address *address,
720 u32 *table_length)
721{
722 return acpi_table_initrd_override(existing_table, address,
723 table_length);
724}
725
726acpi_status
727acpi_os_table_override(struct acpi_table_header *existing_table,
728 struct acpi_table_header **new_table)
729{
730 if (!existing_table || !new_table)
731 return AE_BAD_PARAMETER;
732
733 *new_table = NULL;
734
735#ifdef CONFIG_ACPI_CUSTOM_DSDT
736 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
737 *new_table = (struct acpi_table_header *)AmlCode;
738#endif
739 if (*new_table != NULL)
740 acpi_table_taint(existing_table);
741 return AE_OK;
742}
743
744/*
745 * acpi_table_init()
746 *
747 * find RSDP, find and checksum SDT/XSDT.
748 * checksum all tables, print SDT/XSDT
749 *
750 * result: sdt_entry[] is initialized
751 */
752
753int __init acpi_table_init(void)
754{
755 acpi_status status;
756
757 if (acpi_verify_table_checksum) {
758 pr_info("Early table checksum verification enabled\n");
759 acpi_gbl_verify_table_checksum = TRUE;
760 } else {
761 pr_info("Early table checksum verification disabled\n");
762 acpi_gbl_verify_table_checksum = FALSE;
763 }
764
765 status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
766 if (ACPI_FAILURE(status))
767 return -EINVAL;
768 acpi_table_initrd_scan();
769
770 check_multiple_madt();
771 return 0;
772}
773
774static int __init acpi_parse_apic_instance(char *str)
775{
776 if (!str)
777 return -EINVAL;
778
779 if (kstrtoint(str, 0, &acpi_apic_instance))
780 return -EINVAL;
781
782 pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance);
783
784 return 0;
785}
786
787early_param("acpi_apic_instance", acpi_parse_apic_instance);
788
789static int __init acpi_force_table_verification_setup(char *s)
790{
791 acpi_verify_table_checksum = true;
792
793 return 0;
794}
795
796early_param("acpi_force_table_verification", acpi_force_table_verification_setup);
797
798static int __init acpi_force_32bit_fadt_addr(char *s)
799{
800 pr_info("Forcing 32 Bit FADT addresses\n");
801 acpi_gbl_use32_bit_fadt_addresses = TRUE;
802
803 return 0;
804}
805
806early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr);