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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 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 */
25
26#define pr_fmt(fmt) "ACPI: " fmt
27
28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/smp.h>
31#include <linux/string.h>
32#include <linux/types.h>
33#include <linux/irq.h>
34#include <linux/errno.h>
35#include <linux/acpi.h>
36#include <linux/bootmem.h>
37
38#define ACPI_MAX_TABLES 128
39
40static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
41static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
42
43static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
44
45static int acpi_apic_instance __initdata;
46
47void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
48{
49 if (!header)
50 return;
51
52 switch (header->type) {
53
54 case ACPI_MADT_TYPE_LOCAL_APIC:
55 {
56 struct acpi_madt_local_apic *p =
57 (struct acpi_madt_local_apic *)header;
58 pr_info("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
59 p->processor_id, p->id,
60 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
61 }
62 break;
63
64 case ACPI_MADT_TYPE_LOCAL_X2APIC:
65 {
66 struct acpi_madt_local_x2apic *p =
67 (struct acpi_madt_local_x2apic *)header;
68 pr_info("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
69 p->local_apic_id, p->uid,
70 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
71 }
72 break;
73
74 case ACPI_MADT_TYPE_IO_APIC:
75 {
76 struct acpi_madt_io_apic *p =
77 (struct acpi_madt_io_apic *)header;
78 pr_info("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
79 p->id, p->address, p->global_irq_base);
80 }
81 break;
82
83 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
84 {
85 struct acpi_madt_interrupt_override *p =
86 (struct acpi_madt_interrupt_override *)header;
87 pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
88 p->bus, p->source_irq, p->global_irq,
89 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
90 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
91 if (p->inti_flags &
92 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
93 pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n",
94 p->inti_flags &
95 ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
96 }
97 break;
98
99 case ACPI_MADT_TYPE_NMI_SOURCE:
100 {
101 struct acpi_madt_nmi_source *p =
102 (struct acpi_madt_nmi_source *)header;
103 pr_info("NMI_SRC (%s %s global_irq %d)\n",
104 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
105 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
106 p->global_irq);
107 }
108 break;
109
110 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
111 {
112 struct acpi_madt_local_apic_nmi *p =
113 (struct acpi_madt_local_apic_nmi *)header;
114 pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
115 p->processor_id,
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->lint);
119 }
120 break;
121
122 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
123 {
124 u16 polarity, trigger;
125 struct acpi_madt_local_x2apic_nmi *p =
126 (struct acpi_madt_local_x2apic_nmi *)header;
127
128 polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
129 trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
130
131 pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
132 p->uid,
133 mps_inti_flags_polarity[polarity],
134 mps_inti_flags_trigger[trigger],
135 p->lint);
136 }
137 break;
138
139 case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
140 {
141 struct acpi_madt_local_apic_override *p =
142 (struct acpi_madt_local_apic_override *)header;
143 pr_info("LAPIC_ADDR_OVR (address[%p])\n",
144 (void *)(unsigned long)p->address);
145 }
146 break;
147
148 case ACPI_MADT_TYPE_IO_SAPIC:
149 {
150 struct acpi_madt_io_sapic *p =
151 (struct acpi_madt_io_sapic *)header;
152 pr_info("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
153 p->id, (void *)(unsigned long)p->address,
154 p->global_irq_base);
155 }
156 break;
157
158 case ACPI_MADT_TYPE_LOCAL_SAPIC:
159 {
160 struct acpi_madt_local_sapic *p =
161 (struct acpi_madt_local_sapic *)header;
162 pr_info("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
163 p->processor_id, p->id, p->eid,
164 (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
165 }
166 break;
167
168 case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
169 {
170 struct acpi_madt_interrupt_source *p =
171 (struct acpi_madt_interrupt_source *)header;
172 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",
173 mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
174 mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
175 p->type, p->id, p->eid, p->io_sapic_vector,
176 p->global_irq);
177 }
178 break;
179
180 default:
181 pr_warn("Found unsupported MADT entry (type = 0x%x)\n",
182 header->type);
183 break;
184 }
185}
186
187
188int __init
189acpi_table_parse_entries(char *id,
190 unsigned long table_size,
191 int entry_id,
192 acpi_tbl_entry_handler handler,
193 unsigned int max_entries)
194{
195 struct acpi_table_header *table_header = NULL;
196 struct acpi_subtable_header *entry;
197 unsigned int count = 0;
198 unsigned long table_end;
199 acpi_size tbl_size;
200
201 if (acpi_disabled)
202 return -ENODEV;
203
204 if (!handler)
205 return -EINVAL;
206
207 if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
208 acpi_get_table_with_size(id, acpi_apic_instance, &table_header, &tbl_size);
209 else
210 acpi_get_table_with_size(id, 0, &table_header, &tbl_size);
211
212 if (!table_header) {
213 pr_warn("%4.4s not present\n", id);
214 return -ENODEV;
215 }
216
217 table_end = (unsigned long)table_header + table_header->length;
218
219 /* Parse all entries looking for a match. */
220
221 entry = (struct acpi_subtable_header *)
222 ((unsigned long)table_header + table_size);
223
224 while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
225 table_end) {
226 if (entry->type == entry_id
227 && (!max_entries || count++ < max_entries))
228 if (handler(entry, table_end))
229 goto err;
230
231 /*
232 * If entry->length is 0, break from this loop to avoid
233 * infinite loop.
234 */
235 if (entry->length == 0) {
236 pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, entry_id);
237 goto err;
238 }
239
240 entry = (struct acpi_subtable_header *)
241 ((unsigned long)entry + entry->length);
242 }
243 if (max_entries && count > max_entries) {
244 pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
245 id, entry_id, count - max_entries, count);
246 }
247
248 early_acpi_os_unmap_memory((char *)table_header, tbl_size);
249 return count;
250err:
251 early_acpi_os_unmap_memory((char *)table_header, tbl_size);
252 return -EINVAL;
253}
254
255int __init
256acpi_table_parse_madt(enum acpi_madt_type id,
257 acpi_tbl_entry_handler handler, unsigned int max_entries)
258{
259 return acpi_table_parse_entries(ACPI_SIG_MADT,
260 sizeof(struct acpi_table_madt), id,
261 handler, max_entries);
262}
263
264/**
265 * acpi_table_parse - find table with @id, run @handler on it
266 * @id: table id to find
267 * @handler: handler to run
268 *
269 * Scan the ACPI System Descriptor Table (STD) for a table matching @id,
270 * run @handler on it.
271 *
272 * Return 0 if table found, -errno if not.
273 */
274int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
275{
276 struct acpi_table_header *table = NULL;
277 acpi_size tbl_size;
278
279 if (acpi_disabled)
280 return -ENODEV;
281
282 if (!id || !handler)
283 return -EINVAL;
284
285 if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
286 acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size);
287 else
288 acpi_get_table_with_size(id, 0, &table, &tbl_size);
289
290 if (table) {
291 handler(table);
292 early_acpi_os_unmap_memory(table, tbl_size);
293 return 0;
294 } else
295 return -ENODEV;
296}
297
298/*
299 * The BIOS is supposed to supply a single APIC/MADT,
300 * but some report two. Provide a knob to use either.
301 * (don't you wish instance 0 and 1 were not the same?)
302 */
303static void __init check_multiple_madt(void)
304{
305 struct acpi_table_header *table = NULL;
306 acpi_size tbl_size;
307
308 acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
309 if (table) {
310 pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
311 acpi_apic_instance);
312 pr_warn("If \"acpi_apic_instance=%d\" works better, "
313 "notify linux-acpi@vger.kernel.org\n",
314 acpi_apic_instance ? 0 : 2);
315 early_acpi_os_unmap_memory(table, tbl_size);
316
317 } else
318 acpi_apic_instance = 0;
319
320 return;
321}
322
323/*
324 * acpi_table_init()
325 *
326 * find RSDP, find and checksum SDT/XSDT.
327 * checksum all tables, print SDT/XSDT
328 *
329 * result: sdt_entry[] is initialized
330 */
331
332int __init acpi_table_init(void)
333{
334 acpi_status status;
335
336 status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
337 if (ACPI_FAILURE(status))
338 return -EINVAL;
339
340 check_multiple_madt();
341 return 0;
342}
343
344static int __init acpi_parse_apic_instance(char *str)
345{
346 if (!str)
347 return -EINVAL;
348
349 acpi_apic_instance = simple_strtoul(str, NULL, 0);
350
351 pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance);
352
353 return 0;
354}
355
356early_param("acpi_apic_instance", acpi_parse_apic_instance);